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86 lines
2.3 KiB
86 lines
2.3 KiB
/* |
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* This file is free software: you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the |
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* 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 file is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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* See the GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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#pragma once |
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#include <AP_OSD/AP_OSD_Backend.h> |
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#include <AP_Common/Bitmask.h> |
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class AP_OSD_MAX7456 : public AP_OSD_Backend { |
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public: |
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static AP_OSD_Backend *probe(AP_OSD &osd, AP_HAL::OwnPtr<AP_HAL::Device> dev); |
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//draw given text to framebuffer |
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void write(uint8_t x, uint8_t y, const char* text) override; |
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//initilize display port and underlying hardware |
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bool init() override; |
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//flush framebuffer to screen |
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void flush() override; |
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//clear framebuffer |
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void clear() override; |
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private: |
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//constructor |
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AP_OSD_MAX7456(AP_OSD &osd, AP_HAL::OwnPtr<AP_HAL::Device> dev); |
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void buffer_add_cmd(uint8_t reg, uint8_t arg); |
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bool update_font(); |
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bool check_font_char(uint8_t chr, const uint8_t* font_data); |
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bool update_font_char(uint8_t chr, const uint8_t* font_data); |
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void check_reinit(); |
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void reinit(); |
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void transfer_frame(); |
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bool is_dirty(uint8_t x, uint8_t y); |
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AP_HAL::OwnPtr<AP_HAL::Device> _dev; |
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uint8_t video_signal_reg; |
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bool initialized; |
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uint8_t last_font; |
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int8_t last_v_offset; |
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int8_t last_h_offset; |
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static const uint8_t video_lines_ntsc = 13; |
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static const uint8_t video_lines_pal = 16; |
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static const uint8_t video_columns = 30; |
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static const uint16_t spi_buffer_size = 512; |
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uint8_t frame[video_lines_pal][video_columns]; |
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//frame already transfered to max |
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//used to optimize number of characters updated |
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uint8_t shadow_frame[video_lines_pal][video_columns]; |
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uint8_t buffer[spi_buffer_size]; |
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int buffer_offset; |
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uint32_t last_signal_check; |
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uint32_t video_detect_time; |
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uint16_t video_lines; |
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};
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