[设计过程分享] MAX32630FTHR设计笔记（11）：血氧传感器MAX30102采集人体血氧浓度和心率（C语言版...

Justice_Gao 2017-9-21 21:49 楼主

max30102的原理我就不解释了，现在网上能够下载或者共享的MAX30102程序源代码，全部是基于mbed的，编程语言为C++类型，如果使用KEIL或者IAR调试这些基于mbed导出后的程序，非常不方便，也不能很好的将MAX30102驱动程序应用到基于C语言的51单片机、STM32单片机，甚至用IAR和KEIL等C语言开发的平台，不能很好将MAX30102与自己的程序进行结合，现在，福利来了，给你共享一下，基于KEIL C语言的MAX30102驱动，以及采集人体血氧浓度和心率的测试程序。（1）首先来看，网络上共享的基于mbed的C++类型的max30102驱动程序，第一个algorithm.cpp为血氧和心率的计算算法，可以直接调用过了，无需做任何改变，只需将文件改为algorithm.c即可。

第二个main.cpp文件改成一下代码

/**
* @file main.c
* @brief 低功耗设计,程序实现舒眠科技智眠传感带信号采集和呼吸，心跳提取功能，实现和上位设备的通信功能
*/
//作者：Justice
//版本：V1.0.0
//日期：2017-05-25
//工具：Keil MDK 5.23
//修改日期：2017-06-28
//修改内容：不修改底层源代码，把需要改的函数放在相应的自定义文件中
//修改日期：2017-06-29
//修改内容：增加了BootLoader程序，支持IAP升级
/***** Includes *****/
#include "Com.h"
#define REPORTING_PERIOD_MS 1000
const uint8_t Test_Buff[10] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A};
uint32_t aun_ir_buffer[500]; //IR LED sensor data
int32_t n_ir_buffer_length; //data length
uint32_t aun_red_buffer[500]; //Red LED sensor data
int32_t n_sp02; //SPO2 value
int8_t ch_spo2_valid; //indicator to show if the SP02 calculation is valid
int32_t n_heart_rate; //heart rate value
int8_t ch_hr_valid; //indicator to show if the heart rate calculation is valid
uint8_t uch_dummy;
#define MAX_BRIGHTNESS 255
#define false 0
#define true 1
int main(void)
{
uint32_t un_min, un_max, un_prev_data; //variables to calculate the on-board LED brightness that reflects the heartbeats
int i;
int32_t n_brightness;
float f_temp;
USART2_Configuration(115200);
I2CM_Init(MAX14690_I2CM, &max14690_sys_cfg, I2CM_SPEED_100KHZ);
I2CM_Init(MXC_I2CM1, &max30102_sys_cfg, I2CM_SPEED_100KHZ);
//Device_Hardware_Init();
maxim_max30102_reset(); //resets the MAX30102
//read and clear status register
maxim_max30102_read_reg(0,&uch_dummy);
maxim_max30102_init(); //initializes the MAX30102
n_brightness=0;
un_min=0x3FFFF;
un_max=0;
n_ir_buffer_length=500; //buffer length of 100 stores 5 seconds of samples running at 100sps
//read the first 500 samples, and determine the signal range
for(i=0;i<n_ir_buffer_length;i++)
{
//while(INT.read()==1); //wait until the interrupt pin asserts
maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i)); //read from MAX30102 FIFO
if(un_min>aun_red_buffer[i])[/i]
[i] un_min=aun_red_buffer; //update signal min[/i]
[i] if(un_max<aun_red_buffer)[/i]
[i] un_max=aun_red_buffer; //update signal max[/i]
[i] printf("red=");[/i]
[i] printf("%i", aun_red_buffer);[/i]
[i] printf(", ir=");[/i]
[i] printf("%i\n\r", aun_ir_buffer);[/i]
[i] }[/i]
[i] un_prev_data=aun_red_buffer;[/i]
[i] //calculate heart rate and SpO2 after first 500 samples (first 5 seconds of samples)[/i]
[i] maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid); [/i]
[i] //Continuously taking samples from MAX30102. Heart rate and SpO2 are calculated every 1 second[/i]
[i] while(1)[/i]
[i] {[/i]
[i] i=0;[/i]
[i] un_min=0x3FFFF;//???[/i]
[i] un_max=0;[/i]
[i] //dumping the first 100 sets of samples in the memory and shift the last 400 sets of samples to the top[/i]
[i] for(i=100;i<500;i++)[/i]
[i] {[/i]
[i] aun_red_buffer[i-100]=aun_red_buffer;[/i]
[i] aun_ir_buffer[i-100]=aun_ir_buffer;[/i]
[i] //update the signal min and max[/i]
[i] if(un_min>aun_red_buffer)[/i]
[i] un_min=aun_red_buffer;[/i]
[i] if(un_max<aun_red_buffer)[/i]
[i] un_max=aun_red_buffer;[/i]
[i] }[/i]
[i] //take 100 sets of samples before calculating the heart rate.[/i]
[i] for(i=400;i<500;i++)[/i]
[i] {[/i]
[i] un_prev_data=aun_red_buffer[i-1];[/i]
[i] // while(INT.read()==1);[/i]
[i] maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i));[/i]
[i] if(aun_red_buffer>un_prev_data)//just to determine the brightness of LED according to the deviation of adjacent two AD data[/i]
[i] {[/i]
[i] f_temp=aun_red_buffer-un_prev_data;[/i]
[i] f_temp/=(un_max-un_min);[/i]
[i] f_temp*=MAX_BRIGHTNESS;[/i]
[i] n_brightness-=(int)f_temp;[/i]
[i] if(n_brightness<0)[/i]
[i] n_brightness=0;[/i]
[i] }[/i]
[i] else[/i]
[i] {[/i]
[i] f_temp=un_prev_data-aun_red_buffer;[/i]
[i] f_temp/=(un_max-un_min);[/i]
[i] f_temp*=MAX_BRIGHTNESS;[/i]
[i] n_brightness+=(int)f_temp;[/i]
[i] if(n_brightness>MAX_BRIGHTNESS)[/i]
[i] n_brightness=MAX_BRIGHTNESS;[/i]
[i] }[/i]
[i] //led.write(1-(float)n_brightness/256);//pwm control led brightness[/i]
[i] //send samples and calculation result to terminal program through UART[/i]
[i] printf("red=");[/i]
[i] printf("%i", aun_red_buffer);[/i]
[i] printf(", ir=");[/i]
[i] printf("%i", aun_ir_buffer);[/i]
[i] printf(", HR=%i, ", n_heart_rate); [/i]
[i] printf("HRvalid=%i, ", ch_hr_valid);[/i]
[i] printf("SpO2=%i, ", n_sp02);[/i]
[i] printf("SPO2Valid=%i\n\r", ch_spo2_valid);[/i]
[i] }[/i]
[i] maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid); [/i]
[i] }[/i]
[i]}[/i]
[i]

