// Define macros for UART and DMA configurations
#define MAIN_UART USART1
#define MAIN_DMA_RX 1
#define MAIN_DMA_RX_CHANNEL 0
#define MAIN_DMA_TX 1
#define MAIN_DMA_TX_CHANNEL 1

#define HALF_UART USART3
#define HALF_DMA_RX 1
#define HALF_DMA_RX_CHANNEL 2
#define HALF_DMA_TX 1
#define HALF_DMA_TX_CHANNEL 3

#define DMA_MEM_ATTR __attribute__((section(".data")))