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Problems with serial communication

I have implemented a new serial data transfer protocol in our 8051 system (80C552).

I tryed to write the received characters immediately back to the terminal with the following commands:

	ucrs232_buffer[ucrec_count] = S0BUF;
	S0BUF = ucrs232_buffer[ucrec_count];

This two command lines are performed in the ISR. I wrote 16 chars and got back 13 completly different ones.

If I send a message from the 80C51 to the terminal its correct! Also the command from the terminal is correct.

What can be the reason for this wrong reception?

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0 Christian Konrad over 23 years ago in reply to Andrew Neil

Thank you for your message and the baud rate generator. I tryed the baud rate 1200 with and error of +0,17% and I got the same result!
Unfortunatly it was not the reason!

Christian
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0 Christian Konrad over 23 years ago in reply to Andrew Neil

Thank you for your message and the baud rate generator. I tryed the baud rate 1200 with and error of +0,17% and I got the same result!
Unfortunatly it was not the reason!

Christian
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