第三个文件max30102.cpp是重点，先给出max30102.cpp的源代码： /** \file max30102.cpp ******************************************************[/i]
[i]*[/i]
[i]* Project: MAXREFDES117#[/i]
[i]* Filename: max30102.cpp[/i]
[i]* Description: This module is an embedded controller driver for the MAX30102[/i]
[i]*[/i]
[i]*[/i]
[i]* --------------------------------------------------------------------[/i]
[i]*[/i]
[i]* This code follows the following naming conventions:[/i]
[i]*[/i]
[i]* char ch_pmod_value[/i]
[i]* char (array) s_pmod_s_string[16][/i]
[i]* float f_pmod_value[/i]
[i]* int32_t n_pmod_value[/i]
[i]* int32_t (array) an_pmod_value[16][/i]
[i]* int16_t w_pmod_value[/i]
[i]* int16_t (array) aw_pmod_value[16][/i]
[i]* uint16_t uw_pmod_value[/i]
[i]* uint16_t (array) auw_pmod_value[16][/i]
[i]* uint8_t uch_pmod_value[/i]
[i]* uint8_t (array) auch_pmod_buffer[16][/i]
[i]* uint32_t un_pmod_value[/i]
[i]* int32_t * pn_pmod_value[/i]
[i]*[/i]
[i]* ------------------------------------------------------------------------- */[/i]
[i]/*******************************************************************************[/i]
[i]* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.[/i]
[i]*[/i]
[i]* Permission is hereby granted, free of charge, to any person obtaining a[/i]
[i]* copy of this software and associated documentation files (the "Software"),[/i]
[i]* to deal in the Software without restriction, including without limitation[/i]
[i]* the rights to use, copy, modify, merge, publish, distribute, sublicense,[/i]
[i]* and/or sell copies of the Software, and to permit persons to whom the[/i]
[i]* Software is furnished to do so, subject to the following conditions:[/i]
[i]*[/i]
[i]* The above copyright notice and this permission notice shall be included[/i]
[i]* in all copies or substantial portions of the Software.[/i]
[i]*[/i]
[i]* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS[/i]
[i]* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF[/i]
[i]* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.[/i]
[i]* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES[/i]
[i]* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,[/i]
[i]* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR[/i]
[i]* OTHER DEALINGS IN THE SOFTWARE.[/i]
[i]*[/i]
[i]* Except as contained in this notice, the name of Maxim Integrated[/i]
[i]* Products, Inc. shall not be used except as stated in the Maxim Integrated[/i]
[i]* Products, Inc. Branding Policy.[/i]
[i]*[/i]
[i]* The mere transfer of this software does not imply any licenses[/i]
[i]* of trade secrets, proprietary technology, copyrights, patents,[/i]
[i]* trademarks, maskwork rights, or any other form of intellectual[/i]
[i]* property whatsoever. Maxim Integrated Products, Inc. retains all[/i]
[i]* ownership rights.[/i]
[i]*******************************************************************************[/i]
[i]*/[/i]
[i]#include "mbed.h"[/i]
[i]#include "MAX30102.h"[/i]

