video-terminal-revival/video-terminal/Display.h
2021-03-14 12:54:25 +01:00

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