74HC595四位数码管显示stm32f103库代码共阳

以下是使用74HC595驱动共阳式4位数码管的STM32F103库代码：

#include "stm32f10x.h"

//定义74HC595的引脚连接
#define HC595_PORT  GPIOA
#define HC595_DS_PIN GPIO_Pin_0  // data pin
#define HC595_SHCP_PIN GPIO_Pin_1 // shift clock pin
#define HC595_STCP_PIN GPIO_Pin_2 // store clock pin

//定义数码管显示字符数组
const uint8_t num[10][8] = {
    {1,1,1,1,1,1,0,0}, // 0
    {0,1,1,0,0,0,0,0}, // 1
    {1,1,0,1,1,0,1,0}, // 2
    {1,1,1,1,0,0,1,0}, // 3
    {0,1,1,0,0,1,1,0}, // 4
    {1,0,1,1,0,1,1,0}, // 5
    {1,0,1,1,1,1,1,0}, // 6
    {1,1,1,0,0,0,0,0}, // 7
    {1,1,1,1,1,1,1,0}, // 8
    {1,1,1,1,0,1,1,0}  // 9
};

//发送数据到74HC595
void HC595_SendData(uint8_t data) {
    uint8_t i;
    for (i = 0; i < 8; i++) {
        if (data & 0x80) {
            GPIO_SetBits(HC595_PORT, HC595_DS_PIN);
        } else {
            GPIO_ResetBits(HC595_PORT, HC595_DS_PIN);
        }
        GPIO_SetBits(HC595_PORT, HC595_SHCP_PIN);
        GPIO_ResetBits(HC595_PORT, HC595_SHCP_PIN);
        data <<= 1;
    }
}

//锁存数据到74HC595
void HC595_LatchData(void) {
    GPIO_SetBits(HC595_PORT, HC595_STCP_PIN);
    GPIO_ResetBits(HC595_PORT, HC595_STCP_PIN);
}

//在数码管上显示一个数字
void DisplayNum(uint8_t num, uint8_t bit) {
    uint8_t i;
    for (i = 0; i < 8; i++) {
        if (num[bit][i]) {
            GPIO_SetBits(HC595_PORT, 1 << i);
        } else {
            GPIO_ResetBits(HC595_PORT, 1 << i);
        }
    }
    HC595_LatchData();
}

int main(void) {
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = HC595_DS_PIN | HC595_SHCP_PIN | HC595_STCP_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(HC595_PORT, &GPIO_InitStructure);

    while (1) {
        //显示数字0-9
        uint8_t i;
        for (i = 0; i < 10; i++) {
            DisplayNum(num, i);
            delay_ms(1000);
        }
    }
}

请注意，此代码仅作为参考。您需要根据实际硬件连接和需求进行相应的修改和调整。