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added minmal libaries

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This commit is contained in:
Oliver Walter
2024-02-02 02:44:24 +01:00
parent 1c693986ed
commit f0387d9e80
17 changed files with 1786 additions and 62 deletions
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3
.gitmodules vendored Normal file
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@@ -0,0 +1,3 @@
[submodule "lib/nanopb"]
path = lib/nanopb
url = https://github.com/nanopb/nanopb.git

5
.vscode/settings.json vendored Normal file
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@@ -0,0 +1,5 @@
{
"files.associations": {
"stm32h7xx_hal_conf.h": "c"
}
}

113
CMakeLists.txt
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@@ -60,62 +60,28 @@ set(linker_OPTS)
# information to the project # information to the project
include("cmake_generated/cmake_generated.cmake") include("cmake_generated/cmake_generated.cmake")
# Link directories setup
# Must be before executable is added
link_directories(${CMAKE_PROJECT_NAME} ${link_DIRS})
# Create an executable object type set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/nanopb/extra)
add_executable(${CMAKE_PROJECT_NAME}) find_package(Nanopb REQUIRED)
include_directories(${NANOPB_INCLUDE_DIRS})
nanopb_generate_cpp(PROTO_SRCS PROTO_HDRS RELPATH proto proto/firmware.proto)
add_library(PROTOS ${PROTO_SRCS} ${PROTO_HDRS})
target_include_directories(PROTOS PUBLIC ${NANOPB_INCLUDE_DIRS})
# Add sources to executable
target_sources(${CMAKE_PROJECT_NAME} PUBLIC ${sources_SRCS})
# Add include paths # these options need to be applied for the hole project
target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE # so that all subprojects and libaries are compiled and compatable
${include_DIRS} add_compile_options(
$<$<COMPILE_LANGUAGE:C>: ${include_c_DIRS}>
$<$<COMPILE_LANGUAGE:CXX>: ${include_cxx_DIRS}>
$<$<COMPILE_LANGUAGE:ASM>: ${include_asm_DIRS}>
)
# Add project symbols (macros)
target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE
${symbols_SYMB}
$<$<COMPILE_LANGUAGE:C>: ${symbols_c_SYMB}>
$<$<COMPILE_LANGUAGE:CXX>: ${symbols_cxx_SYMB}>
$<$<COMPILE_LANGUAGE:ASM>: ${symbols_asm_SYMB}>
# Configuration specific
$<$<CONFIG:Debug>:DEBUG>
$<$<CONFIG:Release>: >
)
# Add linked libraries
target_link_libraries(${CMAKE_PROJECT_NAME} ${link_LIBS})
# Compiler options
target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE
${cpu_PARAMS} ${cpu_PARAMS}
${compiler_OPTS} ${compiler_OPTS}
-Wall -Wall
-Wextra -Wextra
-Wpedantic -Wpedantic
-Wno-unused-parameter -Wno-unused-parameter
$<$<COMPILE_LANGUAGE:C>: > -flto
$<$<COMPILE_LANGUAGE:CXX>:
# -Wno-volatile
# -Wold-style-cast
# -Wuseless-cast
# -Wsuggest-override
>
$<$<COMPILE_LANGUAGE:ASM>:-x assembler-with-cpp -MMD -MP>
$<$<CONFIG:Debug>:-Og -g3 -ggdb>
$<$<CONFIG:Release>:-Og -g0>
) )
# Linker options add_link_options(
target_link_options(${CMAKE_PROJECT_NAME} PRIVATE
-T${linker_script_SRC} -T${linker_script_SRC}
${cpu_PARAMS} ${cpu_PARAMS}
${linker_OPTS} ${linker_OPTS}
@@ -128,10 +94,67 @@ target_link_options(${CMAKE_PROJECT_NAME} PRIVATE
-lstdc++ -lstdc++
-lsupc++ -lsupc++
-Wl,--end-group -Wl,--end-group
-flto
-Wl,-z,max-page-size=8 # Allow good software remapping across address space (with proper GCC section making) -Wl,-z,max-page-size=8 # Allow good software remapping across address space (with proper GCC section making)
-Wl,--print-memory-usage -Wl,--print-memory-usage
) )
# Link directories setup
# Must be before executable is added
link_directories(${CMAKE_PROJECT_NAME} ${link_DIRS})
# Create an executable object type
add_executable(${CMAKE_PROJECT_NAME})
# Add sources to executable
target_sources(${CMAKE_PROJECT_NAME} PUBLIC ${sources_SRCS})
# Add include paths
# these options need to be applied for the hole project
include_directories(
${include_DIRS}
$<$<COMPILE_LANGUAGE:C>: ${include_c_DIRS}>
$<$<COMPILE_LANGUAGE:CXX>: ${include_cxx_DIRS}>
$<$<COMPILE_LANGUAGE:ASM>: ${include_asm_DIRS}>
)
# Add project symbols (macros)
add_compile_definitions(
${symbols_SYMB}
${symbols_c_SYMB}
${symbols_cxx_SYMB}
${symbols_asm_SYMB}
)
add_subdirectory("lib")
add_subdirectory("Application")
# Add linked libraries
# target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC protobuf-nanopb-static)
target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC uart_driver)
target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC lwrb)
target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC PROTOS)
target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC Tasks)
# Compiler options
target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE
$<$<COMPILE_LANGUAGE:C>: >
$<$<COMPILE_LANGUAGE:CXX>:
# -Wno-volatile
# -Wold-style-cast
# -Wuseless-cast
# -Wsuggest-override
>
$<$<COMPILE_LANGUAGE:ASM>:-x assembler-with-cpp -MMD -MP>
$<$<CONFIG:Debug>:-Og -g3 -ggdb>
$<$<CONFIG:Release>:-O3 -g0>
)
# Linker options
target_link_options(${CMAKE_PROJECT_NAME} PRIVATE
)
# Execute post-build to print size, generate hex and bin # Execute post-build to print size, generate hex and bin
add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD add_custom_command(TARGET ${CMAKE_PROJECT_NAME} POST_BUILD
COMMAND ${CMAKE_SIZE} $<TARGET_FILE:${CMAKE_PROJECT_NAME}> COMMAND ${CMAKE_SIZE} $<TARGET_FILE:${CMAKE_PROJECT_NAME}>

4
FATFS/Target/sd_diskio.c
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@@ -641,7 +641,7 @@ void BSP_SD_WriteCpltCallback(void)
osMessagePut(SDQueueID, WRITE_CPLT_MSG, 0); osMessagePut(SDQueueID, WRITE_CPLT_MSG, 0);
#else #else
const uint16_t msg = WRITE_CPLT_MSG; const uint16_t msg = WRITE_CPLT_MSG;
osMessageQueuePut(SDQueueID, (const void *)&msg, NULL, 0); osMessageQueuePut(SDQueueID, (const void *)&msg, 0, 0);
#endif #endif
} }
@@ -660,7 +660,7 @@ void BSP_SD_ReadCpltCallback(void)
osMessagePut(SDQueueID, READ_CPLT_MSG, 0); osMessagePut(SDQueueID, READ_CPLT_MSG, 0);
#else #else
const uint16_t msg = READ_CPLT_MSG; const uint16_t msg = READ_CPLT_MSG;
osMessageQueuePut(SDQueueID, (const void *)&msg, NULL, 0); osMessageQueuePut(SDQueueID, (const void *)&msg, 0, 0);
#endif #endif
} }

3
USB_DEVICE/App/usbd_cdc_if.c
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@@ -22,7 +22,7 @@
#include "usbd_cdc_if.h" #include "usbd_cdc_if.h"
/* USER CODE BEGIN INCLUDE */ /* USER CODE BEGIN INCLUDE */
#include "UsbDataHandler.h"
/* USER CODE END INCLUDE */ /* USER CODE END INCLUDE */
/* Private typedef -----------------------------------------------------------*/ /* Private typedef -----------------------------------------------------------*/
@@ -264,6 +264,7 @@ static int8_t CDC_Control_HS(uint8_t cmd, uint8_t* pbuf, uint16_t length)
static int8_t CDC_Receive_HS(uint8_t* Buf, uint32_t *Len) static int8_t CDC_Receive_HS(uint8_t* Buf, uint32_t *Len)
{ {
/* USER CODE BEGIN 11 */ /* USER CODE BEGIN 11 */
UsbDataHandler_RxCallback(Buf,*Len);
USBD_CDC_SetRxBuffer(&hUsbDeviceHS, &Buf[0]); USBD_CDC_SetRxBuffer(&hUsbDeviceHS, &Buf[0]);
USBD_CDC_ReceivePacket(&hUsbDeviceHS); USBD_CDC_ReceivePacket(&hUsbDeviceHS);
return (USBD_OK); return (USBD_OK);

