kopia lustrzana https://github.com/OpenRTX/OpenRTX
105 wiersze
3.3 KiB
C
105 wiersze
3.3 KiB
C
/***************************************************************************
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* Copyright (C) 2023 by Niccolò Izzo IU2KIN *
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* Silvano Seva IU2KWO *
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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 3 of the License, or *
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* (at your option) any later version. *
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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, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <zephyr/drivers/display.h>
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#include <interfaces/display.h>
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#include <zephyr/kernel.h>
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#include <zephyr/device.h>
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#include <hwconfig.h>
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#include <string.h>
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// Display is monochromatic, one bit per pixel
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#define FB_SIZE ((CONFIG_SCREEN_HEIGHT * CONFIG_SCREEN_WIDTH) / 8 + 1)
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static const struct device *displayDev;
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static const struct display_buffer_descriptor displayBufDesc =
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{
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FB_SIZE,
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CONFIG_SCREEN_WIDTH,
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CONFIG_SCREEN_HEIGHT,
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CONFIG_SCREEN_WIDTH,
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};
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static uint8_t frameBuffer[FB_SIZE];
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static bool rendering = false;
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void display_init()
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{
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// Get display handle
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displayDev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display));
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// Clear framebuffer, setting all pixels to 0x00 makes the screen black
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memset(&frameBuffer, 0x00, FB_SIZE);
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display_write(displayDev, 0, 0, &displayBufDesc, frameBuffer);
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}
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void display_terminate()
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{
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}
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void display_renderRows(uint8_t startRow, uint8_t endRow)
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{
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// Only complete rendering is supported
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display_render();
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}
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void display_render()
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{
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static uint8_t shadowBuffer[FB_SIZE] = { 0 };
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memset(shadowBuffer, 0x00, FB_SIZE);
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rendering = true;
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for(uint8_t y = 0; y < CONFIG_SCREEN_HEIGHT; y++)
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{
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for(uint8_t x = 0; x < CONFIG_SCREEN_WIDTH; x++)
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{
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size_t cell = x / 8 + y * (CONFIG_SCREEN_WIDTH / 8);
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bool pixel = frameBuffer[cell] & (1 << (x % 8));
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if (pixel)
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shadowBuffer[x + y / 8 * CONFIG_SCREEN_WIDTH] |= 1 << (y % 8);
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}
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}
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display_write(displayDev, 0, 0, &displayBufDesc, shadowBuffer);
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rendering = false;
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}
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bool display_renderingInProgress()
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{
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return rendering;
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}
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void *display_getFrameBuffer()
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{
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return (void *)(frameBuffer);
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}
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void display_setContrast(uint8_t contrast)
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{
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display_set_contrast(displayDev, contrast);
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}
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void display_setBacklightLevel(uint8_t level)
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{
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if(level > 100)
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level = 100;
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uint8_t bkLevel = (2 * level) + (level * 55)/100; // Convert value to 0 - 255
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display_set_contrast(displayDev, bkLevel);
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}
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