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jscranejscrane
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‎.gitignore

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images/
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# Compiled Object files
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*.slo
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*.lo

‎Makefile

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PROCESSOR_FAMILY := lm4f
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BOARD := lplm4f120h5qr
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# watch the CPU execute
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#LOCAL_CPPFLAGS := -DCPU_DEBUG
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CXXFLAGS := -fno-operator-names
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include energia.mk

‎config.h

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#ifndef __CONFIG_H__
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#define __CONFIG_H__
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#define P1_START 0x16 // 1
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#define P2_START 0x1e // 2
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#define COIN 0x26 // 3
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#define KEY_LEFT 0x33 // H
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#define KEY_RIGHT 0x4b // L
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#define KEY_UP 0x42 // K
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#define KEY_DOWN 0x3b // J
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//#define KEY_LEFT PS2_LEFTARROW
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//#define KEY_RIGHT PS2_RIGHTARROW
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//#define KEY_UP PS2_UPARROW
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//#define KEY_DOWN PS2_DOWNARROW
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#define PAUSE 0x29 // space
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#define ROTATE 0x2d // r
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#endif

‎display.cpp

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#include <Energia.h>
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#include <UTFT.h>
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#include <r65emu.h>
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#include "display.h"
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#include "roms/rom5e.h" // tiles
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#include "roms/rom5f.h" // sprites
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#include "roms/rom82s123_7f.h" // colours
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#include "roms/rom82s126_4a.h" // palette
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void Display::begin() {
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UTFTDisplay::begin(VGA_BLACK, VGA_WHITE, portrait);
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clear();
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_xoff = (_dx - DISPLAY_WIDTH) / 2;
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_yoff = (_dy - DISPLAY_HEIGHT) / 2;
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}
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void Display::update() {
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draw_tiles();
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}
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static void get_tile_palette(palette_entry &p, byte index) {
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index <<= 2;
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p.set_colour(colours[palette[index ]], 0);
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p.set_colour(colours[palette[index+1]], 1);
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p.set_colour(colours[palette[index+2]], 2);
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p.set_colour(colours[palette[index+3]], 3);
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}
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void Display::draw_sprite_slice(palette_entry &p, byte *cdata, int offset, int x, int y) {
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offset *= 32;
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for (int n = 7; n >= 0; n--) // 8 columns
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for (int m = 3; m >= 0; m--) { // 4 rows
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colour &c = p.colours[cdata[offset]];
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utft.setColor(c.red, c.green, c.blue);
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// FIXME: investigate this
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if (_dx <= (x+n)) {
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//Serial.print("x offscreen: ");
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//Serial.println(x+n);
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continue;
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}
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if (_dy <= (y+m)) {
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//Serial.print("y offscreen: ");
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//Serial.println(y+m);
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continue;
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}
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utft.drawPixel(x+n, y+m);
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offset++;
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}
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}
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void Display::draw_tile(word a, int x, int y) {
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byte tile = _tiles[a];
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byte character[64];
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for (unsigned i = 0; i < 16; i++) {
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byte b = tiles[tile*16 + i];
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character[i*4 ] = (b & 0x01) | ((b >> 3) & 0x02);
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character[i*4+1] = ((b >> 1) & 0x01) | ((b >> 4) & 0x02);
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character[i*4+2] = ((b >> 2) & 0x01) | ((b >> 5) & 0x02);
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character[i*4+3] = ((b >> 3) & 0x01) | ((b >> 6) & 0x02);
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}
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palette_entry p;
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get_tile_palette(p, _tiles[a + 0x0400]);
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draw_sprite_slice(p, character, 0, x, y+4);
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draw_sprite_slice(p, character, 1, x, y);
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}
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void Display::_set(word a, byte b) {
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if (_tiles[a] != b) {
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_tiles[a] = b;
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int x, y;
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if (a >= 0x02 && a < 0x1e) {
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x = 27 - a+0x02;
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y = 34;
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} else if (a >= 0x22 && a < 0x3e) {
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x = 27 - a+0x22;
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y = 35;
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} else if (a >= 0x40 && a < 0x3c0) {
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word o = a - 0x40;
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x = 27 - o / 0x20;
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y = 2 + o % 0x20;
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} else if (a >= 0x3c2 && a < 0x3e0) {
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x = 27 - a+0x3c2;
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y = 0;
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} else if (a >= 0x3e2 && a < 0x400) {
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x = 27 - a+0x3e2;
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y = 1;
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} else
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return;
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draw_tile(a, 8*x + _xoff, 8*y + _yoff);
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}
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}
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void Display::set_sprite(int n, byte sx, byte sy) {
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int x = DISPLAY_WIDTH - sx + 15 + _xoff;
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int y = DISPLAY_HEIGHT - sy - 16 + _yoff;
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byte sir = _mem[0x4ff0 + n*2];
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/*
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Serial.print("sprite ");
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Serial.print(n);
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Serial.print(" ");
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Serial.print(sir);
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Serial.print(" ");
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Serial.print(sx);
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Serial.print(", ");
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Serial.println(sy);
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*/
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byte character[256];
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word si = 64*(sir >> 2);
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for (unsigned i = 0; i < 64; i++) {
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byte b = sprites[si + i];
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character[i*4 ] = (b & 0x01) | ((b >> 3) & 0x02);
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character[i*4+1] = ((b >> 1) & 0x01) | ((b >> 4) & 0x02);
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character[i*4+2] = ((b >> 2) & 0x01) | ((b >> 5) & 0x02);
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character[i*4+3] = ((b >> 3) & 0x01) | ((b >> 6) & 0x02);
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}
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palette_entry p;
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get_tile_palette(p, _mem[0x4ff1 + n*2]);
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draw_sprite_slice(p, character, 0, x+8, y+12);
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draw_sprite_slice(p, character, 1, x+8, y);
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draw_sprite_slice(p, character, 2, x+8, y+4);
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draw_sprite_slice(p, character, 3, x+8, y+8);
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draw_sprite_slice(p, character, 4, x, y+12);
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draw_sprite_slice(p, character, 5, x, y);
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draw_sprite_slice(p, character, 6, x, y+4);
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draw_sprite_slice(p, character, 7, x, y+8);
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// FIXME rotation
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}