16
cmake_generated/cmake_generated.cmake
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@@ -23,10 +23,8 @@ set(sources_SRCS ${sources_SRCS}
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/crc.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/crc.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/dma.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/dma.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/fdcan.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/fdcan.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/freertos.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/gpio.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/gpio.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/i2c.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/i2c.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/main.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/rng.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/rng.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/rtc.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/rtc.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/sdmmc.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/sdmmc.c
@@ -36,6 +34,8 @@ set(sources_SRCS ${sources_SRCS}
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/syscalls.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/syscalls.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/sysmem.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/sysmem.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/system_stm32h7xx.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/system_stm32h7xx.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/freertos.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/main.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/usart.c ${CMAKE_CURRENT_SOURCE_DIR}/Core/Src/usart.c
${CMAKE_CURRENT_SOURCE_DIR}/Core/Startup/startup_stm32h723vgtx.s ${CMAKE_CURRENT_SOURCE_DIR}/Core/Startup/startup_stm32h723vgtx.s
${CMAKE_CURRENT_SOURCE_DIR}/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal.c ${CMAKE_CURRENT_SOURCE_DIR}/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal.c
@@ -140,15 +140,3 @@ set(symbols_cxx_SYMB ${symbols_cxx_SYMB})
set(symbols_asm_SYMB ${symbols_asm_SYMB} set(symbols_asm_SYMB ${symbols_asm_SYMB}
"DEBUG" "DEBUG"
) )
# Link directories
set(link_DIRS ${link_DIRS})
# Link libraries
set(link_LIBS ${link_LIBS})
# Compiler options
set(compiler_OPTS ${compiler_OPTS})
# Linker options
set(linker_OPTS ${linker_OPTS})

3
lib/CMakeLists.txt Normal file
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@@ -0,0 +1,3 @@
add_subdirectory(lwrb)
add_subdirectory(uart_driver)
add_subdirectory(nanopb)

16
lib/lwrb/CMakeLists.txt Normal file
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@@ -0,0 +1,16 @@
cmake_minimum_required(VERSION 3.12)
project(lwrb C)
add_library(${PROJECT_NAME} "")
target_sources(${PROJECT_NAME}
PRIVATE
${CMAKE_CURRENT_LIST_DIR}/lwrb.c
INTERFACE
${CMAKE_CURRENT_LIST_DIR}/lwrb.h
)
target_include_directories(${PROJECT_NAME}
INTERFACE
${CMAKE_CURRENT_LIST_DIR}
)

462
lib/lwrb/lwrb.c Normal file
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@@ -0,0 +1,462 @@
/**
* \file lwrb.c
* \brief Lightweight ring buffer
*/
/*
* Copyright (c) 2020 Tilen MAJERLE
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* This file is part of LwRB - Lightweight ring buffer library.
*
* Author: Tilen MAJERLE <tilen@majerle.eu>
* Version: v2.0.0
*/
#include "lwrb.h"
/* Memory set and copy functions */
#define BUF_MEMSET memset
#define BUF_MEMCPY memcpy
#if LWRB_USE_MAGIC
#define BUF_IS_VALID(b) ((b) != NULL && (b)->magic1 == 0xDEADBEEF && (b)->magic2 == ~0xDEADBEEF && (b)->buff != NULL && (b)->size > 0)
#else
#define BUF_IS_VALID(b) ((b) != NULL && (b)->buff != NULL && (b)->size > 0)
#endif /* LWRB_USE_MAGIC */
#define BUF_MIN(x, y) ((x) < (y) ? (x) : (y))
#define BUF_MAX(x, y) ((x) > (y) ? (x) : (y))
#define BUF_SEND_EVT(b, type, bp) do { if ((b)->evt_fn != NULL) { (b)->evt_fn((b), (type), (bp)); } } while (0)
/**
* \brief Initialize buffer handle to default values with size and buffer data array
* \param[in] buff: Buffer handle
* \param[in] buffdata: Pointer to memory to use as buffer data
* \param[in] size: Size of `buffdata` in units of bytes
* Maximum number of bytes buffer can hold is `size - 1`
* \return `1` on success, `0` otherwise
*/
uint8_t
lwrb_init(LWRB_VOLATILE lwrb_t* buff, void* buffdata, size_t size) {
if (buff == NULL || buffdata == NULL || size == 0) {
return 0;
}
BUF_MEMSET((void*)buff, 0x00, sizeof(*buff));
buff->size = size;
buff->buff = buffdata;
#if LWRB_USE_MAGIC
buff->magic1 = 0xDEADBEEF;
buff->magic2 = ~0xDEADBEEF;
#endif /* LWRB_USE_MAGIC */
return 1;
}
/**
* \brief Check if buff is initialized and ready to use
* \param[in] buff: Buffer handle
* \return `1` if ready, `0` otherwise
*/
uint8_t
lwrb_is_ready(LWRB_VOLATILE lwrb_t* buff) {
return BUF_IS_VALID(buff);
}
/**
* \brief Free buffer memory
* \note Since implementation does not use dynamic allocation,
* it just sets buffer handle to `NULL`
* \param[in] buff: Buffer handle
*/
void
lwrb_free(LWRB_VOLATILE lwrb_t* buff) {
if (BUF_IS_VALID(buff)) {
buff->buff = NULL;
}
}
/**
* \brief Set event function callback for different buffer operations
* \param[in] buff: Buffer handle
* \param[in] evt_fn: Callback function
*/
void
lwrb_set_evt_fn(LWRB_VOLATILE lwrb_t* buff, lwrb_evt_fn evt_fn) {
if (BUF_IS_VALID(buff)) {
buff->evt_fn = evt_fn;
}
}
/**
* \brief Write data to buffer.
* Copies data from `data` array to buffer and marks buffer as full for maximum `btw` number of bytes
*
* \param[in] buff: Buffer handle
* \param[in] data: Pointer to data to write into buffer
* \param[in] btw: Number of bytes to write
* \return Number of bytes written to buffer.
* When returned value is less than `btw`, there was no enough memory available
* to copy full data array
*/
size_t
lwrb_write(LWRB_VOLATILE lwrb_t* buff, const void* data, size_t btw) {
size_t tocopy, free;
const uint8_t* d = data;
if (!BUF_IS_VALID(buff) || data == NULL || btw == 0) {
return 0;
}
/* Calculate maximum number of bytes available to write */
free = lwrb_get_free(buff);
btw = BUF_MIN(free, btw);
if (btw == 0) {
return 0;
}
/* Step 1: Write data to linear part of buffer */
tocopy = BUF_MIN(buff->size - buff->w, btw);
BUF_MEMCPY(&buff->buff[buff->w], d, tocopy);
buff->w += tocopy;
btw -= tocopy;
/* Step 2: Write data to beginning of buffer (overflow part) */
if (btw > 0) {
BUF_MEMCPY(buff->buff, &d[tocopy], btw);
buff->w = btw;
}
/* Step 3: Check end of buffer */
if (buff->w >= buff->size) {
buff->w = 0;
}
BUF_SEND_EVT(buff, LWRB_EVT_WRITE, tocopy + btw);
return tocopy + btw;
}
/**
* \brief Read data from buffer.
* Copies data from buffer to `data` array and marks buffer as free for maximum `btr` number of bytes
*
* \param[in] buff: Buffer handle
* \param[out] data: Pointer to output memory to copy buffer data to
* \param[in] btr: Number of bytes to read
* \return Number of bytes read and copied to data array
*/
size_t
lwrb_read(LWRB_VOLATILE lwrb_t* buff, void* data, size_t btr) {
size_t tocopy, full;
uint8_t* d = data;
if (!BUF_IS_VALID(buff) || data == NULL || btr == 0) {
return 0;
}
/* Calculate maximum number of bytes available to read */
full = lwrb_get_full(buff);
btr = BUF_MIN(full, btr);
if (btr == 0) {
return 0;
}
/* Step 1: Read data from linear part of buffer */
tocopy = BUF_MIN(buff->size - buff->r, btr);
BUF_MEMCPY(d, &buff->buff[buff->r], tocopy);
buff->r += tocopy;
btr -= tocopy;
/* Step 2: Read data from beginning of buffer (overflow part) */
if (btr > 0) {
BUF_MEMCPY(&d[tocopy], buff->buff, btr);
buff->r = btr;
}
/* Step 3: Check end of buffer */
if (buff->r >= buff->size) {
buff->r = 0;
}
BUF_SEND_EVT(buff, LWRB_EVT_READ, tocopy + btr);
return tocopy + btr;
}
/**
* \brief Read from buffer without changing read pointer (peek only)
* \param[in] buff: Buffer handle
* \param[in] skip_count: Number of bytes to skip before reading data
* \param[out] data: Pointer to output memory to copy buffer data to
* \param[in] btp: Number of bytes to peek
* \return Number of bytes peeked and written to output array
*/
size_t
lwrb_peek(LWRB_VOLATILE lwrb_t* buff, size_t skip_count, void* data, size_t btp) {
size_t full, tocopy, r;
uint8_t* d = data;
if (!BUF_IS_VALID(buff) || data == NULL || btp == 0) {
return 0;
}
r = buff->r;
/* Calculate maximum number of bytes available to read */
full = lwrb_get_full(buff);
/* Skip beginning of buffer */
if (skip_count >= full) {
return 0;
}
r += skip_count;
full -= skip_count;
if (r >= buff->size) {
r -= buff->size;
}
/* Check maximum number of bytes available to read after skip */
btp = BUF_MIN(full, btp);
if (btp == 0) {
return 0;
}
/* Step 1: Read data from linear part of buffer */
tocopy = BUF_MIN(buff->size - r, btp);
BUF_MEMCPY(d, &buff->buff[r], tocopy);
btp -= tocopy;
/* Step 2: Read data from beginning of buffer (overflow part) */
if (btp > 0) {
BUF_MEMCPY(&d[tocopy], buff->buff, btp);
}
return tocopy + btp;
}
/**
* \brief Get available size in buffer for write operation
* \param[in] buff: Buffer handle
* \return Number of free bytes in memory
*/
size_t
lwrb_get_free(LWRB_VOLATILE lwrb_t* buff) {
size_t size, w, r;
if (!BUF_IS_VALID(buff)) {
return 0;
}
/* Use temporary values in case they are changed during operations */
w = buff->w;
r = buff->r;
if (w == r) {
size = buff->size;
} else if (r > w) {
size = r - w;
} else {
size = buff->size - (w - r);
}
/* Buffer free size is always 1 less than actual size */
return size - 1;
}
/**
* \brief Get number of bytes currently available in buffer
* \param[in] buff: Buffer handle
* \return Number of bytes ready to be read
*/
size_t
lwrb_get_full(LWRB_VOLATILE lwrb_t* buff) {
size_t w, r, size;
if (!BUF_IS_VALID(buff)) {
return 0;
}
/* Use temporary values in case they are changed during operations */
w = buff->w;
r = buff->r;
if (w == r) {
size = 0;
} else if (w > r) {
size = w - r;
} else {
size = buff->size - (r - w);
}
return size;
}
/**
* \brief Resets buffer to default values. Buffer size is not modified
* \param[in] buff: Buffer handle
*/
void
lwrb_reset(LWRB_VOLATILE lwrb_t* buff) {
if (BUF_IS_VALID(buff)) {
buff->w = 0;
buff->r = 0;
BUF_SEND_EVT(buff, LWRB_EVT_RESET, 0);
}
}
/**
* \brief Get linear address for buffer for fast read
* \param[in] buff: Buffer handle
* \return Linear buffer start address
*/
void*
lwrb_get_linear_block_read_address(LWRB_VOLATILE lwrb_t* buff) {
if (!BUF_IS_VALID(buff)) {
return NULL;
}
return &buff->buff[buff->r];
}
/**
* \brief Get length of linear block address before it overflows for read operation
* \param[in] buff: Buffer handle
* \return Linear buffer size in units of bytes for read operation
*/
size_t
lwrb_get_linear_block_read_length(LWRB_VOLATILE lwrb_t* buff) {
size_t w, r, len;
if (!BUF_IS_VALID(buff)) {
return 0;
}
/* Use temporary values in case they are changed during operations */
w = buff->w;
r = buff->r;
if (w > r) {
len = w - r;
} else if (r > w) {
len = buff->size - r;
} else {
len = 0;
}
return len;
}
/**
* \brief Skip (ignore; advance read pointer) buffer data
* Marks data as read in the buffer and increases free memory for up to `len` bytes
*
* \note Useful at the end of streaming transfer such as DMA
* \param[in] buff: Buffer handle
* \param[in] len: Number of bytes to skip and mark as read
* \return Number of bytes skipped
*/
size_t
lwrb_skip(LWRB_VOLATILE lwrb_t* buff, size_t len) {
size_t full;
if (!BUF_IS_VALID(buff) || len == 0) {
return 0;
}
full = lwrb_get_full(buff);
len = BUF_MIN(len, full);
buff->r += len;
if (buff->r >= buff->size) {
buff->r -= buff->size;
}
BUF_SEND_EVT(buff, LWRB_EVT_READ, len);
return len;
}
/**
* \brief Get linear address for buffer for fast read
* \param[in] buff: Buffer handle
* \return Linear buffer start address
*/
void*
lwrb_get_linear_block_write_address(LWRB_VOLATILE lwrb_t* buff) {
if (!BUF_IS_VALID(buff)) {
return NULL;
}
return &buff->buff[buff->w];
}
/**
* \brief Get length of linear block address before it overflows for write operation
* \param[in] buff: Buffer handle
* \return Linear buffer size in units of bytes for write operation
*/
size_t
lwrb_get_linear_block_write_length(LWRB_VOLATILE lwrb_t* buff) {
size_t w, r, len;
if (!BUF_IS_VALID(buff)) {
return 0;
}
/* Use temporary values in case they are changed during operations */
w = buff->w;
r = buff->r;
if (w >= r) {
len = buff->size - w;
/*
* When read pointer is 0,
* maximal length is one less as if too many bytes
* are written, buffer would be considered empty again (r == w)
*/
if (r == 0) {
/*
* Cannot overflow:
* - If r is not 0, statement does not get called
* - buff->size cannot be 0 and if r is 0, len is greater 0
*/
--len;
}
} else {
len = r - w - 1;
}
return len;
}
/**
* \brief Advance write pointer in the buffer.
* Similar to skip function but modifies write pointer instead of read
*
* \note Useful when hardware is writing to buffer and application needs to increase number
* of bytes written to buffer by hardware
* \param[in] buff: Buffer handle
* \param[in] len: Number of bytes to advance
* \return Number of bytes advanced for write operation
*/
size_t
lwrb_advance(LWRB_VOLATILE lwrb_t* buff, size_t len) {
size_t free;
if (!BUF_IS_VALID(buff) || len == 0) {
return 0;
}
free = lwrb_get_free(buff);
len = BUF_MIN(len, free);
buff->w += len;
if (buff->w >= buff->size) {
buff->w -= buff->size;
}
BUF_SEND_EVT(buff, LWRB_EVT_WRITE, len);
return len;
}

