使用stm32f103r6通过74hc595控制一位led数码管从0到9循环显示并且使用spi方式通讯 写出keil代码

以下是使用STM32F103R6和74HC595控制数码管并使用SPI通讯的Keil代码：

#include "stm32f10x.h"

#define CS_PIN      GPIO_Pin_4
#define CS_PORT     GPIOA
#define MOSI_PIN    GPIO_Pin_7
#define MOSI_PORT   GPIOA
#define SCK_PIN     GPIO_Pin_5
#define SCK_PORT    GPIOA

void delay_ms(uint32_t ms)
{
    uint32_t i;
    for(i = 0; i < ms; i++)
    {
        uint32_t j;
        for(j = 0; j < 7200; j++);
    }
}

void spi_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    /* Enable SPI1 and GPIOA clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure SPI MOSI, SCK and CS pins */
    GPIO_InitStructure.GPIO_Pin = MOSI_PIN | SCK_PIN | CS_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure SPI1 */
    SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    /* Enable SPI1 */
    SPI_Cmd(SPI1, ENABLE);
}

void spi_write(uint8_t data)
{
    /* Enable CS */
    GPIO_ResetBits(CS_PORT, CS_PIN);

    /* Write data */
    SPI_I2S_SendData(SPI1, data);

    /* Wait for transmission to complete */
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

    /* Disable CS */
    GPIO_SetBits(CS_PORT, CS_PIN);
}

void shift_out(uint8_t data)
{
    uint8_t i;
    for(i = 0; i < 8; i++)
    {
        GPIO_ResetBits(SCK_PORT, SCK_PIN);
        GPIO_WriteBit(MOSI_PORT, MOSI_PIN, (data & (1 << (7 - i))) ? Bit_SET : Bit_RESET);
        GPIO_SetBits(SCK_PORT, SCK_PIN);
    }
}

void digit_display(uint8_t digit)
{
    static uint8_t digits[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};

    /* Set shift register to output mode */
    spi_write(0x09);

    /* Shift out digit pattern */
    shift_out(digits[digit]);

    /* Latch data to outputs */
    spi_write(0x0C);
}

int main(void)
{
    uint8_t i;

    /* Initialize SPI and delay */
    spi_init();
    delay_ms(50);

    while(1)
    {
        /* Loop from 0 to 9 */
        for(i = 0; i < 10; i++)
        {
            digit_display(i);
            delay_ms(1000);
        }
    }
}

该代码中，使用SPI1控制74HC595芯片，并使用GPIO控制74HC595的串行数据输入（MOSI）和时钟（SCK）线。在digit_display函数中，将要显示的数字转换为相应的数码管模式，并将其写入74HC595芯片。然后使用spi_write函数以SPI方式将数据写入74HC595芯片。