STM32H7串口轮询模式发送出错

星环 · 发表于 2019-2-28 18:59:06

环境：STM32H743II，阿波罗开发板，IAR编译。
错误描述：使用HAL_UART_Transmit()函数在主函数中发送数据，程序在此处卡死，上位机只能接收到第一个字符。但配置EXTI中断后，在中断回调函数中使用HAL_UART_Transmit()函数，程序能正常执行，且上位机能接收到完整数据。使用单步调试无法重现错误。

[mw_shl_code=c,true]void USER_UART1_Init()
{
__HAL_RCC_USART1_CLK_ENABLE();
UART1_Handler.Instance=USART1;
UART1_Handler.Init.BaudRate=9600;
UART1_Handler.Init.HwFlowCtl=UART_HWCONTROL_NONE;
UART1_Handler.Init.Mode=UART_MODE_TX_RX;
UART1_Handler.Init.OverSampling=UART_OVERSAMPLING_16;
UART1_Handler.Init.Parity=UART_PARITY_NONE;
UART1_Handler.Init.StopBits=UART_STOPBITS_1;
UART1_Handler.Init.WordLength=UART_WORDLENGTH_8B;
HAL_UART_Init(&UART1_Handler);
}[/mw_shl_code]

[mw_shl_code=c,true]void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
if(huart->Instance==USART1){
      __HAL_RCC_GPIOA_CLK_ENABLE();
      GPIO_InitTypeDef GPIO_Initure;
      GPIO_Initure.Alternate=GPIO_AF7_USART1;
      GPIO_Initure.Mode=GPIO_MODE_AF_PP;
      GPIO_Initure.Pin=GPIO_PIN_9 | GPIO_PIN_10;
      GPIO_Initure.Pull=GPIO_PULLUP;
      GPIO_Initure.Speed=GPIO_SPEED_FREQ_HIGH;
      HAL_GPIO_Init(GPIOA,&GPIO_Initure);
}
}[/mw_shl_code]

[mw_shl_code=c,true]
int main()
{
HAL_Init();
USER_CLOCK_Init();
USER_CACHE_Enable();
USER_EXTI_Init();
USER_UART1_Init();
USER_LED_Enable(USER_LED_0);
uint8_t transmite_buffer[]="sending\r\n";
HAL_UART_Transmit(&UART1_Handler,transmite_buffer,9,100);    //若注解此行，程序能正常执行，且进入中断后，串口能正常发送。若不注解此行，串口仅发送字符"s"，程序卡死。
USER_LED_Enable(USER_LED_1);
while(1);
}[/mw_shl_code]

[mw_shl_code=c,true]void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
uint8_t transmite_buffer[]="sending\r\n";
switch(GPIO_Pin){
      case GPIO_PIN_0:    USER_LED_Toggle(USER_LED_0); USER_LED_Toggle(USER_LED_1); break;
      case GPIO_PIN_13: USER_LED_Toggle(USER_LED_0);                                  break;
      case GPIO_PIN_3: USER_LED_Toggle(USER_LED_1);                                  break;
      default:          HAL_UART_Transmit(&UART1_Handler,transmite_buffer,10,100);
}
}
[/mw_shl_code]

void USER_CLOCK_Init()
{
const uint32_t plln=160,pllm=5,pllp=2,pllq=4;
HAL_StatusTypeDef ret=HAL_OK;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;

MODIFY_REG(PWR->CR3,PWR_CR3_SCUEN, 0);
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

while ((PWR->D3CR & (PWR_D3CR_VOSRDY)) != PWR_D3CR_VOSRDY) {}

RCC_OscInitStruct.OscillatorType=RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState=RCC_HSE_ON;
RCC_OscInitStruct.HSIState=RCC_HSI_OFF;
RCC_OscInitStruct.CSIState=RCC_CSI_OFF;
RCC_OscInitStruct.PLL.PLLState=RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource=RCC_PLLSOURCE_HSE;

RCC_OscInitStruct.PLL.PLLN=plln;
RCC_OscInitStruct.PLL.PLLM=pllm;
RCC_OscInitStruct.PLL.PLLP=pllp;
RCC_OscInitStruct.PLL.PLLQ=pllq;

RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
ret=HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret!=HAL_OK) while(1);

RCC_ClkInitStruct.ClockType=(RCC_CLOCKTYPE_SYSCLK|\
                              RCC_CLOCKTYPE_HCLK |\
                              RCC_CLOCKTYPE_D1PCLK1 |\
                              RCC_CLOCKTYPE_PCLK1 |\
                              RCC_CLOCKTYPE_PCLK2 |\
                              RCC_CLOCKTYPE_D3PCLK1);

RCC_ClkInitStruct.SYSCLKSource=RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider=RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider=RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB1CLKDivider=RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider=RCC_APB2_DIV2;
RCC_ClkInitStruct.APB3CLKDivider=RCC_APB3_DIV2;
RCC_ClkInitStruct.APB4CLKDivider=RCC_APB4_DIV4;
ret=HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);
if(ret!=HAL_OK) while(1);

__HAL_RCC_CSI_ENABLE() ;
__HAL_RCC_SYSCFG_CLK_ENABLE() ;
HAL_EnableCompensationCell();
}