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Currently, i have both humidity and temperature sensor in my circuit where the readings is output to a LCD_module. But i wonder how can I retrieve this temperature and humidity readings from the PIC16 ...

The below codes is taken directly from the ccs kbd.c, and i want to change it to apply in PORT_D(i am using PIC16F877A ). What
changes i should make to the code?

Furthermore, what are this value ...

If i intend to use this 4x4 keypad code and applied it to my PORT_D then i should comment out the followings:

//set_tris_b(0xF0);
//output_b(0xF0);
//port_b_pullups(true);

And i should applied ...

Thanks for the reply, i think my PIC burn out due to over voltage (it really get hot), it shouldn't be the problem with the programmer.
Because i am drawing voltage from the ac to dc adaptor at (9V s ...

I have gone through the review that you have directed me to, it really help thanks.

But from your 4x4 keypad driver i still have some doubt on the following line:

void kbd_init()
{ ...

I have encountered some problems, when I am using a new PIC16F877 and try to program the coding onto it. At the first few times of trying it works just fine, but then the error come in like exp: rom e ...

1) I come across to your keypad driver coding and notice that the following:

void kbd_init()
{
//set_tris_b(0xF0);
//output_b(0xF0);
port_b_pullups(true);
}

Do we need to unchecked t ...

From the code below, it only define lcd pin4 to pin7 how about lcd pin0 to pin3 not using it?

#define LCD_DB4 PIN_D0
#define LCD_DB5 PIN_D1
#define LCD_DB6 PIN_D2
#define LCD_DB7 PIN_ ...

I am currently need to connect 4x4 kepad to the hd44780 lcd driver with 40 pin pic16f874A, and I'm using ccs c compiler. I am new to c programming, can someone guide me on the hardware connection of t ...