stm32f103串口发送字符串

在STM32F103单片机中，串口发送字符串的基本步骤如下：

1. 配置串口工作模式和参数，例如波特率、数据位、停止位和校验位等；

2. 在发送字符串之前，首先要将要发送的字符串数据存储到一个字符数组中；

3. 使用串口发送函数将字符数组中的数据逐一发送出去，直到整个字符串数据全部发送完毕。

下面是一个简单的串口发送字符串的示例代码：

#include "stm32f10x.h"

#define USART1_TX_PIN   GPIO_Pin_9
#define USART1_RX_PIN   GPIO_Pin_10

void USART1_Init(void)
{
    USART_InitTypeDef USART_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure USART1 Tx as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = USART1_TX_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure USART1 Rx as input floating */
    GPIO_InitStructure.GPIO_Pin = USART1_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* USART1 configuration */
    USART_InitStructure.USART_BaudRate = 9600;
    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(USART1, &USART_InitStructure);

    /* Enable USART1 */
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendString(char* s)
{
    while (*s)
    {
        while (!(USART1->SR & USART_SR_TXE));
        USART_SendData(USART1, *s++);
    }
}

int main(void)
{
    char str[] = "Hello, STM32F103!";
    
    USART1_Init();
    
    USART1_SendString(str);
    
    while (1);
}