protocol/usb_hid/USB_Host_Shield_2.0/examples/HID/USBHIDJoystick/hidjoystickrptparser.cpp

   1 #include "hidjoystickrptparser.h"
   2
   3 JoystickReportParser::JoystickReportParser(JoystickEvents *evt) :
   4 joyEvents(evt),
   5 oldHat(0xDE),
   6 oldButtons(0) {
   7         for (uint8_t i = 0; i < RPT_GEMEPAD_LEN; i++)
   8                 oldPad[i] = 0xD;
   9 }
  10
  11 void JoystickReportParser::Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf) {
  12         bool match = true;
  13
  14         // Checking if there are changes in report since the method was last called
  15         for (uint8_t i = 0; i < RPT_GEMEPAD_LEN; i++)
  16                 if (buf[i] != oldPad[i]) {
  17                         match = false;
  18                         break;
  19                 }
  20
  21         // Calling Game Pad event handler
  22         if (!match && joyEvents) {
  23                 joyEvents->OnGamePadChanged((const GamePadEventData*)buf);
  24
  25                 for (uint8_t i = 0; i < RPT_GEMEPAD_LEN; i++) oldPad[i] = buf[i];
  26         }
  27
  28         uint8_t hat = (buf[5] & 0xF);
  29
  30         // Calling Hat Switch event handler
  31         if (hat != oldHat && joyEvents) {
  32                 joyEvents->OnHatSwitch(hat);
  33                 oldHat = hat;
  34         }
  35
  36         uint16_t buttons = (0x0000 | buf[6]);
  37         buttons <<= 4;
  38         buttons |= (buf[5] >> 4);
  39         uint16_t changes = (buttons ^ oldButtons);
  40
  41         // Calling Button Event Handler for every button changed
  42         if (changes) {
  43                 for (uint8_t i = 0; i < 0x0C; i++) {
  44                         uint16_t mask = (0x0001 << i);
  45
  46                         if (((mask & changes) > 0) && joyEvents)
  47                                 if ((buttons & mask) > 0)
  48                                         joyEvents->OnButtonDn(i + 1);
  49                                 else
  50                                         joyEvents->OnButtonUp(i + 1);
  51                 }
  52                 oldButtons = buttons;
  53         }
  54 }
  55
  56 void JoystickEvents::OnGamePadChanged(const GamePadEventData *evt) {
  57         Serial.print("X1: ");
  58         PrintHex<uint8_t > (evt->X, 0x80);
  59         Serial.print("\tY1: ");
  60         PrintHex<uint8_t > (evt->Y, 0x80);
  61         Serial.print("\tX2: ");
  62         PrintHex<uint8_t > (evt->Z1, 0x80);
  63         Serial.print("\tY2: ");
  64         PrintHex<uint8_t > (evt->Z2, 0x80);
  65         Serial.print("\tRz: ");
  66         PrintHex<uint8_t > (evt->Rz, 0x80);
  67         Serial.println("");
  68 }
  69
  70 void JoystickEvents::OnHatSwitch(uint8_t hat) {
  71         Serial.print("Hat Switch: ");
  72         PrintHex<uint8_t > (hat, 0x80);
  73         Serial.println("");
  74 }
  75
  76 void JoystickEvents::OnButtonUp(uint8_t but_id) {
  77         Serial.print("Up: ");
  78         Serial.println(but_id, DEC);
  79 }
  80
  81 void JoystickEvents::OnButtonDn(uint8_t but_id) {
  82         Serial.print("Dn: ");
  83         Serial.println(but_id, DEC);
  84 }