Required Software
================= 
  -avr-gcc
  -avr-libc
  -binutils-avr
  -avrdude
  
The toolchain must be a fairly recent version in order to support the Atmega88PB.
I'm using packages from debian sid with the following versions:
  -gcc-avr 4.8.1+Atmel3.4.5-1
  -binutils-avr 2.24+Atmel3.4.5-1
  -avrdude 6.0.1-1

Unfortunately, even the most recent version of avr-libc in debian (1.8.0+Atmel3.4.5-1
at the moment) doesn't have complete support for the Atmega88pb: the vector for the
UART start bit interrupt isn't present. To get around this issue, avr-libc most be
modified and re-built from scratch.

To fix avr-libc, add the following block at line 753 of include/avr/iom88pb.h:
/* USART Rx Start */
#define USART_START_vect            _VECTOR(26)
#define USART_START_vect_num        26

And change line 754 to read:
#define _VECTORS_SIZE 54

A modified version of avr-libc is present in the "../avr-libc rebuild/" directory.


Avrdude must be modified slightly to add support for the mega88PB.
Add the following section to /etc/avrdude.conf just after the section for the atmega88:
part parent "m88"
    id               = "m88pb";
    desc             = "ATmega88PB";
    signature        = 0x1e 0x93 0x16;

    ocdrev              = 1;
  ;