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rgbtest.c
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/*
* RGB test (c) 2023 IanB
* Based on pico extras scanvideo (c) 2021 Raspberry Pi (Trading) Ltd.
*/
#include <stdio.h>
#include <math.h>
#include "memory.h"
#include "pico.h"
#include "pico/stdlib.h"
#include "pico/multicore.h"
#include "pico/scanvideo.h"
#include "pico/scanvideo/composable_scanline.h"
#include "pico/sync.h"
#include "hardware/clocks.h"
#include "hardware/pll.h"
#include "charset.h" // The character set
#include "custom_modes.h"
#include "hardware/watchdog.h"
#define MAX_FRAME_BUFFER_WIDTH 640
#define FRAME_BUFFER_HEIGHT 16
#define PICO_SCANVIDEO_PIXEL_FROM_RGB4(r, g, b) (((b)<<(PICO_SCANVIDEO_PIXEL_BSHIFT+1))|((g)<<(PICO_SCANVIDEO_PIXEL_GSHIFT+1))|((r)<<(PICO_SCANVIDEO_PIXEL_RSHIFT+1)))
enum {
PATTERN_12BIT,
PATTERN_9BIT,
PATTERN_9BIT_LOW,
PATTERN_6BIT,
PATTERN_3BIT,
PATTERN_1BIT,
PATTERN_GRATING,
PATTERN_CGA,
PATTERN_CGA_MONO,
PATTERN_CGA_4COL_PALETTE1,
PATTERN_CGA_4COL_PALETTE2,
PATTERN_GREY_BARS,
PATTERN_GREY_0x0A,
PATTERN_FULL_GRATING,
PATTERN_LUMACODE,
PATTERN_APPLE_ARTIFACT,
PATTERN_TEXT,
};
static unsigned short bitmap[MAX_FRAME_BUFFER_WIDTH * FRAME_BUFFER_HEIGHT]; //small frame buffer to hold text
static semaphore_t video_initted;
static bool invert;
char line1[128];
char line2[128];
uint border_colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x4, 0x4, 0x4);
uint active_width;
uint active_height;
uint max_text_chars = 80;
uint mode=0;
uint bright = 0;
scanvideo_mode_t vga_mode;
uint pattern = PATTERN_12BIT;
void *memset16(void *m, unsigned short val, size_t count)
{
unsigned short *buf = m;
while(count--) *buf++ = val;
return m;
}
void cls(unsigned short c) {
memset16(bitmap, c, MAX_FRAME_BUFFER_WIDTH * FRAME_BUFFER_HEIGHT);
}
void print_char(int x, int y, int c, unsigned short bc, unsigned short fc) {
int char_index;
unsigned short * ptr;
if(c >= 32 && c < 128) {
char_index = (c) * 8;
ptr = &bitmap[(MAX_FRAME_BUFFER_WIDTH * y + x + 7)];
for(int row = 0; row < 8; row++) {
unsigned char data = charset[char_index + row];
for(int bit = 0; bit < 8; bit ++) {
*(ptr- bit) = (data & (1 << bit)) ? fc : bc;
}
ptr += MAX_FRAME_BUFFER_WIDTH;
}
}
}
void print_string(int x, int y, char *s, unsigned short bc, unsigned short fc) {
if (x < 0) x = 0;
for(int i = 0; i < strlen(s); i++) {
print_char(x + i * 8, y, s[i], bc, fc);
}
}
void set_sys_clock_pll_with_refdiv(uint32_t vco_freq, uint post_div1, uint post_div2, uint refdiv) {
clock_configure(clk_sys,
CLOCKS_CLK_SYS_CTRL_SRC_VALUE_CLKSRC_CLK_SYS_AUX,
CLOCKS_CLK_SYS_CTRL_AUXSRC_VALUE_CLKSRC_PLL_USB,
48 * MHZ,
48 * MHZ);
pll_init(pll_sys, refdiv, vco_freq, post_div1, post_div2);
uint32_t freq = vco_freq / (post_div1 * post_div2);
// Configure clocks
// CLK_REF = XOSC (12MHz) / 1 = 12MHz
clock_configure(clk_ref,
CLOCKS_CLK_REF_CTRL_SRC_VALUE_XOSC_CLKSRC,
0, // No aux mux
12 * MHZ,
12 * MHZ);
// CLK SYS = PLL SYS (125MHz) / 1 = 125MHz
clock_configure(clk_sys,
CLOCKS_CLK_SYS_CTRL_SRC_VALUE_CLKSRC_CLK_SYS_AUX,
CLOCKS_CLK_SYS_CTRL_AUXSRC_VALUE_CLKSRC_PLL_SYS,
freq, freq);
clock_configure(clk_peri,
0, // Only AUX mux on ADC
CLOCKS_CLK_PERI_CTRL_AUXSRC_VALUE_CLKSRC_PLL_USB,
48 * MHZ,
48 * MHZ);
}
int read_mode() {
return ((gpio_get_all() >> 19) & 0x0f) ^ 0x0f;
}
int read_sw1() {
return gpio_get(26);
}
int read_sw2() {
return gpio_get(27);
}
void set_mode(int mode) {
uint pixel_clk;
#define header "RGBtoHDMI Tester v0.33 (%dx%d@%dHz, %.2fMhz, %s)"
border_colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x4, 0x4, 0x4);
max_text_chars = 80;
