Add rgblight mode 35 (R,G,B test mode) (#3114)

* add rgblight mode 35 (RGB cyclic mode) into quantum/rgblight.c

* Update docs, add rgblight mode 35(RGB cyclic)

* rename RGBCYCLIC to RGBTEST

1 files changed, 35 insertions, 3 deletions

diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index db66e735b..8b2a3cd9f 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -42,6 +42,8 @@ __attribute__ ((weak))
 const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {127, 63, 31};
 __attribute__ ((weak))
 const uint16_t RGBLED_GRADIENT_RANGES[] PROGMEM = {360, 240, 180, 120, 90};
+__attribute__ ((weak))
+const uint16_t RGBLED_RGBTEST_INTERVALS[] PROGMEM = {1024};
 
 rgblight_config_t rgblight_config;
 
@@ -238,14 +240,15 @@ void rgblight_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
     #ifdef RGBLIGHT_ANIMATIONS
       rgblight_timer_disable();
     #endif
-  } else if (rgblight_config.mode >= 2 && rgblight_config.mode <= 24) {
+  } else if ((rgblight_config.mode >= 2 && rgblight_config.mode <= 24) ||
+	     rgblight_config.mode == 35 ) {
     // MODE 2-5, breathing
     // MODE 6-8, rainbow mood
     // MODE 9-14, rainbow swirl
     // MODE 15-20, snake
     // MODE 21-23, knight
     // MODE 24, xmas
-    // MODE 25-34, static rainbow
+    // MODE 35  RGB test
 
     #ifdef RGBLIGHT_ANIMATIONS
       rgblight_timer_enable();
@@ -579,6 +582,9 @@ void rgblight_task(void) {
     } else if (rgblight_config.mode == 24) {
       // mode = 24, christmas mode
       rgblight_effect_christmas();
+    } else if (rgblight_config.mode == 35) {
+      // mode = 35, RGB test
+      rgblight_effect_rgbtest();
     }
   }
 }
@@ -734,4 +740,30 @@ void rgblight_effect_christmas(void) {
   rgblight_set();
 }
 
-#endif
+void rgblight_effect_rgbtest(void) {
+  static uint8_t pos = 0;
+  static uint16_t last_timer = 0;
+  static uint8_t maxval = 0;
+  uint8_t g; uint8_t r; uint8_t b;
+
+  if (timer_elapsed(last_timer) < pgm_read_word(&RGBLED_RGBTEST_INTERVALS[0])) {
+    return;
+  }
+
+  if( maxval == 0 ) {
+      LED_TYPE tmp_led;
+      sethsv(0, 255, RGBLIGHT_LIMIT_VAL, &tmp_led);
+      maxval = tmp_led.r;
+  }
+  last_timer = timer_read();
+  g = r = b = 0;
+  switch( pos ) {
+    case 0: r = maxval; break;
+    case 1: g = maxval; break;
+    case 2: b = maxval; break;
+  }
+  rgblight_setrgb(r, g, b);
+  pos = (pos + 1) % 3;
+}
+
+#endif /* RGBLIGHT_ANIMATIONS */