基于STC12C5A60S2写一份MAX30102使用P15,16引脚的代码

以下基于STC12C5A60S2芯片的MAX30102使用P15、P16引脚的代码，供参考：

#include <STC12C5A60S2.H>
#include <intrins.h>

#define uint8_t unsigned char
#define uint16_t unsigned int
#define uint32_t unsigned long
#define bool bit
#define true 1
#define false 0

#define SCL P1_5
#define SDA P1_4
#define ADDR 0xAE

#define I2C_DELAY() _nop_()

void delay_ms(uint16_t ms) {
    uint16_t i, j;
    for (i = ms; i > 0; i--) {
        for (j = 110; j > 0; j--);
    }
}

void i2c_start() {
    SDA = 1;
    SCL = 1;
    I2C_DELAY();
    SDA = 0;
    I2C_DELAY();
    SCL = 0;
    I2C_DELAY();
}

void i2c_stop() {
    SDA = 0;
    SCL = 1;
    I2C_DELAY();
    SDA = 1;
    I2C_DELAY();
}

void i2c_write_byte(uint8_t data) {
    uint8_t i;
    for (i = 0; i < 8; i++) {
        SDA = (data & 0x80) >> 7;
        data <<= 1;
        SCL = 1;
        I2C_DELAY();
        SCL = 0;
        I2C_DELAY();
    }
    SDA = 1;
    SCL = 1;
    I2C_DELAY();
    SCL = 0;
    I2C_DELAY();
}

uint8_t i2c_read_byte(bool ack) {
    uint8_t i, data = 0;
    SDA = 1;
    for (i = 0; i < 8; i++) {
        SCL = 1;
        I2C_DELAY();
        data = (data << 1) | SDA;
        SCL = 0;
        I2C_DELAY();
    }
    SDA = ack ? 0 : 1;
    SCL = 1;
    I2C_DELAY();
    SCL = 0;
    I2C_DELAY();
    return data;
}

bool max30102_init() {
    i2c_start();
    i2c_write_byte(ADDR << 1 | 0x00); //写I2C地址
    i2c_write_byte(0x06); //写配置寄存器1
    i2c_write_byte(0x03); //设置采样率为50Hz
    i2c_stop();

    i2c_start();
    i2c_write_byte(ADDR << 1 | 0x00); //写I2C地址
    i2c_write_byte(0x07); //写配置寄存器2
    i2c_write_byte(0x03); //设置LED1和LED2驱动电流
    i2c_stop();

    i2c_start();
    i2c_write_byte(ADDR << 1 | 0x00); //写I2C地址
    i2c_write_byte(0x08); //写配置寄存器3
    i2c_write_byte(0x07); //设置LED3和LED4驱动电流
    i2c_stop();

    return true;
}

void max30102_read_fifo(uint32_t *red, uint32_t *ir) {
    uint32_t data;
    *red = 0;
    *ir = 0;
    i2c_start();
    i2c_write_byte(ADDR << 1 | 0x00); //写I2C地址
    i2c_write_byte(0x02); //写FIFO数据寄存器指针
    i2c_stop();

    i2c_start();
    i2c_write_byte(ADDR << 1 | 0x01); //读I2C地址
    data = i2c_read_byte(true) << 16;
    data |= i2c_read_byte(true) << 8;
    data |= i2c_read_byte(false);
    *red = data & 0x3FFFF;

    data = i2c_read_byte(true) << 16;
    data |= i2c_read_byte(true) << 8;
    data |= i2c_read_byte(false);
    *ir = data & 0x3FFFF;
    i2c_stop();
}

void main() {
    uint32_t red, ir;
    P1M1 = 0x00;
    P1M0 = 0xFF;
    max30102_init();
    while (true) {
        max30102_read_fifo(&red, &ir);
        //在这里处理红光和红外光信号
        delay_ms(10);
    }
}

注意：以上代码仅供参考，具体实现可能需要根据实际情况进行修改。