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b155e2c35a
According to the datasheet, the PLL fractional mode is apparently not supported in the medium VCO range. The LCD isn't picky about front/back porch settings so modify these to get a dot clock close to 6 MHz (within ~0.1% error). Change-Id: I51647534db8c2b261391864db9262a0b04548e6d
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2025 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __LCD_ECHOPLAYER_H__
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#define __LCD_ECHOPLAYER_H__
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#include "config.h"
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/* Hsync pulse width in units of dot clocks */
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#define LCD_HSW 14
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/* Hsync back porch in units of dot clocks */
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#define LCD_HBP 7
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/* Horizontal active width in units of dot clocks */
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#define LCD_HAW LCD_WIDTH
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/* Hsync front porch in units of dot clocks */
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#define LCD_HFP 7
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/* Vsync pulse height in units of horizontal lines */
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#define LCD_VSH 2
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/* Vsync back porch in units of horizontal lines */
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#define LCD_VBP 2
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/* Vertical active height in units of horizontal lines */
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#define LCD_VAH LCD_HEIGHT
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/* Vsync front porch in units of horizontal lines */
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#define LCD_VFP 2
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/* Total horizontal width in dots */
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#define LCD_HWIDTH (LCD_HSW + LCD_HBP + LCD_HAW + LCD_HFP)
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/* Total vertical height in lines */
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#define LCD_VHEIGHT (LCD_VSH + LCD_VBP + LCD_VAH + LCD_VFP)
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/* Target frame rate */
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#define LCD_FPS 70
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/* Dot clock frequency */
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#define LCD_DOTCLOCK_FREQ (LCD_FPS * LCD_HWIDTH * LCD_VHEIGHT)
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#endif /* __LCD_ECHOPLAYER_H__ */
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