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/*
    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#include "ch.h"
#include "hal.h"

/*
 * Internal loopback mode, 500KBaud, automatic wakeup, automatic recover
 * from abort mode.
 */
static const CANConfig cancfg = {
  CAN_MCR_ABOM | CAN_MCR_AWUM | CAN_MCR_TXFP,
  CAN_BTR_LBKM | CAN_BTR_SJW(0) | CAN_BTR_TS2(1) |
  CAN_BTR_TS1(8) | CAN_BTR_BRP(6)
};

/*
 * Receiver thread.
 */
static THD_WORKING_AREA(can_rx_wa, 256);
static THD_FUNCTION(can_rx, p) {
  event_listener_t el;
  CANRxFrame rxmsg;

  (void)p;
  chRegSetThreadName("receiver");
  chEvtRegister(&CAND1.rxfull_event, &el, 0);
  while (true) {
    if (chEvtWaitAnyTimeout(ALL_EVENTS, MS2ST(100)) == 0)
      continue;
    while (canReceive(&CAND1, CAN_ANY_MAILBOX, &rxmsg, TIME_IMMEDIATE) == MSG_OK) {
      /* Process message.*/
      palTogglePad(GPIOC, GPIOC_LED_BLUE);
    }
  }
  chEvtUnregister(&CAND1.rxfull_event, &el);
}

/*
 * Transmitter thread.
 */
static THD_WORKING_AREA(can_tx_wa, 256);
static THD_FUNCTION(can_tx, p) {
  CANTxFrame txmsg;

  (void)p;
  chRegSetThreadName("transmitter");
  txmsg.IDE = CAN_IDE_EXT;
  txmsg.EID = 0x01234567;
  txmsg.RTR = CAN_RTR_DATA;
  txmsg.DLC = 8;
  txmsg.data32[0] = 0x55AA55AA;
  txmsg.data32[1] = 0x00FF00FF;

  while (true) {
    canTransmit(&CAND1, CAN_ANY_MAILBOX, &txmsg, MS2ST(100));
    chThdSleepMilliseconds(500);
  }
}

/*
 * Application entry point.
 */
int main(void) {

  /*
   * System initializations.
   * - HAL initialization, this also initializes the configured device drivers
   *   and performs the board-specific initializations.
   * - Kernel initialization, the main() function becomes a thread and the
   *   RTOS is active.
   */
  halInit();
  chSysInit();

  /*
   * Activates the CAN driver 1.
   */
  canStart(&CAND1, &cancfg);

  /*
   * Starting the transmitter and receiver threads.
   */
  chThdCreateStatic(can_rx_wa, sizeof(can_rx_wa), NORMALPRIO + 7, can_rx, NULL);
  chThdCreateStatic(can_tx_wa, sizeof(can_tx_wa), NORMALPRIO + 7, can_tx, NULL);

  /*
   * Normal main() thread activity, in this demo it does nothing.
   */
  while (true) {
    chThdSleepMilliseconds(500);
  }
  return 0;
}
n class="kt">void SetupHardware(void) { #if (ARCH == ARCH_AVR8) /* Disable watchdog if enabled by bootloader/fuses */ MCUSR &= ~(1 << WDRF); wdt_disable(); /* Disable clock division */ clock_prescale_set(clock_div_1); #elif (ARCH == ARCH_XMEGA) /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */ XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU); XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL); /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */ XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ); XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB); PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm; #endif /* Hardware Initialization */ Joystick_Init(); LEDs_Init(); Buttons_Init(); USB_Init(); } /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */ void CheckJoystickMovement(void) { static uint8_t PrevJoystickStatus; uint8_t MIDICommand = 0; uint8_t MIDIPitch; /* Get current joystick mask, XOR with previous to detect joystick changes */ uint8_t JoystickStatus = Joystick_GetStatus(); uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus); /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */ uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1)); if (JoystickChanges & JOY_LEFT) { MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); MIDIPitch = 0x3C; } if (JoystickChanges & JOY_UP) { MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); MIDIPitch = 0x3D; } if (JoystickChanges & JOY_RIGHT) { MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); MIDIPitch = 0x3E; } if (JoystickChanges & JOY_DOWN) { MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); MIDIPitch = 0x3F; } if (JoystickChanges & JOY_PRESS) { MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); MIDIPitch = 0x3B; } if (MIDICommand) { MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t) { .Event = MIDI_EVENT(0, MIDICommand), .Data1 = MIDICommand | Channel, .Data2 = MIDIPitch, .Data3 = MIDI_STANDARD_VELOCITY, }; MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent); MIDI_Device_Flush(&Keyboard_MIDI_Interface); } PrevJoystickStatus = JoystickStatus; } /** Event handler for the library USB Connection event. */ void EVENT_USB_Device_Connect(void) { LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); } /** Event handler for the library USB Disconnection event. */ void EVENT_USB_Device_Disconnect(void) { LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); } /** Event handler for the library USB Configuration Changed event. */ void EVENT_USB_Device_ConfigurationChanged(void) { bool ConfigSuccess = true; ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface); LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); } /** Event handler for the library USB Control Request reception event. */ void EVENT_USB_Device_ControlRequest(void) { MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface); }