芯片stc12c5a
采用清翔電子出品的QX-mini51開發板來配合pulsesensor心率傳感器完成脈搏采集和心率計算。
文件中一共有三個程序，分別為：
1.pulsesensor_STC12C5A：僅使用電腦顯示心率值
2.pulsesensor_STC12C5A_LCD1602：使用LCD1602和電腦顯示心率值
3.pulsesensor_STC12C5A _LCD12864：使用LCD12864和電腦顯示心率值
注意：使用前務必將短路塊J1，J5，J6拿掉，不然會嚴重影響信號從而導致心率值不準！
可以保留短路塊J2，此時LED1會跟隨心跳閃爍。
單片機源程序如下:
- //******************************參數說明*********************************//
- //MCU:STC12C5A60S2
- //ADC PIN:P1.0
- //SYSTEM CLOCK:11.0592MHz
- //Baudrate:115200
- //UART:P3.0 P3.1
- //**********************************************************************//
- //******************************使用說明*********************************//
- //注意：使用前務必將短路塊J1，J5，J6拿掉，不然會嚴重影響信號！
- //可以保留短路塊J2，此時LED1會跟隨心跳閃爍
- //**********************************************************************//
- #include <STC12C5A60S2.h>
- #include "stdio.h"
- #include <LCD12864.h>
- #define false 0
- #define true 1
- #define FOSC 11059200L //系統時鐘
- #define BAUD 115200 //波特率
- #define T0MS (65536-FOSC/12/500) //500HZ in 12T MODE
- #define ADC_POWER 0x80 //ADC POWER CONTROL BIT
- #define ADC_FLAG 0x10 //ADC COMPLETE FLAG
- #define ADC_START 0x08; //ADC START CONTROL BIT
- #define ADC_SPEEDLL 0x00 //540 CLOCKS
- #define ADC_SPEEDL 0x20 //360 CLOCKS
- #define ADC_SPEEDH 0x40 //180 CLOCKS
- #define ADC_SPEEDHH 0x60 //90 CLOCKS
- #define ADC_MASK 0x01
- void UART_init(void);
- void ADC_init(unsigned char channel);
- void T0_init(void);
- void sendDataToProcessing(char symbol, int dat);
- void UART_send(char dat);
- unsigned char PulsePin = 0; // Pulse Sensor purple wire connected to analog pin 0(P1.0為AD口)
- //sbit blinkPin = P2^0; // pin to blink led at each beat
- //sbit fadePin = P2^3; // pin to do fancy classy fading blink at each beat
- //sbit led1 = P2^1;
- //sbit led2 = P2^2;
- int fadeRate = 0; // used to fade LED on with PWM on fadePin
- // these variables are volatile because they are used during the interrupt service routine!
- volatile unsigned int BPM; // used to hold the pulse rate
- volatile unsigned int Signal; // holds the incoming raw data
- volatile unsigned int IBI = 600; // holds the time between beats, must be seeded!
- volatile bit Pulse = false; // true when pulse wave is high, false when it's low
- volatile bit QS = false; // becomes true when Arduoino finds a beat.
- volatile int rate[10]; // array to hold last ten IBI values
- volatile unsigned long sampleCounter = 0; // used to determine pulse timing
- volatile unsigned long lastBeatTime = 0; // used to find IBI
- volatile int Peak =512; // used to find peak in pulse wave, seeded
- volatile int Trough = 512; // used to find trough in pulse wave, seeded
- volatile int thresh = 512; // used to find instant moment of heart beat, seeded
- volatile int amp = 100; // used to hold amplitude of pulse waveform, seeded
- volatile bit firstBeat = true; // used to seed rate array so we startup with reasonable BPM
- volatile bit secondBeat = false; // used to seed rate array so we startup with reasonable BPM
- static unsigned char order=0;
- unsigned char code ucStr1[] = "Pulsesensor test"; //顯示信息1
- unsigned char code ucStr2[] = " "; //顯示信息2
- unsigned char code ucStr3[] = " BPM: "; //顯示信息3
- unsigned char code ucStr4[] = "作者:anning86525"; //顯示信息4
- unsigned char DisBuff[4]={0};
- void sys_init()
- {
- LCD12864_Init(); //初始化液晶
- UART_init(); // we agree to talk fast!
- ADC_init(PulsePin);
- T0_init(); // sets up to read Pulse Sensor signal every 2mS
- }
- void main(void)
- {
- sys_init();
- LCD12864_DisplayOneLine(0x80,ucStr1); //顯示信息1
- LCD12864_DisplayOneLine(0x90,ucStr2); //顯示信息2
- LCD12864_DisplayOneLine(0x88,ucStr3); //顯示信息3
- LCD12864_DisplayOneLine(0x98,ucStr4); //顯示信息4
- while(1)
- {
- sendDataToProcessing('S', Signal); // send Processing the raw Pulse Sensor data
- if (QS == true){ // Quantified Self flag is true when arduino finds a heartbeat
- fadeRate = 255; // Set 'fadeRate' Variable to 255 to fade LED with pulse
- sendDataToProcessing('B',BPM); // send heart rate with a 'B' prefix
- sendDataToProcessing('Q',IBI); // send time between beats with a 'Q' prefix
- QS = false; // reset the Quantified Self flag for next time
- LCD_disp_list_char(3,4,DisBuff);//在LCD12864上顯示BPM
- }
-
- //ledFadeToBeat();
- delay(138); // take a break 19.6ms
- }
- }
- //void ledFadeToBeat(){
- // fadeRate -= 15; // set LED fade value
- // fadeRate = constrain(fadeRate,0,255); // keep LED fade value from going into negative numbers!
