stm32f103c8t6控制max7912 的8x8的音乐点阵频谱灯的程序

以下是一个简单的程序，使用STM32F103C8T6控制MAX7912芯片，实现8x8的音乐点阵频谱灯的控制：

#include "stm32f10x.h"
#include <stdio.h>

#define MAX7912_CS_LOW()   GPIO_ResetBits(GPIOA, GPIO_Pin_4)
#define MAX7912_CS_HIGH()  GPIO_SetBits(GPIOA, GPIO_Pin_4)

void SPI1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    // 配置SPI1接口的GPIO管脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置片选CS的GPIO管脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置SPI1接口
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

void MAX7912_Write(uint8_t reg, uint8_t value)
{
    MAX7912_CS_LOW();
    SPI1->DR = reg;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
    SPI1->DR = value;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
    MAX7912_CS_HIGH();
}

void MAX7912_Init(void)
{
    MAX7912_Write(0x0F, 0x00);  // 关闭显示测试模式
    MAX7912_Write(0x0C, 0x01);  // 打开普通模式
    MAX7912_Write(0x0B, 0x07);  // 设置扫描限制，扫描所有的行
    MAX7912_Write(0x09, 0xFF);  // 设置亮度
    MAX7912_Write(0x0A, 0x0F);  // 设置显示的数量为8个
}

void MAX7912_Clear(void)
{
    uint8_t i;
    for (i = 1; i <= 8; i++) {
        MAX7912_Write(i, 0x00);
    }
}

void MAX7912_Display(uint8_t *buffer)
{
    uint8_t i;
    for (i = 1; i <= 8; i++) {
        MAX7912_Write(i, buffer[i-1]);
    }
}

void TIM2_IRQHandler(void)
{
    static uint16_t counter = 0;
    static uint8_t buffer[8] = {0};

    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) {
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

        // 读取ADC值
        uint16_t adc_value = ADC_GetConversionValue(ADC1);

        // 计算音乐点阵频谱灯的显示值
        uint8_t i, j;
        for (i = 0; i < 8; i++) {
            uint8_t value = 0;
            uint16_t threshold = 256 * (i + 1) / 8;
            for (j = 0; j < 32; j++) {
                uint16_t sample = ADC_GetConversionValue(ADC1);
                if (sample > threshold) {
                    value |= 1 << j;
                }
            }
            buffer[i] = value;
        }

        // 显示音乐点阵频谱灯
        MAX7912_Display(buffer);

        counter++;
        if (counter == 500) {
            printf("ADC value = %d\n", adc_value);
            counter = 0;
        }
    }
}

int main(void)
{
    // 初始化SPI1接口和MAX7912芯片
    SPI1_Init();
    MAX7912_Init();

    // 初始化ADC
    GPIO_InitTypeDef GPIO_InitStructure;
    ADC_InitTypeDef ADC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE);

    // 配置ADC的GPIO管脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置ADC
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);
    ADC_Cmd(ADC1, ENABLE);
    ADC_ResetCalibration(ADC1);
    while (ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while (ADC_GetCalibrationStatus(ADC1));

    // 初始化定时器
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period = 999;
    TIM_TimeBaseStructure.TIM_Prescaler = 7199;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    TIM_Cmd(TIM2, ENABLE);

    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    while (1) {
        // 循环等待中断发生
    }
}

请注意，本程序只是一个简单的例子，可能需要根据您的具体应用做出一些修改。此外，如果您需要使用其他型号的MAX7912芯片，可能需要根据数据手册更改寄存器的值。