[i]I2C i2c(P3_4, P3_5);[/i]

[i]bool maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)[/i]
[i]/**[/i]
[i]* \brief Write a value to a MAX30102 register[/i]
[i]* \par Details[/i]
[i]* This function writes a value to a MAX30102 register[/i]
[i]*[/i]
[i]* \param[in] uch_addr - register address[/i]
[i]* \param[in] uch_data - register data[/i]
[i]*[/i]
[i]* \retval true on success[/i]
[i]*/[/i]
[i]{[/i]
[i] char ach_i2c_data[2];[/i]
[i] ach_i2c_data[0]=uch_addr;[/i]
[i] ach_i2c_data[1]=uch_data;[/i]

[i] if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 2, false)==0)[/i]
[i] return true;[/i]
[i] else[/i]
[i] return false;[/i]
[i]}[/i]

[i]bool maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *puch_data)[/i]
[i]/**[/i]
[i]* \brief Read a MAX30102 register[/i]
[i]* \par Details[/i]
[i]* This function reads a MAX30102 register[/i]
[i]*[/i]
[i]* \param[in] uch_addr - register address[/i]
[i]* \param[out] puch_data - pointer that stores the register data[/i]
[i]*[/i]
[i]* \retval true on success[/i]
[i]*/[/i]
[i]{[/i]
[i] char ch_i2c_data;[/i]
[i] ch_i2c_data=uch_addr;[/i]
[i] if(i2c.write(I2C_WRITE_ADDR, &ch_i2c_data, 1, true)!=0)[/i]
[i] return false;[/i]
[i] if(i2c.read(I2C_READ_ADDR, &ch_i2c_data, 1, false)==0)[/i]
[i] {[/i]
[i] *puch_data=(uint8_t) ch_i2c_data;[/i]
[i] return true;[/i]
[i] }[/i]
[i] else[/i]
[i] return false;[/i]
[i]}[/i]

[i]bool maxim_max30102_init()[/i]
[i]/**[/i]
[i]* \brief Initialize the MAX30102[/i]
[i]* \par Details[/i]
[i]* This function initializes the MAX30102[/i]
[i]*[/i]
[i]* \param None[/i]
[i]*[/i]
[i]* \retval true on success[/i]
[i]*/[/i]
[i]{[/i]
[i] if(!maxim_max30102_write_reg(REG_INTR_ENABLE_1,0xc0)) // INTR setting[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_INTR_ENABLE_2,0x00))[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_FIFO_WR_PTR,0x00)) //FIFO_WR_PTR[4:0][/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_OVF_COUNTER,0x00)) //OVF_COUNTER[4:0][/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_FIFO_RD_PTR,0x00)) //FIFO_RD_PTR[4:0][/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_FIFO_CONFIG,0x0f)) //sample avg = 1, fifo rollover=false, fifo almost full = 17[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x03)) //0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_SPO2_CONFIG,0x27)) // SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS)[/i]
[i] return false;[/i]