‎display.h

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#ifndef __DISPLAY_H__
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#define __DISPLAY_H__
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#define DISPLAY_WIDTH 224
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#define DISPLAY_HEIGHT 288
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class colour {
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public:
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byte red, green, blue;
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void set(byte r, byte g, byte b) {
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red = r; green = g; blue = b;
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}
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};
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class palette_entry {
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public:
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colour colours[4];
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void set_colour(byte c, int i) {
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byte r = 0, g = 0, b = 0;
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if (c != 0) {
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r = (c & 0x01)*0x21 + ((c >> 1) & 0x01)*0x47 + ((c >> 2) & 0x01)*0x97;
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g = ((c >> 3) & 0x01)*0x21 + ((c >> 4) & 0x01)*0x47 + ((c >> 5) & 0x01)*0x97;
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b = ((c >> 6) & 0x01)*0x51 + ((c >> 7) & 0x01)*0xae;
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}
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colours[i].set(r, g, b);
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}
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};
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class Display: public UTFTDisplay, public Memory::Device {
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public:
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Display(Memory &mem): Memory::Device(sizeof(_tiles)), _mem(mem) {}
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virtual void operator=(byte b) { _set(_acc, b); }
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virtual operator byte() { return _tiles[_acc]; }
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void begin();
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void update();
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void set_sprite(int n, byte sx, byte sy);
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private:
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void _set(word a, byte b);
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void draw_tiles();
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void draw_tile(word addr, int x, int y);
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void draw_sprite_slice(palette_entry &p, byte *c, int o, int x, int y);
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unsigned _xoff, _yoff;
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byte _tiles[2048];
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Memory &_mem;
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};
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#endif

‎docs/PacmanEmulation.pdf

1.91 MB
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