122 line
3.2 KiB
C++
122 line
3.2 KiB
C++
/*
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CONNECTION from ESP32 to a composite video TV
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A) voltageDivider = false; B) voltageDivider = true
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55 shades 179 shades
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ESP32 TV ESP32 TV
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-----+ -----+ ____ 100 ohm
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G|- G|---|____|+
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pin25|--------- Comp pin25|---|____|+--------- Comp
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pin26|- pin26|- 220 ohm
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-----+ -----+
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Connect pin 25 or 26
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C) R–2R resistor ladder; D) unequal rungs ladder
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55 shades up to 254 shades?
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ESP32 TV ESP32 TV
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-----+ -----+ ____
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G|-+_____ G|---|____|
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pinA0|-| R2R |- Comp pinA0|---|____|+--------- Comp
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pinA1|-| | pinA1|---|____|
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pinA2|-| | ...|
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...|-|_____| |
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-----+ -----+
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Connect pins of your choice (A0...A8=any pins).
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Custom ladders can be used by tweaking colorMinValue and colorMaxValue
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*/
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#define COMPOSITE_VIDEO_PIN 25 // hardcoded, this pin has a HW DAC
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#include <ESP32Lib.h>
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#include <Ressources/Font6x8.h>
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#include <Ressources/CodePage437_8x8.h>
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//#include <Ressources/CodePage437_8x14.h>
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//#include <Ressources/CodePage437_8x16.h>
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//#include <Ressources/CodePage437_8x19.h>
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//#include <Ressources/CodePage437_9x16.h>
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#define FONT CodePage437_8x8
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//pin configuration for DAC
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const int outputPin = COMPOSITE_VIDEO_PIN;
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// A) B)
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CompositeGrayDAC videodisplay;
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// C) D)
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//CompositeGrayLadder videodisplay;
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class Display {
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public:
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// view(able) size
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int vw = 350;
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int vh = 235;
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// offsets (to fix overscan, depends on your display)
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int ow = 10;
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int oh = 26;
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// display size
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int w = 365; // vw + 2*ow
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int h = 275; // vh + 2*oh
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int font_w = FONT.charWidth;
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int font_h = FONT.charHeight + 1;
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int cols = vw / font_w;
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int rows = vh / font_h;
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void setup()
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{
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// Composite video init, see options in the header ^^^
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// A)
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//videodisplay.init(CompMode::MODEPAL288P, 25, false);
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// B)
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videodisplay.init(CompMode::MODEPAL288P, 25, true);
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videodisplay.clear();
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videodisplay.xres = w;
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videodisplay.yres = h;
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videodisplay.setFont(FONT);
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/*/ view area test
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videodisplay.rect(ow, oh, vw, vh, 50);
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/**/
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}
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void scroll(int d) {
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videodisplay.scroll(d, 0);
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}
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void fill_rect(int x, int y, int w, int h, int color) {
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videodisplay.fillRect(x, y, w, h, color);
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}
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void pixel(int x, int y, int color) {
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videodisplay.dotFast(x, y, color);
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}
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void print_character(int col, int row, int fg_color, int bg_color, char character) {
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int x = ow + col*font_w;
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int y = oh + row*font_h;
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videodisplay.setCursor(x, y);
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videodisplay.setTextColor(fg_color, bg_color);
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videodisplay.print(character);
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}
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int get_display_width() { return w; }
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int get_display_height() { return h; }
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int get_view_width() { return vw; }
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int get_view_height() { return vh; }
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int get_view_width_offset() { return ow; }
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int get_view_height_offset() { return oh; }
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};
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