crosstyan/stmf411re_test
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bad uart tx

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crosstyan
2025-10-30 12:01:58 +08:00
parent d6b562d808
commit e13395836f
4 changed files with 110 additions and 32 deletions
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59
Core/Src/main.c
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@ -45,7 +45,8 @@ UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;
/* USER CODE BEGIN PV */
static uint8_t rx_buf[16];
static volatile uint8_t rx_complete = 0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
@ -95,26 +96,46 @@ int main(void)
MX_USART1_UART_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
/* Start UART2 reception in interrupt mode */
HAL_UART_Receive_IT(&huart2, rx_buf, sizeof(rx_buf));
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1) {
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
/* Heartbeat: emit tick timestamp over UART1 and blink the PB6 LED */
int msg_len = snprintf(heartbeat_buf, sizeof(heartbeat_buf),
"PB6 heartbeat %lu\r\n", (unsigned long)HAL_GetTick());
if (msg_len > 0) {
if (msg_len >= (int)sizeof(heartbeat_buf)) {
msg_len = (int)sizeof(heartbeat_buf) - 1;
static uint32_t last_toggle_timestamp;
if (HAL_GetTick() - last_toggle_timestamp >= 1000) {
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
/* Heartbeat: emit tick timestamp over UART1 and blink the PB6 LED */
int msg_len = snprintf(heartbeat_buf, sizeof(heartbeat_buf),
"PB6 heartbeat %lu\r\n", (unsigned long)HAL_GetTick());
if (msg_len > 0) {
if (msg_len >= (int)sizeof(heartbeat_buf)) {
msg_len = (int)sizeof(heartbeat_buf) - 1;
}
HAL_UART_Transmit(&huart1, (uint8_t *)heartbeat_buf, (uint16_t)msg_len,
HAL_MAX_DELAY);
}
HAL_UART_Transmit(&huart1, (uint8_t *)heartbeat_buf, (uint16_t)msg_len,
HAL_MAX_DELAY);
last_toggle_timestamp = HAL_GetTick();
}
/* Check if data received from UART2 */
if (rx_complete) {
rx_complete = 0;
/* Print received buffer as hex to UART1 */
char hex_buf[64];
int hex_len = snprintf(hex_buf, sizeof(hex_buf), "RX: ");
for (int i = 0; i < (int)sizeof(rx_buf) && hex_len < (int)sizeof(hex_buf) - 4; i++) {
hex_len += snprintf(hex_buf + hex_len, sizeof(hex_buf) - hex_len, "%02X ", rx_buf[i]);
}
hex_len += snprintf(hex_buf + hex_len, sizeof(hex_buf) - hex_len, "\r\n");
HAL_UART_Transmit(&huart1, (uint8_t *)hex_buf, (uint16_t)hex_len, HAL_MAX_DELAY);
/* Re-arm UART2 reception */
HAL_UART_Receive_IT(&huart2, rx_buf, sizeof(rx_buf));
}
HAL_Delay(1000);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
@ -275,6 +296,18 @@ static void MX_GPIO_Init(void)
/* USER CODE BEGIN 4 */
/**
* @brief Rx Transfer completed callback
* @param huart: UART handle
* @retval None
*/
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART2) {
rx_complete = 1;
}
}
/* USER CODE END 4 */
/**