rpi zero otg

rpi 4 cm 에서 usb를 쓰려면 config.txt에 다음의 내용을 추가해야 하는데

dtoverlay=dwc2,dr_mode=host

 

$ modinfo dwc2 filename:       /lib/modules/5.10.60-v7+/kernel/drivers/usb/dwc2/dwc2.ko license:        Dual BSD/GPL author:         Synopsys, Inc. description:    DESIGNWARE HS OTG Core license:        Dual BSD/GPL author:         Matthijs Kooijman <matthijs@stdin.nl> description:    DESIGNWARE HS OTG Platform Glue srcversion:     C0FF7C976DCDD3E4810AFB1 alias:          of:N*T*Cst,stm32mp15-hsotgC* alias:          of:N*T*Cst,stm32mp15-hsotg alias:          of:N*T*Cst,stm32mp15-fsotgC* alias:          of:N*T*Cst,stm32mp15-fsotg alias:          of:N*T*Cst,stm32f7-hsotgC* alias:          of:N*T*Cst,stm32f7-hsotg alias:          of:N*T*Cst,stm32f4x9-hsotgC* alias:          of:N*T*Cst,stm32f4x9-hsotg alias:          of:N*T*Cst,stm32f4x9-fsotgC* alias:          of:N*T*Cst,stm32f4x9-fsotg alias:          of:N*T*Capm,apm82181-dwc-otgC* alias:          of:N*T*Capm,apm82181-dwc-otg alias:          of:N*T*Camcc,dwc-otgC* alias:          of:N*T*Camcc,dwc-otg alias:          of:N*T*Camlogic,meson-g12a-usbC* alias:          of:N*T*Camlogic,meson-g12a-usb alias:          of:N*T*Camlogic,meson-gxbb-usbC* alias:          of:N*T*Camlogic,meson-gxbb-usb alias:          of:N*T*Camlogic,meson8b-usbC* alias:          of:N*T*Camlogic,meson8b-usb alias:          of:N*T*Camlogic,meson8-usbC* alias:          of:N*T*Camlogic,meson8-usb alias:          of:N*T*Csamsung,s3c6400-hsotgC* alias:          of:N*T*Csamsung,s3c6400-hsotg alias:          of:N*T*Csnps,dwc2C* alias:          of:N*T*Csnps,dwc2 alias:          of:N*T*Clantiq,xrx200-usbC* alias:          of:N*T*Clantiq,xrx200-usb alias:          of:N*T*Clantiq,arx100-usbC* alias:          of:N*T*Clantiq,arx100-usb alias:          of:N*T*Crockchip,rk3066-usbC* alias:          of:N*T*Crockchip,rk3066-usb alias:          of:N*T*Chisilicon,hi6220-usbC* alias:          of:N*T*Chisilicon,hi6220-usb alias:          of:N*T*Cbrcm,bcm2835-usbC* alias:          of:N*T*Cbrcm,bcm2835-usb depends:        udc-core,roles intree:         Y name:           dwc2 vermagic:       5.10.60-v7+ SMP mod_unload modversions ARMv7 p2v8 pi@raspberrypi:~ $ modinfo dwc2 -v

 

dtoverlay 상으로는 dr_mode 에 host / peripheral / otg를 넣을수 있다고 한다.

$ sudo dtoverlay -h dwc2 Name:   dwc2 Info:   Selects the dwc2 USB controller driver Usage:  dtoverlay=dwc2,<param>=<val> Params: dr_mode                 Dual role mode: "host", "peripheral" or "otg"         g-rx-fifo-size          Size of rx fifo size in gadget mode         g-np-tx-fifo-size       Size of non-periodic tx fifo size in gadget                                 mode

 

otg 설정에 주변기기로 인식을 시키네..?

dtoverlay=dwc2,dr_mode=peripheral in file /boot/config.txt.

[링크 : https://gist.github.com/gbaman/50b6cca61dd1c3f88f41]