USB only works for RNDIS

Julius,

The BRK appears as a USB “peripheral” for RNDIS networking support. You confirmed that this works.

Now you want to switch roles and have the OTG work as a “host”. In “host” mode, the OTG can be configured to provide power to the device such as a WIFI dongle. I assume that you are using an OTG cable since the Edimax is a USB Type-A peripheral and the BRK board is a USB Type-B micro. The cable has circuitry to inform the OTG that a peripheral is attached.

It is not clear if the role switch is occurring and I don’t recall off the top of my head if the BRK has circuitry for VBUS and ID (and, of course, power supply pins other than USB). For testing your custom design, I would suggest you set in the device tree under the usbotg_hs node dr_mode = “peripheral”, usb-role-switch, and role-switch-default_mode = “peripheral”.

ST has a page on configuring OTG: https://wiki.st.com/stm32mpu/wiki/OTG_device_tree_configuration.  Take a look at the example in section 3.3.5.

Carlos

The Micro-USB port for the BRK is designed to function as a peripheral port with added RNDIS function. It is probably not detecting the dongle because the ID pin(PA10) is not connected to the Micro-USB connector of BRK board. You will notice all device tree examples shown in https://wiki.st.com/stm32mpu/wiki/OTG_device_tree_configuration use the ID pin. As Carlos suggested, you can try assigning the OTG port as a “host” by following the example shown here: https://wiki.st.com/stm32mpu/wiki/OTG_device_tree_configuration#DT_configuration_example_as_high-speed_OTG_in_Host_or_Peripheral_mode-2C_with_micro-B_or_Type-C_connector-2C_and_with_VBUS_and_ID_left_unconnected replacing “peripheral” with “host”.

Please also note that BRK exposes the USB Host port data pins on header pins PB29 and PB30(https://octavosystems.com/docs/osd32mp1-brk-schematics/). You should be able to use a USB Type A Female breakout board such as https://www.sparkfun.com/products/12700 to connect your WiFi dongle to USB1 peripheral of MP1.