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Sony Ericson GM29

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BusyStudent2000
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Sony Ericson GM29

Posted: Mon Jan 05, 2009 4:58 am

Hi im trying to design a signal tester, and I seem to be getting good results with any other modem.

This source code works perfectly with a wavecom FASTRACK modem.

Code:

#if defined(__PCM__)
#include <16F876.h>
#device adc=8
#fuses XT,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOLVP,NODEBUG
#define LOWTOHIGH TRUE
#define HIGHTOLOW FALSE
#use delay(clock =4032000,XTAL)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,BRGH1OK)
#define BUFFER_SIZE 96
char buffer[BUFFER_SIZE];
int buffer_used=0;
#int_rda
void serial_isr() //A serial intterupt which stores the each character in a buffer/array for later use.
{
buffer[buffer_used]=getc(); // Stores the size of the buffer
output_low(pin_a4); //Sync LED shows that the device have recieved a response from the modem
if (buffer_used == 94) //If there was an error, which Led to the device and the modem not communicating
buffer_used =0; //the buffer would not overflow, the effect is the device not freezing and enables it to retry.
buffer_used++; //Increasing the buffer with each succesfull character recieved
}
#include <stdlib.h>
#include <stdio.h>
int high=8,low=8,Nsignal_strength=88; //Initializing the device with a signal strength which does not exist
byte signal_check=0,reset_modem=0,output_signal=0; //Initializing A/D convertes *note output_signal only for debugging issues.
void output_buffer();
//void readbuffer();
void flash();
void reset();
void determine_strength();
void main()
{
enable_interrupts(global);
enable_interrupts(int_rda);
setup_adc_ports(AN0_AN1_AN3);
setup_adc(ADC_CLOCK_INTERNAL);

delay_ms(100);output_low(pin_b0);delay_ms(100);output_high(pin_b0);
delay_ms(100);output_low(pin_b1);delay_ms(100);output_high(pin_b1);
delay_ms(100);output_low(pin_b2);delay_ms(100);output_high(pin_b2);
delay_ms(100);output_low(pin_b3);delay_ms(100);output_high(pin_b3);
delay_ms(100);output_low(pin_b4);delay_ms(100);output_high(pin_b4);//Start up as well as all LEDS must work
delay_ms(100);output_low(pin_b5);delay_ms(100);output_high(pin_b5);
delay_ms(100);output_low(pin_b6);delay_ms(100);output_high(pin_b6);
delay_ms(100);output_low(pin_b7);delay_ms(100);output_high(pin_b7);

delay_ms(100);output_low(pin_b7);delay_ms(100);output_high(pin_b7);
delay_ms(100);output_low(pin_b6);delay_ms(100);output_high(pin_b6);
delay_ms(100);output_low(pin_b5);delay_ms(100);output_high(pin_b5);
delay_ms(100);output_low(pin_b4);delay_ms(100);output_high(pin_b4);
delay_ms(100);output_low(pin_b3);delay_ms(100);output_high(pin_b3);//Start up as well as all LEDS must work
delay_ms(100);output_low(pin_b2);delay_ms(100);output_high(pin_b2);
delay_ms(100);output_low(pin_b1);delay_ms(100);output_high(pin_b1);
delay_ms(100);output_low(pin_b0);delay_ms(100);output_high(pin_b0);

while (1)
{
set_adc_channel( 0 );delay_us(200); //Enabling the A/D
signal_check=read_adc();delay_us(200);
set_adc_channel( 1 );delay_us(200);
reset_modem=read_adc();delay_us(200);
// set_adc_channel( 3 );delay_us(200);
// output_signal=read_adc();delay_us(200);
if (signal_check > 30) //If singal check pressed let status LED flash
{
output_low(pin_a5);
delay_ms(100);
output_high(pin_a5);
delay_ms(100);
output_low(pin_a5);
delay_ms(100);
output_high(pin_a5);
putc('A');delay_ms(1);putc('T');delay_ms(1);putc('+');delay_ms(1);putc('C');delay_ms(1);putc('S');delay_ms(1);putc('Q');delay_ms(1);putc(0x0D);putc(0x0A);
delay_ms(1); //Sends instruction twice to modem for extra rebiality
putc('A');delay_ms(1);putc('T');delay_ms(1);putc('+');delay_ms(1);putc('C');delay_ms(1);putc('S');delay_ms(1);putc('Q');delay_ms(1);putc(0x0A);putc(0x0D);
determine_strength(); //Calls the function which determines the signal strength
output_high(pin_a5);

}
if (reset_modem >5) //If reset modem pressed let status LED blinb
{
output_low(pin_a5);
putc('A');delay_ms(1);putc('T');delay_ms(1);putc('Z');delay_ms(1);putc(0x0D);putc(0x0A);
delay_ms(1);
putc('A');delay_ms(1);putc('T');delay_ms(1);putc('Z');delay_ms(1);putc(0x0A);putc(0x0D);
delay_ms(1);
// output_buffer(); //Calls the function to reset the modem
reset();
delay_ms(100);
output_high(pin_a5);
}
// if (output_signal > 5) //debuggin purposes only
// output_buffer();

