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apache / nuttx

Apache NuttX is a mature, real-time embedded operating system (RTOS)
https://nuttx.apache.org/
Apache License 2.0
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RP2040 Raspberry Pico W SPI not working #9392

Closed paolovolpi closed 8 months ago

paolovolpi commented 1 year ago

I'm facing some issue with the Raspberry Pico W spi (both). Compiling for example the raspberrypi-pico-w:st7735 project using raspberry SDK v1.4.0 and attaching an oscilloscope to the spi1 pins I can't see any transaction executing the fb application. Same example but for the pico let me see the spi transaction. I already tested a bunch of pico-w without success.

acassis commented 1 year ago

@paolovolpi can you please try with some old version? Maybe test some version just after st7735 support was added to confirm it was working.

paolovolpi commented 1 year ago

Same test done with commit 74f1bfbfd7d578ba74f1885548a8be0901df0c34 confirm the problem. Be careful is not an issue related to the specific application, I'm facing same problem with my personal projects, spi working fine on raspberry pico and fails on raspberry pico-w

paolovolpi commented 1 year ago

After some more investigation I found that compiling nuttx with raspberry pico sdk 1.5.0 I can see transaction with the oscilloscope but they are wrong, Sck and Mosi are not synched in the right way.

acassis commented 1 year ago

Hi @paolovolpi thank you for this investigation! We need to find some way to do hardware debug. Some CI test on real hardware is definitely required!

Few days ago I tested ESP32-Devkit with GT911 touchscreen and discovered that I2C is not sending all the data correctly. It sends the I2C Address, two bytes of GT911 internal register (ie. 0x8040) but doesn't send the value to that register. Same gt9xx.c driver tested on STM32F4Discovered board worked fine.

paolovolpi commented 1 year ago

Hi after a lot of more investigation I was able to fix the issue using the raspberry pico sdk 1.5.0. Still not working with the 1.4.0 but with the 1.5.0 the spi is working as expected (we had some hardware issue with our dev board). I had to replace the sdk 1.5.0 wifi driver (/lib/cyw43-driver) with the 1.4.2 one, because the file structures is changed and is not compatible with the nuttx sources.

acassis commented 8 months ago

@paolovolpi my friend @JorgeGzm is facing similar issue. So you need to mix the wifi firmware from sdk 1.4.2 with sdk 1.5.0 to get WiFi working? Could you please share more details (the steps to get it working).

I think we need to document this process or even better: update the NuttX files to working with recent SDK

acassis commented 8 months ago

@paolovolpi it worked here! I cloned 1.4.0, then updated the firmware submodule lib/, then cp -a lib /tmp, clone 1.5.0 removed lib and cp -a /tmp/lib .

paolovolpi commented 8 months ago

The problem with the spi was related to my custom pcb. The issue related to the SDK still remain. If you want to use sdk 1.5 you need to replace the sdk direcotry lib/cyw43-driver with the one from version 1.4