stm32f103c8t6利用AD8232的心电信号通过ST778显示心率的程序

以下是一个简单的程序示例，可以通过AD8232从心电信号中读取心率数据，并使用ST778显示心率。

首先，需要在STM32F103C8T6上设置ADC和SPI。在这个示例中，ADC1和SPI1被设置为使用PA1作为输入和PA5，PA6和PA7作为SPI输出。

#include "stm32f10x.h"

void ADC_Init(void)
{
    ADC_InitTypeDef ADC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    // Enable the ADC1 clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    // Configure the GPIOs
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Configure the ADC1
    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);

    // Configure the ADC1 channel1
    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_13Cycles5);

    // Enable the ADC1
    ADC_Cmd(ADC1, ENABLE);
}

uint16_t ADC_Read(void)
{
    // Start the conversion
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);

    // Wait for the conversion to complete
    while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));

    // Return the converted data
    return ADC_GetConversionValue(ADC1);
}

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

    // Enable the SPI1 clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

    // Configure the GPIOs
    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);

    // Configure the 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_Init(SPI1, &SPI_InitStructure);

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

void SPI_Send(uint8_t data)
{
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(SPI1, data);
}

void ST778_Init(void)
{
    SPI_Send(0x40); // Set display control
    SPI_Send(0x80); // Display off
    SPI_Send(0xA0); // Set multiplex ratio
    SPI_Send(0x3F); // 64 COM lines
    SPI_Send(0xA1); // Set column address
    SPI_Send(0x00); // Column start address
    SPI_Send(0x3F); // Column end address
    SPI_Send(0xA2); // Set row address
    SPI_Send(0x00); // Row start address
    SPI_Send(0x3F); // Row end address
    SPI_Send(0xA4); // Set display mode
    SPI_Send(0xA6); // Set normal display
    SPI_Send(0xAF); // Display on
}

void display(uint8_t data)
{
    SPI_Send(0xB0 | (data & 0x0F)); // Set page address
    SPI_Send(0x10 | ((data >> 4) & 0x07)); // Set column address
    SPI_Send(0x00); // Dummy byte
    SPI_Send(0x00); // Dummy byte
}

int main(void)
{
    ADC_Init();
    SPI_Init();
    ST778_Init();

    while(1)
    {
        uint16_t data = ADC_Read();
        uint8_t heart_rate = (uint8_t)(60000 / (float)data); // Calculate the heart rate in beats per minute
        display(0);
        SPI_Send(heart_rate / 10 + '0'); // Display the tens digit
        SPI_Send(heart_rate % 10 + '0'); // Display the ones digit
    }
}

注意，这只是一个简单的示例程序，需要根据您的硬件设置进行修改和优化。您还需要根据AD8232的规格说明进行配置和校准，以确保正确读取心电信号。