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/****************************************************************************
 *   Copyright (C) 2009-2010 by Claas Anders "CaScAdE" Rathje               *
 *   admiralcascade@gmail.com                                               *
 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
 *                                                                          *
 *   This program 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 2 of the License.         *
 *                                                                          *
 *   This program 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, write to the                          *
 *   Free Software Foundation, Inc.,                                        *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
 ****************************************************************************/


#include <avr/io.h>
#include <avr/eeprom.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "max7456_software_spi.h"
#include "config.h"
#include "main.h"
#include "buttons.h"
#include "usart1.h"

#if !(ALLCHARSDEBUG|(WRITECHARS != -1))

uint8_t EEMEM ee_checkbyte1 = CHECKBYTE1;
uint8_t EEMEM ee_checkbyte2 = CHECKBYTE2;
uint8_t EEMEM ee_COSD_FLAGS_MODES = 0;
uint8_t EEMEM ee_COSD_FLAGS_CONFIG = 0;
uint8_t EEMEM ee_COSD_DISPLAYMODE = 0;

// video modes
const char VM_PAL[] PROGMEM = "PAL ";
const char VM_NTSC[] PROGMEM = "NTSC";

const displaymode_t * mode;

const char ee_message0[] PROGMEM = "Loading Data from EEPROM";
const char ee_message1[] PROGMEM = "No saved Data in EEPROM";
const char* ee_msg[] PROGMEM = {ee_message0, ee_message1};

/**
 * read data saved in eeprom, print out message if <verbose> is set
 */

void get_eeprom(uint8_t verbose) {
    if (eeprom_read_byte(&ee_checkbyte1) == CHECKBYTE1 && eeprom_read_byte(&ee_checkbyte2) == CHECKBYTE2) {
        if (verbose) write_ascii_string_pgm(2, 9, ee_msg[0]); // Loading data
        COSD_FLAGS_MODES = eeprom_read_byte(&ee_COSD_FLAGS_MODES);
        COSD_FLAGS_CONFIG = eeprom_read_byte(&ee_COSD_FLAGS_CONFIG);
        COSD_DISPLAYMODE = eeprom_read_byte(&ee_COSD_DISPLAYMODE);
        //if (verbose) write_ndigit_number_u(23, 11, COSD_DISPLAYMODE, 2, 0);
    } else {
        if (verbose) write_ascii_string_pgm(2, 9, ee_msg[1]); // Loading data
    }
}


/**
 * save data to eeprom
 */

void save_eeprom() {
    eeprom_write_byte(&ee_checkbyte1, CHECKBYTE1);
    eeprom_write_byte(&ee_checkbyte2, CHECKBYTE2);
    eeprom_write_byte(&ee_COSD_FLAGS_MODES, COSD_FLAGS_MODES);
    eeprom_write_byte(&ee_COSD_FLAGS_CONFIG, COSD_FLAGS_CONFIG);
    eeprom_write_byte(&ee_COSD_DISPLAYMODE, COSD_DISPLAYMODE);
}

/**
 * auto config some stuff on startup, currently only battery cells
 */

void init_cosd(uint8_t UBat) {
    clear();
    write_ascii_string_pgm(2, 1, PSTR("C-OSD Initialisation")); // C-OSD Initialisation
#if FCONLY
    write_ascii_string_pgm(2, 2, PSTR("FC only Mode")); // FC only mode
#else
    write_ascii_string_pgm(2, 2, PSTR("NaviCtrl Mode")); // NaviCtrl Mode
#endif
    write_ascii_string_pgm(2, 3, PSTR(BUILDDATE));
    uint8_t cellnum = 0;
    if (CELL_NUM == -1) {
        write_ascii_string_pgm(2, 4, PSTR("Guessing Number of Cells")); // Guessing Number of Cells
        do {
            cellnum++;
        } while (UBat > ((cellnum * CELL_VOLT_MAX) + 23));
    } else {
        cellnum = CELL_NUM;
    }
    min_voltage = cellnum * CELL_VOLT_MIN;
    max_voltage = cellnum * CELL_VOLT_MAX;
    write_ascii_string_pgm(2, 5, PSTR("Number of Cells:")); // Number of Cells
    write_ndigit_number_u(21, 5, cellnum, 1, 0);
    write_ascii_string_pgm(2, 6, PSTR("Warn Voltage   :")); // Warn Voltage
    write_ndigit_number_s_10th(20, 6, min_voltage, 3, 0);
    write_ascii_string_pgm(2, 7, PSTR("Max Voltage    :")); // Max Voltage
    write_ndigit_number_s_10th(20, 7, max_voltage, 3, 0);

