main(){
DDRD = 0x3E; // set keypad I/O data direction register
NewKey = 0; // reset key variables
LastKey = 0xFF;
// Initialize the LCD
LCD_Command(0x3C); // initialize command
LCD_Command(0x0C); // display on, cursor off
LCD_Command(0x06);
LCD_Command(0x01);
// Display Header Information on LCD
LCD_Command(LINE_1); // goto lcd line 1
LCDprint("Keypad Test");
LCD_Command(LINE_2); // goto lcd line 2
LCDprint("Press Keys");
LCD_Command(LINE_3); // goto lcd line 3
// main loop .. endless
for( ; ;){
if(kbhit()){ // if new key pressed
cprint(NewKey); // display it
}
}
}
void showCredits(void){
clearLCD();
// go to position 1, 1
// print 'Credits:'
goToLine(1);
LCDprint("Credits: ");
goToLine(2);
LCDprint("-Francis Papienau");
goToLine(3);
LCDprint("-Thai Nguyen");
}
void initMenusThroughMenus(void){
clearLCD();
goToLine(1);
// install the menus in memory
LCDprint("Menus init(); OK");
delay(100);
}
void attachInterrupts(void){
// ----- ISR #1 STARTUP PROCEDURES ------
// Installing Power Supply ISR
// NEEDED TO DETERMINE IF A POWER
// FAILURE HAS OCCURED
#ifdef PWRFailDetect
// Interrupt triggered by falling voltage on power supply input
LCDprintln(" * Attaching powerfail ISR ");
attachInterrupt(0, powerFail, FALLING);
LCDprintln(" [OK] ");
#endif
// ----- ISR #2 STARTUP PROCEDURES ------
// Installing Loggin On/Off ISR
// NEEDED TO START OR STOP THE LOGGING
// ON THE VDIP.
#ifdef EnableLogging
LCDprintln(" * Attaching logging ISR ");
// Interrupt triggered by pressing "log on/off" button
attachInterrupt(2, LoggingChange, FALLING);
LCDprint(" [OK] ");
#endif
LCDprintln("Start. Complete!");
}
static void drawRxChannel(uint8_t channelIndex, uint8_t width)
{
LCDprint(rcChannelLetters[channelIndex]);
const uint32_t percentage = (constrain(rcData[channelIndex], PWM_RANGE_MIN, PWM_RANGE_MAX) - PWM_RANGE_MIN) * 100 / (PWM_RANGE_MAX - PWM_RANGE_MIN);
drawHorizonalPercentageBar(width - 1, percentage);
}
void openNewFiles(void){
// open new files to store values in. Using the EEPROM
// to print the titles of the files, and the folders
// make dir;
// ‘MKD’<sp><name><cr>
HOSTUSB.print("MKD ");
HOSTUSB.print(SessionFolder);
HOSTUSB.print(SessionID);
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("CD ");
HOSTUSB.print(SessionFolder);
HOSTUSB.print(SessionID);
HOSTUSB.print(13, BYTE);
delay(100);
// command for USB FTDI: OTW<sp>NAME<cr>
// Creating files
HOSTUSB.print("OPW TempData");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("OPW Vitals");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("OPW Others");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("OPW System");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("OPW Acknowledge");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
// sending through USB the new File System
goToLine(1);
LCDprint("New files opened");
delay(1000);
}
// LCDbar(n,v) : draw a bar graph - n number of chars for width, v value in % to display
void drawHorizonalPercentageBar(uint8_t width,uint8_t percent) {
uint8_t i, j;
if (percent > 100)
percent = 100;
j = (width * percent) / 100;
for (i = 0; i < j; i++)
LCDprint(159); // full
if (j < width)
LCDprint(154 + (percent * width * 5 / 100 - 5 * j)); // partial fill
for (i = j + 1; i < width; i++)
LCDprint(154); // empty
}
int askforUSB(void){
int continueFlag = 0, choice = 0;
clearLCD();
// print the prompt
goToLine(1);
LCDprint("***************");
goToLine(2);
LCDprint("Record?");
goToLine(3);
LCDprint("-> YES [Left]");
goToLine(4);
LCDprint("-> NO [Right]");
goToLine(5);
LCDprint("***************");
//resetting the buttons to up position
reset_buttons();
do{
// if left is pushed
if(LEFT_BUTTON_PRESSED){
// Yes record
choice = 1;
continueFlag = 1;
// if the right is pushed
}else if(RIGHT_BUTTON_PRESSED){
// no do not record
choice = 0;
continueFlag = 1;
// if the middle is pushed
}
//do while an input is noticed
}while(continueFlag == 0);
// reset the buttons again
reset_buttons();
// return the choice
return choice;
}
void main (void)
{
float period;
PCA0MD &= ~0x40; // WDTE = 0 (clear watchdog timer enable)
PORT_Init(); // Initialize Port I/O
SYSCLK_Init (); // Initialize Oscillator
UART0_Init(); // Initialize UART0
TIMER0_Init();
printf("\x1b[2J"); // Clear screen using ANSI escape sequence.
