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CMSIS incomplete?
I was poking around in the directories of the arm CMSIS "pack" that Atmel Studio installs, and it looks to me like "C:\Program Files (x86)\Atmel\Studio\7.0\packs\arm\cmsis\5.4.0\...
Sunday, 28 June 2020 - 09:10
resident self-hosted debugger for Cortex-M ?
Is there a resident (or "self-hosted") debugger that runs on Cortex-M CPUs?   Something that could reside in flash, and works like CP/M's DDT or MSDOS "debug"? Is such a...
Sunday, 21 June 2020 - 23:46
What causes __do_copy_data to be linked into an executable?
Over in arduinoland, a user was having trouble with an "all assembly" BLINK example. Apparently, this was because variables defined in the .S file ".data" segment were not getting...
Monday, 15 June 2020 - 08:35
RTC and not resetting its clock during RESET
The RTC peripheral of most Atmel SAMD products does not get automatically reset expect a power-on reset.  This is clearly documented. The clock of RTC is likewise not reset,...
Sunday, 7 June 2020 - 22:45
Compile-time object construction in C++
Suppose that I have an object like a "command", which gets put together into a linked list, with each "object" containing a text string, a function pointer to the action routine...
Saturday, 25 April 2020 - 05:22
Getting info about chip memory layout...
Is there a way to get information out of a .elf file, or out of gld, about the size of sections that exist AND the maximum size that they could be? I know that "avr-size" will...
Saturday, 18 April 2020 - 00:15
Possible compiler bug (avr-gcc 7.3 (Arduino)) WRT switch/case jump tables
So have any of you daring folk using avr-gcc past the Microchip released version seen problems? The latest Arduino (1.8.10) is using their own build of avr-gcc 7.3.0, and while I...
Saturday, 7 March 2020 - 09:23
changing the default editor in AS7
Somehow I seem to have changed the default editor for .C files in AS7 to be EMACS instead of the internal editor. That was sort-of nice when I was entering code, but it's turning...
Thursday, 5 March 2020 - 22:40
C, C++, and __flash/PROGMEM
C++ folk have notoriously (?) fused to implement the "named address spaces" that are in recent versions of avr-gcc, and make using PROGMEM somewhat more pleasant, using "__flash...
Wednesday, 8 January 2020 - 10:18
[Solved] Xplained Pro UART (EDBG) data transparency issues with Macintosh?
For my next "why me" question... I'm working on a version of the Optiboot (Arduino) bootloader for the Tiny0, tiny1, and mega0 chips. Things are going reasonably well; the new NVM...
Sunday, 6 October 2019 - 22:08
Trivial use of the CCL...
Just checking: Can you use the CCL "trivially" just to move a peripheral function to a pin where you couldn't otherwise direct it? For example, on the ATmega4809, USART0 TXD can...
Wednesday, 18 September 2019 - 10:14
Makefile question...
So, when I took over the Optiboot project, I inherited a makefile structure that includes rules like: atmega168: TARGET = atmega168 atmega168: MCU_TARGET = atmega168 atmega168:...
Wednesday, 11 September 2019 - 22:42

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