hi, I have problem with ATmega328p USART(reading message on PC terminal sent by atmega328p). Followings are diagnostics.
- works with 11.0592MHz external crystal oscillator
- works with 8MHz internal RC oscillator
- code works as evident from working successfully with 11.0592MHz and 8MHz int. osc test
- no problem in terminal baud rate and other settings
- no problem with UBRR value(taken from datasheet)
But,
- does not work with 16MHz and 4MHz external crystal oscillator
Also, I am using USB to TTL converter.
What else besides above can i look for and do to test?
thanks