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[ZeROSEro7] Host USB still get no descriptor…

This week, as last week, I worked on schematics and USB Keyboard.

Schematics and PCB

We almost finished schematics ! The second review on the USB Sniffer and the Stealth Drop was valid and few details have to be updated on the Spy Talk. PCB will be updated very soon.

USB Keyboard

I continued to work on the USB Keyboard issue. I updated the Makefile to compile with the ChibiOS_Contrib to use hal_usbh.h library.

In this file, there are some interesting typedefs:

  • USBHDriver
  • usbh_status
  • usbh_device
  • usbh_port
  • usbh_ep

…and some interesting functions:

  • usbhStart(USBHDriver *usbh);
  • usbhMainLoop(USBHDriver *usbh);
  • usbhDevicePrintInfo(usbh_device_t *dev);
  • usbhDevicePrintConfiguration(const uint8_t *descriptor, uint16_t rem);

I also found a very nice post on the ChibiOS forum which explain USB Host stack and driver for STM32. The contributor said he is still in development but he did it with some device like a Keyboard. It was 2 years ago, but I found some //TODO comment in the last ChibiOS version.

I got back files from HOST_USB example to integrate it in my project. I’m able to compile it and I added code in the main.c to use it. I configured OTG_HS (OTG2) pad correctly. I even verified the 5V tension on the USB_VBUS with a multi-meter and some device like a mouse where I can see LED turn on.

I used usbhDevicePrintInfo and usbhDevicePrintConfiguration on the USBHDriver USBHD2 to observe on the RTT connection all device information. Nevertheless, nothing happens and I only can see :

usbhDevicePrintInfo
----- Device info -----
Device descriptor:
USBSpec=0000, #configurations=0, langID0=0000
Class=00, Subclass=00, Protocol=00
VID=0000, PID=0000, Release=0000
----- End Device info -----

usbhDevicePrintConfiguration
----- Configuration info -----
Configuration descriptor:
Configuration 101, #IFs=104
----- End Configuration info -----

I’m still working on the step to get back USB Keyboard descriptor…

Next Week

Next week, I will command all PCB before Christmas and I will continue to work on the USB Keyboard.

Erwan

IT Student

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