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Reset required after doing SPM -- or can the SPMEN bit in SPMCR be trusted?
I have a modified version of the  AVR231 bootloader--actually modified version of  the port to gcc that's posted on this website.   After all the application code...
Wednesday, 13 May 2015 - 22:52
Adapting Custom Atmega Bootloader for use on Attiny84
I did a custom bootloader that used a wireless interface with AES encryption based on app note AVR231. Thanks for this forum for having the app note code ported to GCC!   It'...
Saturday, 9 May 2015 - 16:17
Atmega328p--Powering down timer2 in Async mode
I implemented an RTC using a 32.768 Khz crystal on Tosc1/2.     It works great, but the power impact is very large in my application.  Normally, the procesor sleeps...
Wednesday, 22 April 2015 - 23:13
Chip Erase to Clear Lock bits--Serial or Parallel (HV)?
I'm thinking about using some lock bits on an Atmega 328p.   For some of them, the spec states they can only be cleared via a chip erase   A chip erase can be done using...
Sunday, 22 March 2015 - 17:50
How to Debug Bootloaded code--AVR Studio 6.2 & AVR Dragon
The Atmel solution builds the bootloader.  It has access to the source files used to build the bootloader itself.   The bootloader code receives data to loade the...
Tuesday, 17 March 2015 - 23:44
Sharing bootload functions with application code--Can optimization bite you?
I have some bootloader code that I decided  to try to shrink by eliminating some  "dead code".  It was effectively "dead" since the associated functions were never...
Saturday, 20 September 2014 - 13:02
DebugWire/Dragon Wierdness
Not a question, but thought others might be interested...   I've always had difficulty getting into and out of debugWire in AS6.1 with my Dragon.  Maybe that's pretty...
Friday, 12 September 2014 - 18:29
Debugging Bootloader Code on Atmega328P with AS 6.1 and Dragon
Trying again (fourth time) to start discussion.  If this works, I'll reply to post the real content.
Tuesday, 9 September 2014 - 23:08
Debugging Bootloader Code on Atmega328P with AS 6.1 and Dragon
I have a custom bootloader that I want to debug with the Dragon tool in AS 6.1.   I have these linker flags:   -Wl,--section-start=.text=0x3800 The 2048_3800 fuse is...
Monday, 8 September 2014 - 22:24
AVR231 Bootloader without UART (wireless)
I want to use the AV231 bootloader (version ported to gcc), except send the data over a wireless interface (Nordic NRF24L01) instead of a UART. Instead of sending data one byte at...
Thursday, 28 August 2014 - 14:59
Studio 4 Conversion to Studio 6.1.2730 -- Size inconsistency
I'm trying to chase a bug in a new project started using Studio 4. Same external Makefile I've used in several projects--it includes a target for invoking avr-size (makefile...
Monday, 24 March 2014 - 13:06
Timer ISR firing during debugWire Flash load
When I Debug->Restart or Debug->Start without Debugging it takes a long time for the code to load. It will get to something like 20%, do nothing for 5 or 10 seconds, then to 50%...
Sunday, 2 February 2014 - 20:19

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