- // analogWrite(fadePin,fadeRate); // fade LED
- // }
- void sendDataToProcessing(char symbol, int dat ){
- putchar(symbol); // symbol prefix tells Processing what type of data is coming
- printf("%d\r\n",dat); // the data to send culminating in a carriage return
- }
- void UART_init(void)
- {
- PCON &= 0x7f; //波特率不倍速
- SCON = 0x50; //8位數據，可變波特率
- BRT = 0xFD; //獨立波特率產生器初值
- AUXR |= 0x04; //時鐘設置為1T模式
- AUXR |= 0x01; //選擇獨立波特率產生器
- AUXR |= 0x10; //啟動波特率產生
- }
- char putchar(unsigned char dat)
- {
- TI=0;
- SBUF=dat;
- while(!TI);
- TI=0;
-
- return SBUF;
- }
- void T0_init(void){
- // Initializes Timer0 to throw an interrupt every 2mS.
- TMOD |= 0x01; //16bit TIMER
- TL0=T0MS;
- TH0=T0MS>>8;
- TR0=1; //start Timer 0
- ET0=1; //enable Timer Interrupt
- EA=1; // MAKE SURE GLOBAL INTERRUPTS ARE ENABLED
- }
- void ADC_init(unsigned char channel)
- {
- P1ASF=ADC_MASK<<channel; //enable PlusePin as ADC INPUT
- ADC_RES=0; //clear former ADC result
- ADC_RESL=0; //clear former ADC result
- AUXR1 |= 0x04; //adjust the format of ADC result
- ADC_CONTR=channel|ADC_POWER|ADC_SPEEDLL|ADC_START; //power on ADC and start conversion
- }
- unsigned int analogRead(unsigned char channel)
- {
- unsigned int result;
- ADC_CONTR &=!ADC_FLAG; //clear ADC FLAG
- result=ADC_RES;
- result=result<<8;
- result+=ADC_RESL;
- ADC_CONTR|=channel|ADC_POWER|ADC_SPEEDLL|ADC_START;
- return result;
- }
- // Timer 0中斷子程序，每2MS中斷一次，讀取AD值，計算心率值
- void Timer0_rountine(void) interrupt 1
- {
- int N;
- unsigned char i;
- // keep a running total of the last 10 IBI values
- unsigned int runningTotal = 0; // clear the runningTotal variable
- EA=0; // disable interrupts while we do this
- TL0=T0MS;
- TH0=T0MS>>8; //reload 16 bit TIMER0
- Signal = analogRead(PulsePin); // read the Pulse Sensor
- sampleCounter += 2; // keep track of the time in mS with this variable
- N = sampleCounter - lastBeatTime; // monitor the time since the last beat to avoid noise
- // find the peak and trough of the pulse wave
- if(Signal < thresh && N > (IBI/5)*3){ // avoid dichrotic noise by waiting 3/5 of last IBI
- if (Signal < Trough){ // T is the trough
- Trough = Signal; // keep track of lowest point in pulse wave
- }
- }
- if(Signal > thresh && Signal > Peak){ // thresh condition helps avoid noise
- Peak = Signal; // P is the peak
- } // keep track of highest point in pulse wave
- // NOW IT'S TIME TO LOOK FOR THE HEART BEAT
- // signal surges up in value every time there is a pulse
- if (N > 250){ // avoid high frequency noise
- if ( (Signal > thresh) && (Pulse == false) && (N > (IBI/5)*3) ){
- Pulse = true; // set the Pulse flag when we think there is a pulse
- // blinkPin=0; // turn on pin 13 LED
- IBI = sampleCounter - lastBeatTime; // measure time between beats in mS
- lastBeatTime = sampleCounter; // keep track of time for next pulse
- if(secondBeat){ // if this is the second beat, if secondBeat == TRUE
- secondBeat = false; // clear secondBeat flag
- for(i=0; i<=9; i++){ // seed the running total to get a realisitic BPM at startup
- rate[i] = IBI;
- }
- }
- if(firstBeat){ // if it's the first time we found a beat, if firstBeat == TRUE
- firstBeat = false; // clear firstBeat flag
- secondBeat = true; // set the second beat flag
- EA=1; // enable interrupts again
- return; // IBI value is unreliable so discard it
- }
- for(i=0; i<=8; i++){ // shift data in the rate array
- rate[i] = rate[i+1]; // and drop the oldest IBI value
- runningTotal += rate[i]; // add up the 9 oldest IBI values
- }
- rate[9] = IBI; // add the latest IBI to the rate array
- runningTotal += rate[9]; // add the latest IBI to runningTotal
- runningTotal /= 10; // average the last 10 IBI values
- BPM = 60000/runningTotal; // how many beats can fit into a minute? that's BPM!
- if(BPM>200)BPM=200; //限制BPM最高顯示值
- if(BPM<30)BPM=30; //限制BPM最低顯示值
- DisBuff[2] = BPM%10+48;//取個位數
- ……………………
- …………限于本文篇幅 余下代碼請從51黑下載附件…………
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pulsesensor_STC12C5A.rar
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2018-12-26 23:25 上傳
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