Writting to Buffer for LEd display...

#include<pic.h>
#define _XTAL_FREQ 20000000L
__CONFIG(0x3F18);

char displayPointer=0;
extern const char font[];

unsigned char buffer[26]; // buffer for screen

void interrupt ISR() // This just swaps the buffer to the display
{
if(TMR2IF) // make sure its the timer interrupt.
{
PORTB = 0; // clear old data first
if(displayPointer == 0 ) // 1st frame..
RC4 = 1; // Data = 1 on the first clock
RC3 = 1;
__delay_us(20); // Clock the shift registers
RC3 = 0;
RC4 = 0;
PORTB = buffer[displayPointer]; // Move buffer line by line
if(++displayPointer==24) // 24 LED columns
displayPointer = 0; // back to first..
}
TMR2IF = 0;
}

void display(const char* str)
{
int addr;
char x, y;
while(*str != 0) // while there is still characters
{
addr = (int) *str++ - 0x20; // get character
addr *=5;
for(y=0;y<5;y++) // 5x8 font so 5 columns
{
buffer[25] = font[addr++]; // put it in buffer
for(x=0;x<26;x++)
{
buffer[x] = buffer[x+1]; // shift all the columns <--
__delay_ms(5); // so you can see it
}
}
buffer[25] = 0; // This is the scpace between
for(x=0;x<26;x++) // the characters.. Or they will be too close
{
buffer[x] = buffer[x+1]; // shift the space in
__delay_ms(5);
} // NOTE!!! your array is 28 not 24 like mine
}
}


void main(void)
{
ADCON1 = 0x6;
T2CON = 0x1e;
PR2 = 129; // timer preload value
TMR2IE = 1; // enable timer 2 interrupt
PEIE = 1; // enable peripheral interrupt
GIE = 1; // enableglobal interrupt
TRISB = 0; // Port B as output...
TRISC = 0; // Port C as ouput...
while(1)
{
display("HELLO WORLD!!! "); // Here's the message
}
} // End main

Click to expand...

RITESH KAKKAR said:

He has not posted the code

Click to expand...

Pommie said:

With your abilities, as demonstrated by your website, you shouldn't need his code. It seems that you are very capable of writing it yourself.

Mike.

Click to expand...

Pommie said:

Should this be the standard reply to all Ritesh's posts?

Just curious.

Mike.

Click to expand...

0xA7 (Disable mouse interface) - PS/2 mode only. Similar to "Disable keyboard interface" (0xAD) command.
0xA8 (Enable mouse interface) - PS/2 mode only. Similar to "Enable keyboard interface" (0xAE) command.
0xA9 (Mouse interface test) - Returns 0x00 if okay, 0x01 if Clock line stuck low, 0x02 if clock line stuck high, 0x03 if data line stuck low, and 0x04 if data line stuck high.
0xAA (Controller self-test) - Returns 0x55 if okay.
0xAB (Keyboard interface test) - Returns 0x00 if okay, 0x01 if Clock line stuck low, 0x02 if clock line stuck high, 0x03 if data line stuck low, and 0x04 if data line stuck high.
0xAD (Disable keyboard interface) - Sets bit 4 of command byte and disables all communication with keyboard.
0xAE (Enable keyboard interface) - Clears bit 4 of command byte and re-enables communication with keyboard.
0xAF (Get version)
0xC0 (Read input port) - Returns values on input port (see Input Port definition.)
0xC1 (Copy input port LSn) - PS/2 mode only. Copy input port's low nibble to Status register (see Input Port definition)
0xC2 (Copy input port MSn) - PS/2 mode only. Copy input port's high nibble to Status register (see Input Port definition.)
0xD0 (Read output port) - Returns values on output port (see Output Port definition.)
0xD1 (Write output port) - Write parameter to output port (see Output Port definition.)
0xD2 (Write keyboard buffer) - Parameter written to input buffer as if received from keyboard.
0xD3 (Write mouse buffer) - Parameter written to input buffer as if received from mouse.
0xD4 (Write mouse Device) - Sends parameter to the auxillary PS/2 device.
0xE0 (Read test port) - Returns values on test port (see Test Port definition.)
0xF0-0xFF (Pulse output port) - Pulses command's lower nibble onto lower nibble of output port (see Output Port definition.)

Click to expand...

You need to issue commands to the keyboard to receive the correct results.

Click to expand...

Why not test the keyboard interface on an HD44780 LCD? It's the easiest, you punch in A, and if it's correct, it's an A in front.

After the PS2 interface is correct, it's much easier to hook it up to the LED board or whatever it is.

Click to expand...

RITESH KAKKAR said:

according to this he is not sending any command to ps.
**broken link removed**

Click to expand...