    get_eeprom(1);

    //write_ascii_string_pgm(23, 2, vm[COSD_FLAGS & COSD_FLAG_NTSC]);
    if (COSD_FLAGS_CONFIG & COSD_FLAG_NTSC) {
        write_ascii_string_pgm(23, 2, VM_NTSC);
    } else {
        write_ascii_string_pgm(23, 2, VM_PAL);
    }

    // request version from board
    rxd_buffer_locked = 0;
    usart1_EnableTXD();
#if FCONLY
    //usart1_request_mk_data(0, 'v', 0);
    write_ascii_string_pgm(2, 11, PSTR("FC VERSION: ........"));
    usart1_puts_pgm(PSTR(REQUEST_FC_VERSION));
#else
    //usart1_request_mk_data(1, 'v', 0);
    usart1_puts_pgm(PSTR(REQUEST_NC_VERSION));
    write_ascii_string_pgm(2, 11, PSTR("NC VERSION: ........"));
#endif
    usart1_DisableTXD();
    // wait for response
    while (rxd_buffer_locked == 0) {
        asm("nop");
    }
    Decode64();
    str_VersionInfo VersionInfo;
    VersionInfo = *((str_VersionInfo*)pRxData);

    write_ndigit_number_u(14, 11, VersionInfo.SWMajor, 3, 1);
    write_ndigit_number_u(18, 11, VersionInfo.SWMinor, 3, 1);
    write_ascii_char(22 + 11 * 30, 'a' + VersionInfo.SWPatch);
    // end version request


#if FCONLY
    COSD_DISPLAYMODE %= (sizeof (fcdisplaymodes) / sizeof (displaymode_t));
    mode = fcdisplaymodes;
    mode += COSD_DISPLAYMODE;
    osd_fcmode = (int(*)(void)) pgm_read_word(&mode->dfun);
    // re-request data ever 100ms from FC;
    //usart1_request_mk_data(0, 'd', 100);
#else
    COSD_DISPLAYMODE %= (sizeof (ncdisplaymodes) / sizeof (displaymode_t));
    mode = ncdisplaymodes;
    mode += COSD_DISPLAYMODE;
    osd_ncmode = (int(*)(void)) pgm_read_word(&mode->dfun);
    // re-request OSD Data from NC every 100ms
    //usart1_request_mk_data(1, 'o', 100);
#endif

    _delay_ms(3000);
    clear();
    // update flags to paint display again because of clear
    COSD_FLAGS_RUNTIME &= ~COSD_ICONS_WRITTEN;
}

/* ##########################################################################
 * A simple config menu for the flags
 * ##########################################################################*/


/**
 * helper function for flag display
 */

void onoff(uint8_t col, uint8_t line, uint8_t onoff) {
    if (onoff) {
        write_ascii_string_pgm(col, line, PSTR("ON "));
    } else {
        write_ascii_string_pgm(col, line, PSTR("OFF"));
    }
}

/**
 * helper function for menu updating
 */

void config_menu_drawings(uint8_t chosen) {
    static uint8_t old_y = 0;
    uint8_t x = MENU_LEFT, y = MENU_TOP, line = MENU_TOP;

    if (chosen > 5 && chosen < 12) { // right
        x = MENU_MIDDLE;
        y = chosen - 6 + MENU_TOP;
    } else if (chosen < 7) {
        y = chosen + MENU_TOP;
    } else {
        y = chosen - 6 + MENU_TOP;
    }

