STM32传感器外设集--心率模块（MAX30102）(1)

最新推荐文章于 2025-04-30 14:38:07 发布

2401_85013863

最新推荐文章于 2025-04-30 14:38:07 发布

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分类专栏： 2024年程序员学习文章标签：物联网嵌入式硬件面试

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// u8 fifo_wr_ptr;
// u8 firo_rd_ptr;
// u8 number_tp_read;
// //Get the FIFO_WR_PTR
// fifo_wr_ptr = max30102_Bus_Read(REG_FIFO_WR_PTR);
// //Get the FIFO_RD_PTR
// firo_rd_ptr = max30102_Bus_Read(REG_FIFO_RD_PTR);
//
// number_tp_read = fifo_wr_ptr - firo_rd_ptr;
//
// //for(i=0;i<number_tp_read;i++){
// if(number_tp_read>0){
// IIC_ReadBytes(max30102_WR_address,REG_FIFO_DATA,Data,6);
// }

//max30102_Bus_Write(REG_FIFO_RD_PTR,fifo_wr_ptr);

}

void max30102_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);	
GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOB, &GPIO_InitStructure);

IIC_Init();

max30102_reset();

// max30102_Bus_Write(REG_MODE_CONFIG, 0x0b); //mode configuration : temp_en[3] MODE[2:0]=010 HR only enabled 011 SP02 enabled
// max30102_Bus_Write(REG_INTR_STATUS_2, 0xF0); //open all of interrupt
// max30102_Bus_Write(REG_INTR_STATUS_1, 0x00); //all interrupt clear
// max30102_Bus_Write(REG_INTR_ENABLE_2, 0x02); //DIE_TEMP_RDY_EN
// max30102_Bus_Write(REG_TEMP_CONFIG, 0x01); //SET TEMP_EN

// max30102_Bus_Write(REG_SPO2_CONFIG, 0x47); //SPO2_SR[4:2]=001 100 per second LED_PW[1:0]=11 16BITS

// max30102_Bus_Write(REG_LED1_PA, 0x47);
// max30102_Bus_Write(REG_LED2_PA, 0x47);

max30102_Bus_Write(REG_INTR_ENABLE_1,0xc0);	// INTR setting
max30102_Bus_Write(REG_INTR_ENABLE_2,0x00);
max30102_Bus_Write(REG_FIFO_WR_PTR,0x00);  	//FIFO_WR_PTR[4:0]
max30102_Bus_Write(REG_OVF_COUNTER,0x00);  	//OVF_COUNTER[4:0]
max30102_Bus_Write(REG_FIFO_RD_PTR,0x00);  	//FIFO_RD_PTR[4:0]
max30102_Bus_Write(REG_FIFO_CONFIG,0x0f);  	//sample avg = 1, fifo rollover=false, fifo almost full = 17
max30102_Bus_Write(REG_MODE_CONFIG,0x03);  	//0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED
max30102_Bus_Write(REG_SPO2_CONFIG,0x27);  	// SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS)  
max30102_Bus_Write(REG_LED1_PA,0x24);   	//Choose value for ~ 7mA for LED1
max30102_Bus_Write(REG_LED2_PA,0x24);   	// Choose value for ~ 7mA for LED2
max30102_Bus_Write(REG_PILOT_PA,0x7f);   	// Choose value for ~ 25mA for Pilot LED

// // Interrupt Enable 1 Register. Set PPG_RDY_EN (data available in FIFO)
// max30102_Bus_Write(0x2, 1<<6);

// // FIFO configuration register
// // SMP_AVE: 16 samples averaged per FIFO sample
// // FIFO_ROLLOVER_EN=1
// //max30102_Bus_Write(0x8, 1<<4);
// max30102_Bus_Write(0x8, (0<<5) | 1<<4);

// // Mode Configuration Register
// // SPO2 mode
// max30102_Bus_Write(0x9, 3);

// // SPO2 Configuration Register
// max30102_Bus_Write(0xa,
// (3<<5) // SPO2_ADC_RGE 2 = full scale 8192 nA (LSB size 31.25pA); 3 = 16384nA
// | (1<<2) // sample rate: 0 = 50sps; 1 = 100sps; 2 = 200sps
// | (3<<0) // LED_PW 3 = 411μs, ADC resolution 18 bits
// );

// // LED1 (red) power (0 = 0mA; 255 = 50mA)
// max30102_Bus_Write(0xc, 0xb0);

// // LED (IR) power
// max30102_Bus_Write(0xd, 0xa0);

}

void max30102_reset(void)
{
max30102_Bus_Write(REG_MODE_CONFIG,0x40);
max30102_Bus_Write(REG_MODE_CONFIG,0x40);
}

void maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)
{
// char ach_i2c_data[2];
// ach_i2c_data[0]=uch_addr;
// ach_i2c_data[1]=uch_data;
//
// IIC_WriteBytes(I2C_WRITE_ADDR, ach_i2c_data, 2);
IIC_Write_One_Byte(I2C_WRITE_ADDR,uch_addr,uch_data);
}

void maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *puch_data)
{
// char ch_i2c_data;
// ch_i2c_data=uch_addr;
// IIC_WriteBytes(I2C_WRITE_ADDR, &ch_i2c_data, 1);
//
// i2c.read(I2C_READ_ADDR, &ch_i2c_data, 1);
//
// *puch_data=(uint8_t) ch_i2c_data;
IIC_Read_One_Byte(I2C_WRITE_ADDR,uch_addr,puch_data);
}

void maxim_max30102_read_fifo(uint32_t *pun_red_led, uint32_t *pun_ir_led)
{
uint32_t un_temp;
unsigned char uch_temp;
char ach_i2c_data[6];
*pun_red_led=0;
*pun_ir_led=0;

//read and clear status register
maxim_max30102_read_reg(REG_INTR_STATUS_1, &uch_temp);
maxim_max30102_read_reg(REG_INTR_STATUS_2, &uch_temp);

IIC_ReadBytes(I2C_WRITE_ADDR,REG_FIFO_DATA,(u8 *)ach_i2c_data,6);

un_temp=(unsigned char) ach_i2c_data[0];
un_temp<<=16;
*pun_red_led+=un_temp;
un_temp=(unsigned char) ach_i2c_data[1];
un_temp<<=8;
*pun_red_led+=un_temp;
un_temp=(unsigned char) ach_i2c_data[2];
*pun_red_led+=un_temp;

un_temp=(unsigned char) ach_i2c_data[3];
un_temp<<=16;
*pun_ir_led+=un_temp;
un_temp=(unsigned char) ach_i2c_data[4];
un_temp<<=8;
*pun_ir_led+=un_temp;
un_temp=(unsigned char) ach_i2c_data[5];
*pun_ir_led+=un_temp;
*pun_red_led&=0x03FFFF; //Mask MSB [23:18]
*pun_ir_led&=0x03FFFF; //Mask MSB [23:18]
}