Prvni ulozeni z chegewara githubu

libraries/ESP32/examples/RMT/RMTWriteNeoPixel/RMTWriteNeoPixel.ino

@@ -0,0 +1,100 @@
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/event_groups.h"
+#include "Arduino.h"
+
+#include "esp32-hal.h"
+
+// The effect seen in ESP32C3, ESP32S2 and ESP32S3 is like a Blink of RGB LED
+#if CONFIG_IDF_TARGET_ESP32S2
+#define BUILTIN_RGBLED_PIN   18
+#elif CONFIG_IDF_TARGET_ESP32S3
+#define BUILTIN_RGBLED_PIN   48
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define BUILTIN_RGBLED_PIN   8
+#else
+#define BUILTIN_RGBLED_PIN   21   // ESP32 has no builtin RGB LED
+#endif
+
+#define NR_OF_LEDS   8*4
+#define NR_OF_ALL_BITS 24*NR_OF_LEDS
+
+//
+// Note: This example uses Neopixel LED board, 32 LEDs chained one
+//      after another, each RGB LED has its 24 bit value 
+//      for color configuration (8b for each color)
+//
+//      Bits encoded as pulses as follows:
+//
+//      "0":
+//         +-------+              +--
+//         |       |              |
+//         |       |              |
+//         |       |              |
+//      ---|       |--------------|
+//         +       +              +
+//         | 0.4us |   0.85 0us   |
+//
+//      "1":
+//         +-------------+       +--
+//         |             |       |
+//         |             |       |
+//         |             |       |
+//         |             |       |
+//      ---+             +-------+
+//         |    0.8us    | 0.4us |
+
+rmt_data_t led_data[NR_OF_ALL_BITS];
+
+rmt_obj_t* rmt_send = NULL;
+
+void setup() 
+{
+    Serial.begin(115200);
+    
+    if ((rmt_send = rmtInit(BUILTIN_RGBLED_PIN, RMT_TX_MODE, RMT_MEM_64)) == NULL)
+    {
+        Serial.println("init sender failed\n");
+    }
+
+    float realTick = rmtSetTick(rmt_send, 100);
+    Serial.printf("real tick set to: %fns\n", realTick);
+
+}
+
+int color[] =  { 0x55, 0x11, 0x77 };  // RGB value
+int led_index = 0;
+
+void loop() 
+{
+    // Init data with only one led ON
+    int led, col, bit;
+    int i=0;
+    for (led=0; led<NR_OF_LEDS; led++) {
+        for (col=0; col<3; col++ ) {
+            for (bit=0; bit<8; bit++){
+                if ( (color[col] & (1<<(7-bit))) && (led == led_index) ) {
+                    led_data[i].level0 = 1;
+                    led_data[i].duration0 = 8;
+                    led_data[i].level1 = 0;
+                    led_data[i].duration1 = 4;
+                } else {
+                    led_data[i].level0 = 1;
+                    led_data[i].duration0 = 4;
+                    led_data[i].level1 = 0;
+                    led_data[i].duration1 = 8;
+                }
+                i++;
+            }
+        }
+    }
+    // make the led travel in the pannel
+    if ((++led_index)>=NR_OF_LEDS) {
+        led_index = 0;
+    }
+
+    // Send the data
+    rmtWrite(rmt_send, led_data, NR_OF_ALL_BITS);
+
+    delay(100);
+}