[i] if(!maxim_max30102_write_reg(REG_LED1_PA,0x24)) //Choose value for ~ 7mA for LED1[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_LED2_PA,0x24)) // Choose value for ~ 7mA for LED2[/i]
[i] return false;[/i]
[i] if(!maxim_max30102_write_reg(REG_PILOT_PA,0x7f)) // Choose value for ~ 25mA for Pilot LED[/i]
[i] return false;[/i]
[i] return true; [/i]
[i]}[/i]

[i]bool maxim_max30102_read_fifo(uint32_t *pun_red_led, uint32_t *pun_ir_led)[/i]
[i]/**[/i]
[i]* \brief Read a set of samples from the MAX30102 FIFO register[/i]
[i]* \par Details[/i]
[i]* This function reads a set of samples from the MAX30102 FIFO register[/i]
[i]*[/i]
[i]* \param[out] *pun_red_led - pointer that stores the red LED reading data[/i]
[i]* \param[out] *pun_ir_led - pointer that stores the IR LED reading data[/i]
[i]*[/i]
[i]* \retval true on success[/i]
[i]*/[/i]
[i]{[/i]
[i] uint32_t un_temp;[/i]
[i] unsigned char uch_temp;[/i]
[i] *pun_red_led=0;[/i]
[i] *pun_ir_led=0;[/i]
[i] char ach_i2c_data[6];[/i]

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

[i] ach_i2c_data[0]=REG_FIFO_DATA;[/i]
[i] if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 1, true)!=0)[/i]
[i] return false;[/i]
[i] if(i2c.read(I2C_READ_ADDR, ach_i2c_data, 6, false)!=0)[/i]
[i] {[/i]
[i] return false;[/i]
[i] }[/i]
[i] un_temp=(unsigned char) ach_i2c_data[0];[/i]
[i] un_temp<<=16;[/i]
[i] *pun_red_led+=un_temp;[/i]
[i] un_temp=(unsigned char) ach_i2c_data[1];[/i]
[i] un_temp<<=8;[/i]
[i] *pun_red_led+=un_temp;[/i]
[i] un_temp=(unsigned char) ach_i2c_data[2];[/i]
[i] *pun_red_led+=un_temp;[/i]

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

[i] return true;[/i]
[i]}[/i]

[i]bool maxim_max30102_reset()[/i]
[i]/**[/i]
[i]* \brief Reset the MAX30102[/i]
[i]* \par Details[/i]
[i]* This function resets the MAX30102[/i]
[i]*[/i]
[i]* \param None[/i]
[i]*[/i]
[i]* \retval true on success[/i]
[i]*/[/i]
[i]{[/i]
[i] if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x40))[/i]
[i] return false;[/i]
[i] else[/i]
[i] return true; [/i]
[i]}[/i]
[i]
移植改编后的程序为：

