STM32F103ZET6驱动心电传感器

这个项目是正点原子精英版驱动max30102传感器，画出心电图。

使用i2c驱动

引脚接线：

PA5--->INT

PB6--->SDA

PB7--->CLS

VIN---->3.3V

GND--->GND

#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "usart.h"
#include "myiic.h"
#include "max30102.h"
#include "algorithm.h"

/************************************************
 ALIENTEK精英STM32开发板实验22
 IIC 实验 
 技术支持：www.openedv.com
 淘宝店铺：http://eboard.taobao.com 
 关注微信公众平台微信号："正点原子"，免费获取STM32资料。
 广州市星翼电子科技有限公司  
 作者：正点原子 @ALIENTEK
************************************************/

#define MAX_BRIGHTNESS 255
#define START 100
#define DATA_LENGTH 500


uint32_t aun_ir_buffer[DATA_LENGTH]; //IR LED sensor data
int32_t n_ir_buffer_length;    //data length
uint32_t aun_red_buffer[DATA_LENGTH];    //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;

	

	
 int main(void)
 {	
	
	 uint32_t un_min, un_max, un_prev_data;  //变量来计算反映心跳的板载LED亮度 variables to calculate the on-board LED brightness that reflects the heartbeats
   uint32_t x_d[2]; 
	 int out_number=0;
	 int i,x=0;
    int32_t n_brightness;
    float f_temp;
	 
	delay_init();	    	 //延时函数初始化	  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置中断优先级分组为组2：2位抢占优先级，2位响应优先级
	uart_init(115200);	 	//串口初始化为115200
	LED_Init();		  		//初始化与LED连接的硬件接口
	LCD_Init();			   	//初始化LCD 	
	IIC_Init();
	maxim_max30102_reset();
	maxim_max30102_read_reg(0,&uch_dummy);
	maxim_max30102_init(); 
	 LCD_Clear(BLACK);
	BACK_COLOR=BLACK;
	POINT_COLOR=BLUE;//设置字体为蓝色  
	 n_brightness=0;
    un_min=0x3FFFF;
    un_max=0;
	 
	 n_ir_buffer_length=DATA_LENGTH;
	 
	  //读取前500个样本，并确定信号范围 
	 for(i=0;i<n_ir_buffer_length;i++)
	 {
		 while(PAin(5)==1);
		 maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i));
		 if(un_min>aun_red_buffer[i])
					un_min=aun_red_buffer[i];    //更新最小值
			if(un_max<aun_red_buffer[i])
					un_max=aun_red_buffer[i];    //更新最大值
			printf("red=%i,", aun_red_buffer[i]);
			printf("ir=%i\r\n", aun_ir_buffer[i]);
	 }
		un_prev_data=aun_red_buffer[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); 
	while(1)
	{
		i=0;
		un_min=0x3FFFF;
		un_max=0;
		
		for(i=START;i<DATA_LENGTH;i++)
		{
				aun_red_buffer[i-START]=aun_red_buffer[i];
				aun_ir_buffer[i-START]=aun_ir_buffer[i];
				
				
				if(un_min>aun_red_buffer[i])
				un_min=aun_red_buffer[i];
				if(un_max<aun_red_buffer[i])
				un_max=aun_red_buffer[i];
		}
	
		for(i=400;i<DATA_LENGTH;i++)
		{
				un_prev_data=aun_red_buffer[i-1];
				while(PAin(5)==1);
				maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i));
		
				if(aun_red_buffer[i]>un_prev_data)
				{
						f_temp=aun_red_buffer[i]-un_prev_data;
						f_temp/=(un_max-un_min);
						f_temp*=MAX_BRIGHTNESS;
						n_brightness-=(int)f_temp;
						if(n_brightness<0)
								n_brightness=0;
				}
				else
				{
						f_temp=un_prev_data-aun_red_buffer[i];
						f_temp/=(un_max-un_min);
						f_temp*=MAX_BRIGHTNESS;
						n_brightness+=(int)f_temp;
						if(n_brightness>MAX_BRIGHTNESS)
								n_brightness=MAX_BRIGHTNESS;
				}
//				printf("red=%i,", aun_red_buffer[i]);
//				printf(" ir=%i,", aun_ir_buffer[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); 
		
		printf(" HR=%i,", n_heart_rate); 
		printf(" HRvalid=%i,", ch_hr_valid);
		printf(" SpO2=%i,", n_sp02);
		printf(" SPO2Valid=%i\r\n", ch_spo2_valid);
		
		
		if(ch_hr_valid)
		{
			x_d[0]=x_d[1];
			x_d[1]=n_heart_rate*2;
			 LCD_ShowxNum(100, 100,  n_heart_rate, 3, 16, 0);  
		}
		else
		{
			x_d[0]=x_d[1];
			x_d[1]=50;
		}
			LCD_DrawLine(x_d[0],x,x_d[1],x+3);
		x+=3;
		if(x>320)
		{LCD_Clear(BLACK);
			x=0;
			delay_ms(250);
		}
		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); 
	}
}

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链接：https://pan.baidu.com/s/1g_RXgeFwhAYrnfCex9b8ow?pwd=krvd 
提取码：krvd