src/main/drivers/display.h

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #pragma once
  22
  23 #define VIDEO_COLUMNS_SD          30
  24 #define VIDEO_LINES_NTSC          13
  25 #define VIDEO_LINES_PAL           16
  26
  27 typedef enum {
  28     DISPLAYPORT_DEVICE_TYPE_MAX7456 = 0,
  29     DISPLAYPORT_DEVICE_TYPE_OLED,
  30     DISPLAYPORT_DEVICE_TYPE_MSP,
  31     DISPLAYPORT_DEVICE_TYPE_FRSKYOSD,
  32     DISPLAYPORT_DEVICE_TYPE_CRSF,
  33     DISPLAYPORT_DEVICE_TYPE_HOTT,
  34     DISPLAYPORT_DEVICE_TYPE_SRXL,
  35 } displayPortDeviceType_e;
  36
  37 typedef enum {
  38     DISPLAYPORT_SEVERITY_NORMAL = 0,
  39     DISPLAYPORT_SEVERITY_INFO,
  40     DISPLAYPORT_SEVERITY_WARNING,
  41     DISPLAYPORT_SEVERITY_CRITICAL,
  42     DISPLAYPORT_SEVERITY_COUNT,
  43 } displayPortSeverity_e;
  44
  45 #define DISPLAYPORT_BLINK  0x80 // Device local blink bit or'ed into displayPortSeverity_e
  46
  47 // System elements rendered by VTX or Goggles
  48 typedef enum {
  49     DISPLAYPORT_SYS_GOGGLE_VOLTAGE = 0,
  50     DISPLAYPORT_SYS_VTX_VOLTAGE = 1,
  51     DISPLAYPORT_SYS_BITRATE = 2,
  52     DISPLAYPORT_SYS_DELAY = 3,
  53     DISPLAYPORT_SYS_DISTANCE = 4,
  54     DISPLAYPORT_SYS_LQ = 5,
  55     DISPLAYPORT_SYS_GOGGLE_DVR = 6,
  56     DISPLAYPORT_SYS_VTX_DVR = 7,
  57     DISPLAYPORT_SYS_WARNINGS = 8,
  58     DISPLAYPORT_SYS_VTX_TEMP = 9,
  59     DISPLAYPORT_SYS_FAN_SPEED = 10,
  60     DISPLAYPORT_SYS_COUNT,
  61 } displayPortSystemElement_e;
  62
  63 typedef enum {
  64     DISPLAYPORT_LAYER_FOREGROUND,
  65     DISPLAYPORT_LAYER_BACKGROUND,
  66     DISPLAYPORT_LAYER_COUNT,
  67 } displayPortLayer_e;
  68
  69 typedef enum {
  70     DISPLAY_TRANSACTION_OPT_NONE = 0,
  71     DISPLAY_TRANSACTION_OPT_PROFILED = 1 << 0,
  72     DISPLAY_TRANSACTION_OPT_RESET_DRAWING = 1 << 1,
  73 } displayTransactionOption_e;
  74
  75 typedef enum {
  76     DISPLAY_BACKGROUND_TRANSPARENT,
  77     DISPLAY_BACKGROUND_BLACK,
  78     DISPLAY_BACKGROUND_GRAY,
  79     DISPLAY_BACKGROUND_LTGRAY,
  80     DISPLAY_BACKGROUND_COUNT    // must be the last entry
  81 } displayPortBackground_e;
  82
  83 typedef enum {
  84     // Display drivers that can perform screen clearing in the background, e.g. via DMA, should do so.
  85     // use `displayCheckReady` function to check if the screen clear has been completed.
  86     DISPLAY_CLEAR_NONE = 0,
  87
  88     // * when set, the display driver should block until the screen clear has completed, use in synchronous cases
  89     //   only, e.g. where the screen is cleared and the display is immediately drawn to.
  90     // * when NOT set, return immediately and do not block unless screen is a simple operation or cannot
  91     //   be performed in the background.  As with any long delay, waiting can cause task starvation which
  92     //   can result in RX loss.
