int main(void) {
/* Initialize system */
SystemInit();
/* Init USART2 on pins TX = PA2, RX = PA3 */
/* This pins are used on Nucleo boards for USB to UART via ST-Link */
TM_USART_Init(USART2, TM_USART_PinsPack_1, 115200);
/* Say string without DMA */
TM_USART_Puts(USART2, "Hello via USART2 without DMA\n");
/* Init TX DMA for USART2 */
TM_USART_DMA_Init(USART2);
/* Send data with DMA */
TM_USART_DMA_Send(USART2, (uint8_t *)USART_Buffer, strlen(USART_Buffer));
/* Wait till DMA works */
/* You can do other stuff here instead of waiting for DMA to end */
while (TM_USART_DMA_Sending(USART2));
while (1) {
/* If any string arrived over USART */
/* Expecting "\n" at the end of string from USART terminal or any other source */
if (TM_USART_Gets(USART2, USART_Buffer, sizeof(USART_Buffer))) {
/* Send it back over DMA */
TM_USART_DMA_Send(USART2, (uint8_t *)USART_Buffer, strlen(USART_Buffer));
/* Wait till DMA works */
/* You can do other stuff here instead of waiting for DMA to end */
while (TM_USART_DMA_Sending(USART2));
}
}
}
int main(void) {
/* Init system clock for maximum system speed */
TM_RCC_InitSystem();
/* Init HAL layer */
HAL_Init();
/* Init USART, check USART lib description for pinout */
TM_USART_Init(USART, TM_USART_PinsPack_1, 921600);
/* Say string without DMA */
TM_USART_Puts(USART, "Hello via USART without DMA\n");
/* Init TX DMA for USART */
TM_USART_DMA_Init(USART);
/* Enable interrupts for TX DMA */
TM_USART_DMA_EnableInterrupts(USART);
/* Send data with DMA */
TM_USART_DMA_Send(USART, (uint8_t *)USART_Buffer, strlen(USART_Buffer));
/* Wait till DMA works */
/* You can do other stuff here instead of waiting for DMA to end */
while (TM_USART_DMA_Transmitting(USART));
while (1) {
/* If any string arrived over USART */
/* Expecting "\n" at the end of string from USART terminal or any other source */
if (TM_USART_Gets(USART, USART_Buffer, sizeof(USART_Buffer))) {
/* Send it back over DMA */
TM_USART_DMA_Send(USART, (uint8_t *)USART_Buffer, strlen(USART_Buffer));
/* Wait till DMA works */
/* You can do other stuff here instead of waiting for DMA to end */
while (TM_USART_DMA_Transmitting(USART));
}
}
}
uint8_t TM_USART_DMA_Puts(USART_TypeDef* USARTx, char* DataArray) {
/* Call DMA Send function */
return TM_USART_DMA_Send(USARTx, (uint8_t *)DataArray, strlen(DataArray));
}
