4f80972c23
that said, it's possible this api might return a variety of non-zero codes. code could benefit from being updated (e.g., documenting return codes)
114 lines
3 KiB
C++
114 lines
3 KiB
C++
/*
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Keyboard Controller Example
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Shows the output of a USB Keyboard connected to
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the Native USB port on an Arduino Zero
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created 8 Oct 2012
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by Cristian Maglie
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http://arduino.cc/en/Tutorial/KeyboardController
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This sample code is part of the public domain.
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*/
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// Require keyboard control library
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#include <KeyboardController.h>
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// on a zero with debug port, use debug port
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//#define SerialDebug Serial
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// on a feather or non-debug Zero, use Serial1 (since USB is taken!)
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#define SerialDebug Serial1
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// Initialize USB Controller
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USBHost usb;
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// Attach keyboard controller to USB
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KeyboardController keyboard(usb);
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void printKey();
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// This function intercepts key press
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void keyPressed() {
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SerialDebug.print("Pressed: ");
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printKey();
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}
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// This function intercepts key release
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void keyReleased() {
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SerialDebug.print("Released: ");
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printKey();
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}
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void printKey() {
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// getOemKey() returns the OEM-code associated with the key
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SerialDebug.print(" key:");
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SerialDebug.print(keyboard.getOemKey());
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// getModifiers() returns a bits field with the modifiers-keys
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int mod = keyboard.getModifiers();
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SerialDebug.print(" mod:");
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SerialDebug.print(mod);
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SerialDebug.print(" => ");
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if (mod & LeftCtrl)
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SerialDebug.print("L-Ctrl ");
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if (mod & LeftShift)
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SerialDebug.print("L-Shift ");
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if (mod & Alt)
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SerialDebug.print("Alt ");
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if (mod & LeftCmd)
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SerialDebug.print("L-Cmd ");
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if (mod & RightCtrl)
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SerialDebug.print("R-Ctrl ");
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if (mod & RightShift)
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SerialDebug.print("R-Shift ");
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if (mod & AltGr)
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SerialDebug.print("AltGr ");
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if (mod & RightCmd)
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SerialDebug.print("R-Cmd ");
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// getKey() returns the ASCII translation of OEM key
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// combined with modifiers.
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SerialDebug.write(keyboard.getKey());
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SerialDebug.println();
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}
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uint32_t lastUSBstate = 0;
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void setup()
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{
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SerialDebug.begin( 115200 );
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SerialDebug.println("USB Host Keyboard Controller Program started");
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if (usb.Init() == (uint32_t)-1)
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SerialDebug.println("USB Host did not start.");
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SerialDebug.println("USB Host started");
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delay( 20 );
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}
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void loop()
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{
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// Process USB tasks
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usb.Task();
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uint32_t currentUSBstate = usb.getUsbTaskState();
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if (lastUSBstate != currentUSBstate) {
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SerialDebug.print("USB state changed: 0x");
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SerialDebug.print(lastUSBstate, HEX);
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SerialDebug.print(" -> 0x");
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SerialDebug.println(currentUSBstate, HEX);
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switch (currentUSBstate) {
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case USB_ATTACHED_SUBSTATE_SETTLE: SerialDebug.println("Device Attached"); break;
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case USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE: SerialDebug.println("Detached, waiting for Device"); break;
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case USB_ATTACHED_SUBSTATE_RESET_DEVICE: SerialDebug.println("Resetting Device"); break;
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case USB_ATTACHED_SUBSTATE_WAIT_RESET_COMPLETE: SerialDebug.println("Reset complete"); break;
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case USB_STATE_CONFIGURING: SerialDebug.println("USB Configuring"); break;
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case USB_STATE_RUNNING: SerialDebug.println("USB Running"); break;
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}
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lastUSBstate = currentUSBstate;
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}
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}
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