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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 <avr/delay.h>

#include "max7456_software_spi.h"

#include "config.h"

#include "main.h"

#include "buttons.h"

#include "usart1.h"

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;

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

// video modes

const char VM_PAL[] PROGMEM = "PAL ";

const char VM_NTSC[] PROGMEM = "NTSC";

const displaymode_t * mode;

#endif

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

		if (verbose) write_ascii_string_pgm(2, 9, ee_msg[0]); // Loading data

		#endif

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

		if (verbose) write_ascii_string_pgm(2, 9, ee_msg[1]); // Loading data

		#endif

	}

}

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

/**

 * 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