STM32的代码

由于STM32系列有多种型号和不同的应用场景，因此STM32的代码也是多种多样的。以下是一些常见的STM32代码示例：

1. 点亮LED灯

#include "stm32f10x.h"

int main(void)
{
    /* 初始化GPIOB端口 */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* 点亮LED灯 */
    GPIO_SetBits(GPIOB, GPIO_Pin_5);

    while(1);

    return 0;
}

2. 使用定时器进行延时

#include "stm32f10x.h"

void delay_ms(uint32_t ms)
{
    /* 初始化定时器 */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period = 1000 - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 7200 - 1;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
    TIM_Cmd(TIM2, ENABLE);

    /* 延时 */
    while(ms--)
    {
        while(TIM_GetFlagStatus(TIM2, TIM_FLAG_Update) == RESET);
        TIM_ClearFlag(TIM2, TIM_FLAG_Update);
    }
}

int main(void)
{
    /* 初始化GPIOB端口 */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* 点亮LED灯并延时 */
    GPIO_SetBits(GPIOB, GPIO_Pin_5);
    delay_ms(1000);
    GPIO_ResetBits(GPIOB, GPIO_Pin_5);
    delay_ms(1000);

    while(1);

    return 0;
}

3. 使用ADC读取模拟信号

#include "stm32f10x.h"

void ADC_Config(void)
{
    /* 初始化GPIOA和ADC1 */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_InitTypeDef ADC_InitStructure;
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    /* 配置ADC1的通道1为单次采样 */
    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);

    /* 启动ADC1 */
    ADC_Cmd(ADC1, ENABLE);
}

uint16_t ADC_ReadValue(void)
{
    /* 开始采样 */
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);

    /* 等待采样完成 */
    while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);

    /* 读取采样值 */
    return ADC_GetConversionValue(ADC1);
}

int main(void)
{
    /* 初始化ADC */
    ADC_Config();

    while(1)
    {
        /* 读取ADC采样值 */
        uint16_t adc_value = ADC_ReadValue();

        /* 处理采样值 */
        // TODO

        /* 延时 */
        delay_ms(100);
    }

    return 0;
}