STM32F407串口相关问题 - - Powered by Discuz!

标题: STM32F407串口相关问题 [打印本页]

作者: matlab？ 时间: 2022-7-27 16:17
标题: STM32F407串口相关问题
我想请问下STM32F407的USATT1 PA9 PA10与USART6（TTL）PC6 PC7有什么区别啊，同样都是用cubeMX生成的，为什么USART1可以通讯，USART6就不行呢;参数都是这些参数，就引脚换了还有把AF7换成AF8了；

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作者: 的花朵 时间: 2022-7-27 18:31
要不咱还是把工程发出来？这样子大家只能靠猜

作者: matlab？ 时间: 2022-7-28 08:04
USART1:
usart.c
#include "usart.h"
#include "stm32f4xx_hal.h"
#include <stdio.h>
UART_HandleTypeDef huart1;
void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  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;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
Error_Handler();
  }
}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART1)
  {

__HAL_RCC_USART1_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART1 GPIO Configuration
PA9    ------> USART1_TX
PA10    ------> USART1_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);

  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART1)
  {

__HAL_RCC_USART1_CLK_DISABLE();

/**USART1 GPIO Configuration
PA9    ------> USART1_TX
PA10    ------> USART1_RX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);

HAL_NVIC_DisableIRQ(USART1_IRQn);

  }
}

int fputc(int ch, FILE *f)
{
  HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xffff);
  return ch;
}

int fgetc(FILE *f)
{
  uint8_t ch = 0;
  HAL_UART_Receive(&huart1, &ch, 1, 0xffff);
  return ch;
}

main.c
#include "main.h"
#include "usart.h"
#include "gpio.h"

#define RXBUFFERSIZE  256
char RxBuffer[RXBUFFERSIZE];

void SystemClock_Config(void);
int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();
  MX_USART1_UART_Init();

  while (1)
  {

printf("Zzz\n");
HAL_Delay(1000);
  }

}
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
Error_Handler();
  }  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                           |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
Error_Handler();
  }
}
void Error_Handler(void)
{
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

USART6

usart.c
#include "usart.h"
#include "stm32f4xx_hal.h"
#include <stdio.h>

UART_HandleTypeDef huart6;

void MX_USART6_UART_Init(void)
{
  huart6.Instance = USART6;
  huart6.Init.BaudRate = 115200;
  huart6.Init.WordLength = UART_WORDLENGTH_8B;
  huart6.Init.StopBits = UART_STOPBITS_1;
  huart6.Init.Parity = UART_PARITY_NONE;
  huart6.Init.Mode = UART_MODE_TX_RX;
  huart6.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart6.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart6) != HAL_OK)
  {
Error_Handler();
}
}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART6)
  {

__HAL_RCC_USART6_CLK_ENABLE();

__HAL_RCC_GPIOC_CLK_ENABLE();
/**USART6 GPIO Configuration
PC6    ------> USART6_TX
PC7    ------> USART6_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_USART6;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/* USART6 interrupt Init */
HAL_NVIC_SetPriority(USART6_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART6_IRQn);

  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART6)
  {

__HAL_RCC_USART6_CLK_DISABLE();

/**USART6 GPIO Configuration
PC6    ------> USART6_TX
PC7    ------> USART6_RX
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_6|GPIO_PIN_7);

/* USART6 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART6_IRQn);
  /* USER CODE BEGIN USART6_MspDeInit 1 */

  /* USER CODE END USART6_MspDeInit 1 */
  }
}

int fputc(int ch, FILE *f)
{
  HAL_UART_Transmit(&huart6, (uint8_t *)&ch, 1, 0xffff);
  return ch;
}

int fgetc(FILE *f)
{
  uint8_t ch = 0;
  HAL_UART_Receive(&huart6, &ch, 1, 0xffff);
  return ch;
}
main.c
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#define RXBUFFERSIZE  256
char RxBuffer[RXBUFFERSIZE];

void SystemClock_Config(void);

int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();
  MX_USART6_UART_Init();

  while (1)
  {

printf("Zzzz\n");
HAL_Delay(1000);
  }

}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                           |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
Error_Handler();
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{

  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

作者: matlab？ 时间: 2022-7-28 08:07
都是一样的程序（系统自动生成的），我就加了一个fputc和fgetc函数，其他的没什么变化了，就引脚不同，

作者: yzwzfyz 时间: 2022-7-28 08:19
细读CPU的手册上的相关章节，这个比较靠谱。

作者: matlab？ 时间: 2022-7-28 08:20
文件太大了，上传不了

作者: matlab？ 时间: 2022-7-28 08:45

yzwzfyz 发表于 2022-7-28 08:19
细读CPU的手册上的相关章节，这个比较靠谱。

是的，我就是想找到关于这个芯片引脚资料来的，好对比他们的区别

作者: matlab？ 时间: 2022-7-28 14:54
好吧，被自己无语到，原来是因为串口一和串口二引脚不同，导致接线位置不一样，而我一直用的是串口一的串口，，，，

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