---
** [tickets:#291] While debugging with BCM2835, no SPI communication is
possible**
**Status:** new
**Milestone:** 0.10.0
**Created:** Sat Jan 09, 2021 09:16 PM UTC by Gerald
**Last Updated:** Sat Jan 09, 2021 09:16 PM UTC
**Owner:** nobody
Hello,
I ran into a problem that I cannot use the SPI interface on the Raspberry PI
(RPI as master) while I am debugging a microcontroller. Only the CS toggles,
But MOSI and SCLK is quiet. When I stop debugging, SPI works. At least when I
am using the BCM2835 driver. I switched to sysfsgpio driver for test, which is
a lot slower, but SPI communication is possible while debugging. So I guess the
driver is somehow blocking the pins.
As a side note, I am using GPIO8-11 for SPI and GPIO20-21 for SWD debugging.
The standard setup in this driver is that for JTAG the same pins are used as I
am using for SPI. I changed them in the config file, even thought I am using
SWD, but it still doesn't work. The sourcecode doesn't seem to use those
specific pins for initialization.
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