小安派Eyes-S1 LVGL控制LED

之前在屏幕上模拟控制LED，这次来试试控制真实的LED
刚好还有3个能直接用杜邦线连接的IO

接这个LED模块

初始化PWM

1. struct bflb_device_s *gpio;
   
2. struct bflb_device_s *pwm;
   
3. 
   
4. void pwm_setrgb(uint8_t r,uint8_t g,uint8_t b)
   
5. {
   
6.     bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH1, 0, 255 - r);
   
7.     bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH3, 0, 255 - b);
   
8.     bflb_pwm_v2_channel_set_threshold(pwm, PWM_CH2, 0, g);
   
9. }
   
10. void pwm_init()
    
11. {
    
12.     GLB_Set_PWM1_IO_Sel(GLB_PWM1_IO_DIFF_END);
    
13.     gpio = bflb_device_get_by_name("gpio");
    
14.     pwm = bflb_device_get_by_name("pwm_v2_0");
    
15.     bflb_gpio_init(gpio, GPIO_PIN_2, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_FLOAT | GPIO_SMT_EN | GPIO_DRV_1); //R CH1P
    
16.     bflb_gpio_init(gpio, GPIO_PIN_21, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_FLOAT | GPIO_SMT_EN | GPIO_DRV_1); //g CH2N
    
17.     bflb_gpio_init(gpio, GPIO_PIN_22, GPIO_FUNC_PWM0 | GPIO_ALTERNATE | GPIO_FLOAT | GPIO_SMT_EN | GPIO_DRV_1); //b CH3P
    
18.     struct bflb_pwm_v2_config_s cfg = {
    
19.         .clk_source = BFLB_SYSTEM_XCLK,
    
20.         .clk_div = 40,
    
21.         .period = 255,
    
22.     };
    
23.     bflb_pwm_v2_init(pwm, &cfg);
    
24.     bflb_pwm_v2_channel_positive_start(pwm, PWM_CH1);
    
25.     bflb_pwm_v2_channel_negative_start(pwm, PWM_CH2);
    
26.     bflb_pwm_v2_channel_positive_start(pwm, PWM_CH3);
    
27.     bflb_pwm_v2_start(pwm);
    
28.     pwm_setrgb(255,0,0);
    
29. }

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修改一下UI

去掉了亮度的滑条，增加了RGB值的指示文字，色环长按可以依次切换饱和度、亮度、颜色调节，因此不需要额外的亮度调节控件，双击可以复位当前颜色、饱和度或亮度
在custom.c中增加自定义代码

1. void hsv2rgb(uint16_t h, uint8_t s, uint8_t v,uint8_t *r,uint8_t *g,uint8_t *b)
   
2. {
   
3.     h %= 360; // h -> [0,360]
   
4.     uint8_t rgb_max = v * 255 / 100;
   
5.     uint8_t rgb_min = rgb_max * (100 - s) / 100;
   
6. 
   
7.     uint8_t i = h / 60;
   
8.     uint8_t diff = h % 60;
   
9. 
   
10.     // RGB adjustment amount by hue
    
11.     uint8_t rgb_adj = (rgb_max - rgb_min) * diff / 60;
    
12. 
    
13.     switch (i) {
    
14.     case 0:
    
15.         *r = rgb_max;
    
16.         *g = rgb_min + rgb_adj;
    
17.         *b = rgb_min;
    
18.         break;
    
19.     case 1:
    
20.         *r = rgb_max - rgb_adj;
    
21.         *g = rgb_max;
    
22.         *b = rgb_min;
    
23.         break;
    
24.     case 2:
    
25.         *r = rgb_min;
    
26.         *g = rgb_max;
    
27.         *b = rgb_min + rgb_adj;
    
28.         break;
    
29.     case 3:
    
30.         *r = rgb_min;
    
31.         *g = rgb_max - rgb_adj;
    
32.         *b = rgb_max;
    
33.         break;
    
34.     case 4:
    
35.         *r = rgb_min + rgb_adj;
    
36.         *g = rgb_min;
    
37.         *b = rgb_max;
    
38.         break;
    
39.     default:
    
40.         *r = rgb_max;
    
41.         *g = rgb_min;
    
42.         *b = rgb_max - rgb_adj;
    
43.         break;
    
44.     }
    
45. }
    
46. 
    
47. void custom_ColorChanged(lv_color_hsv_t hsv)
    
48. {
    
49.     uint8_t r,g,b;
    
50.     hsv2rgb(hsv.h,hsv.s,hsv.v,&r,&g,&b);
    
51.     lv_label_set_text_fmt(guider_ui.screen_label_1,"R:%d G:%d B:%d",r,g,b);
    
52.     pwm_setrgb(r,g,b);
    
53. }
    
54. 
    
55. void custom_OnOffChanged(uint8_t on)
    
56. {
    
57.     if(on == 0)
    
58.         pwm_setrgb(0,0,0);
    
59.     else
    
60.         custom_ColorChanged(lv_colorwheel_get_hsv(guider_ui.screen_cpicker_1));
    
61. }

复制代码

将色环和开关的valuechange事件分别更换为custom_ColorChanged和custom_OnOffChanged

1. static void screen_cpicker_1_event_handler (lv_event_t *e)
   
2. {
   
3.     lv_event_code_t code = lv_event_get_code(e);
   
4. 
   
5.     switch (code) {
   
6.     case LV_EVENT_VALUE_CHANGED:
   
7.     {
   
8.         custom_ColorChanged(lv_colorwheel_get_hsv(guider_ui.screen_cpicker_1));
   
9.         break;
   
10.     }
    
11.     default:
    
12.         break;
    
13.     }
    
14. }
    
15. static void screen_sw_1_event_handler (lv_event_t *e)
    
16. {
    
17.     lv_event_code_t code = lv_event_get_code(e);
    
18. 
    
19.     switch (code) {
    
20.     case LV_EVENT_VALUE_CHANGED:
    
21.     {
    
22.         if(lv_obj_has_state(guider_ui.screen_sw_1, LV_STATE_CHECKED))
    
23.             custom_OnOffChanged(1);
    
24.         else
    
25.             custom_OnOffChanged(0);
    
26.         break;
    
27.     }
    
28.     default:
    
29.         break;
    
30.     }
    
31. }

复制代码

运行效果发在了B站
https://www.bilibili.com/video/BV11i421U7g5/

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