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120 lines
1.8 KiB
120 lines
1.8 KiB
#include "display.h"
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#include "com/debug.h"
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#include "utils/timebase.h"
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#include "utils/meanbuf.h"
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#include <math.h>
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#define PIXEL_COUNT 30
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#define WAVEGRID_DEPTH 5
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#define WAVEGRID_LEN PIXEL_COUNT*WAVEGRID_DEPTH
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static float wavegrid[WAVEGRID_LEN];
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#define WAVE_DISSIPATION 0.011f
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static ws2812_rgb_t pixels[PIXEL_COUNT] = {};
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static MeanBuf *mb;
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void display_show(void)
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{
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for (int i = 0; i < PIXEL_COUNT; i++) {
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// 0 1 2 3 #0+i
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// 7 6 5 4 #2-i-1
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// 8 9 A B #2+i
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// F E D C #
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// G I J K
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float x = wavegrid[i] +
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wavegrid[PIXEL_COUNT*2-i-1] +
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wavegrid[PIXEL_COUNT*2+i] +
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wavegrid[PIXEL_COUNT*4-i-1] +
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wavegrid[PIXEL_COUNT*4+i];
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if (x > 255) x = 255;
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pixels[i].r = (x);
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pixels[i].b = (255.0f-x);
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}
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colorled_set_many((uint32_t*) pixels, PIXEL_COUNT);
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}
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static void handle_sonar_value(float mm)
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{
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for (int i = WAVEGRID_LEN-1; i > 0; i--) {
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wavegrid[i] = wavegrid[i-1] * (1.0f - WAVE_DISSIPATION);
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}
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float x = mm/5.0f;
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if (x>255) x = 255;
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wavegrid[0] = 255 - x;
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display_show();
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}
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static void show(void*arg)
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{
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(void)arg;
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handle_sonar_value(meanbuf_current(mb));
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}
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static void sonar(void* arg)
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{
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(void)arg;
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//info("Sonar");
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GPIOB->BSRR = GPIO_Pin_13;
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delay_us(10);
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GPIOB->BRR = GPIO_Pin_13;
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// wait for response
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bool suc = false;
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until_timeout(50) {
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if((GPIOB->IDR & (1 << 14)) != 0) {
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suc = true;
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break;
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}
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}
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if (!suc) {
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dbg("Not suc");
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return;
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}
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uint32_t cnt = 0;
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until_timeout(50) {
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if((GPIOB->IDR & (1 << 14)) == 0) break;
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cnt++;
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}
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float t = cnt / 11.2f;
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meanbuf_add(mb, t);
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}
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void display_init(void)
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{
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mb = meanbuf_create(10);
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for (int i = 0; i < WAVEGRID_LEN; i++) {
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wavegrid[i] = 0;
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}
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display_show();
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add_periodic_task(sonar, NULL, 50, true);
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add_periodic_task(show, NULL, 75, true);
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}
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