kopia lustrzana https://github.com/Wren6991/PicoDVI
151 wiersze
3.7 KiB
C
151 wiersze
3.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "pico/stdlib.h"
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#include "pico/multicore.h"
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#include "hardware/clocks.h"
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#include "hardware/irq.h"
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#include "hardware/sync.h"
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#include "hardware/gpio.h"
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#include "hardware/vreg.h"
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#include "pico/sem.h"
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#include "dvi.h"
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#include "dvi_serialiser.h"
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#include "common_dvi_pin_configs.h"
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#include "sprite.h"
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#include "tile.h"
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#include "map_test_zelda_mini.h"
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#include "oga_zelda_overworld_flat_rgab5515.h"
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// Pick one:
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#define MODE_640x480_60Hz
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// #define MODE_800x480_60Hz
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// #define MODE_800x600_60Hz
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// #define MODE_960x540p_60Hz
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// #define MODE_1280x720_30Hz
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#if defined(MODE_640x480_60Hz)
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// DVDD 1.2V (1.1V seems ok too)
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#define FRAME_WIDTH 320
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#define FRAME_HEIGHT 240
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#define VREG_VSEL VREG_VOLTAGE_1_20
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#define DVI_TIMING dvi_timing_640x480p_60hz
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#elif defined(MODE_800x480_60Hz)
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#define FRAME_WIDTH 400
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#define FRAME_HEIGHT 240
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#define VREG_VSEL VREG_VOLTAGE_1_20
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#define DVI_TIMING dvi_timing_800x480p_60hz
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#elif defined(MODE_800x600_60Hz)
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// DVDD 1.3V, going downhill with a tailwind
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#define FRAME_WIDTH 400
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#define FRAME_HEIGHT 300
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#define VREG_VSEL VREG_VOLTAGE_1_30
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#define DVI_TIMING dvi_timing_800x600p_60hz
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#elif defined(MODE_960x540p_60Hz)
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// DVDD 1.25V (slower silicon may need the full 1.3, or just not work)
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// Frame resolution is almost the same as a PSP :)
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#define FRAME_WIDTH 480
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#define FRAME_HEIGHT 270
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#define VREG_VSEL VREG_VOLTAGE_1_25
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#define DVI_TIMING dvi_timing_960x540p_60hz
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#elif defined(MODE_1280x720_30Hz)
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// 1280x720p 30 Hz (nonstandard)
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// DVDD 1.25V (slower silicon may need the full 1.3, or just not work)
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#define FRAME_WIDTH 640
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#define FRAME_HEIGHT 360
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#define VREG_VSEL VREG_VOLTAGE_1_25
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#define DVI_TIMING dvi_timing_1280x720p_30hz
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#else
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#error "Select a video mode!"
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#endif
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#define LED_PIN 21
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struct dvi_inst dvi0;
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void core1_main() {
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dvi_register_irqs_this_core(&dvi0, DMA_IRQ_0);
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while (queue_is_empty(&dvi0.q_colour_valid))
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__wfe();
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dvi_start(&dvi0);
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dvi_scanbuf_main_16bpp(&dvi0);
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__builtin_unreachable();
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}
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static inline int clip(int x, int min, int max) {
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return x < min ? min : x > max ? max : x;
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}
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#define N_SCANLINE_BUFFERS 4
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uint16_t static_scanbuf[N_SCANLINE_BUFFERS][FRAME_WIDTH];
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void __not_in_flash("render") render_loop() {
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uint heartbeat = 0;
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uint frame_ctr = 0;
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tilebg_t bg = {
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.xscroll = 0,
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.yscroll = 0,
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.tileset = oga_zelda_overworld_flat,
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.tilemap = map_test_zelda_mini,
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.log_size_x = 10, // 1024px, 64 tiles
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.log_size_y = 9, // 512px, 32 tiles
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.tilesize = TILESIZE_16,
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.fill_loop = (tile_loop_t)tile16_16px_alpha_loop
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};
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while (1) {
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if (++heartbeat >= 30) {
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heartbeat = 0;
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gpio_xor_mask(1u << LED_PIN);
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}
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for (uint y = 0; y < FRAME_HEIGHT; ++y) {
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uint16_t *pixbuf;
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queue_remove_blocking(&dvi0.q_colour_free, &pixbuf);
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tile16(pixbuf, &bg, y, FRAME_WIDTH);
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queue_add_blocking(&dvi0.q_colour_valid, &pixbuf);
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}
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bg.xscroll += 3;
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bg.yscroll += 2;
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++frame_ctr;
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}
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}
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int main() {
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vreg_set_voltage(VREG_VSEL);
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sleep_ms(10);
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set_sys_clock_khz(DVI_TIMING.bit_clk_khz, true);
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setup_default_uart();
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gpio_init(LED_PIN);
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gpio_set_dir(LED_PIN, GPIO_OUT);
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printf("Configuring DVI\n");
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dvi0.timing = &DVI_TIMING;
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dvi0.ser_cfg = DVI_DEFAULT_SERIAL_CONFIG;
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dvi_init(&dvi0, next_striped_spin_lock_num(), next_striped_spin_lock_num());
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printf("Core 1 start\n");
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multicore_launch_core1(core1_main);
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printf("Allocating scanline buffers\n");
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for (int i = 0; i < N_SCANLINE_BUFFERS; ++i) {
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void *bufptr = &static_scanbuf[i];
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queue_add_blocking((void*)&dvi0.q_colour_free, &bufptr);
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}
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// Core 1 will fire up the DVI once it sees the first colour buffer has been rendered
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printf("Start rendering\n");
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render_loop();
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__builtin_unreachable();
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}
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