uint black = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
uint white = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf);
cls(black);
print_string(0, 0, "ST MONO OK",black, 0x00000020); //note uses otherwise unused green lsb
print_string(0, 8, "ST BLANK OK",black, 0x00000800); //note uses otherwise unused blue lsb
switch (mode) {
default:
case 0 :
active_width = 640;
active_height = 256;
vga_mode = pal_mode_800x288_50_312;
pattern = PATTERN_12BIT;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 12BPP, Analog: 4 Level_Terminated", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
case 1 :
active_width = 640;
active_height = 256;
vga_mode = pal_mode_800x288_50_316;
pattern = PATTERN_12BIT;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 9BPP, Analog: 3 Level Terminated", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
case 2 :
active_width = 640;
active_height = 256;
vga_mode = pal_mode_800x288_50_310;
pattern = PATTERN_12BIT;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 6BPP, Analog: 3 Level Term + Clamp", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
case 3 :
active_width = 640;
active_height = 256;
vga_mode = pal_mode_800x288_50_314;
pattern = PATTERN_12BIT;
pixel_clk = vga_mode.default_timing->clock_freq;
//border_colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x8);
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 3BPP, Analog: 3 Level UnTerminated", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
case 4 :
active_width = 640;
active_height = 200;
vga_mode = c64_mode_744x240_60_262;
pattern = PATTERN_LUMACODE;
//pixel clock is 16363636
pixel_clk = vga_mode.default_timing->clock_freq;
set_sys_clock_pll (1572000000, 6, 2); //131Mhz so pixel clock is 16.375mhz
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Commodore 64 LumaCode", mode);
break;
case 5 :
active_width = 640;
active_height = 200;
vga_mode = apple_mode_744x240_60_266;
pattern = PATTERN_APPLE_ARTIFACT;
//pixel clock is 14312500
pixel_clk = vga_mode.default_timing->clock_freq;
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Apple II NTSC Artifact", mode);
break;
case 6 :
active_width = 640;
active_height = 200;
vga_mode = cga_mode_744x240_60_00;
pattern = PATTERN_CGA;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V");
sprintf(line2, "Mode %X: CGA Multi NTSC artifact", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
//set_sys_clock_pll(1374000000, 6, 2); //114.0Mhz but misread as 114.5 by clock_get_hz(clk_sys) without refdiv set to 2
//set_sys_clock_pll (1032000000, 3, 3); //114.666666Mhz so pixel clock is 14.3333333mhz
break;
case 7 :
active_width = 640;
active_height = 200;
vga_mode = cga_mode_744x240_60_01;
pattern = PATTERN_CGA_MONO;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H-V");
sprintf(line2, "Mode %X: CGA Mono Mode NTSC artifact", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
//set_sys_clock_pll(1374000000, 6, 2); //114.0Mhz but misread as 114.5 by clock_get_hz(clk_sys) without refdiv set to 2
//set_sys_clock_pll (1032000000, 3, 3); //114.666666Mhz so pixel clock is 14.3333333mhz
break;
case 8 :
active_width = 640;
active_height = 200;
vga_mode = cga_mode_744x240_60_10;
pattern = PATTERN_CGA_4COL_PALETTE1;
white = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x0);
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H-V");
sprintf(line2, "Mode %X: CGA 4 Colour Palette 1 NTSC artifact", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
break;
case 9 :
active_width = 640;
active_height = 200;
vga_mode = cga_mode_744x240_60_11;
