79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/**
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* @file DisplayProxyMAX7456.h
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* @author Jens True (jens.chr.true@gmail.com)
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* @brief DisplayProxyMAX7456 header
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* @version 0.1
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* @date 2021-11-10
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*
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* @copyright Copyright (c) 2021
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*
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*/
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#ifndef DISPLAYPROXYMAX7456_H
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#define DISPLAYPROXYMAX7456_H
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#include "DisplayProxy.h"
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#include "max7456.h"
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/**
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* Text-User-Interface on a MAX7456
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*
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* The MAX7456 provides On-Screen-Display rendering for composite video.
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* (Think old school VCR menu overlay)
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*
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* To find the offical documentation for the part please refer to the Maxim page for the MAX7456.
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* [Maxim Page](https://www.maximintegrated.com/en/products/analog/video-products/MAX7456.html)
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*
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*/
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class DisplayProxyMAX7456 : public DisplayProxy
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{
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public:
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/**
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* Initalize a MAX7456 Style display
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* - Initialize with CS on Pin 6.
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* - Clear the display
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* - Initialize blinking frequency.
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* - Disable external video
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* - Enable OSD.
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*/
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explicit DisplayProxyMAX7456();
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/**
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* OSD on, external video left untouched.
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*/
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bool on() override;
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/**
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* OSD off, external video off.
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*/
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bool off() override;
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/**
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* Depending on the font loaded into the Max7456 the output might not be ASCII compatible.
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*/
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bool write(int x, int y, const char *text) override;
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bool clear() override;
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/**
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* Adjust the display offset.
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* Since the signal is analog the characters might be rendered outside the display area
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*/
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bool setOffset(int x, int y);
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/**
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* Turn off the external video feed
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* If the external feed is disabled the background will be grey
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* @param enabled True to turn on the external video input
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*/
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bool externalVideo(bool enabled);
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/**
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* Turn on the overlay
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*
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* @param enabled True to turn on the overlay
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*/
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bool onScreenDisplay(bool enabled);
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private:
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Max7456 *osd;
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};
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#endif |