Diff: main.cpp

Revision:

0:27f99fa5a413

Child:

1:8ad764aed49f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 17 03:08:32 2016 +0000
@@ -0,0 +1,53 @@
+/*
+ * APA102 (Adafruit DotStar LED Strip)
+ */
+
+#include "mbed.h"
+
+#define LED_NUM 100
+#define LED_GLOBAL 31 // brightness 0-31
+#define LED_FREQ 500000 // spi
+
+DigitalOut myled(LED1);
+SPI spi(P0_21, P0_22, P1_15);
+
+int led_buf[LED_NUM];
+
+void dotsStar () {
+    int i;
+
+    // start frame
+    for (i = 0; i < 4; i ++) {
+        spi.write(0);
+    }
+    // led frame
+    for (i = 0; i < LED_NUM; i ++) {
+        spi.write((7<<5) | LED_GLOBAL);
+        spi.write((led_buf[i] >> 16) & 0xff); // B
+        spi.write((led_buf[i] >> 8) & 0xff); // G
+        spi.write(led_buf[i] & 0xff); // R
+    }
+    // end frame
+    for (i = 0; i < 4; i ++) {
+        spi.write(1);
+    }
+}
+
+int main() {
+    int i, c;
+    int color = 1;
+
+    spi.frequency(LED_FREQ);
+
+    for (;;) {
+        for (i = 0; i < LED_NUM; i ++) {
+            c = ((color + i) % 7) + 1;
+            led_buf[i] = (c & 4 ? 0xff0000 : 0) | (c & 2 ? 0xff00 : 0) | (c & 1 ? 0xff : 0);
+        }
+        dotsStar();
+        myled = !myled;
+        color ++;
+        if (color > 7) color = 1;
+        wait(0.2);
+    }
+}