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////////////////////////////////////////////////////////////////////////////////

//

// Filename:    doorbell.c

//

// Project:     CMod S6 System on a Chip, ZipCPU demonstration project

//

// Purpose:     

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2016, Gisselquist Technology, LLC

//

// This program is free software (firmware): 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.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY 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.  (It's in the $(ROOT)/doc directory, run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#include "zipsys.h"

#include "board.h"

#include "ksched.h"

#include "kfildes.h"

#include "taskp.h"

#include "syspipe.h"

#include "ktraps.h"

#include "errno.h"

#include "swint.h"

#include "../dev/display.h"

#include "../dev/rtcsim.h"

/* Our system will need some pipes to handle ... life.  How about these:

 *

 *      rxpipe  - read()s from this pipe read from the UART

 *                      Interrupt fed

 *      txpipe  - write()s to this pipe write to the UART

 *                      Interrupt consumed

 *      keypipe - read()s from this pipe return values read by the keypad

 *      lcdpipe - write()s to this pipe write to the LCD display SPI port

 *      pwmpipe - write()s to this pipe will send values to the audio port

 *                      Interrupt consumed

 *      cmdpipe - written to by the user command task, read by the display task

 *              used to communicate menu status

 *

 */

/* We'll need some tasks as well:

 *      User command task

 *              Handles user interaction

 *                      Reads from pipe--either the keypad or the UARTRX pipe

 *                      (Might be two such tasks in the system, one for each.)

 *              Sets clock upon request

 *              Reads from a pipe (rxpipe or keypipe), Writes to the txpipe pipe

 *      Doorbell task

 *              Maintains system time on the clock      : TIME: HH:MM:SS

 *              Maintains system status on display      : Light is (dis/en)abled

 *              Transitions when the doorbell is rung to: (fixed time line)

 *                                                      : DOORBELL!!

 *              When the doorbell is clear, returns to the original task.

 *              ---

 *              Waits on events, writes to the lcdpipe and pwmpipe.

 *              Reads from a command pipe, so that it can handle any user menu's

 *                      Command pipe.  This, though, is tricky.  It requires

 *                      a task that can be interrupted by either an event or a

 *                      pipe.  Blocking is going to be more tricky ...

 *      Keypad task

 *              Normally, you might think this should be an interrupt task.

 *              But, it needs state in order to have timeouts and to debounce

 *              the input pin.  So ... let's leave this as a task.

 *              ---

 *              Waits on events(keypad/timer), writes to the keypipe

 *      Display task

 *              The display does *not* need to be written to at an interrupt

 *              level.  It really needs to be written to at a task level, so

 *              let's make a display task.

 *              ---

 *              Reads from the lcdpipe

 *      Real-time Clock Task

 *              Gets called once per second to update the real-time clock

 *              and to post those updates as an event to other tasks that might

 *              be interested in it.

 *              ---

 *              Waits on system tasks, uses two semaphores

 */

/*

 * Read the keypad, write the results to an output pipe

 */

// #define      KEYPAD_TASK     keypad_task_id

/*

 * Maintain a realtime clock

 */

#define RTCCLOCK_TASK   rtccclock_task_id

/*

 * Read from an incoming pipe, write results to the SPI port controlling the

 * display.

 */

#define DISPLAY_TASK    display_task_id

/*

 * Wait for a button press, and then based upon the clock set a light

 */

#define DOORBELL_TASK   doorbell_task_id

/*

 * Interract with any user commands, such as setting the clock, setting

 * nighttime (when the lights turn on) or setting daytime when only the

 * doorbell rings.

