123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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MIT License
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Copyright (c) 2018, Alexey Dynda
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include "sdl_pcd8544.h"
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#include "sdl_oled_basic.h"
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#include "sdl_graphics.h"
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#include "sdl_core.h"
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static int s_activeColumn = 0;
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static int s_activePage = 0;
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const static int s_columnStart = 0;
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const static int s_columnEnd = 83;
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const static int s_pageStart = 0;
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const static int s_pageEnd = 5;
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static int s_verticalMode = 0;
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static uint8_t detected = 0;
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static int sdl_pcd8544_detect(uint8_t data)
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{
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if (detected)
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{
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return 1;
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}
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detected = (data == SDL_LCD_PCD8544);
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return 0;
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}
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static void sdl_pcd8544_commands(uint8_t data)
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{
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// printf("%02X\n", data);
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switch (s_commandId)
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{
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case 0x20:
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s_verticalMode = 0;
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s_commandId = SSD_COMMAND_NONE;
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break;
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case 0x22:
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s_verticalMode = 1;
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s_commandId = SSD_COMMAND_NONE;
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break;
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default:
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if ((s_commandId & 0x80) == 0x80 )
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{
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s_activeColumn = s_commandId & 0x7F;
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if (s_activeColumn > s_columnEnd) s_activeColumn = s_columnEnd;
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}
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if ((s_commandId & 0xC0) == 0x40 )
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{
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s_activePage = s_commandId & 0x3F;
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if (s_activePage > s_pageEnd) s_activePage = s_pageEnd;
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}
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s_commandId = SSD_COMMAND_NONE;
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break;
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}
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}
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void sdl_pcd8544_data(uint8_t data)
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{
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int x = s_activeColumn;
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int y = s_activePage;
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for (int i=0; i<8; i++)
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{
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if (data & (1<<i))
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{
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sdl_put_pixel(x, (y<<3) + i, 0xAD59);
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}
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else
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{
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sdl_put_pixel(x, (y<<3) + i, 0x0000);
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}
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}
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if (s_verticalMode)
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{
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s_activePage++;
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if (s_activePage > s_pageEnd)
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{
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s_activePage = s_pageStart;
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}
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}
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else
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{
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s_activeColumn++;
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if (s_activeColumn > s_columnEnd)
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{
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s_activeColumn = s_columnStart;
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}
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}
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}
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sdl_oled_info sdl_pcd8544 =
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{
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.width = 84,
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.height = 48,
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.bpp = 16,
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.pixfmt = SDL_PIXELFORMAT_RGB565,
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.dataMode = SDMS_AUTO,
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.detect = sdl_pcd8544_detect,
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.run_cmd = sdl_pcd8544_commands,
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.run_data = sdl_pcd8544_data,
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};
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