AT644 and At644P - uploading problems [SOLVED] I have no problems with uploading bootloader and firmware using USBasp and Atmega 644p (via arduino). When I put Atmega 644 into dip40 socket on my board - arduino have problems with upload bootloader. why? On my USBasp i close jumper slow-sck (bascom avr read this atmega 644 without problems) [SOLVED] edit: -------------------- need to set FuseBits via external program. Factory settings for Atmega: internal oscilator 1Mhz, JITAG enabled, CKDIV8 enabled. Set to: external oscilator >8MHz, JITAG off, uncheck CKDIV8 644 or 644P - Sprinter's firmware is set for Atmega 644P. If U have Atmega 644 - need to change pins.h file and boards.txt https://reprap.org/forum/read.php?158,120418,120418#msg-120418 Tue, 14 Apr 2026 11:42:11 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?158,120418,127211#msg-127211 Re: AT644 and At644P - uploading problems [SOLVED] https://reprap.org/forum/read.php?158,120418,127211#msg-127211 I have problem when I try to upload Sprinter to my Atmega 644. Could you tell me precisely how to change pins.h file and boards.txt]]> Michał Sanguino(lolu) Tue, 03 Apr 2012 17:16:19 -0400 https://reprap.org/forum/read.php?158,120418,120418#msg-120418 AT644 and At644P - uploading problems [SOLVED] https://reprap.org/forum/read.php?158,120418,120418#msg-120418
[SOLVED] edit:
--------------------
need to set FuseBits via external program.
Factory settings for Atmega: internal oscilator 1Mhz, JITAG enabled, CKDIV8 enabled.
Set to: external oscilator >8MHz, JITAG off, uncheck CKDIV8
644 or 644P - Sprinter's firmware is set for Atmega 644P. If U have Atmega 644 - need to change pins.h file and boards.txt]]> codec Sanguino(lolu) Thu, 23 Feb 2012 06:01:46 -0500