Support of several instances of TinyUSB stack (device or host)

[roma-jam]

Related area

port support

Hardware specification

all hardware with several ports

Is your feature request related to a problem?

Unable to init stack on two ports simultaneously.

Relates to:

• https://github.com/hathach/tinyusb/issues/1673#issuecomment-1273193613

Describe the solution you'd like

Possibility to run TinyUSB (device) stack on several peripherals (ports) simultaneously.

In the code that would be like:

tusb_rhport_init_t dev_init = {
  .role = TUSB_ROLE_DEVICE,
  .speed = TUSB_SPEED_AUTO
};

tusb_rhport_init(0, &dev_init);
tusb_rhport_init(1, &dev_init);

I have checked existing issues, dicussion and documentation

• [x] I confirm I have checked existing issues, dicussion and documentation.

[hathach]

I can try to get host stack running on multiple controllers (same usbip) easily. For device, it needs quite a bit of works, and it is kind of neat and not popular feature. I am not sure Icould mannge the time to do it myself, however PR is welcome.

[savenlid]

@hathach I try to get my head around this.

Can a simple matrix explain the possibly combinations in a system with multiple USB ports ? Also the dual-role, possibilities if you tear down the interface completely. With USB-C there is also the CC pins and some chips have CC-pin-handling built in, and for others we need to use external chip over I2C, is there some docs on dealing with DRD switching ? I see there is a way to assign a pin for binary identification of the VBUS power. I would also be happy if this binary value could be provided with a boolen. I would prefer to read it with and ADC (ESP32-P4) judge the level and deliver a boolean to tiny-USB. The level when a chip switch a gpio input from high <-> low can be shaky (not well defined).

Also its a bit tricky to identtify what is just connected to your USB port with this mechanism alone. For me to identify a USB-Memory stick I assume I need to provide the VUSB, and then I will not notice if a laptop connects and wants a RNDIS connection.

Any pointers to docs ?

Maybe already is in some doc, that I have not read.

Sorry for going completely OT, but I am new to this tinyusb, due to using esp32-p4, so a lot to catch-up.

ps I guess in the future it will become more common even for "small" processors to have multiple USB-Port, ESP32-P4 style. ds

[hathach]

there is minimal docs for getting started. For this, you need to check code base.

There is lots of mcus with multiple usb ports already.

[kbladewht]

I can try to get host stack running on multiple controllers (same usbip) easily. For device, it needs quite a bit of works, and it is kind of neat and not popular feature. I am not sure Icould mannge the time to do it myself, however PR is welcome.

would you share how to get host stack running on muliple controllers (2 hosts?)for tiny usb?