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//******************************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"
#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);
void LCD12864_Init(void); //LCD12864初始化函數
void LCD12864_WriteInfomation(unsigned char ucData,bit bComOrData); //向LCD12864寫入數據，bComOrData為1時寫入的是數據，0時寫入的是命令
void LCD12864_CheckBusy(void); //忙檢測函數
void LCD12864_DisplayOneLine(unsigned char ucPos,unsigned char *ucStr); //向LCD12864寫入一行文字
void LCD12864_set_pos(unsigned char X,unsigned char Y);
void LCD_disp_list_char(unsigned char X, unsigned char Y, char *DData);
void delay(unsigned int uiCount);
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
sbit LCD12864_RS = P0^7; //RS控制引腳
sbit LCD12864_RW = P0^6; //RW控制引腳
sbit LCD12864_EN = P0^5; //EN控制引腳
sbit LCD12864_PSB = P0^4; //模式選擇引腳，ST7920控制器，1為8位并行接口，0為串行接口
#define LCDPORT P2 //數據引腳
// 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};
/******************************************************************************
函數名稱：delay
函數功能：延時函數
入口參數：uiCount-延時參數
返回值：無
備注：無
*******************************************************************************/
void delay(unsigned int n)
{
unsigned int i,j;
for(i=0;i<n;i++)
for(j=0;j<100;j++);
}
/******************************************************************************
函數名稱：LCD12864_WriteInfomation
函數功能：向LCD12864寫入命令或者數據
入口參數：ucData-要寫入液晶的數據或者命令的內容
bComOrData-命令或者數據的標志位選擇，0或者1，其中
1：寫入的是數據
0：寫入的是命令
返回值：無
備注：無
*******************************************************************************/
void LCD12864_WriteInfomation(unsigned char ucData,bit bComOrData)
{
LCD12864_CheckBusy(); //忙檢測
LCD12864_RW = 0; //拉低RW
LCD12864_RS = bComOrData; //根據標志位判斷寫入的是命令還是數據
delay(15); //延時，等待操作
LCDPORT = ucData; //將數據送至數據端口
LCD12864_EN = 1; //使能信號
delay(15); //延時
LCD12864_EN = 0; //按照時序來操作
delay(15);
}
/******************************************************************************
函數名稱：LCD12864_Init
函數功能：LCD12864液晶初始化
入口參數：無
返回值：無
備注：無
*******************************************************************************/
void LCD12864_Init(void)
{
delay(40);//延時
LCD12864_PSB = 1; //8位并口工作模式
delay(15);//延時
LCD12864_WriteInfomation(0x30,0); //基本指令集
delay(15);
LCD12864_WriteInfomation(0x08,0); //顯示設置
delay(15);
LCD12864_WriteInfomation(0x10,0); //光標設置
delay(15);
LCD12864_WriteInfomation(0x0c,0); //游標設置
delay(15);
LCD12864_WriteInfomation(0x01,0); //清屏
delay(15);
LCD12864_WriteInfomation(0x06,0); //進入點設定
delay(15);
}
/******************************************************************************
函數名稱：LCD12864_CheckBusy
函數功能：忙檢測
入口參數：無
返回值：無
備注：使用變量i做計時，避免液晶在死循環處停滯。
*******************************************************************************/
void LCD12864_CheckBusy(void)
{
unsigned char i = 250; //局部變量
LCD12864_RS = 0; //拉低
LCD12864_RW = 1; //拉高
LCD12864_EN = 1; //使能
while((i > 0) && (P0 & 0x80))i--; //判斷忙標志位
LCD12864_EN = 0; //釋放
}
/******************************************************************************
函數名稱：LCD12864_DisplayOneLine
函數功能：顯示一行漢字（8個漢字或者16個英文字符）
入口參數：position-要顯示的行的首地址，可選值0x80,0x88,0x90,0x98,其中：
0x80:液晶的第一行；
0x88:液晶的第三行；
0x90:液晶的第二行；
0x98:液晶的第四行。
p-要顯示的內容的首地址。
返回值：無
備注：無
*******************************************************************************/
void LCD12864_DisplayOneLine(unsigned char position,unsigned char *p)
{
unsigned char i;
LCD12864_WriteInfomation(position,0);//寫入要顯示文字的行的首地址
delay(15);
for(i = 0;i<16;i++) //依次執行寫入操作
{
LCD12864_WriteInfomation(*p,1);
p++;
}
}
/******************************************************************************
函數名稱：LCD12864_set_pos
函數功能：設定顯示位置
入口參數：X-行數，Y-列數
返回值：無
備注：無
*******************************************************************************/
void LCD12864_set_pos(unsigned char X,unsigned char Y)
{
unsigned char pos;
if(X==1)
X=0x80;
else if(X==2)
X=0x90;
else if(X==3)
X=0x88;
else if(X==4)
X=0x98;
pos=X+Y;
LCD12864_WriteInfomation(pos,0);
}
/*****************************************
函數名稱：LCD_disp_list_char
函數功能：在指定位置顯示內容
入口參數：X-行數，Y-列數，DData-顯示緩沖地址
返回值：無
備注：無
*****************************************/
void LCD_disp_list_char(unsigned char X, unsigned char Y, char *DData)
{
unsigned char ListLength;
ListLength = 0;
LCD12864_set_pos(X,Y);
delay(15);
while(DData[ListLength]!=0)
{
LCD12864_WriteInfomation(DData[ListLength],1);
ListLength++;
Y++;
if(Y==16){
Y = 0;
X++;
LCD12864_set_pos(X,Y);
}
}
//輸出一行后發現結尾字符為英文字母，補一個空格
if(ListLength%2){
LCD12864_WriteInfomation(0,1);
}
return;
}
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
DisBuff[1] = BPM%100/10+48; //取十位數
DisBuff[0] = BPM/100+48; //百位數
if(DisBuff[0]==48)
DisBuff[0]=32;
QS = true; // set Quantified Self flag
// QS FLAG IS NOT CLEARED INSIDE THIS ISR
}
}
if (Signal < thresh && Pulse == true){ // when the values are going down, the beat is over
// blinkPin=1; // turn off pin 13 LED
Pulse = false; // reset the Pulse flag so we can do it again
amp = Peak - Trough; // get amplitude of the pulse wave
thresh = amp/2 + Trough; // set thresh at 50% of the amplitude
Peak = thresh; // reset these for next time
Trough = thresh;
}
if (N > 2500){ // if 2.5 seconds go by without a beat
thresh = 512; // set thresh default
Peak = 512; // set P default
Trough = 512; // set T default
lastBeatTime = sampleCounter; // bring the lastBeatTime up to date
firstBeat = true; // set these to avoid noise
secondBeat = false; // when we get the heartbeat back
}
EA=1; // enable interrupts when youre done!
}// end isr

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