program getting struck on arduino mini pro 3.3V, 8Mhz

Discuss everything related to Arduino - Open-source electronic prototyping platform allowing to create interactive electronic objects.
ayush
Posts: 4
Joined: Fri Dec 30, 2011 6:51 am

program getting struck on arduino mini pro 3.3V, 8Mhz

Postby ayush » Sat Jun 02, 2012 8:27 am

Hi,
I have integrated BMP085,GPS,SD CARD and XBEE using arduino mini pro board. But when i am serial monitoring the data output, the readings stop to come after some reading. Can u explain why it is happening?

regards,
Ayush
abhimanyu
Posts: 94
Joined: Tue Oct 18, 2011 9:49 pm

Re: program getting struck on arduino mini pro 3.3V, 8Mhz

Postby abhimanyu » Sat Jun 02, 2012 12:44 pm

Are you using he Hardware Serial Port (pins 0 and 1) for interfacing the xBee Modules?
If yes, then the Serial Stream to the Computer may bypass to the xBee. [may be]
Or, you can post your code here for a clear understanding of your problem.
ayush
Posts: 4
Joined: Fri Dec 30, 2011 6:51 am

Re: program getting struck on arduino mini pro 3.3V, 8Mhz

Postby ayush » Sat Jun 02, 2012 12:47 pm

this is the code i am using. its not that much clean:

#include <SD.h>
#include <Wire.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3);

#define PMTK_SET_NMEA_UPDATE_1HZ "$PMTK220,1000*1F"
#define PMTK_SET_NMEA_UPDATE_5HZ "$PMTK220,200*2C"
#define PMTK_SET_NMEA_UPDATE_10HZ "$PMTK220,100*2F"
#define PMTK_SET_NMEA_OUTPUT_GGAONLY "$PMTK314,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29"

#define PMTK_SET_NMEA_OUTPUT_ALLDATA "$PMTK314,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0*28"


#define BMP085_ADDRESS 0x77 // I2C address of BMP085

const unsigned char OSS = 0; // Oversampling Setting

// Calibration values
int ac1;
int ac2;
int ac3;
unsigned int ac4;
unsigned int ac5;
unsigned int ac6;
int b1;
int b2;
int mb;
int mc;
int md;

long b5;

void setup(){
Serial.begin(9600);
Wire.begin();
mySerial.begin(9600);
bmp085Calibration();
pinMode(10,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
mySerial.println(PMTK_SET_NMEA_OUTPUT_GGAONLY);

mySerial.println(PMTK_SET_NMEA_UPDATE_1HZ);
}

void loop()
{
float temperature = bmp085GetTemperature(bmp085ReadUT()); //MUST be called first
float pressure = bmp085GetPressure(bmp085ReadUP());
float atm = pressure / 101325; // "standard atmosphere"
float altitude = calcAltitude(pressure); //Uncompensated caculation - in Meters
float battery=analogRead(A1);
char gps;
Serial.print(temperature, 2); //display 2 decimal places
Serial.print(",");
Serial.print(pressure, 0); //whole number only.
Serial.print(",");
Serial.print(altitude, 2); //display 2 decimal places
Serial.print(",");
Serial.println(battery); //display 2 decimal places
Serial.print(",");
Serial.write((char)mySerial.read());
Serial.println("");

File data=SD.open("SRM.txt",FILE_WRITE);
if(data)
{

data.print("Temperature: ");
data.print(temperature,2);
data.println(",");

data.print("Pressure: ");
data.print(pressure,0);
data.println(",");

data.print("Altitude: ");
data.print(altitude,2);
data.println(",");

data.print("Battery Voltage: ");
data.print(A1);
data.println(",");

data.print("GPS Data: ");
data.print(mySerial.read());
data.println(",");

data.close();
}
}

// Stores all of the bmp085's calibration values into global variables
// Calibration values are required to calculate temp and pressure
// This function should be called at the beginning of the program
void bmp085Calibration()
{
ac1 = bmp085ReadInt(0xAA);
ac2 = bmp085ReadInt(0xAC);
ac3 = bmp085ReadInt(0xAE);
ac4 = bmp085ReadInt(0xB0);
ac5 = bmp085ReadInt(0xB2);
ac6 = bmp085ReadInt(0xB4);
b1 = bmp085ReadInt(0xB6);
b2 = bmp085ReadInt(0xB8);
mb = bmp085ReadInt(0xBA);
mc = bmp085ReadInt(0xBC);
md = bmp085ReadInt(0xBE);
}

// Calculate temperature in deg C
float bmp085GetTemperature(unsigned int ut){
long x1, x2;

x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
x2 = ((long)mc << 11)/(x1 + md);
b5 = x1 + x2;

float temp = ((b5 + 8)>>4);
temp = temp /10;

return temp;
}

// Calculate pressure given up
// calibration values must be known
// b5 is also required so bmp085GetTemperature(...) must be called first.
// Value returned will be pressure in units of Pa.
long bmp085GetPressure(unsigned long up){
long x1, x2, x3, b3, b6, p;
unsigned long b4, b7;

b6 = b5 - 4000;
// Calculate B3
x1 = (b2 * (b6 * b6)>>12)>>11;
x2 = (ac2 * b6)>>11;
x3 = x1 + x2;
b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2;

