Diff: main.cpp

Revision:

21:4541da183397

Parent:

20:b9d76e567637

Child:

22:abfed71656bd

--- a/main.cpp	Sat Dec 21 04:32:21 2013 +0000
+++ b/main.cpp	Thu Jan 02 00:50:09 2014 +0000
@@ -1,72 +1,74 @@
-#include "mbed.h"
-#include "WS2811.h"
-#include "Colors.h"
-
-const unsigned nLEDs = 60*4;
-
-const PinName dataOutput = PTD2;
-const PinName sckOutput = PTD1;
-SPI_Type *spiPort = SPI0;
-
-DigitalOut debugOut(PTD3);
-Serial pc(USBTX, USBRX);
+#include "mbed.h"
+#include "WS2811.h"
+#include "Colors.h"
+
+// per LED: 3x 20 mA = 60mA
+// 4x full brightness = 0.33A at 5V.
+unsigned const nLEDs = 40;
+
+// I/O pin usage
+// PTD0 TPM0 CH0 monitor
+// PTD1 TPM0 CH1 monitor
+// PTD2 data output
+// PTD3 debug output
+
+unsigned const DATA_OUT_PIN = 2; // PTD2
+
+Serial pc(USBTX, USBRX);
+
+// @brief sets different colors in each of the LEDs of a strip
+// @param strip the light strip
+// @param sat saturation, 0.0 - 1.0
+// @param brite brightness, 0.0 - 1.0
+// @param hueShift shift, 0.0 - 1.0 is equivalent to 0 - 360 degrees
+void showRainbow(WS2811 &strip, float sat, float brite, float hueShift)
+{
+    unsigned nLEDs = strip.numPixels();
+    for (unsigned i = 0; i < nLEDs; i++) {
+        uint8_t r, g, b;
+        float hue = ((float)i / (float)nLEDs) + hueShift;
+        HSBtoRGB(hue, sat, brite, &r, &g, &b);
+        strip.setPixelColor(i, LedStrip::Color(r, g, b));
+    }
+    strip.show();
+}
+
+void showTestPattern(WS2811 &strip)
+{
+    unsigned nLEDs = strip.numPixels();
+    for (unsigned i = 0; i < nLEDs; i++)
+    {
+        strip.setPixelColor(i, LedStrip::Color(0xff,0,0xAA));
+    }
+    strip.show();
+}
+
+int main(void)
+{
+    pc.baud(115200);
+    pc.printf("\r\nLEDs: %d\r\n", nLEDs);
+
+    WS2811 lightStrip(nLEDs, DATA_OUT_PIN);
+    Timer advance;
+    advance.start();
+
+    lightStrip.begin();
+
+    // time per LED is about 44 usec, with 310 usec gap between.
+    float sat = 1.0;
+    float brite = 0.25;
+    float hueShift = 0.0;
+    float hueShiftIncrement = 1.0 / (360.0 / nLEDs);
+
+    for (;;) {
+        advance.reset();
+
+        // showTestPattern(lightStrip);
+        showRainbow(lightStrip, sat, brite, hueShift);
+        hueShift += hueShiftIncrement;
+
+        while (advance.read_ms() < 100)
+            __NOP();
+   }
+}
 
-// @brief sets different colors in each of the LEDs of a strip
-// @param strip the light strip
-// @param sat saturation, 0.0 - 1.0
-// @param brite brightness, 0.0 - 1.0
-// @param hueShift shift, 0.0 - 1.0 is equivalent to 0 - 360 degrees
-void showRainbow(WS2811 &strip, float sat, float brite, float hueShift)
-{
-    unsigned nLEDs = strip.numPixels();
-    for (unsigned i = 0; i < nLEDs; i++) {
-        uint8_t r, g, b;
-        float hue = ((float)i / (float)nLEDs) + hueShift;
-        HSBtoRGB(hue, sat, brite, &r, &g, &b);
-        strip.setPixelColor(i, LedStrip::Color(r, g, b));
-    }
-    strip.begin();
-}
-void showTestPattern(WS2811 &strip)
-{
-    unsigned nLEDs = strip.numPixels();
-    for (unsigned i = 0; i < nLEDs; i++) {
-        strip.setPixelColor(i, LedStrip::Color(0xff,0,0x55));
-    }
-    strip.show();
-}
-void dump_spi_settings(SPI_Type const *spi)
-{
-    pc.printf("SPI C1=%#02x, C2=%#02x, BR=%d, S=%#02x, D=%#02x, M=%02x\r\n", spi->C1, spi->C2, spi->BR, spi->S, spi->D, spi->M);
-    pc.printf("DMA DSR_BCR=%#08lx, SAR=%p, DAR=%p, DCR=%#08lx\r\n",
-              (unsigned long)DMA0->DMA[0].DSR_BCR,
-              DMA0->DMA[0].SAR,
-              DMA0->DMA[0].DAR,
-              DMA0->DMA[0].DCR);
-}
-
-int main(void)
-{
-    pc.baud(115200);
-    pc.printf("LEDs: %d\r\n", nLEDs);
-    debugOut = 0;
-
-    //                NLEDs  MOSI        SCK
-    WS2811 lightStrip(nLEDs, spiPort, dataOutput, sckOutput);
-
-    lightStrip.begin();
-    dump_spi_settings(spiPort);
-
-    // float sat = 1.0;
-    // float brite = 0.25;
-    // float hueShift = 0.0;
-    // float hueShiftIncrement = 1.0 / (360.0 / 30.0);
-    for (;;) {
-        // debugOut = 1;
-        // showRainbow(lightStrip, sat, brite, hueShift);
-        showTestPattern(lightStrip);
-
-        // debugOut = 0;
-        // hueShift += hueShiftIncrement;
-   }
-}
\ No newline at end of file