printf ("Period measurement at pin P0.1 using Timer 0.\n"
"File: %s\n"
"Compiled: %s, %s\n\n",
__FILE__, __DATE__, __TIME__);
while (1)
{
// Reset the counter
TL0=0;
TH0=0;
TF0=0;
overflow_count=0;
while(P0_1!=0); // Wait for the signal to be zero
while(P0_1!=1); // Wait for the signal to be one
TR0=1; // Start the timer
while(P0_1!=0) // Wait for the signal to be zero
{
if(TF0==1) // Did the 16-bit timer overflow?
{
TF0=0;
overflow_count++;
}
}
while(P0_1!=1) // Wait for the signal to be one
{
if(TF0==1) // Did the 16-bit timer overflow?
{
TF0=0;
overflow_count++;
}
}
TR0=0; // Stop timer 0, the 24-bit number [overflow_count-TH0-TL0] has the period!
period=(overflow_count*65536.0+TH0*256.0+TL0)*(12.0/SYSCLK);
// Send the period to the serial port
printf( "\rf=%fs" , period);
heart_rate = 1.0/(period/60.0);
bpm = (int) heart_rate;
LCDprint(bpm, 1, 5); //print heart rate bpm to LCD display
}
}
void processTerminalCommands(void){
#ifdef USBConnected
#else
LCDprint("***ERROR*** (Xbee)");
#endif
}
void deleteFiles(void){
// delete the specific files written in the root directory
// command for FTDI : DLF<sp>NAME<cr>
// deleting files
HOSTUSB.print("DLF TempData");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("DLF Vitals");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("DLF Others");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("DLF System");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("DLF Acknowledge");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
// go back to root
HOSTUSB.print("CD ..");
HOSTUSB.print(13, BYTE);
delay(100);
// delete dir
HOSTUSB.print("DLD "+SessionFolder);
HOSTUSB.print(13, BYTE);
delay(100);
// sending through USB the new File System
goToLine(1);
LCDprint("Files/Dir Deleted");
delay(1000);
}
void viewBatteryLevels(void){
clearLCD();
// display only battery voltage
goToLine(2);
LCDprint("Battery Voltages:");
do{
goToLine(3);
LCDprint("- Board: " + tempBat +"V");
goToLine(4);
LCDprint("- ECG: " + tempECGBat +"V");
if(LEFT_BUTTON_PRESSED){
break;
}
#ifdef ConnectedUSB
// Echo data from the VDIP back to the host if conected to a PC
processVdipBuffer();
#endif
// test buttons
test_buttons();
sendSensorValues();
#ifdef EnableLogging
FillUSBBuffers();
if(BuffersFull == 1){
writeUSBBUffer();
}
#endif
}while(1);
}
void viewBatteryLevels(void){
char Buffer[11];
PString printable_string(Buffer, sizeof(Buffer));
clearLCD();
// display only battery voltage
goToLine(2);
LCDprint("Battery Voltages:");
do{
goToLine(3);
printable_string = "- Board: ";
printable_string += tempBat;
printable_string += "V";
LCDprintConst(printable_string);
goToLine(4);
printable_string = "- ECG: ";
printable_string += tempECGBat;
printable_string += "V";
LCDprintConst(printable_string);
if(LEFT_BUTTON_PRESSED){
break;
}
#ifdef ConnectedUSB
// Echo data from the VDIP back to the host if conected to a PC
processVdipBuffer();
#endif
// test buttons
test_buttons();
sendSensorValues();
#ifdef EnableLogging
FillUSBBuffers();
