I have a couple of questions that hopefully someone can answer…
Is the serial port on a laptop 'typically ’ working at TTL levels (0-5v) or at -5v to +5v? I am wondering if I need a Max232 to change levels…
I have some sample code for setting up the UART on ATmega48 devices it includes a formula for calculating UBRR given a Baud rate and a oscillator frequency.
#define MYUBRR (FOSC/16/BAUD-1)
Is FOSC 20Mhz on the Baby Orangutan?
I have connected the Baby Orangutan to my laptop serial port and I am getting a steady stream of the wrong characters so I am trying to find out if my baud rate is set wrong or if the levels are wrong.
Thanks // M