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thomasonw / ATmegaxxM1-C1

Arduino IDE support files for CAN enabled Atmel AVR chips: ATmega64M1, ATmega32M1, ...
GNU Lesser General Public License v2.1
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Board clock mismatch #3

Closed scozzarro closed 6 years ago

scozzarro commented 6 years ago

Dear thomasonw I'm encountering some problem with the clock of the board using your code. I noticed it because the serial comunication wich I set to 9600 instead is actualy at 600. My board has a 16MHz xtal and I'm using the right bootlader version ATmega64M1 (16MHz - xtal - Arduino). Can you tell me more about it ? Many thanks.

thomasonw commented 6 years ago

@scozzarro : Interesting, I have been using the Serial port with no problems, though it is behind an FT232 chip which could be masking things. In a few days I will take a scope to the actual Serial signal and confirm the baud rates. FWIW, I am using 115,200, and 57,500 is the rate used by the bootloader - that though is done via a soft serial, not using the hardware UART.

I am assuming you are using the bootloader as well as the Arduino libs from this repository, there was a LOT or work around the Serial port to get it to work - and work reliably.

Will let you know what I find and we can see if we can get to the bottom of the issue you are having.

thomasonw commented 6 years ago

@scozzarro Hello. Just not I looked at Tx serial transmissions from the ATMega64M1 running at '115,200' baud, and the frequency looks correct to me. (I measured 8.520uS per bit). I am wondering what is happening in your case!