if(BuffersFull == 1){
printUSBBUffer();
}
#endif
}while(1);
}
static void showRxPage(void)
{
for (int channelIndex = 0; channelIndex < rxRuntimeConfig.channelCount && channelIndex < RX_CHANNELS_PER_PAGE_COUNT; channelIndex += 2) {
i2c_OLED_set_line(bus, (channelIndex / 2) + PAGE_TITLE_LINE_COUNT);
drawRxChannel(channelIndex, HALF_SCREEN_CHARACTER_COLUMN_COUNT);
if (channelIndex >= rxRuntimeConfig.channelCount) {
continue;
}
if (IS_SCREEN_CHARACTER_COLUMN_COUNT_ODD) {
LCDprint(' ');
}
drawRxChannel(channelIndex + PAGE_TITLE_LINE_COUNT, HALF_SCREEN_CHARACTER_COLUMN_COUNT);
}
}
void closeAllFiles(void){
// Close all files for writting
// command for USB FTDI: CLF<sp>NAME<cr>
HOSTUSB.print("CLF TempData");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("CLF Vitals");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("CLF Others");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("CLF System");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
HOSTUSB.print("CLF Acknowledge");
HOSTUSB.print(SessionID);
HOSTUSB.print(".txt");
HOSTUSB.print(13, BYTE);
delay(100);
goToLine(1);
LCDprint("Files Closed");
delay(1000);
}
void printBattLevel(void){
// go to x=123, y=1 and print the battery level sprite
goToPosition(123,1);
if((tempBat/9.0)*100.00 < 10.0){
LCDprint(Batt10);
}else if((tempBat/9.0)*100.00 >= 10.0 ||(tempBat/9.0)*100.00 <30.0){
LCDprint(Batt30);
}else if((tempBat/9.0)*100.00 >= 30.0 ||(tempBat/9.0)*100.00 <45.0){
LCDprint(Batt45);
}else if((tempBat/9.0)*100.00 >= 45.0 ||(tempBat/9.0)*100.00 <60.0){
LCDprint(Batt60);
}else if((tempBat/9.0)*100.00 >= 60.0 ||(tempBat/9.0)*100.00 <75.0){
LCDprint(Batt75);
}else if((tempBat/9.0)*100.00 >= 75.0){
LCDprint(FullBatt);
}
}
void printNUll(void){
// Print NULL
LCDprint(" ");
}
void printHeaders(void){
// print the headers for the CSV files
// 1. open the file,
// 2. send the print command
// 3. send the length
// 4. send data to be written
// 5. close the file
// ========== Temperature File =============
//1.
HOSTUSB.print("OPW TempData");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
//2.
HOSTUSB.print("WRF ");
//3.
HOSTUSB.print(TempHeader.length());
HOSTUSB.print(13, BYTE);
//4.
HOSTUSB.print(TempHeader);
HOSTUSB.print(13, BYTE);
//6.
HOSTUSB.print("CLF TempData");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
// ========== Vital Signs File =============
//1.
HOSTUSB.print("OPW Vitals");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
//2.
HOSTUSB.print("WRF ");
//3.
HOSTUSB.print(VitalsHeader.length());
HOSTUSB.print(13, BYTE);
//4.
HOSTUSB.print(VitalsHeader);
HOSTUSB.print(13, BYTE);
//5.
HOSTUSB.print("CLF Vitals");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
// ========== Other Parameters File =============
//1.
HOSTUSB.print("OPW Others");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
//2.
HOSTUSB.print("WRF ");
//3.
HOSTUSB.print(OthersHeader.length());
HOSTUSB.print(13, BYTE);
//4.
HOSTUSB.print(OthersHeader);
HOSTUSB.print(13, BYTE);
//5.