pattern = PATTERN_CGA_4COL_PALETTE2;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V");
sprintf(line2, "Mode %X: CGA 4 Colour Palette 2 NTSC artifact", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
break;
case 10 :
active_width = 640;
active_height = 256;
vga_mode = pal_mode_800x288_50_312;
pattern = PATTERN_FULL_GRATING;
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Calibration test", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
case 11 :
active_width = 320;
active_height = 256;
vga_mode = pal_mode_384x288_60_TS9347_1_1;
pattern = PATTERN_GREY_BARS;
pixel_clk = vga_mode.default_timing->clock_freq;
max_text_chars = 40;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 9BPP, Analog: 8 Level Mono", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
break;
case 12 :
active_width = 480;
active_height = 256;
vga_mode = pal_mode_576x288_60_TS9347_1_1;
pattern = PATTERN_GREY_BARS;
pixel_clk = vga_mode.default_timing->clock_freq;
max_text_chars = 60;
sprintf(line1, header, active_width, active_height, 60, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: Digital: 9BPP, Analog: 8 Level Mono", mode);
set_sys_clock_pll_with_refdiv(1374000000, 6, 2, 2); //114.5Mhz (8 * 14.3125Mhz)
break;
case 13 :
active_width = 640;
active_height = 400;
vga_mode = atari_mono_mode_704x464_72;
pattern = PATTERN_GRATING;
border_colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xf);
pixel_clk = vga_mode.default_timing->clock_freq;
sprintf(line1, header, active_width, active_height, 72, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: (Atari Mono) Digital: 3BPP, Analog: 3BPP", mode);
set_sys_clock_pll_with_refdiv(1800000000, 7, 2, 1); //128.571428Mhz
break;
case 14 :
vga_mode = portrait_mode_864x1024_59;
// pixel clock is 64000000
pixel_clk = vga_mode.default_timing->clock_freq;
//set_sys_clock_pll_refdiv(1, 1920000000, 6, 1); //320Mhz (5 * 64Mhz)
set_sys_clock_khz(pixel_clk * 4 / 1000, true);
border_colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xf);
active_width = 864;
active_height = 1024;
sprintf(line1, header, active_width, active_height, 59, (double)pixel_clk / 1000000, "+H+V");
sprintf(line2, "Mode %X: (Hi res) Digital: 3BPP, Analog: 3BPP", mode);
pattern = PATTERN_GRATING;
break;
case 15 :
active_width = 480;
active_height = 256;
vga_mode = pal_mode_576x288_50_0_0;
pattern = PATTERN_TEXT;
pixel_clk = vga_mode.default_timing->clock_freq;
max_text_chars = 60;
sprintf(line1, header, active_width, active_height, 50, (double)pixel_clk / 1000000, "+H+V-C");
sprintf(line2, "Mode %X: 192Mhz CPLD Overclock Test", mode);
set_sys_clock_khz(pixel_clk * 8 / 1000, true);
break;
}
print_string((max_text_chars - strlen(line1))*4, 0, line1, black, white);
print_string((max_text_chars - strlen(line2))*4, 8, line2, black, white);
}
uint16_t * write_gradient(uint16_t *p, uint32_t width, uint32_t colour_mask) {
for (uint bar = 0; bar < 16; bar++) {
*p++ = COMPOSABLE_COLOR_RUN;
uint32_t colour = PICO_SCANVIDEO_PIXEL_FROM_RGB4(bar, bar, bar);
*p++ = colour & colour_mask;
*p++ = width / 16 - 3;
}
return p;
}
uint16_t * write_colour_bars(uint16_t *p, uint32_t width) {
for (int bar = 7; bar >= 0; bar--) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4((bar & 0x02) ? 0xf : 0, (bar & 0x04) ? 0xf : 0, (bar & 0x01) ? 0xf : 0);
*p++ = width / 8 - 3;
}
return p;
}
uint16_t * write_grating(uint16_t *p, uint32_t width, uint32_t first_pixel, uint32_t second_pixel) {
//have to write the grating in 32 bit pairs for speed
*p++ = COMPOSABLE_RAW_RUN;
*p++ = first_pixel;
*p++ = width - 3;
if (((uint32_t) p) & 2) { //is 16 bit pointer in the middle of a 32 bit word?
