src/main/drivers/display.c

   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 #include <stdbool.h>
  22 #include <stdint.h>
  23 #include <string.h>
  24
  25 #include "platform.h"
  26
  27 #include "common/utils.h"
  28
  29 #include "display.h"
  30
  31 void displayClearScreen(displayPort_t *instance)
  32 {
  33     instance->vTable->clearScreen(instance);
  34     instance->cleared = true;
  35     instance->cursorRow = -1;
  36 }
  37
  38 void displayDrawScreen(displayPort_t *instance)
  39 {
  40     instance->vTable->drawScreen(instance);
  41 }
  42
  43 int displayScreenSize(const displayPort_t *instance)
  44 {
  45     return instance->vTable->screenSize(instance);
  46 }
  47
  48 void displayGrab(displayPort_t *instance)
  49 {
  50     instance->vTable->grab(instance);
  51     instance->vTable->clearScreen(instance);
  52     ++instance->grabCount;
  53 }
  54
  55 void displayRelease(displayPort_t *instance)
  56 {
  57     instance->vTable->release(instance);
  58     --instance->grabCount;
  59 }
  60
  61 void displayReleaseAll(displayPort_t *instance)
  62 {
  63     instance->vTable->release(instance);
  64     instance->grabCount = 0;
  65 }
  66
  67 bool displayIsGrabbed(const displayPort_t *instance)
  68 {
  69     // can be called before initialised
  70     return (instance && instance->grabCount > 0);
  71 }
  72
  73 void displaySetXY(displayPort_t *instance, uint8_t x, uint8_t y)
  74 {
  75     instance->posX = x;
  76     instance->posY = y;
  77 }
  78
  79 int displayWrite(displayPort_t *instance, uint8_t x, uint8_t y, const char *s)
  80 {
  81     instance->posX = x + strlen(s);
  82     instance->posY = y;
  83     return instance->vTable->writeString(instance, x, y, s);
  84 }
  85
  86 int displayWriteChar(displayPort_t *instance, uint8_t x, uint8_t y, uint8_t c)
  87 {
  88     instance->posX = x + 1;
  89     instance->posY = y;
  90     return instance->vTable->writeChar(instance, x, y, c);
  91 }
  92
  93 bool displayIsTransferInProgress(const displayPort_t *instance)
  94 {
  95     return instance->vTable->isTransferInProgress(instance);
  96 }
  97
  98 bool displayIsSynced(const displayPort_t *instance)
  99 {
 100     return instance->vTable->isSynced(instance);
 101 }
 102
 103 void displayHeartbeat(displayPort_t *instance)
 104 {
 105     instance->vTable->heartbeat(instance);
 106 }
 107
 108 void displayResync(displayPort_t *instance)
 109 {
 110     instance->vTable->resync(instance);
 111 }
 112
 113 uint16_t displayTxBytesFree(const displayPort_t *instance)
 114 {
 115     return instance->vTable->txBytesFree(instance);
 116 }
 117
 118 void displayInit(displayPort_t *instance, const displayPortVTable_t *vTable)
 119 {
 120     instance->vTable = vTable;
 121     instance->vTable->clearScreen(instance);
 122     instance->useFullscreen = false;
 123     instance->cleared = true;
 124     instance->grabCount = 0;
 125     instance->cursorRow = -1;
 126 }