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/**
* \file lwrb.h
* \brief LwRB - Lightweight ring buffer
*/
/*
* Copyright (c) 2020 Tilen MAJERLE
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* This file is part of LwRB - Lightweight ring buffer library.
*
* Author: Tilen MAJERLE <tilen@majerle.eu>
* Version: v2.0.0
*/
#ifndef LWRB_HDR_H
#define LWRB_HDR_H
#include <string.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* \defgroup LWRB Lightweight ring buffer manager
* \brief Lightweight ring buffer manager
* \{
*/
/**
* \brief Enable buffer structure pointer parameter as volatile
* To use this feature, uncomment keyword below
*/
#define LWRB_VOLATILE /* volatile */
/**
* \brief Adds 2 magic words to make sure if memory is corrupted
* application can detect wrong data pointer and maximum size
*/
#define LWRB_USE_MAGIC 1
/**
* \brief Event type for buffer operations
*/
typedef enum {
LWRB_EVT_READ, /*!< Read event */
LWRB_EVT_WRITE, /*!< Write event */
LWRB_EVT_RESET, /*!< Reset event */
} lwrb_evt_type_t;
/**
* \brief Buffer structure forward declaration
*/
struct lwrb;
/**
* \brief Event callback function type
* \param[in] buff: Buffer handle for event
* \param[in] evt: Event type
* \param[in] bp: Number of bytes written or read (when used), depends on event type
*/
typedef void (*lwrb_evt_fn)(LWRB_VOLATILE struct lwrb* buff, lwrb_evt_type_t evt, size_t bp);
/**
* \brief Buffer structure
*/
typedef struct lwrb {
#if LWRB_USE_MAGIC
uint32_t magic1; /*!< Magic 1 word */
#endif /* LWRB_USE_MAGIC */
uint8_t* buff; /*!< Pointer to buffer data.
Buffer is considered initialized when `buff != NULL` and `size > 0` */
size_t size; /*!< Size of buffer data. Size of actual buffer is `1` byte less than value holds */
size_t r; /*!< Next read pointer. Buffer is considered empty when `r == w` and full when `w == r - 1` */
size_t w; /*!< Next write pointer. Buffer is considered empty when `r == w` and full when `w == r - 1` */
lwrb_evt_fn evt_fn; /*!< Pointer to event callback function */
#if LWRB_USE_MAGIC
uint32_t magic2; /*!< Magic 2 word */
#endif /* LWRB_USE_MAGIC */
} lwrb_t;
uint8_t lwrb_init(LWRB_VOLATILE lwrb_t* buff, void* buffdata, size_t size);
uint8_t lwrb_is_ready(LWRB_VOLATILE lwrb_t* buff);
void lwrb_free(LWRB_VOLATILE lwrb_t* buff);
void lwrb_reset(LWRB_VOLATILE lwrb_t* buff);
void lwrb_set_evt_fn(LWRB_VOLATILE lwrb_t* buff, lwrb_evt_fn fn);
/* Read/Write functions */
size_t lwrb_write(LWRB_VOLATILE lwrb_t* buff, const void* data, size_t btw);
size_t lwrb_read(LWRB_VOLATILE lwrb_t* buff, void* data, size_t btr);
size_t lwrb_peek(LWRB_VOLATILE lwrb_t* buff, size_t skip_count, void* data, size_t btp);
/* Buffer size information */
size_t lwrb_get_free(LWRB_VOLATILE lwrb_t* buff);
size_t lwrb_get_full(LWRB_VOLATILE lwrb_t* buff);
/* Read data block management */
void* lwrb_get_linear_block_read_address(LWRB_VOLATILE lwrb_t* buff);
size_t lwrb_get_linear_block_read_length(LWRB_VOLATILE lwrb_t* buff);
size_t lwrb_skip(LWRB_VOLATILE lwrb_t* buff, size_t len);
/* Write data block management */
void* lwrb_get_linear_block_write_address(LWRB_VOLATILE lwrb_t* buff);
size_t lwrb_get_linear_block_write_length(LWRB_VOLATILE lwrb_t* buff);
size_t lwrb_advance(LWRB_VOLATILE lwrb_t* buff, size_t len);
/**
* \}
*/
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LWRB_HDR_H */

