Attiny841 DSC error?

Hi!

I've started a new project with Attiny841. First it gave some errors like "dsc-file error adding: USR1". I've find a corrected DSC file here in another topic (tiny841). The first errors are gone, but other newer ones come after ar included SerPort and SerPort2 to the project. And even newer ones when I set the fuse bits. I tried to cerrect the dsc file. First it seemed to be a success - the program compiled without errors. But unfortunately I can't program the processors. At first try a Flash verify error at 0000 error came and after it always a Wrong Device-ID: 000000... I tried to replace the processor, but the result is the same, first Flash verify error, then wrong device id. (My compiler's version is 5.05.04) What could be the error? Do you have a newer correct dsc file for attiny841? I've attached my modified dsc file. Can you please check it? Maybe I made some error there...

Thanks in advance

Sandor Wortmann

Hi Gunter,

Thanks for your quick reply!
You are right, it was my fault, I've set the CKSEL fuses wrongly, and forget to set the programmer clock to 1Mhz. Now I can program the processor.
A simple program which only blinks an LED works correctly. But when I include Serport and try to use ser_enable, serstat, serinp the program hangs even when absulutely no data arrves to the processor. Could you please check the dsc files I sent, because I have to changed some serial related parameters (USART interrupt vectors) in it in order to be able to compile the code without errors, and I am not sore I do it in the proper way.

Sandor

Hello Rolf,

I am afraid that you are wrong, Attiny841 (and 441 also) has "Two Full Duplex USARTs with Start Frame Detection", so I think it should be working if everything in its palce.
Meanwhile I removed the SerPorts from my code and write a little serial receive rutine myself. It working (with interrupt), so I think there should be some problem with the code that AVRco generates for this type of microcontroller.

Best regards,

Sandor

Hello Sandor,

now I fixed the problems in the TINY841 DSC file.

rolf