Can anyone please check my code? Is not working

[zhiling0229]

Hi guys,

I'm using PIC16F877A with CCS C compiler to develop my program. Initially I used portC and portD but I decided to change to portA and portB but after changing is not working? Can anyone point out the problem in my code:

struct lcd_pin_def
{
BOOLEAN cd; // A0 Command/Data BAR 1=command 0=data
BOOLEAN r_bar; // A1 Read bar active low
BOOLEAN w_bar; // A2 Write bar active low
BOOLEAN reset_bar; // A3 Reset active low
BOOLEAN unused1; // A4
BOOLEAN unused2; // A5
BOOLEAN unused3; // A6
BOOLEAN unused4; // A7
int data : 8; // PortB=Data bus
};
struct lcd_pin_def LCD;

#byte LCD = 0x05 // portA address on 16F877A

#use fast_io(D)

void main() {

setup_adc(ADC_OFF);

set_tris_a(0x00); // graphic lcd control lines all output
}

thanks

 

[aandavan]

hi
Since port A has analog and digital mode you have to configure the Port A as analog or digital by setting the ADCON register. Moreover port A has only 6 bits.

 

[zhiling0229]

Sorry guys,

I think i have misrepresented the information. Let me clarify. I'm a noob in C but I took the sample a driver program on the net. It uses port C and port D. I tested it, it was working fine but when I change it to port B and port A it did not work.

I just need to verify with you guys is my C correct since the only command I found in the help file to off the ADC is
setup_ADC(ADC_OFF);

Due to lack of documentation I need to verify is this command equivalent to:

changing the ADCON1 to 0x06 in a PIC16F877A or do i need more than just that C command?

thanks