1
lib/nanopb Submodule

Submodule lib/nanopb added at 1f0c2e19c6

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/**
* @file CBSP_AsyncComm.c
* @author owalter
* @brief Continuus receive UART-driver based on circular DMA
* @version 0.1
* @date 28.11.2022
*
* driver based on example imlementation of https://github.com/MaJerle/stm32-usart-uart-dma-rx-tx
*
* @copyright Copyright © 2022 habemus! electronic + transfer GmbH. All rights reserved.
*/
#include "AsyncComm.h"
#include "stm32h7xx_ll_dma.h"
#include "stm32h7xx_ll_usart.h"
#ifndef USE_HAL_DRIVER
#include "stm32l4xx_ll_gpio.h"
#endif
void usart_rx_check(const uart_desc_t* uart);
void usart_process_data(const uart_desc_t* uart, const void* data, size_t len);
void usart_send_string(const uart_desc_t* uart, const char* str);
/**
* \brief USART DMA check thread
* \param[in] arg: Thread argument
*/
_Noreturn void usart_rx_dma_thread(void* arg) {
uart_desc_t* uart = arg;
void* d;
/* Notify user to start sending data */
// usart_send_string(uart, "USART DMA example: DMA HT & TC + USART IDLE LINE IRQ + RTOS processing\r\n");
// usart_send_string(uart, "Start sending data to STM32\r\n");
while (1) {
/* Block thread and wait for event to process USART data */
osMessageQueueGet(uart->data->queue, &d, NULL, osWaitForever);
/* Simply call processing function */
usart_rx_check(uart);
(void)d;
}
}
/**
* \brief Check for new data received with DMA
*
* User must select context to call this function from:
* - Only interrupts (DMA HT, DMA TC, UART IDLE) with same preemption priority level
* - Only thread context (outside interrupts)
*
* If called from both context-es, exclusive access protection must be implemented
* This mode is not advised as it usually means architecture design problems
*
* When IDLE interrupt is not present, application must rely only on thread context,
* by manually calling function as quickly as possible, to make sure
* data are read from raw buffer and processed.
*
* Not doing reads fast enough may cause DMA to overflow unread received bytes,
* hence application will lost useful data.
*
* Solutions to this are:
* - Improve architecture design to achieve faster reads
* - Increase raw buffer size and allow DMA to write more data before this function is called
*/
void usart_rx_check(const uart_desc_t* uart) {
size_t pos;
/* Calculate current position in buffer and check for new data available */
pos = ARRAY_LEN(uart->data->dma_rx_buffer) - LL_DMA_GetDataLength(uart->dma_rx, uart->dma_rx_ch);
if (pos != uart->data->old_pos) { /* Check change in received data */
if (pos > uart->data->old_pos) { /* Current position is over previous one */
/*
* Processing is done in "linear" mode.
*
* Application processing is fast with single data block,
* length is simply calculated by subtracting pointers
*
* [ 0 ]
* [ 1 ] <- old_pos |------------------------------------|
* [ 2 ] | |
* [ 3 ] | Single block (len = pos - old_pos) |
* [ 4 ] | |
* [ 5 ] |------------------------------------|
* [ 6 ] <- pos
* [ 7 ]
* [ N - 1 ]
*/
usart_process_data(uart, &uart->data->dma_rx_buffer[uart->data->old_pos], pos - uart->data->old_pos);
} else {
/*
* Processing is done in "overflow" mode..
*
* Application must process data twice,
* since there are 2 linear memory blocks to handle
*
* [ 0 ] |---------------------------------|
* [ 1 ] | Second block (len = pos) |
* [ 2 ] |---------------------------------|
* [ 3 ] <- pos
* [ 4 ] <- old_pos |---------------------------------|
* [ 5 ] | |
* [ 6 ] | First block (len = N - old_pos) |
* [ 7 ] | |
* [ N - 1 ] |---------------------------------|
*/
usart_process_data(uart, &uart->data->dma_rx_buffer[uart->data->old_pos],
ARRAY_LEN(uart->data->dma_rx_buffer) - uart->data->old_pos);
if (pos > 0) {
usart_process_data(uart, &uart->data->dma_rx_buffer[0], pos);
}
}
uart->data->old_pos = pos; /* Save current position as old for next transfers */
}
}
/**
* \brief Check if DMA is active and if not try to send data
* \return `1` if transfer just started, `0` if on-going or no data to transmit
*/
uint8_t usart_start_tx_dma_transfer(const uart_desc_t* uart) {
uint32_t primask;
uint8_t started = 0;
/*
* First check if transfer is currently in-active,
* by examining the value of usart_tx_dma_current_len variable.
*
* This variable is set before DMA transfer is started and cleared in DMA TX complete interrupt.
*
* It is not necessary to disable the interrupts before checking the variable:
*
* When usart_tx_dma_current_len == 0
* - This function is called by either application or TX DMA interrupt
* - When called from interrupt, it was just reset before the call,
* indicating transfer just completed and ready for more
* - When called from an application, transfer was previously already in-active
* and immediate call from interrupt cannot happen at this moment
*
* When usart_tx_dma_current_len != 0
* - This function is called only by an application.
* - It will never be called from interrupt with usart_tx_dma_current_len != 0 condition
*
* Disabling interrupts before checking for next transfer is advised
* only if multiple operating system threads can access to this function w/o
* exclusive access protection (mutex) configured,
* or if application calls this function from multiple interrupts.
*
* This example assumes worst use case scenario,
* hence interrupts are disabled prior every check
*/
primask = __get_PRIMASK();
__disable_irq();
if (uart->data->tx_dma_current_len == 0 &&
(uart->data->tx_dma_current_len = lwrb_get_linear_block_read_length(&uart->data->tx_rb)) > 0) {
/* Disable channel if enabled */
LL_DMA_DisableStream(uart->dma_tx, uart->dma_tx_ch);
/* Clear all flags */
uart->dma_tx_clear_tc_fn(uart->dma_tx);
uart->dma_tx_clear_ht_fn(uart->dma_tx);
uart->dma_tx_clear_gi_fn(uart->dma_tx);
uart->dma_tx_clear_te_fn(uart->dma_tx);
uart->dma_tx_clear_fe_fn(uart->dma_tx);
/* Prepare DMA data and length */
LL_DMA_SetDataLength(uart->dma_tx, uart->dma_tx_ch, uart->data->tx_dma_current_len);
LL_DMA_SetMemoryAddress(uart->dma_tx, uart->dma_tx_ch,
(uint32_t)lwrb_get_linear_block_read_address(&uart->data->tx_rb));
/* Start transfer */
LL_DMA_EnableStream(uart->dma_tx, uart->dma_tx_ch);
uart->data->tx_running = 1;
started = 1;
}
__set_PRIMASK(primask);
return started;
}
/**
* \brief Process received data over UART
* \note Either process them directly or copy to other bigger buffer
* \param[in] data: Data to process
* \param[in] len: Length in units of bytes
*/
void usart_process_data(const uart_desc_t* uart, const void* data, size_t len) {
/*
* This function is called on DMA TC or HT events, and on UART IDLE (if enabled) event.
*/
uart->uart_external_receive_callback(data, len);
}
/**
* \brief Send data over UART
* \note copy data into ringbuffer and trigger UART transmission
* \param[in] data: Data to process
* \param[in] len: Length in units of bytes
*/
void usart_send_data(const uart_desc_t* uart, const void* data, size_t len) {
lwrb_write(&uart->data->tx_rb, data, len); /* Write data to TX buffer */
usart_start_tx_dma_transfer(uart); /* Then try to start transfer */
