Add support for inverted LEDS. See common anode RGB LED discussion in the Yahoo group

drivers/leds/Kconfig

@@ -48,6 +48,15 @@ config RGBLED
                 This selection enables building of the "upper-half" RGB LED driver.
                 See include/nuttx/rgbled.h for further PWM driver information.
 
+config RGBLED_INVERT
+	bool "Invert RGB LED Output"
+	depends on RGBLED
+	default n
+	---help---
+		If the board has a common anode RGB LED (a LOW output turns ON
+		each LED), this selection inverts the outputs so that the
+		colors are displayed correctly.
+
 config PCA9635PW
 	bool "PCA9635PW I2C LED Driver"
 	default n

drivers/leds/rgbled.c

@@ -304,9 +304,15 @@ static ssize_t rgbled_write(FAR struct file *filep, FAR const char *buffer,
 
   /* Convert 8bit to 16bits */
 
-  red   <<= 8;
-  green <<= 8;
-  blue  <<= 8;
+  red   = (red   << 8) | red;
+  green = (green << 8) | green;
+  blue  = (blue  << 8) | blue;
+
+#ifdef CONFIG_RGBLED_INVERT
+  red   ^= 0xffff;
+  green ^= 0xffff;
+  blue  ^= 0xffff;
+#endif
 
   /* Setup LED R */