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https://gitlab.com/camelot/kickc.git
synced 2025-01-13 18:30:21 +00:00
Added a naive double sine xy-plotter.
This commit is contained in:
jespergravgaard
parent
0598d6548a
commit
ce41782240
@ -0,0 +1,9 @@
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ldy #0
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clc
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lda #<{c1}
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adc ({z2}),y
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sta {m1}
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iny
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lda #>{c1}
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adc ({z2}),y
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sta {m1}+1
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@ -0,0 +1,11 @@
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ldy #0
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clc
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lda #<{c1}
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adc ({z1}),y
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pha
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iny
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lda #>{c1}
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adc ({z1}),y
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sta {z1}+1
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pla
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sta {z1}
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@ -0,0 +1,7 @@
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lda #<{c1}
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clc
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adc {m2}
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sta {m1}
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lda #>{c1}
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adc {m2}+1
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sta {m1}+1
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@ -5,7 +5,7 @@
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"start_address": "0x080d",
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"cpu": "MEGA45GS02",
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"interrupt": "rom_min_c64",
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"emulator": "m65 -l /dev/cu.usbserial-251633005A061 -F -r -4",
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"emulator": "m65.osx -l /dev/cu.usbserial-251633005A061 -F -r -4",
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"defines": {
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"__MEGA65__": 1,
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"__MEGA65_C64__": 1
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@ -5,7 +5,7 @@
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"start_address": "0x2017",
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"cpu": "MEGA45GS02",
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"interrupt": "rom_min_mega65",
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"emulator": "m65 -l /dev/cu.usbserial-251633005A061 -F -r",
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"emulator": "m65.osx -l /dev/cu.usbserial-251633005A061 -F -r",
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"defines": {
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"__MEGA65__": 1
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}
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@ -1,4 +1,4 @@
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// A pretty simple sine plotter
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// A pretty simple double sine plotter
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#pragma target(mega65_remote)
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#include <mega65.h>
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@ -42,6 +42,9 @@ void main() {
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memoryRemap(0x00,0,0);
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// Fast CPU, M65 IO
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POKE(0,65);
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// Disable Kernal & Basic
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*PROCPORT_DDR = PROCPORT_DDR_MEMORY_MASK;
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*PROCPORT = PROCPORT_RAM_IO;
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// Enable MEGA65 features
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VICIV->KEY = VICIV_KEY_M65_A;
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VICIV->KEY = VICIV_KEY_M65_B;
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@ -52,12 +55,6 @@ void main() {
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VICIV->CONTROLC |= VICIV_VFAST;
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graphics_mode();
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// initialize sine index
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char idx = 0;
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for(unsigned int i=0;i<320;i++) {
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sin_idx[i] = idx;
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idx += 11;
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}
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// Initialize plotter
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init_plot();
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@ -66,29 +63,55 @@ void main() {
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while(VICIV->RASTER!=0xe3) ;
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// White border and background
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VICIV->BORDER_COLOR = RED;
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// Switch buffer
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buffer ^=1;
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// Select charset
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if(buffer==0) {
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VICIV->CHARPTR_LOLO = LOBYTE(GRAPHICS1);
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VICIV->CHARPTR_LOHI = HIBYTE(GRAPHICS1);
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VICIV->CHARPTR_HILO = 0;
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graphics_render = GRAPHICS2;
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} else {
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VICIV->CHARPTR_LOLO = LOBYTE(GRAPHICS2);
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VICIV->CHARPTR_LOHI = HIBYTE(GRAPHICS2);
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VICIV->CHARPTR_HILO = 0;
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graphics_render = GRAPHICS1;
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}
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// Clear the graphics
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memset_dma256(0x0, 0x0, 0x6000, 0x00, 40*25*8);
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memset_dma(graphics_render, 0x00, 40*25*8);
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VICIV->BORDER_COLOR = WHITE;
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// Render some dots
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render_dots();
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// Black border and background
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VICIV->BORDER_COLOR = BLACK;
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VICIV->BORDER_COLOR = BLUE;
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}
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}
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// 0: show GRAPHICS1, render to GRAPHICS2
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// 1: show GRAPHICS2, render to GRAPHICS1
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volatile char buffer = 0;
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// The graphics being rendered to
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char * volatile graphics_render = GRAPHICS1;
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// Sine idx for each plot
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char sin_idx[320];
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volatile unsigned int sin_x1_idx;
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volatile unsigned int sin_x2_idx;
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volatile unsigned int sin_y1_idx;
