Hello Geekhack members,
Given my background in electronics and having access to components and other tools, I went ahead and printed several GH60 PCB's using the gerber files available on GitHub. The new boards look amazing. I populated 3 PCB's so far with a brand new ATMega32U4 along with all the Crystal, SMD Caps and Resistors. I also installed the reset button and it's pull up resistor. Per schematics, I installed a 6 pin headers on P1-P6. I
am able to use AVRDude to flash the chip various hex files without any issues. I even experimented with flashing the bootloader with the Caterna boot loader used by the Pro Micro with the Arduino IDE. Flashing is always successful. However, when I plug the keyboard to the PC, it does not get detected by the computer and it never shows up on any COM port. I used the ATMega32U4 in many projects in the past, it is pretty easy to get it going. I am not sure what am I doing wrong.
Using an ISP, here is the avrdude output:
avrdude -C<path to conf>avrdude.conf -v -patmega32u4 -carduino -PCOM3 -b19200 -Uflash:w:<path to hex file>gh60_default.hex:i -Ulock:w:0x2F:m
avrdude: Version 6.3-20171130
Copyright (c) 2000-2005 Brian Dean,
http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "<path to conf>avrdude.conf"
Using Port : COM3
Using Programmer : arduino
Overriding Baud Rate : 19200
AVR Part : ATmega32U4
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 9000 9000 0x00 0x00
flash 65 6 128 0 yes 32768 128 256 4500 4500 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Arduino
Description : Arduino
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x1e9587 (probably m32u4)
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as D8
avrdude: safemode: efuse reads as CB
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "<path to hex>\gh60_default.hex"
avrdude: writing flash (16978 bytes):
Writing | ################################################## | 100% 19.99s
avrdude: 16978 bytes of flash written
avrdude: verifying flash memory against <path to hex>\gh60_default.hex:
avrdude: load data flash data from input file <path to hex>\gh60_default.hex:
avrdude: input file <path to hex>\gh60_default.hex contains 16978 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 11.74s
avrdude: verifying ...
avrdude: 16978 bytes of flash verified
avrdude: reading input file "0x2F"
avrdude: writing lock (1 bytes):
Writing | ################################################## | 100% 0.04s
avrdude: 1 bytes of lock written
avrdude: verifying lock memory against 0x2F:
avrdude: load data lock data from input file 0x2F:
avrdude: input file 0x2F contains 1 bytes
avrdude: reading on-chip lock data:
Reading | ################################################## | 100% 0.02s
avrdude: verifying ...
avrdude: 1 bytes of lock verified
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as D8
avrdude: safemode: efuse reads as CB
avrdude: safemode: Fuses OK (E:CB, H:D8, L:FF)
avrdude done. Thank you.