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thurein
Joined: 15 Sep 2016
Posts: 4
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| About ps2 keyboard emulator |
 Posted: Thu Sep 15, 2016 5:03 am |
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I'm newbie in ccs pic c and pic micro-controllers.
I search in this forum and google about ps2 keyboard emulators.
But no code work well.
Can someone help me with working code for 16F628A and ccs c.
Thanks |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19520
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| Posted: Thu Sep 15, 2016 6:57 am |
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This worked fine:
<http://www.ccsinfo.com/forum/viewtopic.php?t=25673&highlight=ps2>
If it doesn't, you have a problem with your hardware. |
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temtronic
Joined: 01 Jul 2010
Posts: 9229
Location: Greensville,Ontario
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| Posted: Thu Sep 15, 2016 7:13 am |
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Well there's 2 different 'emulators'...
The one Mr T points to goes between a PS2 kbd and 'something else'.
The ones I did go between a custom keyboard switch array and send PS2 formatted data to a PC.
You need to tell us more of what you really need to do.
Jay |
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thurein
Joined: 15 Sep 2016
Posts: 4
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| Posted: Thu Sep 15, 2016 8:31 am |
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Thanks for your reply.
My project is read data from IR Remote and send these to computer as PS2 keyboard.
Get from IR is ok, but can't send to PC. |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Thu Sep 15, 2016 4:53 pm |
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what does your circuit hardware look like ?
your working code ?
and what compiler version? |
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thurein
Joined: 15 Sep 2016
Posts: 4
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| Posted: Fri Sep 16, 2016 2:13 am |
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Circuit is very simple.
Pin B0 is connect to PS2 Clock line and B1 is to Data Line.
Compiler version is 5.015 and I use following code I found in this post
http://www.ccsinfo.com/forum/viewtopic.php?t=27544
| guntor wrote: | Maybe someone need a PS2 Keyboard emulator
| Code: |
#include <12F675.h>
#fuses INTRC_IO,NOWDT,NOMCLR,NOPROTECT
#use delay(clock=4000000)
#use rs232(baud=9600,parity=N,xmit=PIN_A0,rcv=PIN_A1,bits=8,STREAM=DEBUG)
#use rs232(baud=9600,parity=N,xmit=PIN_A3,rcv=PIN_A2,bits=8,STREAM=RFID)
//#define DEBUGLONG
//#define DEBUGSHORT
#define KEYCLK PIN_A5
#define KEYDATA PIN_A4
typedef unsigned char uchar;
typedef boolean bit;
/*
-----
[+5V] VDD -|1 8|- VSS [GND]
[KEYCLK] (with Pullup) GP5/T1CKI/OSC1/CLKIN -|2 7|- GP0/AN0/CIN+/ICSPDAT [XMIT DEBUG]
[KEYDATA] (with Pullup) GP4/AN3/T1G/OSC2/CLKOUT -|3 6|- GP1/AN1/CIN-/VREF/ICSPCLK [RCV DEBUG]
GP3/MCLR/VPP -|4 5|- GP2/AN2/T0CKI/INT/COU
-----
*/
// A-Z, völlig willkürliche anordnung...
// http://www.computer-engineering.org/ps2keyboard/scancodes2.html
// Für break Code: vorher 0xF0 senden, dann wieder Code
const uchar t_a_z[26]={0x1C,0x32,0x21,0x23,0x24,0x2B,0x34,0x33,0x43,0x3B,0x42,0x4B,0x3A,0x31,0x44,0x4D,0x15,0x2D,0x1B,0x2C,0x3C,0x2A,0x1D,0x22,0x35,0x1A};
// 0-9, völlig willkürliche anordnung...
const uchar t_0_9[26]={0x45,0x16,0x1E,0x26,0x25,0x2E,0x36,0x3D,0x3E,0x46};
// ASCII translatedtoScantable
uchar atrsc[2];
uchar lastbyte;
void sendNibble(boolean t);
bit getNibble();
void sendByte(byte sendbyte);
uchar receiveByte();
void senduchar(uchar sendb) ;
void translateASCIItoScanTable(uchar ASCII,uchar extended);
void sendString(uchar* str);
// SetBit: Einzelnes Bit senden...
//
// .... ......... ........
// | |...,....| |........| |........
// 10 w 30 40
//
void sendBit(boolean t){
delay_us(10);//15
output_bit(KEYDATA,t);
delay_us(30); //20
output_low(KEYCLK);
delay_us(40); //40
output_high(KEYCLK);
}
// getBit: Einzelnes Bit empfangen...
//
// .... ......... ........
// | |........| , |........| |........
// 40 15 r 20
bit getBit(){
bit t;
output_low(KEYCLK);
delay_us(40);
output_high(KEYCLK);
delay_us(15);
t=input(KEYDATA);
delay_us(20);
return t;
}
void sendByte(byte sendbyte){
uchar i;
byte parity = 0;
bit t = 0;
// ausgangslage
output_high(KEYCLK);
output_low(KEYDATA);
// Delay, falks mehrere Bytes hintereinander gesendet werden...
delay_us(250);
// startbit
output_high(KEYCLK);
sendBit(0);
for(i=0;i<8;i++){
t=bit_test(sendbyte,i);
if(t)parity++;
sendBit(t);
}
// Parity Bit
t=~bit_test(parity,0);
sendBit(t);
// Stop bit
sendBit(0);
lastbyte=sendbyte;
input(KEYCLK);
input(KEYDATA);
}
uchar receiveByte(){
uchar empf;
uchar parity;
uchar i;
bit t;
bit stopbit;
// ignore startbit???
