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avrdudes / avr-libc

The AVR-LibC package provides a subset of the standard C library for AVR 8-bit RISC microcontrollers.
https://avrdudes.github.io/avr-libc/
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Some parts don't define signature bytes #878

Open stefanrueger opened 2 years ago

stefanrueger commented 2 years ago

The following mcus don't seem to define signature bytes.

  at43usb320
  at43usb355
  at76c711
  at90c8534
  at90pwm1
  at90pwm2
  at90pwm3
  at90s2333
  at90usb82
  at94k
  atmega32hvbrevb
  atmega8hva
  m3000

Some of these can be sourced as follows:

  at90pwm1   => [0x1E, 0x93, 0x83], # [1]
  at90pwm2   => [0x1E, 0x93, 0x81], # /usr/local/etc/avrdude.conf 9935     
  at90pwm3   => [0x1E, 0x93, 0x81], # /usr/local/etc/avrdude.conf 10118   
  at90s2333  => [0x1E, 0x91, 0x05], # /usr/local/etc/avrdude.conf 2331     
  at90usb82  => [0x1E, 0x93, 0x82], # /usr/local/etc/avrdude.conf 13273
  atmega8hva => [0x1E, 0x93, 0x10], # [2]

[1] Datasheet AT90PWM1 [2] Datasheet ATmega8HVA

stefanrueger commented 2 years ago

And, also 

atmega32hvbrevb => [0x1E, 0x94, 0x0D], # [1]
atmega8hva      => [0x1E, 0x93, 0x10], # [1] in correspondence with the data sheet

[1] from Atmel-Studio's .atdf file in the corresponding DFP pack

It's possible (likely?) that the iom file for parts with missing signatures have other deficiencies, too. For example, the ATmega32HVBrevB has SPM_PAGESIZE defined as 64, but the .atdf file file thinks it's 128. And gcc-avr ought to #define __AVR_ATmega32HVBrevB__ rather than __AVR_ATmega32HVBREVB__.