}
/**
* \brief Send string to USART
* \param[in] str: String to send
*/
void usart_send_string(const uart_desc_t* uart, const char* str) {
lwrb_write(&uart->data->tx_rb, str, strnlen(str, 255)); /* Write data to TX buffer for loopback */
usart_start_tx_dma_transfer(uart); /* Then try to start transfer */
}
/**
* \brief USART DMA Initialization Function
* other init is handled by MX_HAL
*/
osThreadId_t usart_init(const uart_desc_t* uart, const osThreadAttr_t* attr) {
#ifndef USE_HAL_DRIVER
LL_USART_InitTypeDef USART_InitStruct = { 0 };
LL_GPIO_InitTypeDef GPIO_InitStruct = { 0 };
/* USART GPIO Configuration */
/* RX pin */
GPIO_InitStruct.Pin = uart->uart_rx_pin;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = uart->uart_rx_pin_af;
LL_GPIO_Init(uart->uart_rx_port, &GPIO_InitStruct);
/* Optional TX pin */
if (uart->uart_tx_port != NULL) {
GPIO_InitStruct.Pin = uart->uart_tx_pin;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = uart->uart_tx_pin_af;
LL_GPIO_Init(uart->uart_tx_port, &GPIO_InitStruct);
}
#endif
/* USART RX DMA init */
#ifndef USE_HAL_DRIVER
LL_DMA_SetPeriphRequest(uart->dma_rx, uart->dma_rx_ch, uart->dma_rx, uart->dma_rx_req);
LL_DMA_SetDataTransferDirection(uart->dma_rx, uart->dma_rx_ch, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
LL_DMA_SetChannelPriorityLevel(uart->dma_rx, uart->dma_rx_ch, LL_DMA_PRIORITY_LOW);
LL_DMA_SetMode(uart->dma_rx, uart->dma_rx_ch, LL_DMA_MODE_NORMAL);
LL_DMA_SetPeriphIncMode(uart->dma_rx, uart->dma_rx_ch, LL_DMA_PERIPH_NOINCREMENT);
LL_DMA_SetMemoryIncMode(uart->dma_rx, uart->dma_rx_ch, LL_DMA_MEMORY_INCREMENT);
LL_DMA_SetPeriphSize(uart->dma_rx, uart->dma_rx_ch, LL_DMA_PDATAALIGN_BYTE);
LL_DMA_SetMemorySize(uart->dma_rx, uart->dma_rx_ch, LL_DMA_MDATAALIGN_BYTE);
#endif
LL_DMA_SetPeriphAddress(uart->dma_rx, uart->dma_rx_ch,
LL_USART_DMA_GetRegAddr(uart->uart, LL_USART_DMA_REG_DATA_RECEIVE));
LL_DMA_SetMemoryAddress(uart->dma_rx, uart->dma_rx_ch, (uint32_t)uart->data->dma_rx_buffer);
LL_DMA_SetDataLength(uart->dma_rx, uart->dma_rx_ch, ARRAY_LEN(uart->data->dma_rx_buffer));
/* USART TX DMA init */
#ifndef USE_HAL_DRIVER
LL_DMA_SetPeriphRequest(uart->dma_tx, uart->dma_tx_ch, uart->dma_tx, uart->dma_tx_req);
LL_DMA_SetDataTransferDirection(uart->dma_tx, uart->dma_tx_ch, LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
LL_DMA_SetChannelPriorityLevel(uart->dma_tx, uart->dma_tx_ch, LL_DMA_PRIORITY_LOW);
LL_DMA_SetMode(uart->dma_tx, uart->dma_tx_ch, LL_DMA_MODE_NORMAL);
LL_DMA_SetPeriphIncMode(uart->dma_tx, uart->dma_tx_ch, LL_DMA_PERIPH_NOINCREMENT);
LL_DMA_SetMemoryIncMode(uart->dma_tx, uart->dma_tx_ch, LL_DMA_MEMORY_INCREMENT);
LL_DMA_SetPeriphSize(uart->dma_tx, uart->dma_tx_ch, LL_DMA_PDATAALIGN_BYTE);
LL_DMA_SetMemorySize(uart->dma_tx, uart->dma_tx_ch, LL_DMA_MDATAALIGN_BYTE);
#endif
LL_DMA_SetPeriphAddress(uart->dma_tx, uart->dma_tx_ch,
LL_USART_DMA_GetRegAddr(uart->uart, LL_USART_DMA_REG_DATA_TRANSMIT));
/* Enable HT & TC interrupts */
LL_DMA_EnableIT_HT(uart->dma_rx, uart->dma_rx_ch);
LL_DMA_EnableIT_TC(uart->dma_rx, uart->dma_rx_ch);
/* Enable TC interrupts for TX */
LL_DMA_EnableIT_TC(uart->dma_tx, uart->dma_tx_ch);
/* DMA interrupt init */
#ifndef USE_HAL_DRIVER
NVIC_SetPriority(uart->dma_irq_rx, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), uart->prio, 0));
NVIC_EnableIRQ(uart->dma_irq_rx);
NVIC_SetPriority(uart->dma_irq_tx, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), uart->prio, 0));
NVIC_EnableIRQ(uart->dma_irq_tx);
#endif
/* USART configuration */
#ifndef USE_HAL_DRIVER
USART_InitStruct.BaudRate = uart->uart_baudrate;
USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
USART_InitStruct.Parity = LL_USART_PARITY_NONE;
USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
LL_USART_Init(uart->uart, &USART_InitStruct);
LL_USART_ConfigAsyncMode(uart->uart);
#endif
LL_USART_Disable(uart->uart);
LL_USART_EnableDMAReq_RX(uart->uart);
LL_USART_EnableDMAReq_TX(uart->uart);
LL_USART_EnableIT_IDLE(uart->uart);
/* USART interrupt */
#ifndef USE_HAL_DRIVER
NVIC_SetPriority(uart->uart_irq, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), uart->prio, 1));
NVIC_EnableIRQ(uart->uart_irq);
#endif
/* Create message queue before enabling UART or DMA */
/* This is to make sure message queue is ready before UART/DMA interrupts are enabled */
uart->data->queue = osMessageQueueNew(10, sizeof(void*), NULL);
/*init tx ringbuffer*/
lwrb_init(&uart->data->tx_rb, uart->data->tx_rb_data, sizeof(uart->data->tx_rb_data));
/* Enable USART and DMA */
LL_DMA_EnableStream(uart->dma_rx, uart->dma_rx_ch);
LL_USART_Enable(uart->uart);
/* Create new thread for USART RX DMA processing */
return osThreadNew(usart_rx_dma_thread, (void*)uart, attr);
}
/**
* \brief General purpose DMA interrupt handler
* \note Function must be called from DMA interrupt
*
* It handles half-transfer and transfer-cmakecomplete interrupts and does the job accordingly
*
* must be called from the IT function with the correct context pointer
*
* \param[in] uart: Uart description to handle
*/
void usart_dma_irq_handler(const uart_desc_t* uart) {
void* d = (void*)1;
/* Check half-transfer complete interrupt */
if (LL_DMA_IsEnabledIT_HT(uart->dma_rx, uart->dma_rx_ch) && uart->dma_rx_is_ht_fn(uart->dma_rx)) {
uart->dma_rx_clear_ht_fn(uart->dma_rx); /* Clear half-transfer complete flag */
osMessageQueuePut(uart->data->queue, &d, 0, 0); /* Write data to queue. Do not use wait function! */
}
/* Check transfer-complete interrupt */
if (LL_DMA_IsEnabledIT_TC(uart->dma_rx, uart->dma_rx_ch) && uart->dma_rx_is_tc_fn(uart->dma_rx)) {
uart->dma_rx_clear_tc_fn(uart->dma_rx); /* Clear transfer complete flag */
osMessageQueuePut(uart->data->queue, &d, 0, 0); /* Write data to queue. Do not use wait function! */
}
}
/// must be called from the IT function with the correct context pointer
void usart_dma_irq_handler_tx(const uart_desc_t* uart) {
/* Check transfer-complete interrupt */
if (LL_DMA_IsEnabledIT_TC(uart->dma_tx, uart->dma_tx_ch) && uart->dma_tx_is_tc_fn(uart->dma_tx)) {
uart->dma_tx_clear_tc_fn(uart->dma_tx);
/* Clear transfer complete flag */
lwrb_skip(&uart->data->tx_rb,
uart->data->tx_dma_current_len); /* Skip buffer, it has been successfully sent out */
uart->data->tx_dma_current_len = 0; /* Reset data length */
uart->data->tx_running = 0;
usart_start_tx_dma_transfer(uart); /* Start new transfer */
}
}
/**
* \brief General purpose UART interrupt handler
* \note Function must be called from UART interrupt
*
* It handles IDLE line detection interrupt and does the job accordingly
*
* must be called from the IT function with the correct context pointer
*
* \param[in] uart: Uart description to handle
*/
void usart_irq_handler(const uart_desc_t* uart) {
void* d = (void*)1;
/* Check for IDLE line interrupt */
if (LL_USART_IsEnabledIT_IDLE(uart->uart) && LL_USART_IsActiveFlag_IDLE(uart->uart)) {
LL_USART_ClearFlag_IDLE(uart->uart); /* Clear IDLE line flag */
osMessageQueuePut(uart->data->queue, &d, 0, 0); /* Write data to queue. Do not use wait function! */
}
}

