[WIP] rtic-usb example - demonstrate read/write on the Teensy 4.0 USB and the USB_OTG1 interrupt
#66
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I'm really interested in getting this working, do you know where to start or what needs to be changed in the library in order to facilitate this? |
Thanks for your interest! The discussion that Mitch linked (here and here) still holds. I can think of a few possible approaches, with increasing levels of effort:
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#91 takes the "remove the USB driver's dependency on SYSTICK" approach to provide USB support for RTIC. It uses this PR as a foundation for that work. |
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91: De-couple SysTick and USB; support USB and RTIC r=mciantyre a=mciantyre The PR separates the USB and SysTick drivers, so we can use USB CDC logging and I/O without running SysTick. Before this PR, the USB driver depended on SysTick for timing a polling loop. With this PR, the USB driver no longer depends on SysTick, and we can use these BSP features independently. The PR addresses the limitations noted in #66 and #64. Now that we can use USB without SysTick, **we can use the USB module with RTIC**. The PR adds two RTIC examples that use USB for logging and direct CDC I/O. The PR includes breaking changes throughout the USB interface. These changes should support BSP power-users who want to understand USB read / write events. The changes also make USB peripheral ownership explicit in user programs, and reduce the responsibility of the BSP. See the CHANGELOG for the specific breakages and migration tips. This PR supersedes #66. Co-authored-by: mitchmindtree <mitchell.nordine@gmail.com> Co-authored-by: Ian McIntyre <ianpmcintyre@gmail.com>
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This is currently not working and the program terminates on
usb.initas discussed here. Still, I thought I'd post progress here in case anyone else diving into this would like a head start.Eventually I hope to come back to this, but my current priority is writing a lib for the TMC2209 motor driver.