 */

// #define      COMMAND_TASK    command_task_id

#define LAST_TASK       last_task_id

typedef enum    {

#ifdef  RTCCLOCK_TASK

        RTCCLOCK_TASK,

#endif

#ifdef  DOORBELL_TASK

#ifdef  DISPLAY_TASK

        DOORBELL_TASK, DISPLAY_TASK,

#endif

#endif

#ifdef  KEYPAD_TASK

        KEYPAD_TASK,

#endif

#ifdef  COMMAND_TASK

        COMMAND_TASK,

#endif

        LAST_TASK

} TASKNAME;

void    rtctask(void),

        doorbell_task(void),

        display_task(void),

        keypad_task(void),

        command_task(void);

        // idle_task ... is accomplished within the kernel

extern  void    restore_context(int *), save_context(int *);

extern  SYSPIPE *rxpipe, *txpipe, *pwmpipe, *lcdpipe;

SYSPIPE *midpipe;

extern  KDEVICE *pipedev;

int     kntasks(void) {

        return LAST_TASK;

} void  kinit(TASKP *tasklist) {

#ifdef  RTCCLOCK_TASK

        //

        tasklist[RTCCLOCK_TASK]    = new_task(16, rtctask);

#endif

#ifdef  DOORBELL_TASK

#ifdef  DISPLAY_TASK

        //

        tasklist[DOORBELL_TASK]    = new_task(64, doorbell_task);

        tasklist[DOORBELL_TASK]->fd[FILENO_STDOUT] = sys_malloc(sizeof(KFILDES));

                tasklist[DOORBELL_TASK]->fd[FILENO_STDOUT]->id = (int)lcdpipe;

                tasklist[DOORBELL_TASK]->fd[FILENO_STDOUT]->dev= pipedev;

        tasklist[DOORBELL_TASK]->fd[FILENO_AUX] = sys_malloc(sizeof(KFILDES));

                tasklist[DOORBELL_TASK]->fd[FILENO_AUX]->id = (int)pwmpipe;

                tasklist[DOORBELL_TASK]->fd[FILENO_AUX]->dev= pipedev;

        //

        tasklist[DISPLAY_TASK] = new_task(32, display_task);

        tasklist[DISPLAY_TASK]->fd[FILENO_STDIN] = sys_malloc(sizeof(KFILDES));

                tasklist[DISPLAY_TASK]->fd[FILENO_STDIN]->id = (int)lcdpipe;

                tasklist[DISPLAY_TASK]->fd[FILENO_STDIN]->dev= pipedev;

#endif

#endif

#ifdef  KEYPAD_TASK

        tasklist[KEYPAD_TASK]    = new_task(16, keypad_task);

        tasklist[KEYPAD_TASK]->fd[FILENO_STDOUT] = sys_malloc(sizeof(KFILDES));

                tasklist[NMEA_TASK]->fd[FILENO_STDOUT]->id = (int)keypipe;

                tasklist[NMEA_TASK]->fd[FILENO_STDOUT]->dev= pipedev;

#endif

}

#ifdef DOORBELL_TASK

// #define      HALF_HOUR_S     1800    // Seconds per half hour

// #define      HALF_HOUR_S     180     // Seconds per three minutes--for test

#define HALF_HOUR_S     30      // 3 Mins is to long, here's 3 seconds

#include "../dev/samples.c"

const unsigned  dawn = 0x060000, dusk = 0x180000;

void    shownow(unsigned now) { // Uses 10 stack slots + 8 for write()

        char    dmsg[9];

        dmsg[0] = PACK(0x1b,'[','j','T');

        dmsg[1] = PACK('i','m','e',':');

        dmsg[2] = PACK(' ',((now>>20)&0x3)+'0',

                        ((now>>16)&0xf)+'0',':');

        dmsg[3] = PACK( ((now>>12)&0xf)+'0',

                        ((now>> 8)&0xf)+'0',

                        ':',

                        ((now>> 4)&0xf)+'0');

        dmsg[4] = PACK( ((now    )&0xf)+'0',

                        0x1b, '[', '1');

        dmsg[5] = PACK(';','0','H',' ');

        if ((now < dawn)||(now > dusk)) {

                dmsg[6] = PACK('N','i','g','h');

                dmsg[7] = PACK('t',' ','t','i');

                dmsg[8] = PACK('m','e',0,0);

        } else {

                dmsg[6] = PACK('D','a','y','l');

                dmsg[7] = PACK('i','g','h','t');

                dmsg[8] = PACK('!',' ',0,0);

        } write(FILENO_STDOUT, dmsg, 9);

