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/****************************************************************************
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 *   Copyright (C) 2009 by Claas Anders "CaScAdE" Rathje                    *
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 *   admiralcascade@gmail.com                                               *
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 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
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 *                                                                          *
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 *   This program is free software; you can redistribute it and/or modify   *
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 *   it under the terms of the GNU General Public License as published by   *
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 *   the Free Software Foundation; either version 2 of the License.         *
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 *                                                                          *
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 *   This program is distributed in the hope that it will be useful,        *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
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 *   GNU General Public License for more details.                           *
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 *                                                                          *
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 *   You should have received a copy of the GNU General Public License      *
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 *   along with this program; if not, write to the                          *
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 *   Free Software Foundation, Inc.,                                        *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
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 ****************************************************************************/
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// write icons at init or after menu/mode-switch
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if (!(COSD_FLAGS & COSD_ICONS_WRITTEN)) {
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    write_char_xy(5, top_line, 0xCB); // km/h
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    write_char_xy(10, top_line, 0xCA); // RC-transmitter
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    write_char_xy(16, top_line, 0xD0); // degree symbol
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    write_char_xy(27, top_line, 0xCC); // small meters m height
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    write_char_xy(20, top_line + 1, 0xB0); // left circle
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    write_char_xy(22, top_line + 1, 0xB2); // right circle
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    write_char_xy(27, top_line + 1, 0xCC); // small meters m home
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    write_char_xy(7, bottom_line, 0x9E); // small v
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    write_char_xy(14, bottom_line, 0xD1); // on clock
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    write_char_xy(21, bottom_line, 0xD2); // fly clock
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    write_char_xy(26, bottom_line, 0xC8); // sat1
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    write_char_xy(27, bottom_line, 0xC9); // sat2
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        COSD_FLAGS |= COSD_ICONS_WRITTEN;
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}
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// first line
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write_ndigit_number_u(2, top_line, (uint16_t) (((uint32_t) naviData.GroundSpeed * (uint32_t) 9) / (uint32_t) 250), 100, 0);
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write_ndigit_number_u(7, top_line, naviData.RC_Quality, 100, 0);
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if (naviData.RC_Quality <= RCLVL_WRN && last_RC_Quality > RCLVL_WRN) {
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    for (uint8_t x = 0; x < 4; x++)
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        write_char_att_xy(7 + x, top_line, BLINK);
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} else if (naviData.RC_Quality > RCLVL_WRN && last_RC_Quality <= RCLVL_WRN) {
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    for (uint8_t x = 0; x < 4; x++)
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        write_char_att_xy(7 + x, top_line, 0);
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}
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last_RC_Quality = naviData.RC_Quality;
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if (naviData.NCFlags & NC_FLAG_NOSERIALLINK) {
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    write_char_xy(11, top_line, 0); // clear
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} else {
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    write_char_xy(11, top_line, 0xC6); // PC icon
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}
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write_ndigit_number_u(13, top_line, naviData.CompassHeading, 100, 0);
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write_ascii_string(17, top_line, directions[heading_conv(naviData.CompassHeading)]);
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draw_variometer(21, top_line, naviData.Variometer);
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//note:lephisto:according to several sources it's /30
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if (naviData.Altimeter > 300 || naviData.Altimeter < -300) {
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    // above 10m only write full meters
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    write_ndigit_number_s(23, top_line, naviData.Altimeter / 30, 1000, 0);
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} else {
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    // up to 10m write meters.dm
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    //write_number_u_10th(21, top_line, naviData.Altimeter / 3);
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    write_ndigit_number_s_10th(23, top_line, naviData.Altimeter / 3, 100, 0);
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}
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// seccond line
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draw_compass(11, top_line + 1, naviData.CompassHeading);
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// TODO: verify correctness
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uint16_t heading_home = (naviData.HomePositionDeviation.Bearing + 360 - naviData.CompassHeading) % 360;
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//write_char_xy(21, top_line + 1, arrowdir[heading_conv(heading_home)]);
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// finer resolution, 0xa0 is first character and we add the index 0 <= index < 16
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write_char_xy(21, top_line + 1, 0xa0 + heading_fine_conv(heading_home));
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write_ndigit_number_u(24, top_line + 1, naviData.HomePositionDeviation.Distance / 10, 100, 0);
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// center
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if (naviData.MKFlags & FLAG_MOTOR_RUN) { // should be engines running
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    if (!(old_MKFlags & FLAG_MOTOR_RUN)) { // motors just started, clear middle
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        clear();