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volatile unsigned int sin_y2_idx;
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// Graphics bit
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char GFX_BIT[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
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// Pointer to graphics for (x, 0)
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char * GFX_PTR[320];
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// Offset to graphics for (x, 0)
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unsigned int GFX_OFFSET[320];
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void init_plot() {
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char * gfx = GRAPHICS;
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unsigned int gfx = 0;
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for(unsigned int i=0; i<320;i++) {
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GFX_PTR[i] = gfx;
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GFX_OFFSET[i] = gfx;
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if((i&7)==7)
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gfx +=200;
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}
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@ -96,27 +119,58 @@ void init_plot() {
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// Do a single plot on the canvas
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void plot(unsigned int x, char y) {
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char * gfx = GFX_PTR[x] + y;
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char * gfx = graphics_render + GFX_OFFSET[x] + y;
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*gfx |= GFX_BIT[x&7];
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}
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void render_dots() {
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// Plot some dots
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for(unsigned int i=0;i<320;i++) {
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char idx = sin_idx[i]++;
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plot(i, SINE[idx]);
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unsigned int idx_x1 = sin_x1_idx;
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sin_x1_idx += 1; if(sin_x1_idx>SINX1_SIZE) sin_x1_idx -=SINX1_SIZE;
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unsigned int idx_x2 = sin_x2_idx;
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sin_x2_idx -= 1; if(sin_x2_idx>SINX2_SIZE) sin_x2_idx +=SINX2_SIZE;
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unsigned int idx_y1 = sin_y1_idx;
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sin_y1_idx -= 1; if(sin_y1_idx>SINY1_SIZE) sin_y1_idx +=SINY1_SIZE;
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unsigned int idx_y2 = sin_y2_idx;
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sin_y2_idx += 1; if(sin_y2_idx>SINY2_SIZE) sin_y2_idx -=SINY2_SIZE;
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for(unsigned int i=0;i<1536;i++) {
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plot(SINX1[idx_x1]+SINX2[idx_x2], SINY1[idx_y1]+SINY2[idx_y2]);
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idx_x1 -= 11; if(idx_x1>SINX1_SIZE) idx_x1 += SINX1_SIZE;
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idx_x2 += 3; if(idx_x2>SINX2_SIZE) idx_x2 -= SINX2_SIZE;
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idx_y1 += 9; if(idx_y1>SINY1_SIZE) idx_y1 -= SINY1_SIZE;
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idx_y2 -= 5; if(idx_y2>SINY2_SIZE) idx_y2 += SINY2_SIZE;
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}
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}
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// Sine table
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char SINE[0x200] = kickasm {{
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.fill $200, round(99.5+99.5*sin(toRadians(360*i/256)))
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const unsigned int SINY1_SIZE = 733;
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char SINY1[SINY1_SIZE+256] = kickasm {{
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.fill 733+256, round(66.5+66.5*sin(toRadians(360*i/733)))
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}};
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const unsigned int SINY2_SIZE = 317;
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char SINY2[SINY2_SIZE+256] = kickasm {{
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.fill 317+256, round(33+33*sin(toRadians(360*i/317)))
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}};
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const unsigned int SINX1_SIZE = 1613;
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unsigned int SINX1[SINX1_SIZE+256] = kickasm {{
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.fillword 1613+256, round(99.5+99.5*sin(toRadians(360*i/1613)))
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}};
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const unsigned int SINX2_SIZE = 547;
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unsigned int SINX2[SINX2_SIZE+256] = kickasm {{
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.fillword 547+256, round(60+60*sin(toRadians(360*i/547)))
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}};
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// Address of the screen
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char * const SCREEN = 0xc000;
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// // Absolute address of the graphics
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char * const GRAPHICS = 0x6000;
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// // Absolute address of graphics buffer 1
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char * const GRAPHICS1 = 0x6000;
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// // Absolute address of graphics buffer 2
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char * const GRAPHICS2 = 0xa000;
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void graphics_mode(void) {
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// 16-bit text mode
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@ -129,13 +183,13 @@ void graphics_mode(void) {
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VICIV->CHARSTEP_HI = 0;
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// Draw 40 chars per row
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VICIV->CHRCOUNT = 40;
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// Put 2KB screen
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// Select 2KB screen
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VICIV->SCRNPTR_LOLO = LOBYTE(SCREEN);
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VICIV->SCRNPTR_LOHI = HIBYTE(SCREEN);
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VICIV->SCRNPTR_HILO = 0x00;
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// Put charset
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VICIV->CHARPTR_LOLO = LOBYTE(GRAPHICS);
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VICIV->CHARPTR_LOHI = HIBYTE(GRAPHICS);
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// Select charset
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VICIV->CHARPTR_LOLO = LOBYTE(GRAPHICS1);
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VICIV->CHARPTR_LOHI = HIBYTE(GRAPHICS1);
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VICIV->CHARPTR_HILO = 0;
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// Layout screen so that graphics data comes from $40000 -- $4FFFF
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@ -164,8 +218,8 @@ void graphics_mode(void) {
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VICIV->BG_COLOR = 0;
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// Clear the graphics
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memset_dma256(0x0, 0x0, 0x6000, 0x00, 40*25*8);
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//memset_dma256(0x0, 0x0, 0x6000, 0xff, 25*8);
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//memset_dma256(0x0, 0x0, 0x6000+25*39*8, 0xff, 25*8);
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memset_dma(GRAPHICS1, 0x00, 40*25*8);
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memset_dma(GRAPHICS2, 0x00, 40*25*8);
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}
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}
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