work on pro LED, add rainbow test

apps/pro-rainbow-test/app.c

@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <string.h>
+#include "watch.h"
+
+void app_init(void) {
+}
+
+void app_wake_from_backup(void) {
+}
+
+void app_setup(void) {
+    watch_enable_leds();
+}
+
+void app_prepare_for_standby(void) {
+}
+
+void app_wake_from_standby(void) {
+}
+
+bool app_loop(void) {
+    static uint8_t red = 0;
+    static uint8_t green = 0;
+    static uint8_t blue = 255;
+    static uint8_t phase = 0;
+
+    switch (phase) {
+        case 0:
+            red++;
+            if (red == 255) phase = 1;
+            break;
+        case 1:
+            green++;
+            if (green == 255) phase = 2;
+            break;
+        case 2:
+            red--;
+            if (red == 0) phase = 3;
+            break;
+        case 3:
+            blue++;
+            if (blue == 255) phase = 4;
+            break;
+        case 4:
+            green--;
+            if (green == 0) phase = 5;
+            break;
+        case 5:
+            red++;
+            if (red == 255) phase = 6;
+            break;
+        case 6:
+            blue--;
+            if (blue == 0) {
+                phase = 1;
+            }
+            break;
+    }
+
+    watch_set_led_color_rgb(red, green, blue);
+    delay_ms(2);
+
+    return false;
+}

apps/pro-rainbow-test/make/Makefile

@@ -0,0 +1,10 @@
+TOP = ../../..
+include $(TOP)/make.mk
+
+INCLUDES += \
+  -I../
+
+SRCS += \
+  ../app.c
+
+include $(TOP)/rules.mk

watch-library/hardware/watch/watch_led.c

@@ -35,10 +35,24 @@ void watch_disable_leds(void) {
 }
 
 void watch_set_led_color(uint8_t red, uint8_t green) {
+#ifdef WATCH_BLUE_TCC_CHANNEL
+    watch_set_led_color_rgb(red, green, 0);
+#else
+    watch_set_led_color_rgb(red, green, green);
+#endif
+}
+
+void watch_set_led_color_rgb(uint8_t red, uint8_t green, uint8_t blue) {
+#ifndef WATCH_BLUE_TCC_CHANNEL
+    (void) blue; // silence warning
+#endif
     if (hri_tcc_get_CTRLA_reg(TCC0, TCC_CTRLA_ENABLE)) {
         uint32_t period = hri_tcc_get_PER_reg(TCC0, TCC_PER_MASK);
         hri_tcc_write_CCBUF_reg(TCC0, WATCH_RED_TCC_CHANNEL, ((period * red * 1000ull) / 255000ull));
         hri_tcc_write_CCBUF_reg(TCC0, WATCH_GREEN_TCC_CHANNEL, ((period * green * 1000ull) / 255000ull));
+#ifdef WATCH_BLUE_TCC_CHANNEL
+        hri_tcc_write_CCBUF_reg(TCC0, WATCH_BLUE_TCC_CHANNEL, ((period * blue * 1000ull) / 255000ull));
+#endif
     }
 }
 

