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#
# $Id$
#
PS1 Keyboard Interface Don Carveth July 2002
PS-2 (PC-AT) style keyboard interface.
Mirrors all characters typed on PC-AT keyboard on terminal connected to UART.
Based on Atmel App Note AVR-313
Converted supplied c code to GCC 3.2
Based on ATMEGA163 at 8 MHz
*********** REVISION HISTORY **************************
Rev 0 Creation 8/30/02
Converted from IAR to GCC
Operational.
*********** OPERATION *********************************
Connect PS-2 keyboard as shown below - see App note for connection info
Connect UART to terminal program at 19200 baud, 8N1
All standard keys pressed will mirror on terminal. Shift works, <ctrl> and
<alt> have no effect.
Hit <F1> to alternate between character mode and hex code representation.
Connect an LED to PD5 to ensure the program is running.
Use the test pin at PB1 to monitor progress. Insert test_pin() commands in
the program to toggle the pin - watch on your scope. Only need
for debugging.
To change processor or crystal make changes in StdDefs.h.
Select between polled and interrupt driven UART transmit (putchar) in StdDefs.h
*********** RESOURCES *********************************
Processor: ATMega163
Crystal: 4 MHz
Flash size: 0x7e6 (2022)
RAM Used: 0x9c (156)
EEPROM Used: 0
Pins used:
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5 MOSI - ISP,
PB6 MISO - ISP,
PB7 SCK - ISP
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PD0 UART Rcv
PD1 UART Txd
PD2 INT0 - Clock
PD3 INT1 - Data
PD4
PD5 Run LED
PD6
PD7
Interrupts:
INT0 - PS-1 Keyboard clock
Timers:
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