Tengo un STM32F303K8T6 uC y estoy usando el UART para transferir datos a una PC. Ahora, cuando desconecto la interfaz en serie mientras se ejecuta, todo el programa se ejecuta en un error. ¿Cómo puedo verificar HAL, si el UART está disponible?
Para la transmisión utilizo la siguiente función:
HAL_UART_Transmit_DMA(usart1, str,size);
Editar: Tengo aquí ahora el código para el UART1. La función RxCallback nunca se llama, ya que siempre se ejecuta en un error de saturación:
if(((isrflags & USART_ISR_ORE) != RESET) &&
(((cr1its & USART_CR1_RXNEIE) != RESET) || ((cr3its & USART_CR3_EIE) != RESET)))
{
__HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
huart->ErrorCode |= HAL_UART_ERROR_ORE;
}
Ahora aquí está el código de la inicialización de UART for RX:
main.c:
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f3xx_hal.h"
/* USER CODE BEGIN Includes */
#include "USART.h"
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;
char rx_buff[BUFFSIZE_RX];
char rx_data[BUFFSIZE_RX];
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* 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_DMA_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
//UART
init_usart(&huart1);
//HAL_UART_Receive_IT(&huart1, (uint8_t *)buff_rx, USART_BUFFER_SIZE);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInit;
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USART1 init function */
static void MX_USART1_UART_Init(void)
{
huart1.Instance = USART1;
huart1.Init.BaudRate = 57600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
}
/**
* Enable DMA controller clock
*/
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel4_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
}
/** Pinout Configuration
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
///////////////////////CALLBACK//////////////////////////////////////////////////////////////////////////////////
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
}
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
}
///////////////////////END_CALLBACK//////////////////////////////////////////////////////////////////////////////
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
void _Error_Handler(char * file, int line)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
UART.c:
#include <USART.h>
#include "stdlib.h"
extern rx_buff[BUFFSIZE_RX];
extern rx_data[BUFFSIZE_RX];
/*
* Variables to adjust via USART RX
*/
char *key;
char *s1;
char *s2;
uint8_t buff[36];
float val;
//////////////////////////////////////////////////
//////////////////////////////////////////////////
void init_usart(UART_HandleTypeDef *u) {
usart_handler=u;
__HAL_UART_ENABLE_IT(usart_handler,UART_IT_RXNE);
//HAL_UART_Receive_DMA(u, &rx_data, BUFFSIZE_RX);
}
void usart_tx(UART_HandleTypeDef *usart1, uint16_t bufferSize, char *str) {
int size=0;
char *p_str=str;
for(uint16_t i=0;i<bufferSize;i++) {
if(*p_str) {
size++;
p_str++;
} else {
break;
}
}
HAL_UART_Transmit_DMA(usart1, str,size);
}
void clearBuffer(char *buff, int size) {
for(int i=0;i<size;i++) {
buff[i]='void USART1_IRQHandler(void)
{
/* USER CODE BEGIN USART1_IRQn 0 */
uint8_t isRx = 0;
uint32_t it_rx=0;
uint32_t it_tx=0;
it_rx=USART1->ISR & UART_IT_RXNE;
it_tx=USART1->ISR & UART_IT_TXE;
if (it_tx!=0) {
isRx=1;
} else {
isRx=0;
}
/* USER CODE END USART1_IRQn 0 */
HAL_UART_IRQHandler(&huart1);
/* USER CODE BEGIN USART1_IRQn 1 */
if(isRx) {
uint8_t rbyte = huart1.Instance->RDR;
__HAL_UART_SEND_REQ(&huart1, UART_RXDATA_FLUSH_REQUEST);
rx_data[pointer]=rbyte;
if(rx_data[pointer]=='$') {
rx_data[pointer]='HAL_UART_Transmit_DMA(usart1, str,size);
';
pointer=0;
copyValuesToBuff();
clearBuffer(&rx_data,BUFFSIZE_RX);
} else {
pointer++;
if(pointer>=BUFFSIZE_RX) {
pointer=0;
}
}
__HAL_UART_ENABLE_IT(&huart1,UART_IT_RXNE);
}
/* USER CODE END USART1_IRQn 1 */
}
';
}
}
void copyValuesToBuff() {
sprintf(rx_buff,"%s\n",rx_data);
setCommand();
}
void setCommand() {
val=0;
key = strtok(rx_buff, "=.");
s1 = strtok(NULL, "=.");
s2 = strtok(NULL,"=.");
if(strcmp(s1,"")==0 || strcmp(s2,"")==0) {
} else {
sprintf(buff,"%s.%s",(char*)s1,(char*)s2); //only works if x.y, only x alone does not work!!!!
val=strtof(buff,NULL);
}
}
int strcmp(const char *s1, const char *s2)
{
const unsigned char *c1 = (const unsigned char *)s1;
const unsigned char *c2 = (const unsigned char *)s2;
unsigned char ch;
int d = 0;
while (1) {
d = (int)(ch = *c1++) - (int)*c2++;
if (d || !ch)
break;
}
return d;
}
Editar: ¿Cómo puedo ver exactamente si ocurrió una interrupción de rx o una interrupción de tx y cómo puedo decidir si ocurrió solo porque rx está flotando? Intenté lo siguiente, pero solo funciona si el cable está conectado:
if(((isrflags & USART_ISR_ORE) != RESET) &&
(((cr1its & USART_CR1_RXNEIE) != RESET) || ((cr3its & USART_CR3_EIE) != RESET)))
{
__HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
huart->ErrorCode |= HAL_UART_ERROR_ORE;
}