2001 Microchip Technology Inc. DS39024B-page 81
PICDEM™ 17 DEMONSTRATION
BOARD USER’S GUIDE
12
Appendix B. RS-232 Communication ProtocolB.1 INTRODUCTION
This appendix describes the protocol between the PIC17C756A
microcontroller and the Host PC.
B.2 OVERVIEW
The PICDEM 17 Monitor program and associated firmware in the
PIC17C756A communicate via a RS-232 link between the serial port on the
PC and the USART2 module on the PICmicro® MCU. The format is 9600
baud, no parity, 8 data bits, and 1 stop bit. The protocol itself is plain ASCII
text, which means that any terminal program can be used to communicate
with the firmware. The Monitor program was developed as a convenience to
the user. When using a terminal program, the *H command will display all the
available commands to the user. Descriptions of the operation of the
diagnostics are given in Chapter 2.
B.3 DETAILED DESCRIPTION
The following are all the commands and associated description s:
•*A Halt Operation
•*DA A/D Diagnostic
•*DC Capture Diagnostic
•*DF Flash Diagnostic
•*DI I2C Diagnostic
•*DL LCD Diagnostic
•*DP PWM Diagnostic
•*DS Switch Diagnostic
•*DU2 USART2 Diagnostic
•*E Erase FLASH
•*F Download File
•*H Print Help
•*J Run Program
•*RDbxx Read Data Mem
•*Rpyyyy Read Prog Mem
•*WDbxxdd Write Data Mem
•*WPyyyydddd Write Prog Mem