    // clear prevoius _cursor_ and draw current
    for (uint8_t myx = MENU_LEFT; myx < 29; myx++) {
        write_char_att_xy(myx, old_y, 0);
        if (myx > x - 1 && myx < x + 14) {
            write_char_att_xy(myx, y, BLACKBG | INVERT);
        }
    };

    write_ascii_string_pgm(MENU_LEFT, line, PSTR("Video"));
    if (COSD_FLAGS_CONFIG & COSD_FLAG_NTSC) {
        write_ascii_string_pgm(MENU_LEFT + 10, line, VM_NTSC);
    } else {
        write_ascii_string_pgm(MENU_LEFT + 10, line, VM_PAL);
    }

    write_ascii_string_pgm(MENU_LEFT, ++line, PSTR("Full HUD"));
    onoff(MENU_LEFT + 10, line, COSD_FLAGS_MODES & COSD_FLAG_HUD);

    write_ascii_string_pgm(MENU_LEFT, ++line, PSTR("Horizon"));
    onoff(MENU_LEFT + 10, line, COSD_FLAGS_MODES & COSD_FLAG_ARTHORIZON);

    write_ascii_string_pgm(MENU_LEFT, ++line, PSTR("Aggr.Hor."));
    onoff(MENU_LEFT + 10, line, COSD_FLAGS_MODES & COSD_FLAG_AGGRHORIZON);

    write_ascii_string_pgm(MENU_LEFT, ++line, PSTR("Stats"));
    onoff(MENU_LEFT + 10, line, COSD_FLAGS_MODES & COSD_FLAG_STATS);

    write_ascii_string_pgm(MENU_LEFT, ++line, PSTR("A by FC"));
    onoff(MENU_LEFT + 10, line, COSD_FLAGS_MODES & COSD_FLAG_FCCURRENT);

    // 2nd col
    line = 2;

    write_ascii_string_pgm(MENU_MIDDLE, line, PSTR("V C-Strom"));
    onoff(MENU_MIDDLE + 10, line, COSD_FLAGS_MODES & COSD_FLAG_STROMVOLT);

    write_ascii_string_pgm(MENU_MIDDLE, ++line, PSTR("Height by"));
    if (COSD_FLAGS_CONFIG & COSD_FLAG_GPSHEIGHT) {
        write_ascii_string_pgm(MENU_MIDDLE + 10, line, PSTR(" GPS"));
    } else {
        write_ascii_string_pgm(MENU_MIDDLE + 10, line, PSTR("BARO"));
    }

    write_ascii_string_pgm(MENU_MIDDLE, ++line, PSTR("Feet/mph"));
    onoff(MENU_MIDDLE + 10, line, COSD_FLAGS_CONFIG & COSD_FLAG_FEET);

    write_ascii_string_pgm(MENU_MIDDLE, ++line, PSTR("Big Vario"));
    onoff(MENU_MIDDLE + 10, line, COSD_FLAGS_MODES & COSD_FLAG_BIGVARIO);


    // bottom
    write_ascii_string_pgm(MENU_LEFT, 9, PSTR("Reset uptime"));

    write_ascii_string_pgm(MENU_LEFT, 10, PSTR("Display Mode"));
    write_ascii_string_pgm(18, 10, (const char *)(pgm_read_word(&(mode->desc))));

    write_ascii_string_pgm(MENU_LEFT, 11, PSTR("Save config"));
    write_ascii_string_pgm(MENU_LEFT, 12, PSTR("EXIT"));

    old_y = y;
}

/**
 * some sort of clicking response in the menu
 */

void config_menu_doclick(uint8_t chosen) {
    write_ascii_string_pgm(MENU_LEFT, chosen + MENU_TOP - 6, PSTR("DONE              "));
    _delay_ms(500);
    config_menu_drawings(chosen);
}

