Using the ATmega323 port for ATmega8515
Posted by Philipp Adelt
on October 19, 2004
This works by adjusting the bit positions for the Timer1 Compare Match A interrupt.
In file Source/portable/GCC/ATMega323/port.c on line 52 you will find:
#define portCOMPARE_MATCH_A_INTERRUPT_ENABLE( ( unsigned portCHAR ) 0x10 )
Replace this with:
#define portCOMPARE_MATCH_A_INTERRUPT_ENABLE( ( unsigned portCHAR ) (1<<OCIE1A) )
This works for ATmega8515 and should for ATmega323 and others. At least with AVR-GCC, as include/avr/io.h defines the neccessary bit positions. I think using these is a better idea than hard coding them, but I don't know if IAR will work with this as well. If it does I can provide a version where the other constants are generalized this way too.
Thanks for making the FreeRTOS-stuff public!
RE: Using the ATmega323 port for ATmega8515
Posted by Richard
on October 20, 2004
Thanks for your ideas.
I will update the AVR demo soon so the downloaded demo is targeted at one of the newer devices. The aim would be to make it portable accross all devices with no mods required.
Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd..
See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.