90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/** @defgroup ltdc_file LTDC
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*
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* @ingroup STM32F4xx
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*
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* @brief <b>libopencm3 STM32F4xx LTDC</b>
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*
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* @version 1.0.0
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*
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* @author @htmlonly © @endhtmlonly 2014
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* Oliver Meier <h2obrain@gmail.com>
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*
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* @date 5 December 2014
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*
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* This library supports the LCD controller (LTDC) in the STM32F4
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* series of ARM Cortex Microcontrollers by ST Microelectronics.
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*
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* For the STM32F4xx, LTDC is described in LCD-TFT Controller (LTDC)
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* section 16 of the STM32F4xx Reference Manual (RM0090,Rev8).
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*
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*
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* LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2014 Oliver Meier <h2obrain@gmail.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/f4/ltdc.h>
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void ltdc_set_tft_sync_timings(
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uint16_t sync_width, uint16_t sync_height,
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uint16_t h_back_porch, uint16_t v_back_porch,
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uint16_t active_width, uint16_t active_height,
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uint16_t h_front_porch, uint16_t v_front_porch
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) {
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/*assert((active_width <= 0x400) && (active_height <= 0x300));*/
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uint16_t w,h;
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w=sync_width -1;
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h=sync_height -1;
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/*assert((w&0xfff == w) && (h&0x7ff == h));*/
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LTDC_SSCR = (w<<16) | (h<<0);
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w+=h_back_porch;
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h+=v_back_porch;
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/*assert((w&0xfff == w) && (h&0x7ff == h));*/
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LTDC_BPCR = (w<<16) | (h<<0);
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w+=active_width;
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h+=active_height;
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/*assert((w&0xfff == w) && (h&0x7ff == h));*/
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LTDC_AWCR = (w<<16) | (h<<0);
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w+=h_front_porch;
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h+=v_front_porch;
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/*assert((w&0xfff == w) && (h&0x7ff == h));*/
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LTDC_TWCR = (w<<16) | (h<<0);
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}
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void ltdc_setup_windowing(
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uint8_t layer_number,
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uint16_t h_back_porch, uint16_t v_back_porch,
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uint16_t active_width, uint16_t active_height
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) {
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active_width += h_back_porch-1;
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active_height += v_back_porch-1;
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/*assert(
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(h_back_porch&0xfff == h_back_porch) && (v_back_porch &0xfff == v_back_porch) &&
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(active_width&0xfff == active_width) && (active_height&0xfff == active_height)
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);*/
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LTDC_LxWHPCR(layer_number) = (active_width <<16) | (h_back_porch<<0);
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LTDC_LxWVPCR(layer_number) = (active_height<<16) | (v_back_porch<<0);
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}
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