Posted on October 18, 2017 at 18:51
I set up a new cube project for Nucleo-F401RE, doing what you are doing. USART1 was connect to USB2SER adapter. USART2 pins (pa2/pa3) are not connected at the morpho or arduino connectors. They are connected to StLink and the VCP. At first i setup USARTs at 115K
Both ends are connected to terminal apps on PC.
When i send single chars works fine.
Then i sent a file, and got missing charsand errors (overrun) at the error handler.
Works fine, if i add 1ms internal char delay in sending the file.
401 is running at 84MHz. your 446RE might do better at 180MHz with both at 115K.
But, you are using 9600 and 115K. You should have no issue for 9600 device going to 115k forwarding.
When usart2 (device) is set at 9600, there are no errors, and no need for char delays (device forwarded to PC)
Butthe reverse case, with yoursimple symmetric handlers with blocking sends are not going to work, goingthe other way,unlessyou throttle the send (ie single chars with very large inter char delays).
Nothing wrong with HAL libs. They work. I get interrupts. I am using latest cube and F4 HAL.
Here is working code on NUC 401, but it too will fail, going 115K to 9600, if you send without some form of throttling.
/* Includes ------------------------------------------------------------------*/
#include 'main.h'
#include 'stm32f4xx_hal.h'
#include 'usart.h'
#include 'gpio.h'
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
uint8_t txbuffer[16] = 'hello
';
uint8_t rxbuffer1[16];
uint8_t txbuffer1[16];
uint8_t rxbuffer2[16];
uint8_t txbuffer2[16];
volatile uint8_t newdata1 = RESET;
volatile uint8_t newdata2 = RESET;
volatile uint32_t usarterror;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART1)
{
newdata1 = SET;
}
if (huart->Instance == USART2)
{
newdata2 = SET;
}
}
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
usarterror = HAL_UART_GetError(huart);
// see errors on line 207-212 of stm32f4xx_hal_uart.h
_Error_Handler(__FILE__, __LINE__);
}
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_USART6_UART_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
if (HAL_UART_Receive_IT(&huart1, (uint8_t*)rxbuffer1, 1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
if (HAL_UART_Receive_IT(&huart2, (uint8_t*)rxbuffer2, 1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
if (newdata1)
{
txbuffer2[0] = rxbuffer1[0];
HAL_UART_Receive_IT(&huart1, (uint8_t*)rxbuffer1, 1);
HAL_UART_Transmit_IT(&huart2, (uint8_t*)txbuffer2, 1);
newdata1 = RESET;
}
if (newdata2)
{
txbuffer1[0] = rxbuffer2[0];
HAL_UART_Receive_IT(&huart2, (uint8_t*)rxbuffer2, 1);
HAL_UART_Transmit_IT(&huart1, (uint8_t*)txbuffer1, 1);
newdata2 = RESET;
}
}
/* USER CODE END 3 */
}
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