// Generate Clock and receive bits.. LSB first...
for(i=7;i!=0;i--){
t=getBit();
if(t){
parity++;
empf|=t<<i;
}
}
// parity bit...
t=getBit();
// stop bit...
stopbit=getBit();
if(stopbit!=1){
#ifdef DEBUGLONG
fprintf(DEBUG,"Falsches Stopbit");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"fsb");
#endif
}
// ACK senden...
delay_us(10);
output_low(KEYDATA);
delay_us(25);
output_low(KEYCLK);
delay_us(40);
output_high(KEYCLK);
if(t!=~bit_test(parity,0)){
#ifdef DEBUGLONG
fprintf(DEBUG,"Haha, partity falsch");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"fp");
#endif
}
#ifdef DEBUGLONG
fprintf(DEBUG,"empfanges byte %x",empf);
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"eb %x",empf);
#endif
return empf;
}
void senduchar(uchar sendb) {
uchar empf;
unsigned int16 breaker;
disable_interrupts(GLOBAL);
//Summary: Bus States
//Data = high, Clock = high: Idle state.
//Data = high, Clock = low: Communication Inhibited.
//Data = low, Clock = high: Host Request-to-Send
while(true){
// Host will was...
if(input(KEYCLK)==0 && input(KEYDATA)==1){
#ifdef DEBUGLONG
fprintf(DEBUG,"dammed, not free");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"nf");
#endif
// 50ms zeit, um Data low zu ziehen und Clock auf high
// Dann dürfen wir Clock spielen und nibbles empfangen...
breaker=0;while(input(KEYDATA)==1&&input(KEYCLK)==0&&breaker<0xFFFFF)breaker++; // Wait for 0
breaker=0;while(input(KEYCLK)==0&&breaker<0xFFFFF)breaker++; // Wait for 0
#ifdef DEBUGLONG
fprintf(DEBUG,"ready to receive");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"rr");
#endif
// receive Byte
empf=receiveByte();
#ifdef DEBUGLONG
fprintf(DEBUG,"empfanges byte %x",empf);
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"eb %x",empf);
#endif
// Reset Keyboard (Too fast, false parity etc...)
if(empf==0xFF){
// Acknowledge
sendbyte(0xFA);
// BAT erfolgreich...
sendbyte(0xAA);
#ifdef DEBUGLONG
fprintf(DEBUG,"Bytes sent.");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"bs");
#endif
// Resend last byte...
}else if(empf==0xFE){
sendbyte(lastbyte);
}
// Wenn Frei (CLK = HIGH),
// Schauen, ob nach 50us immer noch frei, dann frei zur verwendung...
}else{
delay_us(50);
if(input(KEYCLK)==1){
break;
}
}
}
#ifdef DEBUGLONG
fprintf(DEBUG,"yeah, free");
#endif
#ifdef DEBUGSHORT
fprintf(DEBUG,"f");
#endif
// Todo: special caracters
translateASCIItoScanTable(sendb,0x00);
// Todo: uppercase
if(atrsc[1]!=0x00){
sendbyte(atrsc[1]);
}
// Send Make Key...
sendbyte(atrsc[0]);
// Ssend Break Key...
sendbyte(0xF0);
sendbyte(atrsc[0]);
if(atrsc[1]!=0x00){
sendbyte(0xF0);
sendbyte(atrsc[1]);
}
// Not too many keys per second
delay_ms(20);
enable_interrupts(GLOBAL);
}
void translateASCIItoScanTable(uchar ASCII,uchar extended){
if(ASCII>='A' && ASCII<='Z'){
atrsc[0]=t_a_z[ASCII-'A'];
atrsc[1]=0x12;
}else if(ASCII>='a' && ASCII<='z'){
atrsc[0]=t_a_z[ASCII-'a'];
atrsc[1]=0x00;
}else if(ASCII>='0' && ASCII<='9'){
atrsc[0]=t_0_9[ASCII-'0'];
atrsc[1]=0x00;
// Rest of Translation Table
// layout spefific!!
// layout: http://upload.wikimedia.org/wikipedia/commons/2/22/KB_US-International.svg
// http://www.computer-engineering.org/ps2keyboard/scancodes2.html
}else if(ASCII>=' ' && ASCII<=' '){
//atrsc[0]=t_a_z[ASCII-'A'];
atrsc[0]=0x29;
atrsc[1]=0x00;
}
}
void sendString(uchar* str){
while(*str!=0x00){
senduchar(*str);
str++;
}
}
void main() {
while(TRUE){
strcpy(RFID_rec.data,"ABCDE532d");
sendString(RFID_rec.data);
delay_ms(2500);
}
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Sep 16, 2016 10:16 am |
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| Quote: | Circuit is very simple.
Pin B0 is connect to PS2 Clock line and B1 is to Data Line. |
The program you posted uses Pins A5 and A4 for clock and data.
You need to modify the program as shown below. Then recompile it
and program it into your PIC:
| Code: | #define KEYCLK PIN_B0
#define KEYDATA PIN_B1 |
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thurein
Joined: 15 Sep 2016
Posts: 4
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| Posted: Fri Sep 16, 2016 11:23 pm |
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| PCM programmer wrote: | | Quote: | Circuit is very simple.
Pin B0 is connect to PS2 Clock line and B1 is to Data Line. |
The program you posted uses Pins A5 and A4 for clock and data.
You need to modify the program as shown below. Then recompile it
and program it into your PIC:
| Code: | #define KEYCLK PIN_B0
#define KEYDATA PIN_B1 |
|
I already change PINs.
Now I can send keyboard codes from PS2 to USB controller.
But when I send one code sometime others characters are appear in Notepad . Sometime repeated characters.
I can't send key codes directly to PS2 port of computer. |
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