/*
    ChibiOS - Copyright (C) 2006..2018 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"
#include "chprintf.h"
#include "string.h"
#include <time.h>

/* This macro converts from decimal to BCD */
#define decimal2BCD(nt, nu)          ((nt << 4) | (nu))

#define SIZE 30

RTCDateTime cfg_time = {
  38,
  4,
  0,
  1,
  9,
  66840000
};

RTCDateTime now_DateTime;
struct tm now_tm;

char buffer[SIZE];

/*
 * Alarm configuration.
 * Fields are in BCD format
 */
RTCAlarm alarmspec = {
  RTC_TIMALR_HOUREN | RTC_TIMALR_HOUR(decimal2BCD(1,8)) |
  RTC_TIMALR_MINEN | RTC_TIMALR_MIN(decimal2BCD(3,5)) ,   /* timalarm */
  0                                                       /* calalarm */
};

/*
 * Alarm callback.
 */
static void alarm_cb(RTCDriver *rtcp, rtcevent_t event) {

  (void)rtcp;

  switch (event) {
  case RTC_EVENT_SECOND:
    /* Toggle Led green very second */
    palToggleLine(LINE_LED_GREEN);
    break;
  case RTC_EVENT_ALARM:
    /* Led red on alarm */
    palClearLine(LINE_LED_RED);
    break;
  }
}

static const SerialConfig sdcfg = {
  115200,
  0,
  UART_MR_PAR_NO
};

/*
 * LED blinker thread, times are in milliseconds.
 */
static THD_WORKING_AREA(waThread1, 512);
static THD_FUNCTION(Thread1, arg) {

  (void)arg;
  chRegSetThreadName("blinker");

  while (true) {
    palToggleLine(LINE_LED_BLUE);
    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 serial driver 1 using the driver default configuration.
   */
  sdStart(&SD1, &sdcfg);

  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO , Thread1, NULL);

  /*
   * Configures date
   */
  rtcSetTime(&RTCD0, &cfg_time);
  rtcSetAlarm(&RTCD0, 0, &alarmspec);
  rtcSetCallback(&RTCD0, alarm_cb);

  while (true) {
    if(!palReadPad(PIOB, PIOB_USER_PB)) {
      rtcGetTime(&RTCD0, &now_DateTime);
      rtcConvertDateTimeToStructTm(&now_DateTime, &now_tm, NULL);
      strftime(buffer, SIZE, "%Y-%m-%d %H:%M:%S", &now_tm);
      chprintf((BaseSequentialStream *) &SD1,"Current time:%s\n\r",buffer);
    }
    chThdSleepMilliseconds(1000);
  }
}