/media/sandbox/xtools/avr-dev/build/avr/bin/avr-gcc -g -Wall -O2 -mmcu=at90pwm2    -c -o main.o main.c
main.c: In function `ioinit':
main.c:122: error: `TWBR' undeclared (first use in this function)
main.c:122: error: (Each undeclared identifier is reported only once
main.c:122: error: for each function it appears in.)
main.c: In function `ee24xx_read_bytes':
main.c:177: error: `TWCR' undeclared (first use in this function)
main.c:177: error: `TWINT' undeclared (first use in this function)
main.c:177: error: `TWSTA' undeclared (first use in this function)
main.c:177: error: `TWEN' undeclared (first use in this function)
main.c:179: error: `TWSR' undeclared (first use in this function)
main.c:179: error: `TWS7' undeclared (first use in this function)
main.c:179: error: `TWS6' undeclared (first use in this function)
main.c:179: error: `TWS5' undeclared (first use in this function)
main.c:179: error: `TWS4' undeclared (first use in this function)
main.c:179: error: `TWS3' undeclared (first use in this function)
main.c:195: error: `TWDR' undeclared (first use in this function)
main.c:270: error: `TWEA' undeclared (first use in this function)
main.c:294: error: `TWSTO' undeclared (first use in this function)
main.c: In function `ee24xx_write_page':
main.c:344: error: `TWCR' undeclared (first use in this function)
main.c:344: error: `TWINT' undeclared (first use in this function)
main.c:344: error: `TWSTA' undeclared (first use in this function)
main.c:344: error: `TWEN' undeclared (first use in this function)
main.c:346: error: `TWSR' undeclared (first use in this function)
main.c:346: error: `TWS7' undeclared (first use in this function)
main.c:346: error: `TWS6' undeclared (first use in this function)
main.c:346: error: `TWS5' undeclared (first use in this function)
main.c:346: error: `TWS4' undeclared (first use in this function)
main.c:346: error: `TWS3' undeclared (first use in this function)
main.c:361: error: `TWDR' undeclared (first use in this function)
main.c:416: error: `TWSTO' undeclared (first use in this function)
main.c: At top level:
main.c:468: warning: return type of 'main' is not `int'
main.c: In function `main':
main.c:476: warning: passing arg 1 of `fdevopen' from incompatible pointer type
main.c:476: error: too many arguments to function `fdevopen'
make: *** [main.o] Error 1