/***********************************************
@from Justice_Gao
***********************************************/
#include "Com.h"
/** \file max30102.cpp ******************************************************
*
* Project: MAXREFDES117#
* Filename: max30102.cpp
* Description: This module is an embedded controller driver for the MAX30102
*
*
* --------------------------------------------------------------------
*
* This code follows the following naming conventions:
*
* char ch_pmod_value
* char (array) s_pmod_s_string[16]
* float f_pmod_value
* int32_t n_pmod_value
* int32_t (array) an_pmod_value[16]
* int16_t w_pmod_value
* int16_t (array) aw_pmod_value[16]
* uint16_t uw_pmod_value
* uint16_t (array) auw_pmod_value[16]
* uint8_t uch_pmod_value
* uint8_t (array) auch_pmod_buffer[16]
* uint32_t un_pmod_value
* int32_t * pn_pmod_value
*
* ------------------------------------------------------------------------- */
/*******************************************************************************
* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
*******************************************************************************
*/
#include "MAX30100.h"
#include "i2cm.h"
#define MBED_ASSERT(expr) ((void)0)
// write - Master Transmitter Mode
void lock()
{
}
void unlock()
{
}
int I2C_write(int address, const char* data, int length, uint8_t repeated)
{
lock();
// aquire();
int stop = (repeated) ? 0 : 1;
int written = i2c_write(MXC_I2CM1, address, data, length, stop);
unlock();
return length != written;
}
// read - Master Reciever Mode
int I2C_read(int address, char* data, int length, uint8_t repeated) {
lock();
// aquire();
int stop = (repeated) ? 0 : 1;
int read = i2c_read(MXC_I2CM1, address, data, length, stop);
unlock();
return length != read;
}
//******************************************************************************
int i2c_read(mxc_i2cm_regs_t *i2cm, int address, char *data, int length, int stop)
{
MBED_ASSERT(stop != 0);
return I2CM_Read(i2cm, address >> 1, NULL, 0, (uint8_t *)data, length);
}
//******************************************************************************
int i2c_write(mxc_i2cm_regs_t *i2cm, int address, const char *data, int length, int stop)
{
mxc_i2cm_fifo_regs_t *fifo = MXC_I2CM1_FIFO;
if (stop) {
return I2CM_Write(i2cm, address >> 1, NULL, 0, (uint8_t *)data, length);
}
i2cm->inten = 0;
i2cm->intfl = i2cm->intfl;
if (I2CM_Tx(i2cm, fifo, address >> 1, (uint8_t *)data, length, 0) == E_NO_ERROR) {
return length;
} else {
return -1;
}
}
//I2C i2c(I2C_SDA, I2C_SCL);//SDA-PB9,SCL-PB8
uint8_t maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)
/**
* \brief Write a value to a MAX30102 register
* \par Details
* This function writes a value to a MAX30102 register
*
* \param[in] uch_addr - register address
* \param[in] uch_data - register data
*
* \retval true on success
*/
{
char ach_i2c_data[2];
ach_i2c_data[0]=uch_addr;
ach_i2c_data[1]=uch_data;
if(I2C_write(I2C_WRITE_ADDR, ach_i2c_data, 2, 0)==0)
return 1;
else
return 0;
}
uint8_t maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *puch_data)
/**
* \brief Read a MAX30102 register
* \par Details
* This function reads a MAX30102 register
*
* \param[in] uch_addr - register address
* \param[out] puch_data - pointer that stores the register data
*
* \retval true on success
*/
{
char ch_i2c_data;
ch_i2c_data=uch_addr;
if(I2C_write(I2C_WRITE_ADDR, &ch_i2c_data, 1, 1)!=0)
return 0;
if(I2C_read(I2C_READ_ADDR, &ch_i2c_data, 1, 0)==0)
{
*puch_data=(uint8_t) ch_i2c_data;
return 1;
}
else
return 0;
}
uint8_t maxim_max30102_init()
/**
* \brief Initialize the MAX30102
* \par Details
* This function initializes the MAX30102
*
* \param None
*
* \retval true on success
*/
{
if(!maxim_max30102_write_reg(REG_INTR_ENABLE_1,0xc0)) // INTR setting
return 0;
if(!maxim_max30102_write_reg(REG_INTR_ENABLE_2,0x00))
return 0;
if(!maxim_max30102_write_reg(REG_FIFO_WR_PTR,0x00)) //FIFO_WR_PTR[4:0]
return 0;
if(!maxim_max30102_write_reg(REG_OVF_COUNTER,0x00)) //OVF_COUNTER[4:0]
return 0;
if(!maxim_max30102_write_reg(REG_FIFO_RD_PTR,0x00)) //FIFO_RD_PTR[4:0]
return 0;
if(!maxim_max30102_write_reg(REG_FIFO_CONFIG,0x0f)) //sample avg = 1, fifo rollover=false, fifo almost full = 17
return 0;
if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x03)) //0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED
return 0;
if(!maxim_max30102_write_reg(REG_SPO2_CONFIG,0x27)) // SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS)
return 0;
if(!maxim_max30102_write_reg(REG_LED1_PA,0x24)) //Choose value for ~ 7mA for LED1
return 0;
if(!maxim_max30102_write_reg(REG_LED2_PA,0x24)) // Choose value for ~ 7mA for LED2
return 0;
if(!maxim_max30102_write_reg(REG_PILOT_PA,0x7f)) // Choose value for ~ 25mA for Pilot LED
return 0;
return 1;
}
uint8_t maxim_max30102_read_fifo(uint32_t *pun_red_led, uint32_t *pun_ir_led)
/**
* \brief Read a set of samples from the MAX30102 FIFO register
* \par Details
* This function reads a set of samples from the MAX30102 FIFO register
*
* \param[out] *pun_red_led - pointer that stores the red LED reading data
* \param[out] *pun_ir_led - pointer that stores the IR LED reading data
*
* \retval true on success
*/
{
uint32_t un_temp;
unsigned char uch_temp;
*pun_red_led=0;
*pun_ir_led=0;
char ach_i2c_data[6];
//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);
ach_i2c_data[0]=REG_FIFO_DATA;
if(I2C_write(I2C_WRITE_ADDR, ach_i2c_data, 1, 1)!=0)
return 0;
if(I2C_read(I2C_READ_ADDR, ach_i2c_data, 6, 0)!=0)
{
return 0;
}
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]
return 1;
}
uint8_t maxim_max30102_reset()
/**
* \brief Reset the MAX30102
* \par Details
* This function resets the MAX30102
*
* \param None
*
* \retval true on success
*/
{
if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x40))
return 0;
else
return 1;
}

