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93 lines
3.1 KiB
93 lines
3.1 KiB
2 months ago
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/** @defgroup ltdc_file LTDC peripheral API
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*
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* @ingroup peripheral_apis
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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 STM32F4xx and
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* STM32F7xx series of ARM Cortex Microcontrollers by ST Microelectronics.
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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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/**@{*/
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#include <libopencm3/stm32/common/ltdc_common_f47.h>
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void ltdc_set_tft_sync_timings(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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/*---------------------------------------------------------------------------*/
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/** @brief LTDC Windowing Setup
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@param[in] layer_number unsigned int8. @ref ltdc_layer_num
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@param[in] h_back_porch unsigned int16. Horizontal Back Porch
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@param[in] v_back_porch unsigned int16. Vertical Back Porch
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@param[in] h_sync unsigned int16. Horizontal Sync
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@param[in] v_sync unsigned int16. Vertical Sync
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@param[in] width unsigned int16. Width of the screen (e.g. LCD is 320x240, width
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would be 320)
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@param[in] height unsigned int16. Height of the screen (e.g. LCD is 320x240,
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height would be 240)
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*/
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void ltdc_setup_windowing(uint8_t layer_number, uint16_t h_back_porch,
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uint16_t v_back_porch, uint16_t h_sync,
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uint16_t v_sync, uint16_t width, uint16_t height) {
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LTDC_LxWHPCR(layer_number) = (h_back_porch + width + h_sync - 1) << LTDC_LxWHPCR_WHSPPOS_SHIFT |
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(h_sync + h_back_porch) << LTDC_LxWHPCR_WHSTPOS_SHIFT;
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LTDC_LxWVPCR(layer_number) = (v_back_porch + height + v_sync - 1) << LTDC_LxWVPCR_WVSPPOS_SHIFT |
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(v_back_porch + v_sync) << LTDC_LxWVPCR_WVSTPOS_SHIFT;
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}
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/**@}*/
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