// Calculate B4
x1 = (ac3 * b6)>>13;
x2 = (b1 * ((b6 * b6)>>12))>>16;
x3 = ((x1 + x2) + 2)>>2;
b4 = (ac4 * (unsigned long)(x3 + 32768))>>15;

b7 = ((unsigned long)(up - b3) * (50000>>OSS));
if (b7 < 0x80000000)
p = (b7<<1)/b4;
else
p = (b7/b4)<<1;

x1 = (p>>8) * (p>>8);
x1 = (x1 * 3038)>>16;
x2 = (-7357 * p)>>16;
p += (x1 + x2 + 3791)>>4;

long temp = p;
return temp;
}

// Read 1 byte from the BMP085 at 'address'
char bmp085Read(unsigned char address)
{
unsigned char data;

Wire.beginTransmission(BMP085_ADDRESS);
Wire.write(address);
Wire.endTransmission();

Wire.requestFrom(BMP085_ADDRESS, 1);
while(!Wire.available())
;

return Wire.read();
}

// Read 2 bytes from the BMP085
// First byte will be from 'address'
// Second byte will be from 'address'+1
int bmp085ReadInt(unsigned char address)
{
unsigned char msb, lsb;

Wire.beginTransmission(BMP085_ADDRESS);
Wire.write(address);
Wire.endTransmission();

Wire.requestFrom(BMP085_ADDRESS, 2);
while(Wire.available()<2)
;
msb = Wire.read();
lsb = Wire.read();

return (int) msb<<8 | lsb;
}

// Read the uncompensated temperature value
unsigned int bmp085ReadUT(){
unsigned int ut;

// Write 0x2E into Register 0xF4
// This requests a temperature reading
Wire.beginTransmission(BMP085_ADDRESS);
Wire.write(0xF4);
Wire.write(0x2E);
Wire.endTransmission();

// Wait at least 4.5ms
delay(5);

// Read two bytes from registers 0xF6 and 0xF7
ut = bmp085ReadInt(0xF6);
return ut;
}

// Read the uncompensated pressure value
unsigned long bmp085ReadUP(){

unsigned char msb, lsb, xlsb;
unsigned long up = 0;

// Write 0x34+(OSS<<6) into register 0xF4
// Request a pressure reading w/ oversampling setting
Wire.beginTransmission(BMP085_ADDRESS);
Wire.write(0xF4);
Wire.write(0x34 + (OSS<<6));
Wire.endTransmission();

// Wait for conversion, delay time dependent on OSS
delay(2 + (3<<OSS));

// Read register 0xF6 (MSB), 0xF7 (LSB), and 0xF8 (XLSB)
msb = bmp085Read(0xF6);
lsb = bmp085Read(0xF7);
xlsb = bmp085Read(0xF8);

up = (((unsigned long) msb << 16) | ((unsigned long) lsb << 8) | (unsigned long) xlsb) >> (8-OSS);

return up;
}

void writeRegister(int deviceAddress, byte address, byte val) {
Wire.beginTransmission(deviceAddress); // start transmission to device
Wire.write(address); // send register address
Wire.write(val); // send value to write
Wire.endTransmission(); // end transmission
}

int readRegister(int deviceAddress, byte address){

int v;
Wire.beginTransmission(deviceAddress);
Wire.write(address); // register to read
Wire.endTransmission();

Wire.requestFrom(deviceAddress, 1); // read a byte

while(!Wire.available()) {
// waiting
}

v = Wire.read();
return v;
}

float calcAltitude(float pressure){

float A = pressure/101325;
float B = 1/5.25588;
float C = pow(A,B);
C = 1 - C;
C = C /0.0000225577;

return C;
}
abhimanyu
Posts: 94
Joined: Tue Oct 18, 2011 9:49 pm

Re: program getting struck on arduino mini pro 3.3V, 8Mhz

Postby abhimanyu » Sat Jun 02, 2012 1:49 pm

Pretty much everything is there in the code. I2C, SD Card interfacing, Software Serial for GPS, Wireless xBee...
Now, You are using Serial.print() for Hardware Serial and mySerial.print() for pins 2, 3 (for GPS).
I will suggest you to isolate the problem by first removing the xBee from the schematic and directly connecting your pro mini board to Computer through an FTDI Board. And then fire up the Serial monitor.

If that does not solves the problem, try commenting out the code for GPS. [All the mySerial.print() lines especially this: Serial.write((char)mySerial.read());]

Lets see if these steps help. Also, post your Serial Monitor output here too. [Whatever you are getting.]
ayush
Posts: 4
Joined: Fri Dec 30, 2011 6:51 am

Re: program getting struck on arduino mini pro 3.3V, 8Mhz

Postby ayush » Sat Jun 02, 2012 2:03 pm

ya. I tried omitting that but still the problem continues. But when i am testing the individual codes it is working perfectly correct without anything hanging. but now my board is not getting burned anymore but the last code is still functioning. I need to get a new board and start testing again.
abhimanyu
Posts: 94
Joined: Tue Oct 18, 2011 9:49 pm

Re: program getting struck on arduino mini pro 3.3V, 8Mhz

Postby abhimanyu » Sat Jun 02, 2012 4:44 pm

This might help. Try printing the output in separate lines. Like placing a "\n" (new line character) at the end of each Serial.print().
Or maybe use Serial.println(). See if these steps help solve the problem.

Return to “Arduino”

Who is online

Users browsing this forum: No registered users and 1 guest