}

void    showbell(unsigned now) {        // Uses 10 stack slots + 8 for write()

        char    dmsg[9];

        dmsg[0] = PACK(0x1b,'[','j','T');

        dmsg[1] = PACK('i','m','e',':');

        dmsg[2] = PACK(' ',((now>>20)&0x3)+'0',

                        ((now>>16)&0xf)+'0',':');

        dmsg[3] = PACK( ((now>>12)&0xf)+'0',

                        ((now>> 8)&0xf)+'0',

                        ':',

                        ((now>> 4)&0xf)+'0');

        dmsg[4] = PACK( ((now    )&0xf)+'0',

                        0x1b, '[', '1');

        dmsg[5] = PACK(';','0','H',' ');

        dmsg[6] = PACK('D','o','o','r');

        dmsg[7] = PACK('b','e','l','l');

        dmsg[8] = PACK('!',' ',0,0);

        write(FILENO_STDOUT, dmsg, 9);

}

void    belllight(unsigned now) {

        IOSPACE *sys = (IOSPACE *)IOADDR;

        if ((now < dawn)||(now > dusk))

                sys->io_spio = 0x088; // Turn our light on

        else

                sys->io_spio = 0x80; // Turn light off

}

void    doorbell_task(void) {

        // Controls LED 0x08

        // Start by initializing the display to GT Gisselquist\nTechnology

        // write(KFD_STDOUT, disp_build_backslash,sizeof(disp_build_backslash));

        // write(KFD_STDOUT, disp_build_gtlogo, sizeof(disp_build_gtlogo));

        // write(KFD_STDOUT, disp_reset_data, sizeof(disp_reset_data));

        // write(KFD_STDOUT, disp_gtech_data, sizeof(disp_gtech_data));

        IOSPACE *sys = (IOSPACE *)IOADDR;

        while(1) {

                int     event;

                // Initial state: doorbell is not ringing.  In this state, we

                // can wait forever for an event

                sys->io_spio = 0x080; // Turn our light off

                event = wait(INT_BUTTON|SWINT_PPS,-1);

                unsigned when = rtcclock;

                if (event & INT_BUTTON)

                        showbell(when);

                else if (event & SWINT_PPS)

                        shownow(when);

                while(event & INT_BUTTON) {

                        // Next state, the button has been pressed, the

                        // doorbell is ringing

                        // Seconds records the number of seconds since the

                        // button was last pressed.

                        int     seconds = 0;

                        // Check time: should we turn our light on or not?

                        belllight(rtcclock);

                        const int *sptr = sound_data;

                        sys->io_uart = 'N';

                        while(sptr < &sound_data[NSAMPLE_WORDS]) {

                                int     len = &sound_data[NSAMPLE_WORDS]-sptr;

                                if (len > 256)

                                        len = 256;

                                // We stall here, if the audio FIFO is full

                                write(FILENO_AUX, sptr, len);

                                sptr += len;

                                // If the user presses the button more than

                                // once, we start the sound over as well as

                                // our light counter.

                                event = wait(INT_BUTTON|SWINT_PPS, 0);

                                if (event&INT_BUTTON) {

                                        if (sptr > &sound_data[2048]) {

                                                sptr = sound_data;

                                                seconds = 0;

                                                when = (volatile unsigned)rtcclock;

                                                showbell(when);

                                        }

                                } else if (event&SWINT_PPS) {

                                        seconds++;

                                        belllight(rtcclock);

                                        showbell(when);

                                }

                        }

                        sys->io_uart = 'D';

                        // Next state: the doorbell is no longer ringing, but

                        // we have yet to return to normal--the light is still

                        // on.

                        while((seconds < HALF_HOUR_S)&&

                                (((event=wait(INT_BUTTON|SWINT_PPS,-1))&INT_BUTTON)==0)) {

                                seconds++;

                                belllight(rtcclock);

                                showbell(when);

                        }

                        if (event&INT_BUTTON) {

                                when = (volatile unsigned)rtcclock;

                                showbell(when);

                                sys->io_uart = 'S';

                        }

                }

        }

}

#endif