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        // update flags to paint display again if needed
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        COSD_FLAGS &= ~COSD_ICONS_WRITTEN;
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    }
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    if (COSD_FLAGS & COSD_FLAG_ARTHORIZON) {
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        draw_artificial_horizon(top_line + 2, bottom_line - 1, naviData.AngleNick, naviData.AngleRoll);
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    }
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    // motors are on, assume we were/are flying
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    COSD_FLAGS |= COSD_WASFLYING;
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} else {
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    // stats
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    if ((COSD_FLAGS & COSD_WASFLYING) && (COSD_FLAGS & COSD_FLAG_STATS)) {
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        write_ascii_string_pgm(2, 4, stats_item_pointers[0]); // max Altitude
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        write_ndigit_number_s(18, 4, max_Altimeter / 30, 1000, 0);
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        write_char_xy(22, 4, 204); // small meters m
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        write_ascii_string_pgm(2, 5, stats_item_pointers[1]); // max Speed
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        write_ndigit_number_u(19, 5, (uint16_t) (((uint32_t) max_GroundSpeed * (uint32_t) 9) / (uint32_t) 250), 100, 0);
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        write_char_xy(22, 5, 203); // km/h
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        write_ascii_string_pgm(2, 6, stats_item_pointers[2]); // max Distance
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        write_ndigit_number_u(19, 6, max_Distance / 10, 100, 0);
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        write_char_xy(22, 6, 204); // small meters m
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        write_ascii_string_pgm(2, 7, stats_item_pointers[3]); // min voltage
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        write_ndigit_number_u_10th(18, 7, min_UBat, 100, 0);
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        write_char_xy(22, 7, 0x9E); // small v
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        write_ascii_string_pgm(2, 8, stats_item_pointers[4]); // max time
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        write_time(16, 8, max_FlyingTime);
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        write_char_xy(22, 8, 210); // fly clock
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        write_ascii_string_pgm(2, 9, stats_item_pointers[5]); // longitude
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        write_gps_pos(15, 9, naviData.CurrentPosition.Longitude);
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        write_ascii_string_pgm(2, 10, stats_item_pointers[6]); // latitude
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        write_gps_pos(15, 10, naviData.CurrentPosition.Latitude);
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    } else if (COSD_FLAGS & COSD_FLAG_ARTHORIZON) { // if no stats there is space horizon
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        draw_artificial_horizon(top_line + 2, bottom_line - 1, naviData.AngleNick, naviData.AngleRoll);
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    }
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}
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if (COSD_FLAGS & COSD_FLAG_BIGVARIO) {
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    draw_big_variometer(27, 8, naviData.Variometer);
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}
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// bottom line
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draw_battery(2, bottom_line, min_voltage, naviData.UBat, max_voltage);
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write_ndigit_number_u_10th(3, bottom_line, naviData.UBat, 100, 0);
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if (naviData.UBat <= min_voltage && last_UBat > min_voltage) {
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    for (uint8_t x = 2; x < 8; x++)
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        write_char_att_xy(x, bottom_line, BLINK);
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} else if (naviData.UBat > min_voltage && last_UBat < min_voltage) {
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    for (uint8_t x = 2; x < 8; x++)
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        write_char_att_xy(x, bottom_line, 0);
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}
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// remember last values
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last_UBat = naviData.UBat;
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write_time(8, bottom_line, uptime);
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write_time(15, bottom_line, naviData.FlyingTime);
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write_ndigit_number_u(24, bottom_line, naviData.SatsInUse, 10, 0);
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if (naviData.NCFlags & NC_FLAG_MANUAL_CONTROL) {
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    write_char_xy(23, bottom_line, 0xB3); // rc transmitter
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} else {
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    write_char_xy(23, bottom_line, 0); // clear
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}
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if (naviData.NCFlags & NC_FLAG_CH) {
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    write_char_xy(27, bottom_line, 231); // gps ch
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} else if (naviData.NCFlags & NC_FLAG_PH) {
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    write_char_xy(27, bottom_line, 230); // gps ph
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} else { // (naviData.NCFlags & NC_FLAG_FREE)
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    write_char_xy(27, bottom_line, 201); // sat2 (free)
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}
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//write_number_s(8, 5, RxDataLen);
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//write_number_s(16, 5, setsReceived++);
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// remember statistics (only when engines running)
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if (naviData.MKFlags & FLAG_MOTOR_RUN) {
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    if (naviData.Altimeter > max_Altimeter) max_Altimeter = naviData.Altimeter;
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    if (naviData.GroundSpeed > max_GroundSpeed) max_GroundSpeed = naviData.GroundSpeed;
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    if (naviData.HomePositionDeviation.Distance > max_Distance) {
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        max_Distance = naviData.HomePositionDeviation.Distance;
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    }
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    if (naviData.UBat < min_UBat) min_UBat = naviData.UBat;
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    if (naviData.FlyingTime > max_FlyingTime) max_FlyingTime = naviData.FlyingTime;
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}
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old_MKFlags = naviData.MKFlags;
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seconds_since_last_data = 0;
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