WIP example app using custom furi glue for tinyusb, to allow the Flipper Zero to use the MAX3421E as a USB host controller.
Doing all testing with https://www.adafruit.com/product/5858 currently. Previously was trying with https://www.amazon.com/dp/B01EWW9R1E, 2 of 2 chips bought from Amazon wouldn't properly respond over SPI — recommend avoiding this product and/or seller.
F0 pins as follows:
- (Default external SPI) MISO = PA6
- (Default external SPI) MOSI = PA7
- (Default external SPI) CLK = PB3
- (Default external SPI) CS = PA4
- INT = PB2
TODO:
- Cleanup worker, setup proper callbacks w/ stream buffer & textbox
- Figure out why MAX never asserts
OSCOKIRQpost-issuingUSBCTL CHIPRES- Others have reported this as a chip misdesign
- test replacing wait for
OSCOKIRQw/ simple delay - PR
tinyusb?