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/**
* @file CBSP_AsyncComm.h
* @author owalter
* @brief
* @version 0.1
* @date 28.11.2022
*
* @copyright Copyright © 2022 habemus! electronic + transfer GmbH. All rights reserved.
*/
#ifndef NUN10K22_DISPLAY_CBSP_ASYNCCOMM_H
#define NUN10K22_DISPLAY_CBSP_ASYNCCOMM_H
#include <stdint.h>
#include "cmsis_os.h"
#include "lwrb.h"
#include "main.h"
typedef void (*data_receive_callback)(const void* data, size_t len);
typedef void (*char_receive_callback)(const char* str, size_t len);
typedef void (*bytes_receive_callback)(const uint8_t* str, size_t len);
/**
* \brief Volatile data structure
*
* Variables declared using this structure can not be put to non-volatile memory (such as flash, EEPROM, ..)
*/
typedef struct {
/* OS queue */
osMessageQueueId_t queue; /*!< Message queue */
/* Raw data buffer */
uint8_t dma_rx_buffer[1024]; /*!< DMA buffer for receive data */
size_t old_pos; /*!< Position for data */
/* Tx data buffer */
volatile size_t tx_dma_current_len;
volatile uint8_t tx_running;
lwrb_t tx_rb;
uint8_t tx_rb_data[512];
} uart_desc_volatile_t;
/**
* \brief Non-Volatile data structure
*
* Variables declared using this structure may be put to non-volative memory.
* This is to avoid using RAM for constant data
*/
typedef struct {
/* UART config */
USART_TypeDef* uart; /*!< UART/USART/LPUART instance */
#ifndef USE_HAL_DRIVER
GPIO_TypeDef* uart_tx_port;
GPIO_TypeDef* uart_rx_port;
uint16_t uart_tx_pin;
uint16_t uart_rx_pin;
uint16_t uart_tx_pin_af;
uint16_t uart_rx_pin_af;
/* Interrupts config */
uint8_t prio; /*!< Preemption priority number */
IRQn_Type uart_irq; /*!< UART IRQ instance */
IRQn_Type dma_irq_rx; /*!< DMA IRQ RX instance */
IRQn_Type dma_irq_tx; /*!< DMA IRQ TX instance */
/* DMA config & flags management */
uint32_t dma_rx_req; /*!< RX DMA request */
uint32_t dma_tx_req; /*!< TX DMA request */
#endif
DMA_TypeDef* dma_rx; /*!< RX DMA instance */
uint32_t dma_rx_ch; /*!< RX DMA channel */
void (*dma_rx_clear_tc_fn)(DMA_TypeDef*);
void (*dma_rx_clear_ht_fn)(DMA_TypeDef*);
uint32_t (*dma_rx_is_tc_fn)(DMA_TypeDef*);
uint32_t (*dma_rx_is_ht_fn)(DMA_TypeDef*);
DMA_TypeDef* dma_tx; /*!< TX DMA instance */
uint32_t dma_tx_ch; /*!< TX DMA channel */
void (*dma_tx_clear_tc_fn)(DMA_TypeDef*);
uint32_t (*dma_tx_is_tc_fn)(DMA_TypeDef*);
void (*dma_tx_clear_ht_fn)(DMA_TypeDef*);
void (*dma_tx_clear_gi_fn)(DMA_TypeDef*);
void (*dma_tx_clear_te_fn)(DMA_TypeDef*);
void (*dma_tx_clear_fe_fn)(DMA_TypeDef*);
uart_desc_volatile_t* data; /*!< Pointer to volatile data */
/* receive callback */
data_receive_callback uart_external_receive_callback;
} uart_desc_t;
/* USART related functions */
osThreadId_t usart_init(const uart_desc_t* uart, const osThreadAttr_t* attr);
void usart_dma_irq_handler(const uart_desc_t* uart);
void usart_dma_irq_handler_tx(const uart_desc_t* uart);
void usart_irq_handler(const uart_desc_t* uart);
void usart_send_data(const uart_desc_t* uart, const void* data, size_t len);
/**
* \brief Calculate length of statically allocated array
*/
#define ARRAY_LEN(x) (sizeof(x) / sizeof((x)[0]))
#endif // NUN10K22_DISPLAY_CBSP_ASYNCCOMM_H

5
lib/uart_driver/AsyncFrames.c Normal file
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//
// Created by oliver on 12/8/23.
//
#include "AsyncFrames.h"

17
lib/uart_driver/AsyncFrames.h Normal file
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//
// Created by oliver on 12/8/23.
//
#ifndef MASTERCOMMISION_ASYNCFAMES_H
#define MASTERCOMMISION_ASYNCFAMES_H
#include "stdint.h"
typedef struct AsyncFrameHeader_s {
uint16_t sof;
uint16_t leng;
} AsyncFrameHeader_t;
#endif //MASTERCOMMISION_ASYNCFAMES_H

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lib/uart_driver/CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.12)
project(uart_driver C)
add_library(${PROJECT_NAME} "")
target_sources(${PROJECT_NAME}
PRIVATE
${CMAKE_CURRENT_LIST_DIR}/AsyncComm.c
${CMAKE_CURRENT_LIST_DIR}/AsyncFrames.c
INTERFACE
${CMAKE_CURRENT_LIST_DIR}/AsyncComm.h
${CMAKE_CURRENT_LIST_DIR}/AsyncFrames.h
)
target_include_directories(${PROJECT_NAME}
INTERFACE
${CMAKE_CURRENT_LIST_DIR}
)
target_link_libraries(${PROJECT_NAME} PUBLIC lwrb)

