STM32 MAX30100心率血氧传感模块的测试程序IIC（温度和模块ID采集）_陌岸花香

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STM32 MAX30100心率血氧传感模块的测试程序IIC（温度和模块ID采集）

(2017-02-03 23:59:54)

标签：

it

#include "max30100.h"

#include "usart.h"

#include "delay.h"

#define BIT(n) ((0x01)<<(n))

#define MAX10300_WR_address 0xAE

#define MAX30100_REG_INT_STATUS 0x00

#define MAX30100_REG_INT_STATUS_PWR_RDY BIT(0)

#define MAX30100_REG_INT_STATUS_SPO2_RDY BIT(4)

#define MAX30100_REG_INT_STATUS_HR_RDY BIT(5)

#define MAX30100_REG_INT_STATUS_TEMP_RDY BIT(6)

#define MAX30100_REG_INT_STATUS_A_FULL BIT(7)

#define MAX30100_REG_INT_ENABLE 0x01 //bit3~bit0 should be set to zero

#define MAX30100_REG_INT_ENABLE_SPO2_RDY BIT(4)

#define MAX30100_REG_INT_ENABLE_HR_RDY BIT(5)

#define MAX30100_REG_INT_ENABLE_TEP_RDY BIT(6)

#define MAX30100_REG_INT_ENABLE_A_FULL BIT(7)

#define MAX30100_REG_FIFO_WR_PTR 0x02 //FIFO_WR_PTR[3:0]

#define MAX30100_REG_FIFO_OF_CTR 0x03 //OVF_COUNTER[3:0] up to 0xF

#define MAX30100_REG_FIFO_RD_PTR 0x04 //FIFO_RD_PTR[3:0] only this should be writen

#define MAX30100_REG_FIFO_DATA 0x05 //FIFO_DATA[7:0]

//each sample is 4 bytes of data ,this register has to be read 4 times to get one sample

#define MAX30100_REG_FIFO_DATA_ENTRY_COUNT 16

#define MAX30100_REG_FIFO_DATA_ENTRY_LEN 4

#define MAX30100_REG_MODE_CONFIG 0x06

#define MAX30100_REG_MODE_CONFIG_MODE_SPO2_EN BIT(0)

#define MAX30100_REG_MODE_CONFIG_MODE_HR_EN BIT(1) //MODE[2:0]

#define MAX30100_REG_MODE_CONFIG_MODE_MASK 0x03

#define MAX30100_REG_MODE_CONFIG_TEMP_EN BIT(3)

#define MAX30100_REG_MODE_CONFIG_PWR BIT(7)

#define MAX30100_REG_SPO2_CONFIG 0x07

#define MAX30100_REG_SPO2_CONFIG_100HZ BIT(2)

#define MAX30100_REG_SPO2_CONFIG_HI_RES_EN BIT(6)

#define MAX30100_REG_SPO2_CONFIG_1600US 0x03

#define MAX30100_REG_LED_CONFIG 0x09

#define MAX30100_REG_LED_CONFIG_LED_MASK 0x0f

#define MAX30100_REG_LED_CONFIG_RED_LED_SHIFT 4

#define MAX30100_REG_LED_CONFIG_24MA 0x07

#define MAX30100_REG_LED_CONFIG_50MA 0x0f

#define MAX30100_REG_TEMP_INTEGER 0x16

#define MAX30100_REG_TEMP_FRACTION 0x17

#define MAX30100_REG_REVISION_ID 0xFE

#define MAX30100_REG_PART_ID 0xFF

int rda;

unsigned char IIC_ACK;

void IIC_Init(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //PB7 SDA

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_SetBits(GPIOB,GPIO_Pin_7);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //PB6 SCL

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_SetBits(GPIOB,GPIO_Pin_6);

}

//START:when CLK is high,DATA change form high to low

void IIC_Start(void)

{

SDA_OUT();

IIC_SDA=1;

delay_us(2);

IIC_SCL=1;

delay_us(2);

IIC_SDA=0;

delay_us(2);

IIC_SCL=0;

delay_us(2);

}

//STOP:when CLK is high DATA change form low to high

void IIC_Stop(void)

{

SDA_OUT();

IIC_SCL=0;

delay_us(2);

IIC_SDA=0;

delay_us(2);

IIC_SCL=1;

delay_us(2);

IIC_SDA=1;

delay_us(2);

}

void IIC_SendByte(unsigned char txd)

{

unsigned char t;

SDA_OUT();

for(t=0;t<8;t++)

{

if((txd<<t)&0x80)

IIC_SDA=1;

else

IIC_SDA=0;

delay_us(2);

IIC_SCL=1;

delay_us(2);

IIC_SCL=0;

}

delay_us(2);

IIC_SDA=1;

delay_us(2);

IIC_SCL=1;

delay_us(2);

if(IIC_SDA==0)

IIC_ACK=0;

else

IIC_ACK=1;

IIC_SCL=0;

delay_us(2);

}

unsigned char IIC_Read_Byte(unsigned char ack)

{

unsigned char i,receive=0;

SDA_OUT();

IIC_SDA=1;

SDA_IN();

for(i=0;i<8;i++ )

{

delay_us(2);

IIC_SCL=0;

delay_us(2);

IIC_SCL=1;

delay_us(2);

receive=receive<<1;

if(READ_SDA)receive++;

delay_us(2);

}

if (!ack)

{

delay_us(2);

IIC_SCL=0;

delay_us(2);

IIC_SDA=1;

delay_us(2);

IIC_SCL=1;

delay_us(2);

IIC_SCL=0;

delay_us(2);

}

else

{

delay_us(2);

IIC_SCL=0;

delay_us(2);

IIC_SDA=0;

delay_us(2);

IIC_SCL=1;

delay_us(2);

IIC_SCL=0;

delay_us(2);

}

return receive;

}

void WR_MAX30100_Byte(int address,int saddress,int W_Data)

{

delay_us(2);

IIC_Start();

delay_us(2);

IIC_SendByte(address);

delay_us(2);

IIC_SendByte(saddress);

delay_us(2);

IIC_SendByte(W_Data);

delay_us(2);

IIC_Stop();

delay_us(2);

}

void RD_MAX30100_Byte(int address,int saddress)

{

IIC_Start();

delay_us(2);

IIC_SendByte(address);

delay_us(2);

IIC_SendByte(saddress);

address+=1;

delay_us(2);

IIC_Start();

delay_us(2);

IIC_SendByte(address);

delay_us(2);

rda=IIC_Read_Byte(0);

delay_us(2);

IIC_Stop();

}

void max30100_test(void)

{

double temp,temp1,temp2;

WR_MAX30100_Byte(MAX10300_WR_address,MAX30100_REG_MODE_CONFIG,MAX30100_REG_MODE_CONFIG_MODE_HR_EN|MAX30100_REG_MODE_CONFIG_TEMP_EN);//0000 1010

delay_ms(20);

RD_MAX30100_Byte(MAX10300_WR_address,MAX30100_REG_TEMP_INTEGER);//0001 0110

temp1=rda;

RD_MAX30100_Byte(MAX10300_WR_address,MAX30100_REG_TEMP_FRACTION);

temp2=rda;

temp=temp1+(temp2/100);

printf("temp=%.2f\r\n",temp);

RD_MAX30100_Byte(MAX10300_WR_address,MAX30100_REG_PART_ID);

printf("MAX30100 PART_ID =%d\r\n",rda);

RD_MAX30100_Byte(MAX10300_WR_address,MAX30100_REG_REVISION_ID);

printf("MAX30100 REVISION_ID =%d\r\n",rda);

delay_ms(1000);

}

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