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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...
Tue. Nov 14, 2017 - 10:45 PM
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...
Thu. Oct 19, 2017 - 03:40 PM
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....
Thu. Jun 11, 2015 - 09:18 AM
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. ...
Tue. May 26, 2015 - 03:41 PM
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...
Sat. Apr 25, 2015 - 11:02 PM
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...
Sat. Sep 27, 2014 - 03:43 PM
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...
Fri. Sep 19, 2014 - 03:23 PM
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) {...
Sun. Apr 13, 2014 - 10:28 AM
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 "...
Tue. Dec 10, 2013 - 03:40 PM
TFT Colour LCD controllers with SPI interface
I have been playing with a very nice 320x240 display on an Arduino shield. It uses a ILI9320 controller and its 8-bit interface. Other displays use 16-bit i/f have a 20x2 pin...
Tue. Mar 12, 2013 - 02:32 PM
ENC28J60 Web server from SD Card
I have got a web server running quite successfully with a Wiznet W5100 Ethernet chip. It serves files with long filenames on a FAT16 microSD memory card. I thought that I should...
Sat. Dec 8, 2012 - 11:54 PM
Populating Dataflash on Xmega128-A1-Xplained board
The new Xplained board is unpopulated, but has pads for AT45DB or AT25DF chips. As far as I can see AT45DB chips are only in leadless packages. The AT25DF come in SOIC-8. There...
Wed. Jul 25, 2012 - 02:50 PM

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