R128點(diǎn)燈指南加強(qiáng)篇——LEDC點(diǎn)三色流水燈（WS2812）

Drivers Options ?---> ? ?soc related device drivers ?---> ? ? ? ? ? ?LEDC devices ---> ? ? ? ? ? ? ? ?[*] enable ledc driver

lichee/rtos/drivers/rtos-hal/hal/source/ledc/platform/ledc_sun20iw2.h

#define LEDC_PIN ? ?GPIOA(13)#define LEDC_PINMUXSEL ?7

lichee/rtos/drivers/rtos-hal/hal/source/ledc/hal_ledc.c

struct ledc_config ledc_config = { ? ?.led_count = 4, ? ?.reset_ns = 84, ? ?.t1h_ns = 1000, ? ?.t1l_ns = 1000, ? ?.t0h_ns = 580, ? ?.t0l_ns = 1000, ? ?.wait_time0_ns = 84, ? ?.wait_time1_ns = 84, ? ?.wait_data_time_ns = 600000, ? ?.output_mode = "GRB",};

hal_ledc   <亮度>

hal_ledc 1 R 100

hal_ledc 2 G 100

lichee/rtos/projects/r128s2/module_m33/src/main.c 

lichee/rtos/projects/r128s2/module_c906/src/main.c

#include #include #include 
// 使用RGB 分量合成顏色值#define MERAGECOLOR(G, R, B) (((uint32_t)G << 16) | ((uint16_t)R << 8) | B)#define PIXEL_NUM 4
// 生成顏色uint32_t WS281x_Wheel(uint8_t wheelPos) { ?wheelPos = 255 - wheelPos; ?if (wheelPos < 85) { ? ?return MERAGECOLOR(255 - wheelPos * 3, 0, wheelPos * 3); ?} ?if (wheelPos < 170) { ? ?wheelPos -= 85; ? ?return MERAGECOLOR(0, wheelPos * 3, 255 - wheelPos * 3); ?} ?wheelPos -= 170; ?return MERAGECOLOR(wheelPos * 3, 255 - wheelPos * 3, 0);}
// 亮度設(shè)置uint32_t WS281xLSet(uint32_t rgb, float k) { ? ?uint8_t r, g, b; ? ?float h, s, v; ? ?uint8_t cmax, cmin, cdes;
 ? ?r = (uint8_t) (rgb >> 16); ? ?g = (uint8_t) (rgb >> 8); ? ?b = (uint8_t) (rgb);
 ? ?cmax = r > g ? r : g; ? ?if (b > cmax) ? ? ? ?cmax = b; ? ?cmin = r < g ? r : g; ? ?if (b < cmin) ? ? ? ?cmin = b; ? ?cdes = cmax - cmin;
 ? ?v = cmax / 255.0f; ? ?s = cmax == 0 ? 0 : cdes / (float) cmax; ? ?h = 0;
 ? ?if (cmax == r && g >= b) ? ? ? ?h = ((g - b) * 60.0f / cdes) + 0; ? ?else if (cmax == r && g < b) ? ? ? ?h = ((g - b) * 60.0f / cdes) + 360; ? ?else if (cmax == g) ? ? ? ?h = ((b - r) * 60.0f / cdes) + 120; ? ?else ? ? ? ?h = ((r - g) * 60.0f / cdes) + 240;
 ? ?v *= k;
 ? ?float f, p, q, t; ? ?float rf, gf, bf; ? ?int i = ((int) (h / 60) % 6); ? ?f = (h / 60) - i; ? ?p = v * (1 - s); ? ?q = v * (1 - f * s); ? ?t = v * (1 - (1 - f) * s); ? ?switch (i) { ? ?case 0: ? ? ? ?rf = v; ? ? ? ?gf = t; ? ? ? ?bf = p; ? ? ? ?break; ? ?case 1: ? ? ? ?rf = q; ? ? ? ?gf = v; ? ? ? ?bf = p; ? ? ? ?break; ? ?case 2: ? ? ? ?rf = p; ? ? ? ?gf = v; ? ? ? ?bf = t; ? ? ? ?break; ? ?case 3: ? ? ? ?rf = p; ? ? ? ?gf = q; ? ? ? ?bf = v; ? ? ? ?break; ? ?case 4: ? ? ? ?rf = t; ? ? ? ?gf = p; ? ? ? ?bf = v; ? ? ? ?break; ? ?case 5: ? ? ? ?rf = v; ? ? ? ?gf = p; ? ? ? ?bf = q; ? ? ? ?break; ? ?default: ? ? ? ?break; ? ?}
 ? ?r = (uint8_t) (rf * 255.0); ? ?g = (uint8_t) (gf * 255.0); ? ?b = (uint8_t) (bf * 255.0);
 ? ?return ((uint32_t) r << 16) | ((uint32_t) g << 8) | b;}
// 延時(shí)函數(shù)static inline int msleep(int ms) { ? ?vTaskDelay(ms / portTICK_RATE_MS); }
// 測(cè)試 LEDCint ledc_test_loop() { ?int i = 0, j = 0, err; ?int mode = 0; ?uint8_t R = 0, G = 0, B = 0;
 ?err = hal_ledc_init(); ?if (err) { ? ?printf("ledc init error\n"); ? ?return -1; ?}
 ?while (1) { ? ?for (j = 0; j < 256; j++) { ? ? ?for (i = 0; i < PIXEL_NUM; i++) { ? ? ? ?sunxi_set_led_brightness( ? ? ? ? ? ?i + 1, WS281xLSet(WS281x_Wheel(((i * 256 / PIXEL_NUM) + j) & 255), 0.2)); ? ? ? ?msleep(1); ? ? ?} ? ? ?msleep(10); ? ?} ?} ?return 1;}