SPI debug on ST

Follow

Jacovdm

• May 19, 2017 10:52

While debugging the SPI on a ST32F303, it looks as if the debugger reads the SPI-DR data register, resulting in that the RXNE flag & FRLVL[] bits of the status register gets cleared. When my code inspect the SR to see if the next byte was recieved, it fails.

Is there a way to stop the debugger from reading the SPI-DR?

 

0

• 

  Ron Black

  • June 05, 2017 13:42

  I'm not sure what you mean.  If you mean that the debugger is reading the SR on it's own,  I don't know why that would happen.  Perhaps you could elaborate on the whole event from before to after the SR being read.

  If you have the SR set as a watch variable, it will probably get read at unpredictable times.  Otherwise, only your code would read that register.

   

  Which debugger are you using?  Do you have a code snippet?

  0

  Comment actions Permalink

Please sign in to leave a comment.