  93     DISPLAY_CLEAR_WAIT = 1 << 0,
  94 } displayClearOption_e;
  95
  96 struct displayCanvas_s;
  97 struct osdCharacter_s;
  98 struct displayPortVTable_s;
  99
 100 typedef struct displayPort_s {
 101     const struct displayPortVTable_s *vTable;
 102     void *device;
 103     uint8_t rows;
 104     uint8_t cols;
 105     uint8_t posX;
 106     uint8_t posY;
 107
 108     // CMS state
 109     bool useFullscreen;
 110     bool cleared;
 111     int8_t cursorRow;
 112     int8_t grabCount;
 113
 114     // Displayport device capability
 115     bool useDeviceBlink;
 116
 117     // The type of display device
 118     displayPortDeviceType_e deviceType;
 119 } displayPort_t;
 120
 121 typedef struct displayPortVTable_s {
 122     int (*grab)(displayPort_t *displayPort);
 123     int (*release)(displayPort_t *displayPort);
 124     int (*clearScreen)(displayPort_t *displayPort, displayClearOption_e options);
 125     bool (*drawScreen)(displayPort_t *displayPort);
 126     int (*screenSize)(const displayPort_t *displayPort);
 127     int (*writeSys)(displayPort_t *displayPort, uint8_t x, uint8_t y, displayPortSystemElement_e systemElement);
 128     int (*writeString)(displayPort_t *displayPort, uint8_t x, uint8_t y, uint8_t attr, const char *text);
 129     int (*writeChar)(displayPort_t *displayPort, uint8_t x, uint8_t y, uint8_t attr, uint8_t c);
 130     bool (*isTransferInProgress)(const displayPort_t *displayPort);
 131     int (*heartbeat)(displayPort_t *displayPort);
 132     void (*redraw)(displayPort_t *displayPort);
 133     bool (*isSynced)(const displayPort_t *displayPort);
 134     uint32_t (*txBytesFree)(const displayPort_t *displayPort);
 135     bool (*layerSupported)(displayPort_t *displayPort, displayPortLayer_e layer);
 136     bool (*layerSelect)(displayPort_t *displayPort, displayPortLayer_e layer);
 137     bool (*layerCopy)(displayPort_t *displayPort, displayPortLayer_e destLayer, displayPortLayer_e sourceLayer);
 138     bool (*writeFontCharacter)(displayPort_t *instance, uint16_t addr, const struct osdCharacter_s *chr);
 139     bool (*checkReady)(displayPort_t *displayPort, bool rescan);
 140     void (*beginTransaction)(displayPort_t *displayPort, displayTransactionOption_e opts);
 141     void (*commitTransaction)(displayPort_t *displayPort);
 142     bool (*getCanvas)(struct displayCanvas_s *canvas, const displayPort_t *displayPort);
 143     void (*setBackgroundType)(displayPort_t *displayPort, displayPortBackground_e backgroundType);
 144 } displayPortVTable_t;
 145
 146 void displayGrab(displayPort_t *instance);
 147 void displayRelease(displayPort_t *instance);
 148 void displayReleaseAll(displayPort_t *instance);
 149 bool displayIsGrabbed(const displayPort_t *instance);
 150 void displayClearScreen(displayPort_t *instance, displayClearOption_e options);
 151 bool displayDrawScreen(displayPort_t *instance);
 152 int displayScreenSize(const displayPort_t *instance);
 153 void displaySetXY(displayPort_t *instance, uint8_t x, uint8_t y);
 154 int displaySys(displayPort_t *instance, uint8_t x, uint8_t y, displayPortSystemElement_e systemElement);
 155 int displayWrite(displayPort_t *instance, uint8_t x, uint8_t y, uint8_t attr, const char *text);
 156 int displayWriteChar(displayPort_t *instance, uint8_t x, uint8_t y, uint8_t attr, uint8_t c);
 157 bool displayIsTransferInProgress(const displayPort_t *instance);
 158 bool displayHeartbeat(displayPort_t *instance);
 159 void displayRedraw(displayPort_t *instance);
 160 bool displayIsSynced(const displayPort_t *instance);
 161 uint16_t displayTxBytesFree(const displayPort_t *instance);
 162 bool displayWriteFontCharacter(displayPort_t *instance, uint16_t addr, const struct osdCharacter_s *chr);
 163 bool displayCheckReady(displayPort_t *instance, bool rescan);
 164 void displayBeginTransaction(displayPort_t *instance, displayTransactionOption_e opts);
 165 void displayCommitTransaction(displayPort_t *instance);
 166 bool displayGetCanvas(struct displayCanvas_s *canvas, const displayPort_t *instance);
 167 void displayInit(displayPort_t *instance, const displayPortVTable_t *vTable, displayPortDeviceType_e deviceType);
 168 bool displayLayerSupported(displayPort_t *instance, displayPortLayer_e layer);
 169 bool displayLayerSelect(displayPort_t *instance, displayPortLayer_e layer);
 170 bool displayLayerCopy(displayPort_t *instance, displayPortLayer_e destLayer, displayPortLayer_e sourceLayer);
 171 void displaySetBackgroundType(displayPort_t *instance, displayPortBackground_e backgroundType);
 172 bool displaySupportsOsdSymbols(displayPort_t *instance);