*p++ = second_pixel;
uint32_t *ip = (uint32_t*)p;
for (uint i = 0; i < (width >> 1) - 1; i++) {
*ip++ = (second_pixel << 16) | first_pixel;
}
p = (uint16_t*)ip;
} else {
uint32_t *ip = (uint32_t*)p;
for (uint i = 0; i < (width >> 1) - 1; i++) {
*ip++ = (first_pixel << 16) | second_pixel;
}
p = (uint16_t*)ip;
*p++ = second_pixel;
}
return p;
}
uint16_t * write_burst_grating(uint16_t *p, uint32_t width, uint32_t first_pixel, uint32_t second_pixel) {
//have to write the grating in 32 bit pairs for speed
static int swap = 0;
*p++ = COMPOSABLE_RAW_RUN;
*p++ = first_pixel;
*p++ = width - 3;
if (((uint32_t) p) & 2) { //is 16 bit pointer in the middle of a 32 bit word?
*p++ = second_pixel;
uint32_t *ip = (uint32_t*)p;
for (uint i = 0; i < (width >> 1) - 1; i++) {
if (i & 8) {
if (swap) {
*ip++ = (second_pixel << 16) | first_pixel;
} else {
*ip++ = (first_pixel << 16) | second_pixel;
}
} else {
*ip++ = 0 ;
}
}
p = (uint16_t*)ip;
} else {
uint32_t *ip = (uint32_t*)p;
for (uint i = 0; i < (width >> 1) - 1; i++) {
if (i & 8) {
if (swap) {
*ip++ = (first_pixel << 16) | second_pixel;
} else {
*ip++ = (second_pixel << 16) | first_pixel;
}
} else {
*ip++ = 0 ;
}
}
p = (uint16_t*)ip;
*p++ = second_pixel;
}
swap ^= 1;
return p;
}
uint16_t * write_cga_bars(uint16_t *p, uint32_t width, uint32_t intensity) {
for (int bar = 7; bar >= 0; bar--) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4((bar & 0x02) ? 0x8 : 0, ((bar & 0x04) ? 0x8 : 0), (bar & 0x01) ? 0x8 : 0) | intensity;
*p++ = width / 8 - 3;
}
return p;
}
uint16_t * write_colour(uint16_t *p, uint32_t width, uint32_t colour) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = colour;
*p++ = width - 3;
return p;
}
uint16_t * write_mono_artifacts(uint16_t *p, uint32_t width, uint32_t background_colour, uint32_t foreground_colour) {
uint phase = 0;
*p++ = COMPOSABLE_RAW_RUN;
*p++ = background_colour;
*p++ = width - 3;
uint bar_width = width /16;
//fill in remaining pixels of first block
for (uint pixel = 0; pixel < (bar_width - 1); pixel++) {
*p++ = background_colour;
}
for (uint bar = 1; bar < 16; bar++) {
for (uint pixel = 0; pixel < (bar_width/4); pixel++) {
//*p++ = ((bar >> (pixel & 3)) & 1) ? foreground_colour : background_colour;
//unrolled for speed
*p++ = ((bar >> ((phase + 3) & 3)) & 1) ? foreground_colour : background_colour;
*p++ = ((bar >> ((phase + 2) & 3)) & 1) ? foreground_colour : background_colour;
*p++ = ((bar >> ((phase + 1) & 3)) & 1) ? foreground_colour : background_colour;
*p++ = ((bar >> ((phase + 0) & 3)) & 1) ? foreground_colour : background_colour;
}
}
return p;
}
uint16_t * write_four_colour_artifacts(uint16_t *p, uint32_t width, uint32_t colour_0, uint32_t colour_1, uint32_t colour_2, uint32_t colour_3) {
uint phase = 0;
*p++ = COMPOSABLE_RAW_RUN;
*p++ = colour_0;
*p++ = width - 3;
uint bar_width = width /16;
//fill in remaining pixels of first block
for (uint pixel = 0; pixel < (bar_width - 1); pixel++) {
*p++ = colour_0;
}
for (uint bar = 1; bar < 16; bar++) {
for (uint pixel = 0; pixel < (bar_width / 4); pixel++) {
//unrolled for speed
switch ((bar >> 2) & 3) {
case 0:
*p++ = colour_0;
*p++ = colour_0;
break;
case 1:
*p++ = colour_1;
*p++ = colour_1;
break;
case 2:
*p++ = colour_2;
*p++ = colour_2;
break;
case 3:
*p++ = colour_3;
*p++ = colour_3;
break;
}
switch ((bar >> 0) & 3) {
case 0:
*p++ = colour_0;
*p++ = colour_0;
break;
case 1:
*p++ = colour_1;
*p++ = colour_1;
break;
case 2:
*p++ = colour_2;
*p++ = colour_2;
break;
case 3:
*p++ = colour_3;
*p++ = colour_3;
break;
}
}
}
return p;
}
uint16_t * write_lumacode(uint16_t *p, uint32_t width) {
uint32_t colour_table[] = {
PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0),
PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x4, 0x0),
PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0),
PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x0)
};
uint phase = 0;
*p++ = COMPOSABLE_RAW_RUN;
*p++ = colour_table[0];
*p++ = width - 3;
uint bar_width = width /16;
//fill in remaining pixels of first block
for (uint pixel = 0; pixel < bar_width - 1; pixel++) {
*p++ = colour_table[0];
}
for (uint bar = 1; bar < 16; bar++) {
for (uint pixel = 0; pixel < (bar_width/2); pixel++) {
*p++ = colour_table[bar >> 2];
*p++ = colour_table[bar & 3];
}
}
return p;
}
uint16_t *write_text_block(uint16_t *p, uint line_num, uint bright) {
uint bright_mask = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8) | (PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8) << 16);
if (bright) {
bright_mask = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf) | (PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf) << 16);
}
uint16_t padding = (active_width - max_text_chars * 8) >> 1;