/**
 * a simple config menu tryout
 */

void config_menu(void) {
    // disable interrupts (makes the menu more smoothely)
    cli();

    // clear screen
    clear();

    uint8_t chosen = 0;
    uint8_t inmenu = 1;
    write_ascii_string_pgm(6, 1, PSTR("C-OSD Config Menu"));

    // wait a bit before doing stuff so user has chance to release button
    _delay_ms(250);

    config_menu_drawings(chosen);

    while (inmenu) {
        if (s2_pressed()) {
            chosen = (chosen + 1) % 17;
            if (chosen == 10) chosen = 13; // SKIP unused menu space for now
            config_menu_drawings(chosen);
            _delay_ms(500);
        } else if (s1_pressed()) {
            switch (chosen) {
                case 0: // NTSC or PAL
                    COSD_FLAGS_CONFIG ^= COSD_FLAG_NTSC;
                    // Setup Video Mode
                    if (COSD_FLAGS_CONFIG & COSD_FLAG_NTSC) {
                        // NTSC + enable display immediately (VM0)
                        spi_send_byte(0x00, 0b00001000);

                        bottom_line = 12;
                    } else {
                        // PAL + enable display immediately (VM0)
                        spi_send_byte(0x00, 0b01001000);

                        bottom_line = 14;
                    }
                    break;
                case 1: // full HUD
                    COSD_FLAGS_MODES ^= COSD_FLAG_HUD;
                    break;
                case 2: // art horizon
                    COSD_FLAGS_MODES ^= COSD_FLAG_ARTHORIZON;
                    break;
                case 3: // aggressiva horizon
                    COSD_FLAGS_MODES ^= COSD_FLAG_AGGRHORIZON;
                    break;
                case 4: // statistics
                    COSD_FLAGS_MODES ^= COSD_FLAG_STATS;
                    break;
                case 5: // current by fc
                    COSD_FLAGS_MODES ^= COSD_FLAG_FCCURRENT;
                    break;
                case 6: // 2nd voltage by c-strom
                    COSD_FLAGS_MODES ^= COSD_FLAG_STROMVOLT;
                    break;
                case 7: // GPS or BARO height
                    COSD_FLAGS_CONFIG ^= COSD_FLAG_GPSHEIGHT;
                    break;
                case 8: // Feet and mph?
                    COSD_FLAGS_CONFIG ^= COSD_FLAG_FEET;
                    break;
                case 9: // big vario
                    COSD_FLAGS_MODES ^= COSD_FLAG_BIGVARIO;
                    break;
                case 13: // reset uptime
                    uptime = 0;
                    config_menu_doclick(chosen);
                    break;
                case 14: // change mode
#if FCONLY
                    COSD_DISPLAYMODE = (COSD_DISPLAYMODE + 1) % (sizeof (fcdisplaymodes) / sizeof (displaymode_t));
                    mode = fcdisplaymodes;
                    mode += COSD_DISPLAYMODE;
                    osd_fcmode = (int(*)(void)) pgm_read_word(&mode->dfun);
#else
                    COSD_DISPLAYMODE = (COSD_DISPLAYMODE + 1) % (sizeof (ncdisplaymodes) / sizeof (displaymode_t));
                    mode = ncdisplaymodes;
                    mode += COSD_DISPLAYMODE;
                    osd_ncmode = (int(*)(void)) pgm_read_word(&mode->dfun);
#endif
                    break;
                case 15: // save
                    save_eeprom();
                    config_menu_doclick(chosen);
                    break;
                case 16: // exit
                    inmenu = 0;
                    config_menu_doclick(chosen);
                    break;
            }
            config_menu_drawings(chosen);
            _delay_ms(250);
        }
    }

    // clear screen up again
    clear();

    // update flags to paint display again if needed
    COSD_FLAGS_RUNTIME &= ~COSD_ICONS_WRITTEN;

    // enable interrupts again
    sei();
}

#endif