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Noisy Laptop Power Supply.
My 12-year old Laptop power supply was replaced several years ago with an unbranded 19.5V / 4.74A from Ebay with 5.5mm/2.5mm barrel jack. The PC works fine with this PSU.  ...
Sunday, 1 September 2019 - 14:32
Uploading code to new Arduino NANO-EVERY
I can build and upload sketches to the new NANO-EVERY board via the Arduino IDE.   It looks as if the IDE uses avrdude to program mega4809 chip via the SAMD11 USB-Serial chip...
Sunday, 30 June 2019 - 16:46
Re-formatting an unrecognised SD card
I have several microSD cards that have been corrupted.   (probably by me) They are not recognised as disks.   I don't care about losing the data.   I...
Tuesday, 14 May 2019 - 16:09
Compile time far data address in Mega2560 with G++
The linker attempts to place data in the first 64kB of a big AVR and the code at higher addresses. In practice,  you have 200kB of data with 30kB code.   So most...
Tuesday, 14 November 2017 - 22:45
Controlling .NOLIST in Avrasm2 projects
In AS4 you simply .INCLUDE the relevant xxxDEF.INC header file for your target AVR You have full control of .NOLIST and .LIST when producing the .LST file for your project. A...
Thursday, 19 October 2017 - 15:40
Split from: Electrical Characteristics of ICP1
Likewise,    I would not expect any corruption of the input signal.     Please can you post the minimal code that exhibits his behaviour....
Thursday, 11 June 2015 - 09:18
Used microSD cards have errors
Oh,   I love this Forum software.    Get half-way through writing a message and it disappears.   I bought some Used microSD cards from Ebay. ...
Tuesday, 26 May 2015 - 15:41
Arduino Zero Pro malloc() in ARM libc.a
I was trying to get <SD.h> library to work on my Zero Pro with Arduino v1.7.2 Instead of new the File.cpp uses malloc() and free().   This works fine in the AVR libc.a...
Saturday, 25 April 2015 - 23:02
Readable Listings from avr-as (GNU)
I was playing with ralphd's bootloader which uses avr-gcc.   After the irritation of byte-arithmetic for a word-addressed AVR,   I moved to the Atmel Assembler. Now...
Saturday, 27 September 2014 - 15:43
Enabling OC1B output on a Tiny85.
With regular Mega or Tinys,   you just make DDRx.y an output for an OCnx pin,   and set the COMnxy bits for your specific output mode.   OC1A and OC0A...
Friday, 19 September 2014 - 15:23
Reading Pixels from GRAM memory in ILI9341 and ILI9325
I composed this reply to a question from "lekter" that was deleted while I was typing: So I thought that I will post it myself. uint16_t readPixel(int16_t x, int16_t y) {...
Sunday, 13 April 2014 - 10:28
ATtiny2313A, ATtiny4313 and RSIG in SPMCSR
The old tiny2313 could read fuse and lockbits but not Signature/Calibration bytes. When the tiny4313 came out, RSIG is shown in the "24. Register Summary" in the shared "...
Tuesday, 10 December 2013 - 15:40

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