if (padding > 0) {
switch (padding) {
case 1:
*p++ = COMPOSABLE_RAW_1P;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
break;
case 2:
*p++ = COMPOSABLE_RAW_2P;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
break;
default:
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
*p++ = padding - 3;
break;
}
}
unsigned short *buf = &bitmap[MAX_FRAME_BUFFER_WIDTH * (line_num % 16)];
*p++ = COMPOSABLE_RAW_RUN;
//have to copy text image buffer in 32 bit pairs for speed
if (((uint32_t) p) & 2) { //is 16 bit pointer in the middle of a 32 bit word?
*p++ = *buf++;
*p++ = max_text_chars * 8 - 3;
*p++ = *buf++;
uint32_t *ip = (uint32_t*)p;
uint32_t *ibuf = (uint32_t*)buf;
for (uint i = 0; i < ((max_text_chars * 8 - 2) >> 1); i++) {
*ip++ = *ibuf++ & bright_mask;
}
p = (uint16_t*)ip;
} else {
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0); //pad with 0 so p and buf 32 bit aligned
*p++ = max_text_chars * 8 - 3;
uint32_t *ip = (uint32_t*)p;
uint32_t *ibuf = (uint32_t*)buf;
for (uint i = 0; i < ((max_text_chars * 8 - 2) >> 1); i++) {
*ip++ = *ibuf++ & bright_mask;
}
p = (uint16_t*)ip;
*p++ = *buf++;
}
if (padding > 0) {
switch (padding) {
case 1:
*p++ = COMPOSABLE_RAW_1P;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
break;
case 2:
*p++ = COMPOSABLE_RAW_2P;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
break;
default:
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0);
*p++ = padding - 3;
break;
}
}
return p;
}
void draw_test_pattern(scanvideo_scanline_buffer_t *buffer) {
// figure out 1/32 of the color value
uint line_num = scanvideo_scanline_number(buffer->scanline_id);
uint text_height = 16;
uint border_width = (vga_mode.width - active_width) >> 1;
uint border_height = (vga_mode.height - active_height) >> 1;
uint16_t *p = (uint16_t *) buffer->data;
if (pattern == PATTERN_GREY_0x0A) {
{
p = write_colour(p, vga_mode.width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xA, 0xA, 0xA));
}
} else {
if (border_width) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = border_colour;
*p++ = border_width - 3;
}
if (line_num < border_height || line_num >= (active_height + border_height)) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = border_colour;
*p++ = active_width - 3;
} else if (line_num < (border_height + text_height)) {
// = bitmap + ((line_num - border_height) * 640 / 2);
p = write_text_block(p, line_num - border_height, bright);
} else {
uint block = (line_num - border_height - text_height) * 12 / (active_height - text_height);
switch(pattern) {
default:
case PATTERN_12BIT:
{
switch (block >> 1) {
case 0 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0x0, 0x0));
break;
case 1 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xf, 0x0));
break;
case 2 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xf));
break;
case 3 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_9BIT:
{
switch (block >> 1) {
case 0 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xe, 0x0, 0x0));
break;
case 1 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xe, 0x0));
break;
case 2 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xe));
break;
case 3 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xe, 0xe, 0xe));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xe, 0xe, 0xe), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_9BIT_LOW:
{
switch (block >> 1) {
case 0 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x7, 0x0, 0x0));
break;
case 1 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x7, 0x0));
break;
case 2 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x7));
break;
case 3 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x7, 0x7, 0x7));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x7, 0x7, 0x7), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_6BIT:
{
switch (block >> 1) {
case 0 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xc, 0x0, 0x0));
break;
case 1 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x0));
break;
case 2 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xc));
break;
case 3 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xc, 0xc, 0xc));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xc, 0xc, 0xc), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_3BIT:
{
switch (block >> 1) {
case 0 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x0, 0x0));
break;
case 1 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0));
break;
case 2 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x8));
break;
case 3 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_1BIT:
{
switch (block >> 1) {
case 0 :
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 1 :