HOSTUSB.print("CLF Others");
HOSTUSB.print(SessionID);
HOSTUSB.print(".CSV");
HOSTUSB.print(13, BYTE);
delay(100);
goToLine(1);
LCDprint("Headers Printed!");
delay(1000);
}
void printXbeeSymbol(void){
// Print the XBee symbol
goToPosition(117,1);
LCDprint(Connected_XBee_Symbol);
}
void printPCSymbol(void){
// Print the PC symbol
goToPosition(117,1);
LCDprint(Connected_PC_Symbol);
}
void printACK_Sys_files(void){
// ========== Print ACK FILE =============
// print an acknoledgment that the system is OK
// and running with no issues.
// OPEN ACK FILE
HOSTUSB.print("OPW Acknowledge.txt");
HOSTUSB.print(13, BYTE);
delay(100);
// SEND print COMMAND
HOSTUSB.print("WRF ");
// SEND THE LENGTH OF THE STRING
StartTime = millis();
HOSTUSB.print(ACK.length());
HOSTUSB.print(13, BYTE);
delay(100);
// SEND DATA
HOSTUSB.print(ACK);
HOSTUSB.print(13, BYTE);
delay(100);
// CLOSE FILE
HOSTUSB.print("CLF Acknowledge.txt");
HOSTUSB.print(13, BYTE);
delay(100);
// ========== Print SYSTEM INFO File =============
// Print the system file with:
// -> Fimware Ver.
// -> Drive Info
// -> Drive Info Extended
// -> Free Mem.
// -> Current DIR
HOSTUSB.print("OPW System.txt");
HOSTUSB.print(13, BYTE);
delay(100);
// ========== frimware version =============
//get
HOSTUSB.print("FWV");
HOSTUSB.print(13, BYTE);
String buffer, printString;
while(HOSTUSB.available() > 0){
buffer = buffer + HOSTUSB.read();
}
printString = "This is the system file. It is used to allow for\n"
"Debugging perposes. It shows the follwing:\n"
"\t-> firmware version: "+ buffer + "\n\n";
HOSTUSB.print("WRF ");
HOSTUSB.print(printString.length());
HOSTUSB.print(13, BYTE);
// print
HOSTUSB.print(printString);
HOSTUSB.print(13, BYTE);
delay(100);
// ========== free space =============
//get
HOSTUSB.print("FSE");
HOSTUSB.print(13, BYTE);
buffer = NULL;
printString =NULL;
while(HOSTUSB.available() > 0){
buffer = buffer + HOSTUSB.read();
}
printString = "\t-> free space on USB: " + buffer + "\n\n";
HOSTUSB.print("WRF ");
HOSTUSB.print(printString.length());
HOSTUSB.print(13, BYTE);
// print
HOSTUSB.print(printString);
HOSTUSB.print(13, BYTE);
delay(100);
// ========== current directory =============
// get
HOSTUSB.print("DIR");
HOSTUSB.print(13, BYTE);
buffer = NULL;
printString =NULL;
while(HOSTUSB.available() > 0){
buffer = buffer + HOSTUSB.read();
}
printString = "\t-> Current Directory: " + buffer + "\n\n";
HOSTUSB.print("WRF ");
HOSTUSB.print(printString.length());
HOSTUSB.print(13, BYTE);
// print
HOSTUSB.print(printString);
HOSTUSB.print(13, BYTE);
delay(100);
// ========== device information =============
//get
HOSTUSB.print("IDDE");
HOSTUSB.print(13, BYTE);
buffer = NULL;
printString =NULL;
while(HOSTUSB.available() > 0){
buffer = buffer + HOSTUSB.read();
}
printString = "\t-> Additionnal Info: \n" + buffer + "\n\n" +
"*********************************************\n" +
"This file is for debugging purposes only and\n" +
"should not be taken as the end all of all.\n" +
"*********************************************\n" +
"This process took approximetly: " + millis() + "\n";
HOSTUSB.print("WRF ");
HOSTUSB.print(printString.length());
HOSTUSB.print(13, BYTE);
// print
HOSTUSB.print(printString);
HOSTUSB.print(13, BYTE);
delay(100);
// LCD ACK of printing done!
