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ADC8 (temperature sensor) definition?
I've been testing out the internal temperature sensor on a number of AVRs, and would like to make my code more portable. On the t84, t88 and m328, setting MUX to ADC8 gets the...
Tuesday, 25 March 2014 - 00:44
looking for AVR makefile template including fuse settings
I'm looking for a makefile template that includes fuse settings - something I can use with picoboot and picoboot-stk500. I've looked at the makefile for optiboot and the makefile...
Monday, 24 March 2014 - 15:00
erroneous reference to EEARH for t48/t88
Section 5.3 of the ATtiny88 datasheet refers to EEARH, but the devices have only EEARL since eeprom size is
Monday, 24 March 2014 - 01:04
AVR price hikes
I've noticed digi-key has significantly increased the prices on AVR MCUs. A couple examples of the old and new q25 pricing: ATtiny88-au: 56c/102c ATtiny85-20pu: 84c/136c...
Sunday, 23 March 2014 - 22:39
Watch out for undefined assembler arguments
In picoboot-STK500, I had a bug that I would have expected the assembler (gcc-gas) to catch, but it didn't: Default: ; read to EOP and respond with INSYNC rcall RxByte cpi...
Thursday, 20 March 2014 - 22:52
While doing more bootloader work, I notice most AVRs define bit 0 of SPMCSR as SPMEN, yet a few (like the ATMega328) define it as SELFPRGEN. They do the same thing, it's the same...
Wednesday, 19 March 2014 - 20:28
watchdog timer frequency definitions?
I'm looking for definitions (i.e. a header file) with typical watchdog timer frequencies for various parts. avr-libc's wdt.h just has generic definitions like: /** \ingroup...
Tuesday, 18 March 2014 - 17:01
picoboot beta 2
I've just released beta 2 of picoboot. There are no changes to the bootloader code - just to picoboot-avrdude. Instead of erasing as pages were written, it now implements chip...
Tuesday, 18 March 2014 - 04:53
how to synchronize 2 code repositories?
I'm working on a couple of projects that include the code from another project (i.e avrdude, v-usb). I'm trying to figure out how I can keep my copy of the code in sync, but so...
Friday, 14 March 2014 - 14:57
aspspi - USBasp SPI terminal
I made a modified version of avrdude's usbasp module to make an interactive SPI terminal for debugging nrf24l01 modules. It should work for any device using SPI communication...
Thursday, 13 March 2014 - 02:42
empty interrupt
I'm trying to test out sleep mode and using the watchdog timer to wake up. I define WDT_vect as an empty interrupt: EMPTY_INTERRUPT(WDT_vect); Which generates an ISR with a...
Wednesday, 12 March 2014 - 02:20
sleep mode dn_003 out of date?
The design note says: When waking up from Power-save mode or Power-down mode by an external interrupt, a number of instruction cycles are executed before the interrupt flags are...
Tuesday, 11 March 2014 - 02:40