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0));
break;
case 2 :
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 3 :
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0));
break;
case 4 :
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_GRATING:
{
switch (block >> 1) {
case 0:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 1:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xf, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 2:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 3:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0xf));
break;
case 4:
p = write_colour_bars(p, active_width);
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_CGA:
{
switch (block) {
case 0 :
p = write_mono_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8));
break;
case 1 :
p = write_mono_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x8));
break;
case 2 :
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x0));
break;
case 3 :
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x4, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x0));
break;
case 4 :
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x0, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8));
break;
case 5 :
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x4, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x8));
break;
case 6:
case 7:
p = write_cga_bars(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
case 8:
case 9:
p = write_cga_bars(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x4, 0x0));
break;
default:
case 10:
case 11:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_GREY_BARS:
{
switch (block >> 1) {
case 0 :
case 1 :
case 2 :
case 3 :
case 4 :
p = write_gradient(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf));
break;
default:
case 5:
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
break;
}
}
break;
case PATTERN_FULL_GRATING:
{
p = write_grating(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0xf, 0xf, 0xf), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0));
}
break;
case PATTERN_LUMACODE:
{
p = write_lumacode(p, active_width);
}
break;
case PATTERN_APPLE_ARTIFACT:
{
p = write_mono_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xf, 0x0));
}
break;
case PATTERN_CGA_MONO:
{
if (bright) {
p = write_mono_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x8));
} else {
p = write_mono_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8));
}
}
break;
case PATTERN_CGA_4COL_PALETTE1:
{
if (bright) {
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x4, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x0));
} else {
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x0));
}
}
break;
case PATTERN_CGA_4COL_PALETTE2:
{
if (bright) {
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0xc, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x4, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0xc, 0x8));
} else {
p = write_four_colour_artifacts(p, active_width, PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x0, 0x0), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x0, 0x8, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x0, 0x8), PICO_SCANVIDEO_PIXEL_FROM_RGB4(0x8, 0x8, 0x8));
}
}
break;
case PATTERN_TEXT:
{
p = write_text_block(p, line_num - border_height, bright);
}
break;
}
}
if (border_width) {
*p++ = COMPOSABLE_COLOR_RUN;
*p++ = border_colour;
*p++ = border_width - 3;
}
}
// 32 * 3, so we should be word aligned
assert(!(3u & (uintptr_t) p));
// black pixel to end line
*p++ = COMPOSABLE_RAW_1P;
*p++ = 0;
// end of line with alignment padding
*p++ = COMPOSABLE_EOL_SKIP_ALIGN;
*p++ = 0;
buffer->data_used = ((uint32_t *) p) - buffer->data;
assert(buffer->data_used < buffer->data_max);
buffer->status = SCANLINE_OK;
}
void core1_func() {
// initialize video and interrupts on core 1
scanvideo_setup(&vga_mode);
scanvideo_timing_enable(true);
sem_release(&video_initted);
while (true) {
scanvideo_scanline_buffer_t *scanline_buffer = scanvideo_begin_scanline_generation(true);
draw_test_pattern(scanline_buffer);
scanvideo_end_scanline_generation(scanline_buffer);
}
}
int main(void) {
const uint LED_PIN = 25;
int current_mode;
stdio_init_all();
// init GPIO 0 as serial port for debugging
gpio_set_function(0, GPIO_FUNC_UART);
gpio_set_function(19, GPIO_FUNC_NULL);
gpio_set_function(20, GPIO_FUNC_NULL);
gpio_set_function(21, GPIO_FUNC_NULL);
gpio_set_function(22, GPIO_FUNC_NULL);
gpio_set_function(26, GPIO_FUNC_NULL);
gpio_set_function(27, GPIO_FUNC_NULL);
gpio_set_dir(19,0);
gpio_set_dir(20,0);
gpio_set_dir(21,0);
gpio_set_dir(22,0);
gpio_set_dir(26,0);
gpio_set_dir(27,0);
gpio_pull_up(19);