//Displaying signal strength
if ((Nsignal_strength <=31)&& (Nsignal_strength >28)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2); output_low(pin_b3); output_low(pin_b4); output_low(pin_b5); output_low(pin_b6); output_low(pin_b7);}
if ((Nsignal_strength <=28)&& (Nsignal_strength >24)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2); output_low(pin_b3); output_low(pin_b4); output_low(pin_b5); output_low(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=24)&& (Nsignal_strength >21)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2); output_low(pin_b3); output_low(pin_b4); output_low(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=21)&& (Nsignal_strength >17)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2); output_low(pin_b3); output_low(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=17)&& (Nsignal_strength >14)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2); output_low(pin_b3);output_high(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=14)&& (Nsignal_strength >10)){ output_low(pin_b0); output_low(pin_b1); output_low(pin_b2);output_high(pin_b3);output_high(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=10)&& (Nsignal_strength >7 )){ output_low(pin_b0); output_low(pin_b1);output_high(pin_b2);output_high(pin_b3);output_high(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=7) && (Nsignal_strength >3 )){ output_low(pin_b0);output_high(pin_b1);output_high(pin_b2);output_high(pin_b3);output_high(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}
if ((Nsignal_strength <=3) && (Nsignal_strength >=0)){output_high(pin_b0);output_high(pin_b1);output_high(pin_b2);output_high(pin_b3);output_high(pin_b4);output_high(pin_b5);output_high(pin_b6);output_high(pin_b7);}

//No signal
if ((Nsignal_strength ==99)){flash();}
}

}

void flash()
{
int j;
for ( j=0;j<=3;j++)
{
delay_ms(100);
output_low(pin_b0); //lets the LED's flash for indication purposes
output_low(pin_b1);
output_low(pin_b2);
output_low(pin_b3);
output_low(pin_b4);
output_low(pin_b5);
output_low(pin_b6);
output_low(pin_b7);
delay_ms(100);
output_high(pin_b0); //lets the LED's flash for indication purposes
output_high(pin_b1);
output_high(pin_b2);
output_high(pin_b3);
output_high(pin_b4);
output_high(pin_b5);
output_high(pin_b6);
output_high(pin_b7);
}
}
void output_buffer() // debugging purposes only to check what is stored in the buffer
{
int size;
printf("Buffer =>\n");
for (size=0;size<=buffer_used;size++)
putc(buffer[size]);
}
void reset()
{
int i=0;
boolean flag;
While ((flag==true) && (i <= buffer_used)) //Check untill first consective OK or untill buffer completely checked
{
if (buffer[i]== 'O') //As soon as device recieves the first OK its stops searching
if ((buffer[i+1] == 'K')) //Flashes LED's to indicate device (buffer) and modems been reset.
{flag=true;flash();}
i++;
}
buffer_used=0; //resets buffer
Nsignal_strength=0; //resets signal strength
}
void determine_strength()
{ // PIC does not to appear to have ability to perform the function itoa
int i=0; // own sourcecode was supplied
boolean flag=false,single=false,number=false;
While ((flag==false) && (i <= buffer_used)) //Checks the whole buffer or until a number is found
{
switch (buffer[i])
{
case '0':{high=0;number=true;break;} //When the number 0..3 indicate that it is a number
case '1':{high=1;number=true;break;}
case '2':{high=2;number=true;break;}
case '3':{high=3;number=true;output_low(pin_b5);break;} //if number is 3 put LED 5 on debugging purpose only
case '4':{high=4;number=true;flag=true;single=true;break;} //when number 4..9 indicate it is anumber and a single digit
case '5':{high=5;number=true;flag=true;single=true;break;}
case '6':{high=6;number=true;flag=true;single=true;break;}
case '7':{high=7;number=true;flag=true;single=true;break;}
case '8':{high=8;number=true;flag=true;single=true;break;}
case '9':{high=9;number=true;flag=true;single=true;break;}
}
if (number==true){ //checks if the next character is a number
if (buffer[i+1]=='0'){low=0;flag=true;} //if it is a number, then it is dubble digit
if (buffer[i+1]=='1'){low=1;flag=true;output_low(pin_b6);} //if second digit is a 1 output LED 6 debug purposes only
if (buffer[i+1]=='2'){low=2;flag=true;}
if (buffer[i+1]=='3'){low=3;flag=true;}
if (buffer[i+1]=='4'){low=4;flag=true;}
if (buffer[i+1]=='5'){low=5;flag=true;}
if (buffer[i+1]=='6'){low=6;flag=true;}
if (buffer[i+1]=='7'){low=7;flag=true;}
if (buffer[i+1]=='8'){low=8;flag=true;}
if (buffer[i+1]=='9'){low=9;flag=true;}
if(buffer[i+1]==','){single=true;} //if the next character is , it is a single number this is for numbers 0..3 only
}

i++;
}
if (single==false) //If it is not a single number calculate the signal strength with both numbers
{Nsignal_strength=high*10 + low;}
if (single==true) //If it is a single number determine signal strength with first digit
{Nsignal_strength=high;}
output_low(pin_b7); //Output LED 7 and 6 if procedure finished
output_low(pin_b6); //*note first time modems misses first character so LED 7 &6 will always show first time
buffer_used=0; //resets buffer
}

I have tried printf, it works also with the other modems but with the Sony ericson gm29 I don't even get an echo interrupt (when a serial interrupt occurs it puts a LED on). Both the modems works with normal hyperterminal so does anyone know if the gm29 works different or am I doing something wrong, please help

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