Jasper Wallace / LPD8806

Library for LPD8806 (and probably LPD8803/LPD8809) PWM LED driver chips, strips and pixels. Standard connected to 1st hardware SPI module. Data -> p5 and Clock -> p7 use a fixed sized buffer rather than malloc - if we use malloc rtos is unhappy...

Fork of LPD8806 by Jelmer Tiete

Diff: LPD8806.cpp

Revision:
2:5d654eba3240
Parent:
1:6ebd3ac910b6
--- a/LPD8806.cpp	Fri Dec 16 10:26:35 2011 +0000
+++ b/LPD8806.cpp	Fri May 30 03:37:16 2014 +0000
@@ -20,10 +20,17 @@
 
 LPD8806::LPD8806(uint16_t n) {
     // Allocate 3 bytes per pixel:
-    if (NULL != (pixels = (uint8_t *)malloc(numLEDs * 3))) {
+//    if (NULL != (pixels = (uint8_t *)malloc(numLEDs * 3))) {
         memset(pixels, 0x80, numLEDs * 3); // Init to RGB 'off' state
         numLEDs     = n;
-    }
+//    }
+}
+
+int LPD8806::pixels_ok(void) {
+    if (pixels != NULL)
+        return 1;
+    else
+        return 0;
 }
 
 void LPD8806::begin(void) {
@@ -61,7 +68,7 @@
 
     // We need to have a delay here, a few ms seems to do the job
     // shorter may be OK as well - need to experiment :(
-// wait_ms(3);
+    wait_ms(3);
 }
 
 // Convert R,G,B to combined 32-bit color
@@ -76,15 +83,15 @@
 void LPD8806::setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b) {
     if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
 
-    pixels[n*3  ] = g | 0x80;
-    pixels[n*3+1] = r | 0x80;
-    pixels[n*3+2] = b | 0x80;
+    pixels[(n * 3)    ] = g | 0x80;
+    pixels[(n * 3) +1 ] = r | 0x80;
+    pixels[(n * 3) +2 ] = b | 0x80;
 }
 
 void LPD8806::setPixelColor(uint16_t n, uint32_t c) {
     if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
 
-    pixels[n*3  ] = (c >> 16) | 0x80;
-    pixels[n*3+1] = (c >>  8) | 0x80;
-    pixels[n*3+2] =  c        | 0x80;
+    pixels[(n * 3)    ] = ((c >> 16) & 0xff)| 0x80;
+    pixels[(n * 3) + 1] = ((c >>  8) & 0xff)| 0x80;
+    pixels[(n * 3) + 2] = ( c        & 0xff)| 0x80;
 }