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Simulator hooks?
Does the AS AVR Simulator (or any other AVR simulator, for that matter) provide any mechanism where a user-written host program can examine the chip state when a breakpoint is hit...
Friday, 25 January 2019 - 23:54
Low power sleep modes on SAMD21, SAMD51...
I am pretty confused about the interactions of the various pieces involved in low-power modes of the SAMD processors. There's the WFI instruction of the ARM. There's the SCR (...
Saturday, 12 January 2019 - 01:39
CMSIS .svd files...
I sort-of thought that the .h files included in studio were automatically generated from the ARM-standardized CMSIS ".svd" files. But in fooling around with parsing the .svd files...
Friday, 14 December 2018 - 10:10
Running Arduino code on an ATmega4809 Xplained-Pro board...
I'm not really that interested in WiFi, so I figured I'd see if I could get the new "Arduino WiFi v2" (which uses the ATmega4809, and mEDBG chip, and an ESP32 module, plus some...
Tuesday, 11 December 2018 - 11:25
avr-gcc optimization of xor incorrectly eliminates volatile access!
Has anyone else seen this?  Any ideas?   avr-gcc (AVR_8_bit_GNU_Toolchain_3.6.1_495) 5.4.0   #include <avr/io.h> int aRead() { uint8_t h,l; l = ADCL...
Tuesday, 27 November 2018 - 02:35
RSTPINCFG (enable RESET functionality) on ATmega4809 can interfere with UPDI?
So I wanted to make the RESET button on my ATmega4809 Xplained Pro actually reset the CPU (not the default, apparently), and went into the Device Programming Panel of AS7, to set...
Monday, 26 November 2018 - 04:04
Knowing compile-time options within source code?
Is there a way to tell which compiler options have been specified on the command line, so as to take appropriate action or issue warnings?   I'm interested in know whether "-...
Monday, 5 November 2018 - 03:10
MPLABX first users
Split form here JS https://www.avrfreaks.net/commen...   Copy of a message I sent off to AVRSupport@microchip (as they request for people trying to use MPLAB for AVR):...
Monday, 8 October 2018 - 10:08
avr-gcc weird (non)optimization
This is avr-gcc (AVR_8_bit_GNU_Toolchain_3.6.1_495) 5.4.0 Edit: It's an ATmega4809, with those new-fangled structure-based IO register definitions.   Supposed I am "somehow"...
Monday, 8 October 2018 - 00:53
Optiboot version 8.0 release
Optiboot version 8 is available. The major points relevant to Arduino users include: Cleanup of the MCUSR (reset reason) behavior. Ability to jump to the bootloader "as a service...
Tuesday, 25 September 2018 - 00:31
Weird optimization failure (SAMD21 CM0 gcc)
arm gcc (the version in the Arudino package; relatively recent)   // the pin is not an output, disable pull-up if val is LOW, otherwise enable pull-up volatile...
Tuesday, 4 September 2018 - 05:57
avr-gcc optimization of call-used registers...
Call-used registers (r18-r27, r30-r31): May be allocated by gcc for local data. You may use them freely in assembler subroutines. Calling C subroutines can clobber any of them -...
Thursday, 9 August 2018 - 00:45

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