measuring angle with Accelerometer using pic16f887

[prathap reddy]

the following program based on using pic16f887 and adxl330 type accelerometer to measure the tilt angle and displayed on LCD.but i am unable to get output. can any one help?

sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D7_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
signed int x_acc,y_acc,z_acc;
signed int ZeroGx,OneGx,ZeroGy,OneGy;
signed int Counts_PerG_x,Counts_PerG_y;
float Gx,Gy,angle;
Read_Acceleration()
{
x_acc=Adc_Read(0);
y_acc=Adc_Read(1);
z_acc=Adc_Read(2);
}
Init_ADC()
{
ANSEL=0x07;
ANSELH=0;
TRISA=0x07;
ADCON0=0x81;
ADCON1=0x80;
}
void main()
{
Init_ADC();
Lcd_init();
ZeroGx=384;
OneGx=465;
ZeroGy=380;
OneGx=460;
Counts_PerG_x= OneGx -ZeroGx;
Counts_PerG_y= OneGy –ZeroGy;
for(;
{
Read_Acceleration();
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"INCLINOMETER");
Gx=(float)(x_acc-ZeroGx)/ Counts_PerG_x;
Gy=(float)(y_acc-ZeroGy)/ Counts_PerG_y;
angle=atan2(Gy,Gx);
angle=angle*180.0/3.14;
FloatToStr(angle,txt+6);
Lcd_Out(2,1,txt);
Delay_Ms(500);
}
}

 

[nikhilele]

what result you are getting

 

[prathap reddy]

thank u for ur reply... compilation is successful but it gives DEMO LIMIT error.

 

[Kripton2035]

quite easy.. I dont know what software you're using (mikroe C ???) but it seems that it is a demo version
and that you have made a program too big to be compiled under the demo version
buy the software and the error will disappear !

 

[prathap reddy]

thank you very much...
now i have one more doubt.........
i did two modules individually..
1)ADC module
2) Accelerometer module(what i mentioned earlier)
now i want to combine these two modules and send result angle and digital info to main program. what are the modifications i need to do?...
the following code is my adc module.......
i am using mikro c only........
unsigned int temp_res;

// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;

sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections

char txt1[] = "ADC Example";
char txt[7];
void main() {
/////////// comment for 877/////////////////////////////////////
ansel=4; // Configure AN2 pin as analog
anselh=0;
c1on_bit=0;
c2on_bit=0;
////////////////////////////////////////////////////////////////
TRISA = 0xFF; // PORTA is input
Lcd_Init();
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Out(1,1,txt1);
adc_init();
do {

temp_res = ADC_read(2); // Get 10-bit results of AD conversion
IntToStr(temp_res, txt); //int to string conversion
Lcd_Out(2,1,txt);
} while(1);
}

---------- Post added at 10:49 ---------- Previous post was at 10:18 ----------

my project is sign language to text translation for indian sign language by using 10 flex sensors, two accelerometers, pic 16f887