ChibiOS/demos/ARM7-LPC214x-GCC/main.c

/*
    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <ch.h>

#include "lpc214x.h"
#include "lpc214x_serial.h"
#include "mmcsd.h"
#include "buzzer.h"
#include "evtimer.h"

/*
 * System Idle Thread, this thread only runs when on other threads in the
 * system require the CPU.
 * The role of this thread is to minimize the power consumption when idling
 * and serve the interrupts.
 */
static BYTE8 waIdleThread[UserStackSize(16)];
static t_msg IdleThread(void *arg) {

  chSysPause();
}

/*
 * Red LEDs blinker thread, times are in milliseconds.
 */
static BYTE8 waThread1[UserStackSize(32)];
static t_msg Thread1(void *arg) {

  while (TRUE) {
    IO0CLR = 0x00000800;
    chThdSleep(200);
    IO0SET = 0x00000C00;
    chThdSleep(800);
    IO0CLR = 0x00000400;
    chThdSleep(200);
    IO0SET = 0x00000C00;
    chThdSleep(800);
  }
  return 0;
}

/*
 * Yellow LED blinker thread, times are in milliseconds.
 */
static BYTE8 waThread2[UserStackSize(32)];
static t_msg Thread2(void *arg) {

  while (TRUE) {
    IO0CLR = 0x80000000;
    chThdSleep(200);
    IO0SET = 0x80000000;
    chThdSleep(300);
  }
  return 0;
}

/*
 * Executed as event handler at 500mS intervals.
 */
static void TimerHandler(t_eventid id) {
  t_msg TestThread(void *p);

  if (!(IO0PIN & 0x00018000)) { // Both buttons
    TestThread(&COM1);
    PlaySound(500, 100);
  }
  else {
    if (!(IO0PIN & 0x00008000)) // Button 1
      PlaySound(1000, 100);
    if (!(IO0PIN & 0x00010000)) { // Button 2
      chFDDWrite(&COM1, (BYTE8 *)"Hello World!\r\n", 14);
      PlaySound(2000, 100);
    }
  }
}

/*
 * Plays sounds when a MMC/SD card is inserted, then initializes the MMC
 * driver and reads a sector.
 */
static void InsertHandler(t_eventid id) {
  static BYTE8 rwbuf[512];
  MMCCSD data;

  PlaySoundWait(1000, 100);
  PlaySoundWait(2000, 100);
  if (mmcInit())
    return;
  /* Card ready, do stuff.*/
  if (mmcGetSize(&data))
    return;
  if (mmcRead(rwbuf, 0))
    return;
  PlaySound(440, 200);
}

/*
 * Plays sounds when a MMC/SD card is removed.
 */
static void RemoveHandler(t_eventid id) {

  PlaySoundWait(2000, 100);
  PlaySoundWait(1000, 100);
}

/*
 * Entry point, the interrupts are disabled on entry.
 */
int main(int argc, char **argv) {
  static const t_evhandler evhndl[] = {
    TimerHandler,
    InsertHandler,
    RemoveHandler
  };
  static EvTimer evt;
  struct EventListener el0, el1, el2;

  /*
   * The main() function becomes a thread here then the interrupts are
   * enabled and ChibiOS/RT goes live.
   */
  chSysInit();

  /*
   * This thread has the lowest priority in the system, its role is just to
   * execute the chSysPause() and serve interrupts in its context.
   * In ChibiOS/RT at least one thread in the system *must* execute
   * chThdPause(), it can be done in a dedicated thread or in the main()
   * function (that would never exit the call).
   */
  chThdCreate(IDLEPRIO, 0, waIdleThread, sizeof(waIdleThread), IdleThread, NULL);

  /*
   * If a button is pressed during the reset then the blinking leds threads
   * are not started in order to make accurate benchmarks.
   */
  if ((IO0PIN & 0x00018000) == 0x00018000) {
    chThdCreate(NORMALPRIO, 0, waThread1, sizeof(waThread1), Thread1, NULL);
    chThdCreate(NORMALPRIO, 0, waThread2, sizeof(waThread2), Thread2, NULL);
  }

  /*
   * Allows the other threads to run by lowering the priority, remember,
   * the priority is set to the maximum in the \p chSysInit().
   */
  chThdSetPriority(NORMALPRIO);

  /*
   * Normal main() activity, in this demo it server events incoming from
   * various sources.
   */
  evtInit(&evt, 500);           /* Initializes an event timer object.   */
  evtRegister(&evt, &el0, 0);   /* Registers on the timer event source. */
  evtStart(&evt);               /* Starts the event timer.              */
  mmcStartPolling();            /* Starts the MMC connector polling.    */
  chEvtRegister(&MMCInsertEventSource, &el1, 1);
  chEvtRegister(&MMCRemoveEventSource, &el2, 2);
  while (TRUE)                  /* Just serve events.                   */
    chEvtWait(ALL_EVENTS, evhndl);
  return 0;
}