Revision 2:e660e68a91fa, committed 2011-01-04

Comitter:

jrsikken

Date:

Tue Jan 04 21:33:59 2011 +0000

Parent:

1:8b001f936bb0

Commit message:

Now the heart rate is also send over a serial port to a bluetooth device.

Changed in this revision

--- a/main.cpp	Sat Nov 27 11:13:20 2010 +0000
+++ b/main.cpp	Tue Jan 04 21:33:59 2011 +0000
@@ -1,8 +1,14 @@
-//This program displays heart rate and time between heart beats on LCD, serial port and on a USB mass storage device.
-//The program has two interrupt routines: 1.Every 1ms a counter is increased with one, 2. On every heart beat the counter is value copied.
-//In the main loop the beats per minute are calculated.
-//Ext.Modules: -Polar RMCM-01 heart rate module connected to pin8.
-//             -2x16 LCD
+// This program displays heart rate and time between heart beats on LCD, prints it to a USB serial port,
+// print it to a bluetooth serial port and store it on a USB mass storage device.
+// The program has two interrupt routines:
+// 1.Every 1ms a counter is increased with one,
+// 2. On every heart beat the counter is value copied.
+// In the main loop the beats per minute are calculated.
+
+// Ext.Modules:- Polar RMCM-01 heart rate module connected to pin8.
+//             - 2x16 LCD
+//             - a RF-BT0417CB bluetooth serial device connected to p27 and p28
+//             - an USB mass storage device
 
 #include "mbed.h"
 #include "TextLCD.h"
@@ -11,17 +17,16 @@
 MSCFileSystem msc(FSNAME);
 
 Timer t;                // counts the time from beginning of main loop
+InterruptIn beat(p8);   // beat is the name for a interrupt on pin 8
 TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d0-d3
-InterruptIn beat(p8);   // beat is the name for a inteerupt on pin 8 
-DigitalOut led(LED1);   // this led is toggled on every heart beat
 Ticker mscnt;           // this is used to create a ms counter
+Serial bt(p28, p27);    // tx, rx of the bluetooth serial COM port
 
-//initialize
-int count, CNT,displayBPMFlag ;
+int count,CNT,displayBPMFlag;//initialize global variables
 
-void ms_counter() {         //this interrupt routine starts every ms
+void ms_counter() {         //this interrupt routine starts every 1ms
     count++;                //the counter is increased with 1
-    if (count>1999) {       //when no heart beat is detected for >2ms, then display "-" in the main loop
+    if (count>1999) {       //when no heart beat is detected for >2sec, then display "-" in the main loop
         CNT=count;          // copy counter value to CNT
         displayBPMFlag = 1; // set flag that the BPM can be put to LCD in the main loop
         count=0;            // reset counter value
@@ -32,41 +37,57 @@
     CNT = count;        // copy counter value to CNT
     count = 0 ;         // reset counter value
     displayBPMFlag = 1; // set flag that the BPM can be put to LCD in the main loop
-    led = !led;         // toggle the led on/off
 }
 
 int main() {
-    t.start();                          // The ti
-    int BPM;                            //initialize BPM
-    lcd.cls();                          //clear the lcd display
-    mscnt.attach_us(&ms_counter, 1000); // the address of the function to be attached (ms_counter) and the interval (1ms)
-    beat.rise(&flip);                   // attach the address of the flip function to the rising edge
-    while (1) {
-        if (displayBPMFlag == 1) {  // program loops around in here
-            displayBPMFlag = 0;     // clear displayBPMflag
-            if (CNT>250&CNT<2000) { //when heart rate is within 30-240BPM
+    int BPM;                           //initialize BPM locally
+    lcd.cls();                         //clear the lcd display
+    lcd.locate(0,0);            //set cursor to first character and first line
+    lcd.printf("Heart Rate");  //display the time in ms on the lcd
+    lcd.locate(0,1);            //set cursor to first character and second line
+    lcd.printf("Jasper Sikken");  //display the beats per minute on the lcd
+    wait_ms(2000);
+    mscnt.attach_us(&ms_counter,1000); //the address of the function to be attached (ms_counter) and the interval (1ms)
+    printf("0 \r\n");                  //print 0 ms to the serial port
+    bt.printf("0 \r\n");               //print 0 ms to the bluetooth serial port
+    FILE *fp=fopen("/msc/HR.txt","a+");//Open file on USB Mass Storage device, 8.3 filesystem, open for write and append
+    if (fp==NULL)error("Could not open file for write\n");// error code
+    fprintf(fp,"0,0 \r\n");            //write "0,0" to file to indicate beginning of a measurement
+    fclose(fp);                        //close file
+    lcd.cls();                         //clear the lcd display
+    t.start();                         //the time since the beginning of the main loop
+    beat.rise(&flip);                  //the interrupt flip is started to the rising edge
+    while (1) {                        //program loops around in here
+        if (displayBPMFlag == 1) {     //if the flag is set that the BPM can be used in the main loop
+            displayBPMFlag = 0;        //clear displayBPMflag
+            if (CNT>250&CNT<2000) {    //when heart rate is within 30-240BPM
                 BPM = 60000/CNT;            //calculate BPM
-                lcd.cls();                  //clear the lcd display
                 lcd.locate(0,0);            //set cursor to first character and first line
-                lcd.printf("%i ms", CNT);   //display the time in ms on the lcd
+                lcd.printf("%i ms ",CNT);  //display the time in ms on the lcd
                 lcd.locate(0,1);            //set cursor to first character and second line
-                lcd.printf("%i BPM",BPM);   //display the beats per minute on the lcd
+                lcd.printf("%i BPM ",BPM);  //display the beats per minute on the lcd
                 printf("%i\r\n",CNT);       //print time between heart beats to the serial port
-                FILE *fp = fopen( "/msc/HR.txt", "a+");//Open file on USB Mass Storage device, 8.3 filesystem, open for write and append 
-                if ( fp == NULL )error("Could not open file for write\n"); // error code
-                fprintf(fp, "%f %i\r\n",t.read(),BPM);//write time-since-start-main-loop and BPM to file
-                fclose(fp);     // close file
-            } else {//when heart rate is NOT within 30-240BPM
+                bt.printf("%i\r\n",CNT);    //print time between heart beats to the bluetooth serial port
+                FILE *fp=fopen("/msc/HR.txt","a+");//Open file on USB Mass Storage device, 8.3 filesystem, open for write and append
+                if ( fp == NULL )error("Could not open file for write\n");//error code
+                fprintf(fp, "%f,%i\r\n",t.read(),BPM);//write time-since-start-main-loop and BPM to file
+                fclose(fp);                 //close file
+            } else {                //when heart rate is NOT within 30-240BPM
                 lcd.cls();                  //clear the lcd display
                 lcd.locate(0,0);            //set cursor to first character and first line
                 lcd.printf("- ms");         //display empty time in ms on the lcd
                 lcd.locate(0,1);            //set cursor to first character and second line
                 lcd.printf("- BPM");        //display empty beats per minute on the lcd
-                printf("- \r\n", CNT);      //print the time in ms to the serial port
+                printf("0 \r\n");       //print no time in ms to the serial port
+                bt.printf("0 \r\n");    //print no between heart beats to the bluetooth serial port
+                FILE *fp = fopen( "/msc/HR.txt", "a+");//Open file on USB Mass Storage device, 8.3 filesystem, open for write and append
+                if ( fp == NULL )error("Could not open file for write\n"); // error code
+                fprintf(fp, "0,0 \r\n");   //write "0,0" to file
+                fclose(fp);             //close file
             }
 
         }
 
     }
-    
+
 }
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