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lib/uart_driver/main.c Normal file
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/*
* This example shows how application can implement RX and TX DMA for UART.
* It uses simple packet example approach and 3 separate buffers:
*
* - Raw DMA RX buffer where DMA transfers data from UART to memory
* - Ringbuff for RX data which are transfered from raw buffer and ready for application processin
* - Ringbuff for TX data to be sent out by DMA TX
*/
/* Includes */
#include "main.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "lwrb.h"
/* Private function prototypes */
void SystemClock_Config(void);
/* USART related functions */
void usart_init(void);
void usart_rx_check(void);
void usart_process_data(const void* data, size_t len);
void usart_send_string(const char* str);
uint8_t usart_start_tx_dma_transfer(void);
/**
* \brief Calculate length of statically allocated array
*/
#define ARRAY_LEN(x) (sizeof(x) / sizeof((x)[0]))
/**
* \brief USART RX buffer for DMA to transfer every received byte RX
* \note Contains raw data that are about to be processed by different events
*
* Special use case for STM32H7 series.
* Default memory configuration in STM32H7 may put variables to DTCM RAM,
* part of memory that is super fast, however DMA has no access to it.
*
* For this specific example, all variables are by default
* configured in D1 RAM. This is configured in linker script
*/
uint8_t
usart_rx_dma_buffer[64];
/**
* \brief Ring buffer instance for TX data
*/
lwrb_t
usart_rx_rb;
/**
* \brief Ring buffer data array for RX DMA
*/
uint8_t
usart_rx_rb_data[128];
/**
* \brief Ring buffer instance for TX data
*/
lwrb_t
usart_tx_rb;
/**
* \brief Ring buffer data array for TX DMA
*/
uint8_t
usart_tx_rb_data[128];
/**
* \brief Length of currently active TX DMA transfer
*/
volatile size_t
usart_tx_dma_current_len;
/**
* \brief Application entry point
*/
int
main(void) {
uint8_t state, cmd, len;
/* MCU Configuration */
// SCB_DisableDCache();
// SCB_DisableICache();
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
LL_APB4_GRP1_EnableClock(LL_APB4_GRP1_PERIPH_SYSCFG);
/* Configure the system clock */
SystemClock_Config();
/* Initialize ringbuff for TX & RX */
lwrb_init(&usart_tx_rb, usart_tx_rb_data, sizeof(usart_tx_rb_data));
lwrb_init(&usart_rx_rb, usart_rx_rb_data, sizeof(usart_rx_rb_data));
/* Initialize all configured peripherals */
usart_init();
usart_send_string("USART DMA example: DMA HT & TC + USART IDLE LINE interrupts\r\n");
usart_send_string("Start sending data to STM32\r\n");
/* After this point, do not use usart_send_string function anymore */
/* Send packet data over UART from PC (or other STM32 device) */
/* Infinite loop */
state = 0;
while (1) {
uint8_t b;
/* Process RX ringbuffer */
/* Packet format: START_BYTE, CMD, LEN[, DATA[0], DATA[len - 1]], STOP BYTE */
/* DATA bytes are included only if LEN > 0 */
/* An example, send sequence of these bytes: 0x55, 0x01, 0x01, 0xFF, 0xAA */
/* Read byte by byte */
if (lwrb_read(&usart_rx_rb, &b, 1) == 1) {
lwrb_write(&usart_tx_rb, &b, 1); /* Write data to transmit buffer */
usart_start_tx_dma_transfer();
switch (state) {
case 0: { /* Wait for start byte */
if (b == 0x55) {
++state;
}
break;
}
case 1: { /* Check packet command */
cmd = b;
++state;
break;
}
case 2: { /* Packet data length */
len = b;
++state;
if (len == 0) {
++state; /* Ignore data part if len = 0 */
}
break;
}
case 3: { /* Data for command */
--len; /* Decrease for received character */
if (len == 0) {
++state;
}
break;
}
case 4: { /* End of packet */
if (b == 0xAA) {
/* Packet is valid */
/* Send out response with CMD = 0xFF */
b = 0x55; /* Start byte */
lwrb_write(&usart_tx_rb, &b, 1);
cmd = 0xFF; /* Command = 0xFF = OK response */
lwrb_write(&usart_tx_rb, &cmd, 1);
b = 0x00; /* Len = 0 */
lwrb_write(&usart_tx_rb, &b, 1);
b = 0xAA; /* Stop byte */
lwrb_write(&usart_tx_rb, &b, 1);
/* Flush everything */
usart_start_tx_dma_transfer();
}
state = 0;
break;
}
}
}
/* Do other tasks ... */
}
}
/**
* \brief Check for new data received with DMA
*
* User must select context to call this function from:
* - Only interrupts (DMA HT, DMA TC, UART IDLE) with same preemption priority level
* - Only thread context (outside interrupts)
*
* If called from both context-es, exclusive access protection must be implemented
* This mode is not advised as it usually means architecture design problems
*
* When IDLE interrupt is not present, application must rely only on thread context,
* by manually calling function as quickly as possible, to make sure
* data are read from raw buffer and processed.
*
* Not doing reads fast enough may cause DMA to overflow unread received bytes,
* hence application will lost useful data.
*
* Solutions to this are:
* - Improve architecture design to achieve faster reads
* - Increase raw buffer size and allow DMA to write more data before this function is called
*/
void
usart_rx_check(void) {
static size_t old_pos;
size_t pos;
/* Calculate current position in buffer and check for new data available */
pos = ARRAY_LEN(usart_rx_dma_buffer) - LL_DMA_GetDataLength(DMA1, LL_DMA_STREAM_0);
if (pos != old_pos) { /* Check change in received data */
if (pos > old_pos) { /* Current position is over previous one */
/*
* Processing is done in "linear" mode.
*
* Application processing is fast with single data block,
* length is simply calculated by subtracting pointers
*
* [ 0 ]
* [ 1 ] <- old_pos |------------------------------------|
* [ 2 ] | |
* [ 3 ] | Single block (len = pos - old_pos) |
* [ 4 ] | |
* [ 5 ] |------------------------------------|
* [ 6 ] <- pos
* [ 7 ]
* [ N - 1 ]
*/
usart_process_data(&usart_rx_dma_buffer[old_pos], pos - old_pos);
} else {
/*
* Processing is done in "overflow" mode..
*
* Application must process data twice,
* since there are 2 linear memory blocks to handle
*
* [ 0 ] |---------------------------------|
* [ 1 ] | Second block (len = pos) |
* [ 2 ] |---------------------------------|
* [ 3 ] <- pos
* [ 4 ] <- old_pos |---------------------------------|
* [ 5 ] | |
* [ 6 ] | First block (len = N - old_pos) |
* [ 7 ] | |
* [ N - 1 ] |---------------------------------|
*/
usart_process_data(&usart_rx_dma_buffer[old_pos], ARRAY_LEN(usart_rx_dma_buffer) - old_pos);
if (pos > 0) {
usart_process_data(&usart_rx_dma_buffer[0], pos);
}
}
old_pos = pos; /* Save current position as old for next transfers */
}
}
/**
* \brief Check if DMA is active and if not try to send data
*
* This function can be called either by application to start data transfer
* or from DMA TX interrupt after previous transfer just finished
*
* \return `1` if transfer just started, `0` if on-going or no data to transmit
*/
uint8_t
usart_start_tx_dma_transfer(void) {
uint32_t primask;
uint8_t started = 0;
/*
* First check if transfer is currently in-active,
* by examining the value of usart_tx_dma_current_len variable.
*
* This variable is set before DMA transfer is started and cleared in DMA TX complete interrupt.
*
* It is not necessary to disable the interrupts before checking the variable:
*
* When usart_tx_dma_current_len == 0
* - This function is called by either application or TX DMA interrupt
* - When called from interrupt, it was just reset before the call,
* indicating transfer just completed and ready for more
* - When called from an application, transfer was previously already in-active
* and immediate call from interrupt cannot happen at this moment
*
* When usart_tx_dma_current_len != 0
* - This function is called only by an application.
* - It will never be called from interrupt with usart_tx_dma_current_len != 0 condition
*
* Disabling interrupts before checking for next transfer is advised
* only if multiple operating system threads can access to this function w/o
* exclusive access protection (mutex) configured,
* or if application calls this function from multiple interrupts.
*
* This example assumes worst use case scenario,
* hence interrupts are disabled prior every check
*/
primask = __get_PRIMASK();
__disable_irq();
if (usart_tx_dma_current_len == 0
&& (usart_tx_dma_current_len = lwrb_get_linear_block_read_length(&usart_tx_rb)) > 0) {
/* Disable channel if enabled */
LL_DMA_DisableStream(DMA1, LL_DMA_STREAM_1);
/* Clear all flags */
LL_DMA_ClearFlag_TC1(DMA1);
LL_DMA_ClearFlag_HT1(DMA1);
LL_DMA_ClearFlag_TE1(DMA1);
LL_DMA_ClearFlag_DME1(DMA1);
LL_DMA_ClearFlag_FE1(DMA1);
/* Prepare DMA data and length */
