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felis / USB_Host_Shield_2.0

Revision 2.0 of USB Host Library for Arduino.
https://chome.nerpa.tech
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Why does USB Host Shield SS pin voltage keep high? #710

Open Low-maooldcat opened 2 years ago

Low-maooldcat commented 2 years ago

Hello: I used Arduino UNO with USB Host Shield, and they can work, but I found USB Host Shield SS pin is high. In MAX3421E data sheet, if SS pin is low, then SPI data can transmit. As far as I understand, SS pin should be low to transmit data, but SS pin is now high and can be used normally.

Thanks.

YuuichiAkagawa commented 2 years ago

My Arduino UNO's SS is low. I don't know why yours is high.
Note : It's only LOW during communication, not always LOW. arduino-uno-uhs2-logic

Low-maooldcat commented 2 years ago

我的 Arduino UNO 的 SS 很低。不知道為什麼你的高。 注意：它只是在通信期間為低電平，並不總是為低電平。 arduino-uno-uhs2-邏輯

Hi, can you share your test code?

YuuichiAkagawa commented 2 years ago

https://github.com/felis/USB_Host_Shield_2.0/blob/master/examples/USBH_MIDI/USBH_MIDI_dump/USBH_MIDI_dump.ino And MIDI keyboard is connected.

or

https://github.com/felis/USB_Host_Shield_2.0/blob/master/examples/HID/USBHIDBootMouse/USBHIDBootMouse.ino And USB mouse is connected.