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@@ -115,3 +115,57 @@ build Crescendo for an attiny25-based driver and then flash it: ../../bin/flash-tiny25.sh crescendo.hex Other useful tools are in bin/ too, so they might be worth a look. + + +ATtiny Series 1 (tiny1616) Support +================================== + +As of early 2021, the Debian packages for gcc-avr and avrdude do not include +support for the Tiny1 series chips. Extra steps are required to get these +working. + + - Download the Atmel ATtiny Series Device Support pack: + http://packs.download.atmel.com/ + + - Unzip the pack somewhere on your build computer + + - Set ATTINY_DFP=/path/to/where/you/unzipped/the/pack + (either in your shell, or in this repo's bin/build.sh script) + + export ATTINY_DFP=$HOME/src/torches/atmel/attiny-dfp + + - Make sure you're using gcc-avr 1:5.4.0+Atmel3.6.2 or newer. + 3.6.1 will not work. It gives errors like: + /usr/lib/gcc/avr/5.4.0/../../../avr/bin/ld: address 0x80381e of anduril.elf section `.data' is not within region `data' + This requires debian/bullseye or newer; buster has 3.6.1. + +This should at least allow the code to compile. + +Some extra steps are also needed to make flashing (avrdude) work: + + - Get an AVR jtag2 device. + The one I'm using is: "HWAYEH AVR JTAG ICE Version 2.0" + Connect the cables: + - GND = - + - Vtref = + + - nSRST = R (reset/UPDI) + + - Flash the jtag2 device with the relevant firmware: + https://github.com/ElTangas/jtag2updi/tree/master/tools/avrjtagicev2 + + - Get an avrdude.conf which supports jtag2updi: + + - Download avrdude.conf from https://github.com/ElTangas/jtag2updi + and put it in /etc + + - Or grab the source and set an environment variable: + + cd ~/src/torches/avrdude + git clone https://github.com/ElTangas/jtag2updi + export AVRDUDE_CONF="-C$HOME/src/torches/avrdude/jtag2updi/avrdude.conf" + + - Maybe configure which USB serial port to use too: + export AVRDUDE_TTYUSB="/dev/ttyUSB2" + +Afterward, flashing should work. You may need to unplug and replug the jtag2 +USB device between uses though, since it may stop responding after each use. |