88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
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/*
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ChibiOS/GFX Copyright (C) 2012, 2013
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX 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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ChibiOS/GFX 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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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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/**
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* @file SSD1963/gdisp_lld_panel.h
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* @brief TFT LCD panel properties.
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*
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* @addtogroup GDISP
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* @{
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*/
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#ifndef _GDISP_LLD_PANEL_H
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#define _GDISP_LLD_PANEL_H
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/* LCD panel specs */
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/* The timings need to follow the datasheet for your particular TFT/LCD screen (the actual screen, not the controller)
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*** Datasheets normally use a specific set of timings and acronyms, their value refers to the number of pixel clocks
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** Non-display periods refer to pulses/timings that occur before or after the timings that actually put pixels on the screen
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** Display periods refer to pulses/timings that directly put pixels on the screen
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HDP: Horizontal Display Period, normally the width - 1
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HT: Horizontal Total period (display + non-display)
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HPS: non-display period between the start of the horizontal sync (LLINE) signal and the first display data
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LPS: horizontal sync pulse (LLINE) start location in pixel clocks
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HPW: Horizontal sync Pulse Width
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VDP: Vertical Display period, normally height - 1
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VT: Vertical Total period (display + non-display)
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VPS: non-display period in lines between the start of the frame and the first display data in number of lines
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FPS: vertical sync pulse (LFRAME) start location in lines.
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VPW: Vertical sync Pulse Width
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*** Here's how to convert them:
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HPS = SCREEN_HSYNC_PULSE + SCREEN_HSYNC_BACK_PORCH
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HT - HPS = GDISP_SCREEN_WIDTH + SCREEN_HSYNC_FRONT_PORCH
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=> SCREEN_HSYNC_FRONT_PORCH = ( HT - HPS ) - GDISP_SCREEN_WIDTH
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SCREEN_HSYNC_PULSE = HPW
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SCREEN_HSYNC_BACK_PORCH = HPS - HPW
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SCREEN_HSYNC_PERIOD = HT
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VPS = SCREEN_VSYNC_PULSE + SCREEN_VSYNC_BACK_PORCH
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VT - VPS = GDISP_SCREEN_HEIGHT + SCREEN_VSYNC_FRONT_PORCH
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=> SCREEN_VSYNC_FRONT_PORCH = ( VT - VPS ) - GDISP_SCREEN_HEIGHT
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SCREEN_VSYNC_PULSE = VPW
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SCREEN_VSYNC_BACK_PORCH = VPS - LPS
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SCREEN_VSYNC_PERIOD = VT
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*/
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#define SCREEN_FPS 60ULL
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//The following values are for a 4.3" TFT LCD
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#define GDISP_SCREEN_WIDTH 480
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#define GDISP_SCREEN_HEIGHT 272
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#define SCREEN_HSYNC_BACK_PORCH 2
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#define SCREEN_HSYNC_FRONT_PORCH 2
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#define SCREEN_HSYNC_PULSE 41
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#define SCREEN_VSYNC_BACK_PORCH 2
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#define SCREEN_VSYNC_FRONT_PORCH 2
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#define SCREEN_VSYNC_PULSE 10
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#define SCREEN_HSYNC_PERIOD (SCREEN_HSYNC_PULSE + SCREEN_HSYNC_BACK_PORCH + GDISP_SCREEN_WIDTH + SCREEN_HSYNC_FRONT_PORCH)
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#define SCREEN_VSYNC_PERIOD (SCREEN_VSYNC_PULSE + SCREEN_VSYNC_BACK_PORCH + GDISP_SCREEN_HEIGHT + SCREEN_VSYNC_FRONT_PORCH)
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#define SCREEN_PCLK (SCREEN_HSYNC_PERIOD * SCREEN_VSYNC_PERIOD * SCREEN_FPS)
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#define GDISP_FPR ((SCREEN_PCLK * 1048576)/100000000)
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#endif
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/** @} */
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