Added more supports for flashing the atmega32u4 keyboard control chip, for hardware newbies like me
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Karl Semich
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commit
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@ -1,5 +1,81 @@
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Factory default firmware. Burn it with AVR-ISP500(-TINY) using avrdude and command:
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```bash
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avrdude -V -pm32u4 -cstk500v2 -P/dev/ttyACM0 -U flash:w:keyboard.hex:a -U hfuse:w:0xD8:m -U efuse:w:0xC7:m -U lock:w:0xCF:m
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avrdude -p m32u4 -c stk500v2 -P /dev/ttyACM0 -U flash:w:keyboard.hex:a -U hfuse:w:0xD8:m -U efuse:w:0xC7:m -U lock:w:0xCF:m
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```
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or any ATmega32U4-compatible programmer tool and software.
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An additional 2x3 male-male header is needed in order to connect the programmer
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to the board. It connects to the keyboard controller board, where the AVR chip
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is, not the keyboard itself nor the mainboard. If the board is programmed
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in-system, cut off the excess pin length that sticks out underneath the board
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from the 2x3 header, so that soldered header pins do not press the board higher
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than its intended mounting height, potentially damaging it if screwed in place.
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Place a couple layers of tape under the pins to prevent the metal keyboard
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housing from shorting them, which prevents the board from responding.
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Note that the keyboard controller board may need to be externally powered in
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order to write successfully, It seems sufficient to plug it into a fully
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powered running mainboard. When working under the system with the battery and
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touchpad below the keyboard controller board, the cable for the AVR-ISP500
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should be heading off to your left from the 2x3 header it plugs in to, if
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oriented correctly.
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The keyboard control board has pin labels on the underside. From above, when
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working with the system upside down and the keyboard below the viewer, they
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would be:
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GND 6 o o 5 RST
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==== cable to programmer ==== MOSI 4 o o 3 SCK
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VDD 2 o o 1 MISO
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The pinout from the AVR-ISP500, looking into the female 2x3 plug with the cable heading to the right, is:
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RST 5 o o 6 GND
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SCK 3 o o 4 MOSI ==== cable to programmer ====
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MISO 1 o o 2 VDD
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Explanation of avrdude options, from the avrdude man page:
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`-V`: skip verify step
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`-p m32u4`: specifies the chip on the board
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`-c stk500v2`: specifies the programmer used
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`-P /dev/ttyACM0`: specifies the serial device to find the programmer
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`-U flash:w:keyboard.hex:a`: [w]rites keyboard.hex to the flash ROM of the device, [a]utodetecting format
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`-U hfuse:w:0xD8:m`: [w]rites the im[m]ediate value 0xD8 to the high fuse byte
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`-U efuse:w:0xC7:m`: [w]rites the im[m]ediate value 0xC7 to the extended fuse byte
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`-U lock:w:0xCF:m`: [w]rites the im[m]ediate value 0xCF to the lock byte
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Other useful -U options: [r]ead to retrieve data from the chip, [r]aw format for binary, [i]ntel format for hex
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The list of the avrdude m32u4 memory types can be found from the avrdude `part` command in terminal (`-t`) mode:
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```
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AVR Part : ATmega32U4
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Chip Erase delay : 9000 us
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PAGEL : PD7
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BS2 : PA0
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RESET disposition : dedicated
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RETRY pulse : SCK
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serial program mode : yes
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parallel program mode : yes
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Timeout : 200
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StabDelay : 100
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CmdexeDelay : 25
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SyncLoops : 32
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ByteDelay : 0
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PollIndex : 3
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PollValue : 0x53
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Memory Detail :
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Block Poll Page Polled
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Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
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----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
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eeprom 65 20 4 0 no 1024 4 0 9000 9000 0x00 0x00
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flash 65 6 128 0 yes 32768 128 256 4500 4500 0x00 0x00
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lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
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signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
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```
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28
SOFTWARE/A64-TERES/TERES-KBD-RELEASE/Keyboard_firmware/dumpall
Executable file
28
SOFTWARE/A64-TERES/TERES-KBD-RELEASE/Keyboard_firmware/dumpall
Executable file
@ -0,0 +1,28 @@
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#!/usr/bin/env bash
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# This script dumps the entire contents of all the memory types from the chip into a dated subfolder.
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dir="$(date --iso=minutes)".dump
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PORT=/dev/ttyACM0
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PROGRAMMER=stk500v2
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CHIP=m32u4
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AVRDUDE="avrdude -p $CHIP -c $PROGRAMMER -P $PORT"
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# test connection
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$AVRDUDE -U signature:r:/dev/stderr:i || exit 1
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# dump
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mkdir "$dir"
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cd "$dir"
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$AVRDUDE -n $(
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# output memtype dumping parameters
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for memtype in $(
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# output memtypes
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echo part |
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$AVRDUDE -t -n |
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sed -ne 's/^ \([a-z]*\).*/\1/p'
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)
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do
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echo -U ${memtype}:r:${memtype}.raw:r
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done
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)
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2
SOFTWARE/A64-TERES/TERES-KBD-RELEASE/Keyboard_firmware/flashit
Normal file → Executable file
2
SOFTWARE/A64-TERES/TERES-KBD-RELEASE/Keyboard_firmware/flashit
Normal file → Executable file
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avrdude -V -pm32u4 -cstk500v2 -P/dev/ttyACM0 -U flash:w:keyboard.hex:a -U hfuse:w:0xD8:m -U efuse:w:0xC7:m -U lock:w:0xCF:m
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avrdude -V -p m32u4 -c stk500v2 -P /dev/ttyACM0 -U flash:w:keyboard.hex:a -U hfuse:w:0xD8:m -U efuse:w:0xC7:m -U lock:w:0xCF:m
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