109 lines
No EOL
2.5 KiB
C++
109 lines
No EOL
2.5 KiB
C++
/*
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Copyright (c) 2014 NicoHood
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See the readme for credit to other people.
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Advanced RawHID example
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Shows how to send bytes via raw HID
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Press a button to send some example values.
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Keep in mind that you can only send full data packets, the rest is filled with zero!
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Definitions from HID_Reports.h:
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RAWHID_USAGE_PAGE 0xFFC0 // recommended: 0xFF00 to 0xFFFF
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RAWHID_USAGE 0x0C00 // recommended: 0x0100 to 0xFFFF
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RAWHID_TX_SIZE 15 // 1 byte for report ID
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RAWHID_RX_SIZE 15 // 1 byte for report ID
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*/
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const int pinLed = LED_BUILTIN;
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const int pinButton = 2;
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void setup() {
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pinMode(pinLed, OUTPUT);
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pinMode(pinButton, INPUT_PULLUP);
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// no begin function needed for RawHID
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// Make sure all desired USB functions are activated in USBAPI.h!
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}
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void loop() {
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if (!digitalRead(pinButton)) {
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digitalWrite(pinLed, HIGH);
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// direct without library. Always send RAWHID_RX_SIZE bytes!
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uint8_t buff[RAWHID_RX_SIZE]; // unitialized, has random values
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HID_SendReport(HID_REPORTID_RawKeyboardReport, buff, sizeof(buff));
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// with library
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memset(&buff, 42, sizeof(buff));
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RawHID.write(buff, sizeof(buff));
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// write a single byte, will fill the rest with zeros
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RawHID.write(0xCD);
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// huge buffer with library, will fill the rest with zeros
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uint8_t megabuff[64];
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for (int i = 0; i < sizeof(megabuff); i++)
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megabuff[i] = i;
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RawHID.write(megabuff, sizeof(megabuff));
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// You can use print too, but better dont use a linefeed
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RawHID.println("Hello World");
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// And compare it to write:
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RawHID.write("Hello World\r\n");
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// simple debounce
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delay(300);
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digitalWrite(pinLed, LOW);
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}
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}
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/*
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Expected output:
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// manual with unintialized buff
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recv 15 bytes:
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01 55 C1 FF 01 01 01 00 00 01 00 00 01 00 20
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// filled buff
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recv 15 bytes:
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2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A
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// single byte filled with zero
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recv 15 bytes:
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CD 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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// huge buffer filled with zero at the end
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recv 15 bytes:
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00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
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recv 15 bytes:
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0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D
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recv 15 bytes:
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1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C
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recv 15 bytes:
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2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B
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recv 15 bytes:
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3C 3D 3E 3F 00 00 00 00 00 00 00 00 00 00 00
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// print
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recv 15 bytes:
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48 65 6C 6C 6F 20 57 6F 72 6C 64 00 00 00 00
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//\r
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recv 15 bytes:
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0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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//\n
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recv 15 bytes:
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0A 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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//write
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recv 15 bytes:
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48 65 6C 6C 6F 20 57 6F 72 6C 64 0D 0A 00 00
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*/ |