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--- en:iot-open:practical:hardware:sut:stm32:emb8_1 [2024/04/20 09:36] – [Steps] ktokarz
+++ en:iot-open:practical:hardware:sut:stm32:emb8_1 [2024/04/20 09:46] (current) – [Steps] ktokarz
@@ Line 52: / Line 52: @@
 The strip class definition contains the number of pixels, the pin for transmission, and the type of LEDs. In our laboratory LEDs use Green Red Blue format of data and 800kHz data transmission frequency.
 === Step 3 ===
-To switch a particular LED, use the function ''setPixelColor()''. It accepts parameters of different types.
+To switch a particular LED, use the function ''setPixelColor();''. It accepts parameters of different types.
 <code c>
 void setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b);
@@ Line 60: / Line 60: @@
 If you use the second version you give the LED number as the first parameter and a 32-bit version of the colour information. To convert three RGB bytes to 32-bit value you can use the function ''Color();'':
 <code c>
-static uint32_t Color(uint8_t r, uint8_t g, uint8_t b)
+static uint32_t Color(uint8_t r, uint8_t g, uint8_t b);
 </code>
 <note tip>Note that the LED number is 0-based, so in the case of our laboratory equipment, valid indexes are 0...7.</note>
-The setPixelColor() sets the appropriate data in the internal buffer of the class object. Sending it to the LED stripe requires the usage of the ''show();'' function afterwards.
+The ''setPixelColor();'' sets the appropriate data in the internal buffer of the class object. Sending it to the LED stripe requires the usage of the ''show();'' function afterwards.\\
-=== Step 4 ===
+The different versions of the ''setPixelColor();'' function can look like in the following code:
-The part of the program which lights the first two LEDs red, the next two green, two blue and two white with different brightness can use the following code:
 <code c>
-    strip.setPixelColor(0, strip.Color(5, 0, 0));  //  Set pixel's color red (in RAM)
+strip.setPixelColor(0, strip.Color(10, 0, 0)); // Red
-    strip.setPixelColor(1, strip.Color(30, 0, 0)); //  Set pixel's color red (in RAM)
+strip.setPixelColor(1, 0, 10, 0);              // Green
-    strip.setPixelColor(2, strip.Color(0, 5, 0));  //  Set pixel's color green (in RAM)
+strip.setPixelColor(2, 0, 0, 10);              // Blue
-    strip.setPixelColor(3, strip.Color(0, 30, 0)); //  Set pixel's color green (in RAM)
+strip.setPixelColor(3, 0x000F0F0F);            // White
-    strip.setPixelColor(4, strip.Color(0, 0, 5));  //  Set pixel's color blue (in RAM)
+strip.show();                           // Update strip
-    strip.setPixelColor(5, strip.Color(0, 0, 30)); //  Set pixel's color blue (in RAM)
-    strip.setPixelColor(6, strip.Color(5, 5, 5));  //  Set pixel's color white (in RAM)
-    strip.setPixelColor(7, strip.Color(30, 30, 30)); //  Set pixel's color white (in RAM)
-    strip.show();                                  //  Update strip
 </code>
 ==== Result validation ====

en/iot-open/practical/hardware/sut/stm32/emb8_1.1713605802.txt.gz · Last modified: 2024/04/20 09:36 by ktokarz