移植过程中，其实难点在于将i2c.write函数和i2c.read函数转换为代码中的I2C_write(int address, const char* data, int length, uint8_t repeated) 和I2C_read(int address, char* data, int length, uint8_t repeated)，因为被移植的代码中的读写函数是调用mbed平台的API，凭借我的聪明才智，我改写处出lock()，unlock()，I2C_write，I2C_read，i2c_read，i2c_write等关键函数，解决了这几个函数，程序就可以运行了第4个文件是max14690的驱动文件，可以借鉴我的另外一篇帖子MAX32630FTHR设计笔记（1）：流水灯（GPIO输出配置）及I2C驱动MAX14690，也是基于C语言编写的，需要注意的是，我分享的所有帖子都是用KEIL C语言编写的最后给出测试图片吧，视频就不拍了

第一图为max30102模块测到的心率为64，血氧浓度为96，第二图为专业标准设备测得的心率为64，血氧浓度为97，可以说非常准确。 本帖最后由 Justice_Gao 于 2017-9-21 21:55 编辑

回复评论（33）

沙发早起的

楼主，能发一份工程吗，邮箱:3139927868@qq.com,万分感谢

点赞 2017-9-23 18:01

板凳 Justice_Gao

引用: 早起的发表于 2017-9-23 18:01
楼主，能发一份工程吗，邮箱:3139927868@qq.com,万分感谢

发你，这可是呕心沥血的作品，你先发给ipad过来吧哈哈

点赞 2017-9-23 18:46

4楼早起的

楼主帮忙看看输出不是很稳定，是啥原因，谢谢了 Ipad已备好哈

stm32 max30102心率传感器.rar (2017-9-23 23:06 上传)

2.51 MB, 下载次数: 523

点赞 2017-9-23 23:07

5楼 Justice_Gao

引用: 早起的发表于 2017-9-23 23:07
楼主帮忙看看输出不是很稳定，是啥原因，谢谢了 Ipad已备好哈

先寄过来哈哈

点赞 2017-9-23 23:23

6楼 chenweigang

引用: Justice_Gao 发表于 2017-9-23 23:23
先寄过来哈哈

楼主的ipad拿到了吗，程序可以开源了

点赞 2018-3-9 15:39

7楼一株草

路过看看

充放电数显全套方案，双口快充慢充检测电流电压，两线三线直流电压表，配套三个8尺寸15*8MM带AV电流电压单位专利数码屏，资料QQ2981074992 邮箱同上

点赞 2018-3-13 14:35

8楼懂你的人

楼主能麻烦发一份心率和血氧计算算法吗不知道我现在手里的算法对不对谢谢楼主了

补充内容 (2018-4-2 12:35):
楼主我用的是和你一样的测量算法，现在测量结果出来饱和度是正确的，但是心率结果一会维持一个数值，过一会又发生变化，请问你的也是这种情况吗？还是一直稳定在一个数值？

补充内容 (2018-4-2 12:35):
楼主我用的是和你一样的测量算法，现在测量结果出来饱和度是正确的，但是心率结果一会维持一个数值，过一会又发生变化，请问你的也是这种情况吗？还是一直稳定在一个数值？

点赞 2018-3-19 19:41