AVR-UART-Parse-exemple

Parsing UART commands exemple

based on www.adnbr.co.uk/articles/parsing-simple-usart-commands

uses Peter Fleury's uart library http://homepage.hispeed.ch/peterfleury/avr-software.html#libs

To compile

Adapt these lines from Makefile to match your configuration:

main.c

#define UART_BAUD_RATE 57600

Makefile

MCU = atmega16
[...]
F_CPU = 12000000
[...]
AVRDUDE_PORT = /dev/ttyUSB0    # programmer connected to serial device
[...]
AVRDUDE_SPEED = 19200
[...]
AVRDUDE_FLAGS += -b $(AVRDUDE_SPEED)

And run make && make program

To test it

#Open communication with the microcontroler)
screen /dev/ttyUSB1 57600 #for exemple with GNU/Linux

#then reset your microcontroler
#you should see a greeting message with instructions

AVR UART
Command parsing demo

End each input with enter key
This demo has two parameters: a and goto
To set a parameter: a=45 (or any number)
To query a parameter: a?
No difference with case: a? is the same thing as A?
Illegal values set parameter to zero: a=t66

#Try these
a=11<enter> #set parameter
a?<enter> #query parameter
A?<enter> #parameter names are case independant
A=98<enter>
a?<enter>
goto?<enter>
goto=t65<enter> #illegal number
goto?<enter>