src/main/io/displayport_srxl.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 #if defined(USE_SPEKTRUM_CMS_TELEMETRY)
  28
  29 #include "cms/cms.h"
  30
  31 #include "common/utils.h"
  32
  33 #include "drivers/display.h"
  34
  35 #include "telemetry/srxl.h"
  36
  37 #include "displayport_srxl.h"
  38
  39 displayPort_t srxlDisplayPort;
  40
  41 static bool srxlDrawScreen(displayPort_t *displayPort)
  42 {
  43     UNUSED(displayPort);
  44     return 0;
  45 }
  46
  47 static int srxlScreenSize(const displayPort_t *displayPort)
  48 {
  49     return displayPort->rows * displayPort->cols;
  50 }
  51
  52 static int srxlWriteChar(displayPort_t *displayPort, uint8_t col, uint8_t row, uint8_t attr, uint8_t c)
  53 {
  54     UNUSED(displayPort);
  55     UNUSED(attr);
  56
  57     return (spektrumTmTextGenPutChar(col, row, c));
  58 }
  59
  60
  61 static int srxlWriteString(displayPort_t *displayPort, uint8_t col, uint8_t row, uint8_t attr, const char *s)
  62 {
  63     while (*s) {
  64         srxlWriteChar(displayPort, col++, row, attr, *(s++));
  65     }
  66     return 0;
  67 }
  68
  69 static int srxlClearScreen(displayPort_t *displayPort)
  70 {
  71     for (int row = 0; row < SPEKTRUM_SRXL_TEXTGEN_BUFFER_ROWS; row++) {
  72         for (int col= 0; col < SPEKTRUM_SRXL_TEXTGEN_BUFFER_COLS; col++) {
  73             srxlWriteChar(displayPort, col, row, DISPLAYPORT_ATTR_NONE, ' ');
  74         }
  75     }
  76     srxlWriteString(displayPort, 1, 0, DISPLAYPORT_ATTR_NONE, "BETAFLIGHT");
  77
  78     if (displayPort->grabCount == 0) {
  79         srxlWriteString(displayPort, 0, 2, DISPLAYPORT_ATTR_NONE, CMS_STARTUP_HELP_TEXT1);
  80         srxlWriteString(displayPort, 2, 3, DISPLAYPORT_ATTR_NONE, CMS_STARTUP_HELP_TEXT2);
  81         srxlWriteString(displayPort, 2, 4, DISPLAYPORT_ATTR_NONE, CMS_STARTUP_HELP_TEXT3);
  82     }
  83     return 0;
  84 }
  85
  86 static bool srxlIsTransferInProgress(const displayPort_t *displayPort)
  87 {
  88     UNUSED(displayPort);
  89     return false;
  90 }
  91
  92 static bool srxlIsSynced(const displayPort_t *displayPort)
  93 {
  94     UNUSED(displayPort);
  95     return true;
  96 }
  97
  98 static int srxlHeartbeat(displayPort_t *displayPort)
  99 {
 100     UNUSED(displayPort);
 101     return 0;
 102 }
 103
 104 static void srxlRedraw(displayPort_t *displayPort)
 105 {
 106     UNUSED(displayPort);
 107 }
 108
 109 static uint32_t srxlTxBytesFree(const displayPort_t *displayPort)
 110 {
 111     UNUSED(displayPort);
 112     return UINT32_MAX;
 113 }
 114
 115 static int srxlGrab(displayPort_t *displayPort)
 116 {
 117     return displayPort->grabCount = 1;
 118 }
 119
 120 static int srxlRelease(displayPort_t *displayPort)
 121 {
 122     int cnt = displayPort->grabCount = 0;
 123     srxlClearScreen(displayPort);
 124     return cnt;
 125 }
 126
 127 static const displayPortVTable_t srxlVTable = {
 128     .grab = srxlGrab,
 129     .release = srxlRelease,
 130     .clearScreen = srxlClearScreen,
 131     .drawScreen = srxlDrawScreen,
 132     .screenSize = srxlScreenSize,
 133     .writeString = srxlWriteString,
 134     .writeChar = srxlWriteChar,
 135     .isTransferInProgress = srxlIsTransferInProgress,
 136     .heartbeat = srxlHeartbeat,
 137     .redraw = srxlRedraw,
 138     .isSynced = srxlIsSynced,
 139     .txBytesFree = srxlTxBytesFree,
 140     .layerSupported = NULL,
 141     .layerSelect = NULL,
 142     .layerCopy = NULL,
 143 };
 144
 145 static displayPort_t *displayPortSrxlInit()
 146 {
 147     srxlDisplayPort.device = NULL;
 148     displayInit(&srxlDisplayPort, &srxlVTable, DISPLAYPORT_DEVICE_TYPE_SRXL);
 149     srxlDisplayPort.rows = SPEKTRUM_SRXL_TEXTGEN_BUFFER_ROWS;
 150     srxlDisplayPort.cols = SPEKTRUM_SRXL_TEXTGEN_BUFFER_COLS;
 151
 152     return &srxlDisplayPort;
 153 }
 154
 155 void srxlDisplayportRegister(void)
 156 {
 157     cmsDisplayPortRegister(displayPortSrxlInit());
 158 }
 159 #endif