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[Moved]: Volt Meter with PIC 16F877A

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stamatis2810

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Dear All,

Good day,

I am trying to make a test board in order to make a voltmeter with PIC 16F877A. Iam using a JDM Programmer in order to program pic and MIcro C Pro in order to make my hex file. Regret without results. This is the code i am trying to use without result.

Code C - [expand]
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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;
int Adread;
float voltage;
char volt[4];
void main() {
 
PORTA = 0;
TRISA = 0X01;
PORTB = 0;
TRISB = 0;
LCD_Init();
ADC_Init();
LCD_Cmd(_LCD_CURSOR_OFF);
LCD_Cmd(_LCD_CLEAR);
LCD_Out(1, 1, "Stamatis P");
delay_ms(1000);
while (1)
{
voltage = ADC_Read(0);
voltage = (voltage * 5 * 10)/ (1024);
inttostr(voltage,volt); // it converts integer value into string
Lcd_Out(2,1,"Voltage = ");
Lcd_Out(2,11,Ltrim(volt));
Lcd_Out(2,13,"Volt");
}
}


There is no problem with my programmer because i have tried with other hex files and projects. I am using also an oscillator 8 MHz at 13-14 pins with 22pf.

Your assistance is much appreciate on this matter.

Many thanks,
Stamatis
 
Last edited by a moderator:

Re: Volt Meter with PIC 16F877A

Regret without results. This is the code i am trying to use without result.
Click to expand...

You did not specify what exactly is or is not working. Isn't there anything being shown at display ? Is something shown at display, but with wrong result ?
 

Re: Volt Meter with PIC 16F877A

Dear Andre,

Thank you for your reply. There is nothing on my display at my LCD (16X2).

Many thanks and Best Regards,
 

Re: Volt Meter with PIC 16F877A

Hi,

If you don´t see "Stamatis P" on your display, then there is a basic issue.
Hardware error, power supply error, code error, microcontroller doesn´t run at all, code is not loaded in the microcontroller...

Klaus
 

Re: Volt Meter with PIC 16F877A

Dear Claus,

Thank you for your prompt reply. I have tested the code (.hex file) at Proteus simulation Program and working satisfactory. Also, i have loaded another hex on the same PIC and also works properly (to another project i have made some months before). LCD tested to another board and working also satisfactory. Because its my first time that i am using Micro C, could you please if there is any error at my code?

Many thanks and Best Regards,
 

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