Serial Loopback with ATMega328p-pu

[hexagon5un]

Serial Loopback with ATMega328p-pu

[tenderlove]

Just to be specific, I am able to get the chip to echo characters back to me, I just have to set the baud on my local client to 3600 for the characters to be correct. It doesn't matter what baud I set in the Makefile, it's always 3600 on my client. I've verified it's actually recompiling the code and reflashing the chip. I've also tried changing the fuses. If I manually define USE_2X in my source, it does impact the speed, it's just stuck at 19200 rather than 3600.

[tenderlove]

I've ended up setting F_CPU= 8000000UL and setting LFUSE = 0xE2 to disable the clock divider. This let me use 19200 for the baud without manually defining USE_2X. However, it doesn't seem to matter what I set BAUD to, I always get 19200 speeds.