I'm stepping into Arduino world and decided to build a small board to implement a gamepad. Prior designing the board I tested my firmware on a Arduino Pro Micro USB so I decided to make something similar. My board use an ATMEGA32U4-AU instead ATMEGA32U4-MU because it's simpler to solder. Connecting the board to my PC I noticed a new device named ATmega32U4 appear between Windows devices this sounds like the board is working. Now the problem is how to program it with the correct bootloader (?) and make it a real Arduino board. I found some spurious articles about how to make it but I have not a clean idea. Someone can help me? I can share everything you need to focus on the board.
UPDATE ---------------------------------------------------------------------
Before installing Arduino bootloader I tried programming a sample firmware on the board trough Atmel FLIP (successfully). After that I never been able to program the board again (neither trough FLIP or other means)
I connected my board to Arduino ISP and since Windows seems unable to find the correct driver I had to install it manually, after that I tried to install the bootloader trough Install bootloader option of Arduino IDE (selecting Arduino ISP as programmer) but I had no success: This's the log:
avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Users\tux\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : usb
Using Programmer : arduinoisp
avrdude: usbdev_open(): Found USBtinyISP, bus:device: bus-0:\\.\libusb0-0001--0x2341-0x0049
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 : USBtiny
Description : Arduino ISP Programmer
avrdude: programmer operation not supported
avrdude: Using SCK period of 10 usec
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.
avrdude done. Thank you.
Error during bootloader writing.
I can clearly see that my firmware is not running when I start the booloader process (probably because it reset the board). From the log it seems that everything is going correctly until: programmer operation not supported
What does it means? Is the programmer unable to program such chip? How can I fix this? If I reset my board prior trying to burn again a new firmware over it will it work or I just have to put a brand new micro on it?
Best regards, Mike