goToLine(1);
LCDprint("System/ACK printed!!!");
delay(1000);
}
void printDebugSymbol(void){
// Print the Debug Symbol
goToPosition(117,1);
LCDprint('D');
}
void printUSBSTORE(void){
goToPosition(111,1);
LCDprint(USB_Store_Symbol);
}
void showSystemCom(void){
clearLCD();
// Show the Comms On the system that are activated
goToLine(2);
LCDprint("Comms Init():");
do{
// display special characters for:
// -> Xbee 'X'
// -> PC 'P'
// -> Debug 'D'
// -> Storage 'S'
// case statement
switch (Connection) {
case 'X':
goToLine(3);
LCDprint("-> XBee");
break;
case 'P':
goToLine(3);
LCDprint("-> PC-USB");
break;
default:
goToLine(3);
LCDprint(" ");
break;
}
switch (Store) {
case 'S':
goToLine(4);
LCDprint("-> Recording to USB");
break;
default:
goToLine(4);
LCDprint("-> Not Recording");
break;
}
if(LEFT_BUTTON_PRESSED){
break;
}
#ifdef ConnectedUSB
// Echo data from the VDIP back to the host if conected to a PC
processVdipBuffer();
#endif
// test buttons
test_buttons();
sendSensorValues();
#ifdef EnableLogging
FillUSBBuffers();
if(BuffersFull == 1){
printUSBBUffer();
}
#endif
}while(1);
}
void processTerminalCommands(void){
clearLCD();
// if the user decided to Store info
// to the USB drive.
#ifdef StoreUSB
// Check the logging flag,
// if the logging flag is 1
if(LoggingState && !ON){
LoggingState = 0;
//Stop Logging
closeAllFiles();
//Print to LCD
goToLine(1);
LCDprint("Stop logging");
}
// if the logging flag is 0
if(!LoggingState && ON){
LoggingState = 1;
//Start Logging
openNewFiles();
//Print to LCD
goToLine(1);
LCDprint("Start logging");
}
#endif
#ifdef USB
if(HOSTXbee.available() > 0){
char readChar = HOSTXbee.read();
// Options from Terminal:
// 1 -> start Logging
// 2 -> stop Logging
// 3 -> silent Mode
// lights off but logging ON
// 4 -> display files
// 5 -> delete files
// 6 -> directory listing
// 7 -> suspend the VDIP
// 8 -> set the VDIP to ASCII mode
// else -> Error in the input,
// Not a recognized input
if(readChar == '1'){
// Start Logging to USB
goToLine(1);
LCDprint("Started Logging");
LoggingState = 1;
ON = 1;
openNewFiles();
goToLine(2);
LCDprint(">");
}else if(readChar == '2'){
// Stop Logging to USB
goToLine(1);
LCDprint("Stopped Logging");
LoggingState = 0;
ON = 0;
closeAllFiles();
goToLine(2);
LCDprint(">");
}else if(readChar == '3'){
// Put in silent mode
goToLine(1);
LCDprint("Silent mode");
turnOffBacklight();
goToLine(2);
LCDprint(">");
}else if(readChar == '4'){
goToLine(1);
// Print File System
LCDprint("Files are written to:");
goToLine(2);
LCDprint("~\\");
goToLine(3);
LCDprint("TempData.CSV");
goToLine(4);
LCDprint("Vitals.CSV");
goToLine(5);
LCDprint("Others.CSV");
goToLine(6);
LCDprint("System.txt");
goToLine(7);
LCDprint("Acknowledge.txt");
goToLine(8);
LCDprint(">");
}else if(readChar == '5'){
// Delete files
goToLine(1);
LCDprint("Deleting files");
deleteFiles();
goToLine(2);
LCDprint(">");
}else if(readChar == '6'){
// Show the directory
goToLine(1);
LCDprint("DIR:");
goToLine(2);
readLineFromVDIP();
goToLine(3);
LCDprint(">");
}else if(readChar == '7'){
// Suspend the VDIP
goToLine(1);
LCDprint("Suspending:");
putInSuspendMode();
goToLine(2);
LCDprint(">");
}else if(readChar == '8'){
// Set ASCII mode
setToASCIIMode();
goToLine(1);
LCDprint("[OK]");
goToLine(2);
LCDprint("> ");
}else{
// Print Help Menu
goToLine(1);
LCDprint("Unrecognised command '");
LCDprintChar(readChar);
LCDprint("'");
delay(1000);
goToLine(1);
LCDprint("1 - Start logging");
goToLine(2);
LCDprint("2 - Stop logging");
goToLine(3);
LCDprint("3 - Silent Mode");
goToLine(4);
LCDprint("4 - Display Logfiles");
goToLine(5);
LCDprint("5 - Delete Logfiles");
goToLine(6);
LCDprint("6 - Directory listing");
goToLine(7);
LCDprint("7 - Suspend VDIP");
goToLine(8);
LCDprint("8 - Set to ASCII mode");
delay(1000);
goToLine(1);
LCDprint("> ");
}
}
#else
// Can't print to Serial since we are using the
// XBee layer, and we can only send AT Commands.
