Add RGB pixel and brightness APIs, update Blinkt example (#1210)

* Added API to get the RGB pixel and brightness values from the blinkt interface.

* Fixed Channel object for Color object present-value which does not use coercion.

* Added API to the color-RGB library to convert from ASCII CSS color name to X,Y and brightness.

* Converted the Blinkt example app to use the basic-server.  Added a default color name command line option --color that accepts CSS color names. Set the color and brightness at startup.

* Added vacancy timer for lights using timer object defaulted to 30m and started at startup.

src/bacnet/basic/object/channel.c

@@ -662,18 +662,6 @@ bool Channel_Write_Member_Value(
                 wp_data->application_data_len = apdu_len;
                 status = true;
             }
-        } else if (
-            (wp_data->object_type == OBJECT_COLOR) &&
-            ((wp_data->object_property == PROP_PRESENT_VALUE) ||
-             (wp_data->object_property == PROP_DEFAULT_COLOR)) &&
-            (wp_data->array_index == BACNET_ARRAY_ALL)) {
-            apdu_len = bacnet_channel_value_coerce_data_encode(
-                wp_data->application_data, wp_data->application_data_len, value,
-                BACNET_APPLICATION_TAG_XY_COLOR);
-            if (apdu_len != BACNET_STATUS_ERROR) {
-                wp_data->application_data_len = apdu_len;
-                status = true;
-            }
         } else if (
             (wp_data->object_type == OBJECT_COLOR_TEMPERATURE) &&
             ((wp_data->object_property == PROP_PRESENT_VALUE) ||
@@ -761,8 +749,11 @@ static bool Channel_Write_Members(
                         }
                         debug_printf(
                             "channel[%lu].Channel_Write_Member[%u] "
-                            "%s\n",
+                            "%s-%u %s %s\n",
                             (unsigned long)object_instance, m,
+                            bactext_object_type_name(wp_data.object_type),
+                            wp_data.object_instance,
+                            bactext_property_name(wp_data.object_property),
                             bactext_error_code_name(wp_data.error_code));
                     }
                 } else {

src/bacnet/basic/sys/color_rgb.c

@@ -490,6 +490,33 @@ unsigned color_rgb_from_ascii(
     return index;
 }
 
+/**
+ * @brief Convert CSS color name to CIE xy coordinates and brightness
+ * @param x_coordinate - return x of CIE xy 0.0..1.0
+ * @param y_coordinate - return y of CIE xy 0.0..1.0
+ * @param brightness - return brightness of the CIE xy color 0..255
+ * @param name - CSS color name from W3C
+ * @return true if color name was found, false if not found
+ */
+bool color_rgb_xy_from_ascii(
+    float *x_coordinate,
+    float *y_coordinate,
+    uint8_t *brightness,
+    const char *name)
+{
+    bool status = false;
+    uint8_t r = 0, g = 0, b = 0;
+    unsigned index;
+
+    index = color_rgb_from_ascii(&r, &g, &b, name);
+    if (index < color_rgb_count()) {
+        color_rgb_to_xy(r, g, b, x_coordinate, y_coordinate, brightness);
+        status = true;
+    }
+
+    return status;
+}
+
 /**
  * @brief Convert sRGB from CIE xy and brightness
  * @param red - return R value of sRGB

src/bacnet/basic/sys/color_rgb.h

@@ -59,6 +59,13 @@ BACNET_STACK_EXPORT
 unsigned color_rgb_from_ascii(
     uint8_t *red, uint8_t *green, uint8_t *blue, const char *name);
 BACNET_STACK_EXPORT
+bool color_rgb_xy_from_ascii(
+    float *x_coordinate,
+    float *y_coordinate,
+    uint8_t *brightness,
+    const char *name);
+
+BACNET_STACK_EXPORT
 const char *color_rgb_from_index(
     unsigned target_index, uint8_t *red, uint8_t *green, uint8_t *blue);
 BACNET_STACK_EXPORT