uart receives the same byte!!!

[xmart]

I am using Stm32l0 and am receiving data from GPS via uart but I am facing this problem.

uart receives the first byte and then repeats the number of bytes it wanted to receive

For example:

AL_UART_Receive (& huart1, buf, 80, 200);

It receives the first letter "$" eighty times !!

like this $$$$$$$$$$$$$$$$$........80 time

[Tesla DeLorean · Accepted solution]

That's great, but what do you expect anyone to do with one line of code outside any context?

Is this a custom board, or one someone else might be familiar with?

Which UART is the GPS attached too?

Is there another UART debug information can be printed too?

Attach, not-inline, a single source file if it contains all the code for clocks, pins and peripheral initialization, or a whole project as a single .ZIP file.

[TDK]

Do you have the ability to probe the lines to see what is actually being sent?

Bump up the timeout from 200 to HAL_MAX_DELAY to see if that changes things.

Ensure your clock settings are correct.

[waclawek.jan]

> It receives the first letter "$" eighty times !!

How do you know?

JW

[Pavel A.]

Are the UART1 registers opened in debugger view? (not a good idea)

-- pa