用stm32固件库实现串口打印多通道数据的代码

以下是使用STM32固件库实现串口打印多通道数据的示例代码：

#include "stm32f10x.h"

#define USART_TX_GPIO_PORT GPIOA
#define USART_TX_GPIO_PIN GPIO_Pin_9
#define USART_RX_GPIO_PORT GPIOA
#define USART_RX_GPIO_PIN GPIO_Pin_10
#define USARTx USART1
#define USART_BAUDRATE 115200

void USART_Config(void) {
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |
                             RCC_APB2Periph_AFIO,
                         ENABLE);

  GPIO_InitStructure.GPIO_Pin = USART_TX_GPIO_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USART_TX_GPIO_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = USART_RX_GPIO_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USART_RX_GPIO_PORT, &GPIO_InitStructure);

  USART_InitStructure.USART_BaudRate = USART_BAUDRATE;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl =
      USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Tx;
  USART_Init(USARTx, &USART_InitStructure);

  USART_Cmd(USARTx, ENABLE);
}

void USART_SendDataMultiChannel(uint8_t channel, uint16_t data) {
  char buffer[50];
  sprintf(buffer, "Channel %d: %d\n", channel, data);
  USART_SendString(buffer);
}

void USART_SendString(char *str) {
  while (*str) {
    while (USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET)
      ;
    USART_SendData(USARTx, *str++);
    while (USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)
      ;
  }
}

int main(void) {
  USART_Config();

  // Sample data for multiple channels
  uint16_t channel1 = 100;
  uint16_t channel2 = 200;
  uint16_t channel3 = 300;

  // Print data for each channel
  USART_SendDataMultiChannel(1, channel1);
  USART_SendDataMultiChannel(2, channel2);
  USART_SendDataMultiChannel(3, channel3);

  while (1) {
  }
}

该代码使用USART1串口和PA9和PA10引脚进行通信，使用sprintf函数将多个通道的数据格式化为字符串，然后通过USART_SendString函数将该字符串发送到串口。USART_SendDataMultiChannel函数用于格式化数据并调用USART_SendString函数发送数据。在主函数中，我们将三个通道的数据示例打印到串口。