watch-library/hardware/watch/watch_private.c

@@ -140,11 +140,14 @@ void _watch_enable_tcc(void) {
     //    period (i.e. a square wave with a 50% duty cycle).
     //  * LEDs on CC[2] and CC[3] can be set to any value from 0 (off) to PER (fully on).
     hri_tcc_write_WAVE_reg(TCC0, TCC_WAVE_WAVEGEN_NPWM);
-    #ifdef WATCH_INVERT_LED_POLARITY
+#ifdef WATCH_INVERT_LED_POLARITY
-    // This is here for the dev board, which uses a common anode LED (instead of common cathode like the actual watch).
+    // This is here for the dev board and Pro, which use a common anode LED (instead of common cathode like the actual watch).
     hri_tcc_set_WAVE_reg(TCC0, (1 << (TCC_WAVE_POL0_Pos + WATCH_RED_TCC_CHANNEL)) |
+#ifdef WATCH_BLUE_TCC_CHANNEL
+                               (1 << (TCC_WAVE_POL0_Pos + WATCH_BLUE_TCC_CHANNEL)) |
+#endif // WATCH_BLUE_TCC_CHANNEL
                                (1 << (TCC_WAVE_POL0_Pos + WATCH_GREEN_TCC_CHANNEL)));
-    #endif
+#endif // WATCH_INVERT_LED_POLARITY
     // The buzzer will set the period depending on the tone it wants to play, but we have to set some period here to
     // get the LED working. Almost any period will do, tho it should be below 20000 (i.e. 50 Hz) to avoid flickering.
     hri_tcc_write_PER_reg(TCC0, 1024);
@@ -152,6 +155,9 @@ void _watch_enable_tcc(void) {
     hri_tcc_write_CC_reg(TCC0, WATCH_BUZZER_TCC_CHANNEL, 0);
     hri_tcc_write_CC_reg(TCC0, WATCH_RED_TCC_CHANNEL, 0);
     hri_tcc_write_CC_reg(TCC0, WATCH_GREEN_TCC_CHANNEL, 0);
+#ifdef WATCH_BLUE_TCC_CHANNEL
+    hri_tcc_write_CC_reg(TCC0, WATCH_BLUE_TCC_CHANNEL, 0);
+#endif
     // Enable the TCC
     hri_tcc_set_CTRLA_ENABLE_bit(TCC0);
     hri_tcc_wait_for_sync(TCC0, TCC_SYNCBUSY_ENABLE);
@@ -161,6 +167,10 @@ void _watch_enable_tcc(void) {
     gpio_set_pin_function(RED, WATCH_RED_TCC_PINMUX);
     gpio_set_pin_direction(GREEN, GPIO_DIRECTION_OUT);
     gpio_set_pin_function(GREEN, WATCH_GREEN_TCC_PINMUX);
+#ifdef WATCH_BLUE_TCC_CHANNEL
+    gpio_set_pin_direction(BLUE, GPIO_DIRECTION_OUT);
+    gpio_set_pin_function(BLUE, WATCH_BLUE_TCC_PINMUX);
+#endif
 }
 
 void _watch_disable_tcc(void) {
@@ -171,6 +181,10 @@ void _watch_disable_tcc(void) {
     gpio_set_pin_function(RED, GPIO_PIN_FUNCTION_OFF);
     gpio_set_pin_direction(GREEN, GPIO_DIRECTION_OFF);
     gpio_set_pin_function(GREEN, GPIO_PIN_FUNCTION_OFF);
+#ifdef WATCH_BLUE_TCC_CHANNEL
+    gpio_set_pin_direction(BLUE, GPIO_DIRECTION_OFF);
+    gpio_set_pin_function(BLUE, GPIO_PIN_FUNCTION_OFF);
+#endif
 
     // disable the TCC
     hri_tcc_clear_CTRLA_ENABLE_bit(TCC0);

watch-library/shared/watch/watch_led.h

@@ -63,6 +63,16 @@ void watch_disable_leds(void);
   */
 void watch_set_led_color(uint8_t red, uint8_t green);
 
+/** @brief On boards with an RGB LED, sets the LED to a custom color by modulating each output's duty cycle.
+  * @param red The red value from 0-255.
+  * @param green The green value from 0-255.
+  * @param blue The blue value from 0-255.
+  * @note If you are displaying a custom color, you will need to prevent your app from going to sleep
+  *       while the LED is on; otherwise, the color will not display correctly. You can do this by
+  *       returning false in your app_loop method.
+  */
+void watch_set_led_color_rgb(uint8_t red, uint8_t green, uint8_t blue);
+
 /** @brief Sets the red LED to full brightness, and turns the green LED off.
   * @details Of the two LED's in the RG bi-color LED, the red LED is the less power-efficient one (~4.5 mA).
   */

watch-library/simulator/watch/watch_led.c

@@ -44,6 +44,11 @@ void watch_set_led_color(uint8_t red, uint8_t green) {
     }, red, green);
 }
 
+void watch_set_led_color_rgb(uint8_t red, uint8_t green, uint8_t blue) {
+    (void) blue;
+    watch_set_led_color(red, green);
+}
+
 void watch_set_led_red(void) {
     watch_set_led_color(255, 0);
 }