LL_DMA_SetDataLength(DMA1, LL_DMA_STREAM_1, usart_tx_dma_current_len);
LL_DMA_SetMemoryAddress(DMA1, LL_DMA_STREAM_1, (uint32_t)lwrb_get_linear_block_read_address(&usart_tx_rb));
/* Start transfer */
LL_DMA_EnableStream(DMA1, LL_DMA_STREAM_1);
started = 1;
}
__set_PRIMASK(primask);
return started;
}
/**
* \brief Process received data over UART
* Data are written to RX ringbuffer for application processing at latter stage
* \param[in] data: Data to process
* \param[in] len: Length in units of bytes
*/
void
usart_process_data(const void* data, size_t len) {
lwrb_write(&usart_rx_rb, data, len); /* Write data to receive buffer */
}
/**
* \brief Send string over USART
* \param[in] str: String to send
*/
void
usart_send_string(const char* str) {
lwrb_write(&usart_tx_rb, str, strlen(str)); /* Write data to transmit buffer */
usart_start_tx_dma_transfer();
}
/**
* \brief USART3 Initialization Function
*/
void
usart_init(void) {
LL_USART_InitTypeDef USART_InitStruct = {0};
// CUBE_MX does this already
//LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* Peripheral clock enable */
//LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_USART3);
//LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOD);
//LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1);
/*
* USART3 GPIO Configuration
*
* PD8 ------> USART3_TX
* PD9 ------> USART3_RX
*/
//GPIO_InitStruct.Pin = LL_GPIO_PIN_8 | LL_GPIO_PIN_9;
//GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
//GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
//GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
//GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
//GPIO_InitStruct.Alternate = LL_GPIO_AF_7;
//LL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/* USART3_RX Init */
// CUBE_MX does this already
//LL_DMA_SetPeriphRequest(DMA1, LL_DMA_STREAM_0, LL_DMAMUX1_REQ_USART3_RX);
//LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_STREAM_0, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
//LL_DMA_SetStreamPriorityLevel(DMA1, LL_DMA_STREAM_0, LL_DMA_PRIORITY_LOW);
//LL_DMA_SetMode(DMA1, LL_DMA_STREAM_0, LL_DMA_MODE_CIRCULAR);
//LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_STREAM_0, LL_DMA_PERIPH_NOINCREMENT);
//LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_STREAM_0, LL_DMA_MEMORY_INCREMENT);
//LL_DMA_SetPeriphSize(DMA1, LL_DMA_STREAM_0, LL_DMA_PDATAALIGN_BYTE);
//LL_DMA_SetMemorySize(DMA1, LL_DMA_STREAM_0, LL_DMA_MDATAALIGN_BYTE);
//LL_DMA_DisableFifoMode(DMA1, LL_DMA_STREAM_0);
LL_DMA_SetPeriphAddress(DMA1, LL_DMA_STREAM_0, LL_USART_DMA_GetRegAddr(USART3, LL_USART_DMA_REG_DATA_RECEIVE));
LL_DMA_SetMemoryAddress(DMA1, LL_DMA_STREAM_0, (uint32_t)usart_rx_dma_buffer);
LL_DMA_SetDataLength(DMA1, LL_DMA_STREAM_0, ARRAY_LEN(usart_rx_dma_buffer));
/* USART3_TX Init */
// CUBE_MX does this already
//LL_DMA_SetPeriphRequest(DMA1, LL_DMA_STREAM_1, LL_DMAMUX1_REQ_USART3_TX);
//LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_STREAM_1, LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
//LL_DMA_SetStreamPriorityLevel(DMA1, LL_DMA_STREAM_1, LL_DMA_PRIORITY_LOW);
//LL_DMA_SetMode(DMA1, LL_DMA_STREAM_1, LL_DMA_MODE_NORMAL);
//LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_STREAM_1, LL_DMA_PERIPH_NOINCREMENT);
//LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_STREAM_1, LL_DMA_MEMORY_INCREMENT);
//LL_DMA_SetPeriphSize(DMA1, LL_DMA_STREAM_1, LL_DMA_PDATAALIGN_BYTE);
//LL_DMA_SetMemorySize(DMA1, LL_DMA_STREAM_1, LL_DMA_MDATAALIGN_BYTE);
//LL_DMA_DisableFifoMode(DMA1, LL_DMA_STREAM_1);
LL_DMA_SetPeriphAddress(DMA1, LL_DMA_STREAM_1, LL_USART_DMA_GetRegAddr(USART3, LL_USART_DMA_REG_DATA_TRANSMIT));
/* Enable DMA RX HT & TC interrupts */
LL_DMA_EnableIT_HT(DMA1, LL_DMA_STREAM_0);
LL_DMA_EnableIT_TC(DMA1, LL_DMA_STREAM_0);
/* Enable DMA TX TC interrupts */
LL_DMA_EnableIT_TC(DMA1, LL_DMA_STREAM_1);
/* DMA interrupt init */
// CUBE_MX does this already dma.c
//NVIC_SetPriority(DMA1_Stream0_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 0, 0));
//NVIC_EnableIRQ(DMA1_Stream0_IRQn);
//NVIC_SetPriority(DMA1_Stream1_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 0, 0));
//NVIC_EnableIRQ(DMA1_Stream1_IRQn);
/* Configure USART3 */
// CUBE_MX does this already usart.c
//USART_InitStruct.PrescalerValue = LL_USART_PRESCALER_DIV1;
//USART_InitStruct.BaudRate = 115200;
//USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
//USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
//USART_InitStruct.Parity = LL_USART_PARITY_NONE;
//USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
//USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
//USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
//LL_USART_Init(USART3, &USART_InitStruct);
//LL_USART_SetTXFIFOThreshold(USART3, LL_USART_FIFOTHRESHOLD_7_8);
//LL_USART_SetRXFIFOThreshold(USART3, LL_USART_FIFOTHRESHOLD_7_8);
//LL_USART_EnableFIFO(USART3);
//LL_USART_ConfigAsyncMode(USART3);
LL_USART_EnableDMAReq_RX(USART3);
LL_USART_EnableDMAReq_TX(USART3);
LL_USART_EnableIT_IDLE(USART3);
/* USART interrupt, same priority as DMA channel */
// CUBE_MX does this already usart.c
//NVIC_SetPriority(USART3_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 0, 0));
//NVIC_EnableIRQ(USART3_IRQn);
/* Enable USART and DMA RX */
LL_DMA_EnableStream(DMA1, LL_DMA_STREAM_0);
//LL_USART_Enable(USART3);
/* Polling USART3 initialization */
while (!LL_USART_IsActiveFlag_TEACK(USART3) || !LL_USART_IsActiveFlag_REACK(USART3)) {}
}
/* Interrupt handlers here */
/**
* \brief DMA1 stream1 interrupt handler for USART3 RX
*/
void
DMA1_Stream0_IRQHandler(void) {
/* Check half-transfer complete interrupt */
if (LL_DMA_IsEnabledIT_HT(DMA1, LL_DMA_STREAM_0) && LL_DMA_IsActiveFlag_HT0(DMA1)) {
LL_DMA_ClearFlag_HT0(DMA1); /* Clear half-transfer complete flag */
usart_rx_check(); /* Check for data to process */
}
/* Check transfer-complete interrupt */
if (LL_DMA_IsEnabledIT_TC(DMA1, LL_DMA_STREAM_0) && LL_DMA_IsActiveFlag_TC0(DMA1)) {
LL_DMA_ClearFlag_TC0(DMA1); /* Clear transfer complete flag */
usart_rx_check(); /* Check for data to process */
}
/* Implement other events when needed */
}
/**
* \brief DMA1 stream1 interrupt handler for USART3 TX
*/
void
DMA1_Stream1_IRQHandler(void) {
/* Check transfer complete */
if (LL_DMA_IsEnabledIT_TC(DMA1, LL_DMA_STREAM_1) && LL_DMA_IsActiveFlag_TC1(DMA1)) {
LL_DMA_ClearFlag_TC1(DMA1); /* Clear transfer complete flag */
lwrb_skip(&usart_tx_rb, usart_tx_dma_current_len);/* Skip sent data, mark as read */
usart_tx_dma_current_len = 0; /* Clear length variable */
usart_start_tx_dma_transfer(); /* Start sending more data */
}
/* Implement other events when needed */
}
/**
* \brief USART3 global interrupt handler
*/
void
USART3_IRQHandler(void) {
/* Check for IDLE line interrupt */
if (LL_USART_IsEnabledIT_IDLE(USART3) && LL_USART_IsActiveFlag_IDLE(USART3)) {
LL_USART_ClearFlag_IDLE(USART3); /* Clear IDLE line flag */
usart_rx_check(); /* Check for data to process */
}
/* Implement other events when needed */
}
/**
* \brief System Clock Configuration
*/
void
SystemClock_Config(void) {
/* Configure flash latency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);
if (LL_FLASH_GetLatency() != LL_FLASH_LATENCY_4) {
while (1) {}
}
/* Configure power supply and voltage scale */
LL_PWR_ConfigSupply(LL_PWR_LDO_SUPPLY);
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0);
/* Uncomment if used on STM32H745/H755 Nucleo */
/* Dual-Core Nucleo board used external SMPS instead of LDO */
/* Manually enable it */
//PWR->CR3 |= 1 << 2;
/* Configure HSE */
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while (!LL_RCC_HSE_IsReady()) {}
/* Configure PLL */
LL_RCC_PLL_SetSource(LL_RCC_PLLSOURCE_HSE);
LL_RCC_PLL1P_Enable();
LL_RCC_PLL1Q_Enable();
LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_8_16);
LL_RCC_PLL1_SetVCOOutputRange(LL_RCC_PLLVCORANGE_WIDE);
LL_RCC_PLL1_SetM(1);
LL_RCC_PLL1_SetN(120);
LL_RCC_PLL1_SetP(2);
LL_RCC_PLL1_SetQ(20);
LL_RCC_PLL1_SetR(2);
LL_RCC_PLL1_Enable();
while (!LL_RCC_PLL1_IsReady()) {}
/* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */
LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1);
LL_RCC_SetSysPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2);
LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_2);
LL_RCC_SetAPB4Prescaler(LL_RCC_APB4_DIV_2);
/* Configure systick */
LL_Init1msTick(480000000);
LL_SYSTICK_SetClkSource(LL_SYSTICK_CLKSOURCE_HCLK);
LL_SetSystemCoreClock(480000000);
LL_RCC_SetUSARTClockSource(LL_RCC_USART234578_CLKSOURCE_PCLK1);
}