Doc64 #21 | Commodore C64 | Repair SD2IEC - Solder SMD Device & flash ATMega 1284P controller

Today I want to show you ...
- How to repair your SD2IEC with a broken Atmel ATMega 1284P controller
- Hot to solder a SMD SMT device (ATMega 1284P / ATMega 644 or similar) onto your SD2IEC PCB
- How to solder a TQFP-44 SMD device
- How to flash a ATMega controller / microcontroller for your SD2IEC
- How to flash a ATMega controllerwith Atmel Studio 7
- How to flash a ATMega controller with AVRdude
- Which fuse-bytes (fuse-bits) / fusebyte (fusebit) you need to use
- Which SD2IEC firmware you need to flash (LarsP, Shadowwolf)
Usefull links
AVRdude download:
http://stefanfrings.de/avr_tools/

Atmel Studio 7 download:
https://www.microchip.com/mplab/avr-support/atmel-studio-7

FuseByte calculator:
http://eleccelerator.com/fusecalc/fusecalc.php?chip=atmega1284p

SD2IEC firmware:
https://www.sd2iec.de/

ISP-Programmer I used:
https://www.diamex.de/dxshop/USB-ISP-Programmer-fuer-Atmel-AVR-Rev2
Schematic, Layout, Gerber-Files for download (as example):
https://easyeda.com/wagiminator/y-c64-sd2iec-smd_copy
avrdude commands (Programmer: DIAMEX USB-ISP Programmer V2):

avrdude -c c
Lists all from avrdude supported programmers

avrdude -c stk500v2 -P com4
Lists all from device 'stk500v2' supported controllers

avrdude -c stk500v2 -P com4 -p m1284p
Use stk500v2 driver (programmer), COM-Port 4 (see in the windows 10 hardware manager -Serial USB-Device)
with controller m1284p (ATmega 1284P)

avrdude -c stk500v2 -P com4 -p m1284p -U lfuse:w:0xEF:m
Writes the low fuse byte (here EF hex) into the controller

avrdude -c stk500v2 -P com4 -p m1284p -U hfuse:w:0x92:m
Writes the low fuse byte (here 92 hex) into the controller

avrdude -c stk500v2 -P com4 -p m1284p -U efuse:w:0xFF:m
Writes the extended fuse byte (FF hex) into the controller

avrdude -c stk500v2 -P com4 -p m1284p -U lock:w:0xFF:m
Writes the lock byte (here FF hex = no locks) into the controller

copy the xxxlarsp_1284p_xxx.hex to the AVRDUDE directory
avrdude -c stk500v2 -P com4 -p m1284p -u -U flash:w:xxxlarsp_1284p_xxx.hex
Flashes the xxx.hex file onto the controller (here ATmega 1284P)
Music by:
- Shades, 1986, 64er Markt&Technik by Chris_Huelsbeck

Видео Doc64 #21 | Commodore C64 | Repair SD2IEC - Solder SMD Device & flash ATMega 1284P controller канала Doktor64