// Unless the XBee is in API mode we cannot send
// Serial Commands directly to the Board...
clearLCD();
goToLine(1);
LCDprint("***ERROR***");
#endif
}
//Displays the titles on the LCD screen
void display_titles(void)
{
dsp(2,0,0);
LCDprint("Period: ");
dsp(2,0,11);
LCDprint(".");
dsp(2,0,14);
LCDprint(" ms");
dsp(2,1,0);
LCDprint("Freq:");
dsp(2,1,11);
LCDprint(".");
dsp(2,1,14);
LCDprint(" hz");
dsp(2,2,0);
LCDprint("HV: ");
dsp(2,2,4);
LCDprint(".");
dsp(2,2,7);
LCDprint("V");
dsp(2,3,0);
LCDprint("LV: ");
dsp(2,3,4);
LCDprint(".");
dsp(2,3,7);
LCDprint("V");
dsp(2,3,10);
LCDprint("AVG:");
dsp(2,3,16);
LCDprint(".");
dsp(2,3,19);
LCDprint("V");
dsp(2,2,11);
LCDprint("DC:");
dsp(2,2,18);
LCDprint("%");
}
void main (void)
{
float period;
float bpm;
unsigned int intbpm;
char stringbpm[3];
// Configure the LCD
LCD_4BIT();
//initialize string
stringbpm[2] = '\0';
//PCA0MD &= ~0x40; // WDTE = 0 (clear watchdog timer enable)
PORT_Init(); // Initialize Port I/O
//SYSCLK_Init (); // Initialize Oscillator
//UART0_Init(); // Initialize UART0
TIMER0_Init();
printf("\x1b[2J"); // Clear screen using ANSI escape sequence.
printf ("Period measurement at pin P0.1 using Timer 0.\n"
"File: %s\n"
"Compiled: %s, %s\n\n",
__FILE__, __DATE__, __TIME__);
while (1)
{
// Reset the counter
TL0=0;
TH0=0;
TF0=0;
overflow_count=0;
while(P0_1!=0); // Wait for the signal to be zero
while(P0_1!=1); // Wait for the signal to be one
TR0=1; // Start the timer
while(P0_1!=0) // Wait for the signal to be zero
{
if(TF0==1) // Did the 16-bit timer overflow?
{
TF0=0;
overflow_count++;
}
}
while(P0_1!=1) // Wait for the signal to be one
{
if(TF0==1) // Did the 16-bit timer overflow?
{
TF0=0;
overflow_count++;
}
}
TR0=0; // Stop timer 0, the 24-bit number [overflow_count-TH0-TL0] has the period!
period=(overflow_count*65536.0+TH0*256.0+TL0)*(12.0/SYSCLK);
// Send the period to the serial port
printf( "\rf=%fs" , period);
bpm = 1.0/(period/60.0);
intbpm = bpm;
//printf("\nbpm=%d\n", intbpm);
LCDprint("BPM:",1,1);
int2char(stringbpm, intbpm, 2);
LCDprint(stringbpm,2,1);
}
}
