mirror of
https://github.com/nopnop2002/esp-idf-ssd1306.git
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65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
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# MouseSelectDemo for SSD1306
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Demo of selecting characters using the mouse.
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I used [this](https://github.com/espressif/esp-idf/tree/master/examples/peripherals/usb/host/hid) as a reference.
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# Hardware requirements
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- ESP32S2/S3
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These have USB-HOST functionality.
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- USB Connector
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I used this:
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- USB mouse
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2-button or 3-button usb mouse.
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Button 2/3 is not used in this project.
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# USB wiring
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To stabilize the power supply, I placed a 100uF electrolytic capacitor between 5V and GND.
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```
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ESP32-S2/S3 BOARD USB CONNECTOR
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+--+
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[ 5V ] +---------> | || VCC
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[GPIO 19] |---------> | || D-
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[GPIO 20] |---------> | || D+
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[ GND ] |--------+> | || GND
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+---||---+
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100uF
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```
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# USB hot socket
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There are times when it works correctly and times when it doesn't.
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It works more stably if you connect before starting the firmware.
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When it works correctly, a log like this will be displayed.
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```
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I (1166) usb_hid: hid_host_device_callback
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I (1166) usb_hid: HID Device, protocol 'MOUSE' CONNECTED
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```
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# Using USB-HUB
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I tried it, but it doesn't work properly via USB-HUB.
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# Transfer failed error
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For some reason, the following error may occur in rare cases.
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This error occurs within [this](https://components.espressif.com/components/espressif/usb_host_hid) component.
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It is unclear whether it is a component bug or an effect of electrical noise.
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Some kind of stabilization circuitry may be required.
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It may come back to life if you unplugging the mouse and plugging it again.
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I would like to hear the opinion of someone who is familiar with USB electrical circuits.
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```
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E (12287696) hid-host: Transfer failed, status 1
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E (12287696) usb_hid: HID Device, protocol 'MOUSE' TRANSFER_ERROR
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E (15953516) USBH: Device 1 gone
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```
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# Keyboard with mouse function
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I have a keyboard with mouse functionality, but the keyboard with mouse functionality does not work as a mouse.
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See [here](https://github.com/espressif/esp-idf/issues/12667).
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