http://forums.leaflabs.com/topic.php?id=2267 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:27:08 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=2267#post-11973 Tue, 24 Jul 2012 17:31:51 +0000 gbulmer 11973@http://forums.leaflabs.com/ <p>jfenwick - please try to reduce the program to a much smaller example.<br /> Also what are the symptoms of "data from one is bleeding into the other"? </p> http://forums.leaflabs.com/topic.php?id=2267#post-11972 Tue, 24 Jul 2012 16:34:58 +0000 jfenwick 11972@http://forums.leaflabs.com/ <p>I'm using both SPI1 and SPI2 on a Maple r5 to control some WS2801 LED strips.</p> <p>I'm able to update both strips, but data from one is bleeding into the other.</p> <p>What could be causing this?</p> <p>Here is the code:</p> <pre><code>#include &lt;stdlib.h&gt; #include &lt;string.h&gt; struct CRGB { uint8 b; uint8 g; uint8 r; }; struct CRGB *leds; struct CRGB *leds_2; float Rval,Gval,Bval; int inByte = 0; // incoming serial byte // Use SPI port number 1 HardwareSPI spi_1(1); HardwareSPI spi_2(2); //const int numLEDs_1 = 50; const int numLEDs_1 = 248; //const int numLEDs_1 = 518; //const int numLEDs_1 = 270; const int numLEDs_2 = 270; int time_since_last = 0; //uint8 * pixels_1; void setup() { leds = (struct CRGB*)malloc(numLEDs_1); leds_2 = (struct CRGB*)malloc(numLEDs_2); //spi_1.begin(SPI_562_500KHZ, MSBFIRST, SPI_MODE_0); //spi_1.begin(SPI_1_125MHZ, MSBFIRST, SPI_MODE_0); spi_1.begin(SPI_2_25MHZ, MSBFIRST, SPI_MODE_0); spi_2.begin(SPI_2_25MHZ, MSBFIRST, SPI_MODE_0); memset(leds, 0, numLEDs_1 * 3); memset(leds_2, 0, numLEDs_2 * 3); show_leds(); //establishContact(); // Send a byte to establish contact until receiver responds } void loop() { /* if (SerialUSB.available() &gt; 0) { // get incoming byte: inByte = SerialUSB.read(); if (inByte == &#39;A&#39;) { blue_strip(); time_since_last = 0; } else if (inByte == &#39;B&#39;) { rainbow_hsl(); time_since_last = 0; } } else { if (time_since_last &gt; 10000000) { rainbow_hsl(); } time_since_last++; } */ /* for (int i=0; i&lt;3; i++) { memset(leds, 0, numLEDs_1 * 3); switch(i % 3) { case 0: leds[0].r = 255; break; case 1: leds[0].g = 255; break; case 2: leds[0].b = 255; break; } delay(500); } */ rainbow_hsl(); //rainbow_hsl2(); //blue_strip2(); //delay(10); } void audio_response(int amp) { int scaled = map(amp, 0, 127, 0, numLEDs_1); memset(leds, 0, numLEDs_1 * 3); leds[scaled].b = 255; show_leds(); delay(10); } void blue_strip() { // blue one at a time down the strand for (int i=0; i&lt;numLEDs_1; i++) { memset(leds, 0, numLEDs_1 * 3); leds[i].b = 255; show_leds(); delay(100); } } void blue_strip2() { // blue one at a time down the strand for (int i=0; i&lt;numLEDs_2; i++) { memset(leds, 0, numLEDs_1 * 3); memset(leds_2, 0, numLEDs_2 * 3); leds_2[i].b = 255; show_leds(); delay(10); } } /* void two_strip_test() { // blue one at a time down the strand for (int i=0; i&lt;numLEDs_2; i++) { memset(leds_2, 0, numLEDs_2 * 3); leds_2[i].b = 255; show_leds(); delay(100); } } */ void rainbow_hsl() { // fade red in memset(leds, 0, numLEDs_1 * 3); for(int k = 0; k &lt; 256; k++) { for(int i = 0; i &lt; numLEDs_1; i++ ) { leds[i].r = k; } show_leds(); //show_leds_2(); delay(10); } // cycle through colors float hue = 0.0; for (int i=0; i&lt;100; i++) { memset(leds, 0, numLEDs_1 * 3); hue = i / 100.0; hslToRgb(hue, 1.0, 0.5); for (int j=0; j&lt;numLEDs_1; j++) { leds[j].r = Rval; leds[j].g = Gval; leds[j].b = Bval; } show_leds(); //show_leds_2(); delay(50); } // fade red out memset(leds, 0, numLEDs_1 * 3); for(int k = 255; k &gt;= 0; k--) { for(int i = 0; i &lt; numLEDs_1; i++ ) { leds[i].r = k; } show_leds(); //show_leds_2(); delay(10); } } void rainbow_hsl2() { // fade red in memset(leds, 0, numLEDs_1 * 3); memset(leds_2, 0, numLEDs_2 * 3); for(int k = 0; k &lt; 256; k++) { for(int i = 0; i &lt; numLEDs_2; i++ ) { leds_2[i].r = k; } show_leds(); delay(10); } // cycle through colors float hue = 0.0; for (int i=0; i&lt;100; i++) { memset(leds_2, 0, numLEDs_2 * 3); hue = i / 100.0; hslToRgb(hue, 1.0, 0.5); for (int j=0; j&lt;numLEDs_2; j++) { leds_2[j].r = Rval; leds_2[j].g = Gval; leds_2[j].b = Bval; } show_leds(); delay(50); } // fade red out memset(leds_2, 0, numLEDs_2 * 3); for(int k = 255; k &gt;= 0; k--) { for(int i = 0; i &lt; numLEDs_2; i++ ) { leds_2[i].r = k; } show_leds(); delay(10); } } void show_leds() { for (int j=0; j&lt;numLEDs_1; j++) { spi_1.write(leds[j].b); spi_1.write(leds[j].g); spi_1.write(leds[j].r); } /* for (int j=0; j&lt;numLEDs_2; j++) { spi_2.write(leds_2[j].b); spi_2.write(leds_2[j].g); spi_2.write(leds_2[j].r); } */ } void show_leds_2() { for (int j=0; j&lt;numLEDs_2; j++) { spi_2.write(leds_2[j].b); spi_2.write(leds_2[j].g); spi_2.write(leds_2[j].r); } } void hslToRgb(float h, float s, float l){ float r, g, b; if(s == 0){ r = g = b = l; // achromatic } else{ float q = l &lt; 0.5 ? l * (1.0 + s) : l + s - l * s; float p = 2.0 * l - q; r = hue2rgb(p, q, h + 1.0/3.0); g = hue2rgb(p, q, h); b = hue2rgb(p, q, h - 1.0/3.0); } Rval = r * 255.0; Gval = g * 255.0; Bval = b * 255.0; } float hue2rgb(float p, float q, float t){ if(t &lt; 0) t += 1; if(t &gt; 1) t -= 1; if(t &lt; 1.0/6.0) return p + (q - p) * 6.0 * t; if(t &lt; 1.0/2.0) return q; if(t &lt; 2.0/3.0) return p + (q - p) * (2.0/3.0 - t) * 6.0; return p; } void establishContact() { while (SerialUSB.available() &lt;= 0) { SerialUSB.print(&#39;A&#39;, BYTE); // send a capital A delay(300); } }</code></pre>