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Optimize the entrey/exit code of an ISR
Hi, I have a timer overflow interrupt triggered each 32ms but I only need to process data each 128ms (1/4 of the time). I basically do: ISR() { if (!cnt--) { cnt...
Wednesday, 4 June 2008 - 17:15
Holding RESET active (low), what happens?
Hello, I have 2 AVR (Atmega88) on my board and I'm now implementing the sleep mode. The first AVR sometimes resets the second one (part of an RF module) to reinitialize the...
Wednesday, 20 June 2007 - 10:30
TWI module seems buggy in multi-master communications
I have a project with 2 ATMega48 both configured as TWI master and slave. I noticed that after a couple hours, the TWI modules stop working and I have to reset the AVR's in order...
Monday, 2 October 2006 - 11:27
SPI speed of dataflash/AVR
I need 2 AVR ATMega48 and a dataflash (AT26F004) to communicate on a SPI bus. Someone had a look and it seems it's not possible to get all this working together at 2 MHz because...
Wednesday, 17 May 2006 - 10:18
standalone AVR-AVR ISP programmer
Does someone have information on how to build a standalone avr based ISP programmer? I need to develop a production programmer for ATMega48. I thought of using an ATMega168 wich...
Tuesday, 14 February 2006 - 12:44
Bootloading the bootloader ATMega48
I need i2c self-programming in an ATMega48 ("4kb of flash, no Read-While-Write support, and no separate Boot Loader Section. The SPM instruction can be executed from the entire...
Sunday, 15 January 2006 - 11:27
Updating avr-libc on Windows
The latest version of WinAVR includes avr-libs 1.2.3 and I need updates from 1.2.5 for my atmega88. Is there any way to update my libraries from the avr-libc tarball ? Sorry if...
Tuesday, 11 October 2005 - 15:35