Diff: WS2811.cpp

Revision:

15:331e139672b5

Parent:

14:c97261a9a282

--- a/WS2811.cpp	Sun Jul 28 08:38:18 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,157 +0,0 @@
-// 800 KHz WS2811 driver, kinda.
-//
-// Parameterized and modified to use soft SPI.
-// Jas Strong <jasmine@electronpusher.org>
-/*****************************************************************************/
-
-#include "LedStrip.h"
-#include "WS2811.h"
-
-extern int onewire_speed_multiplier;   // speed setting for ws2811 et al.
-
-
-WS2811::WS2811(PinName dataPin, PinName clockPin, int n) :
-    dat(dataPin),
-    clk(clockPin) {
-    // Allocate 3 bytes per pixel:
-    numLEDs = n;
-    pixels = (uint8_t *)malloc(numLEDs * 3);
-    if (pixels) {
-        memset(pixels, 0x00, numLEDs * 3); // Init to RGB 'off' state
-    }
-    // calibrate delay loops for NRZ 
-    int i;
-    guardtime.start();
-    for (i=0; i<1000; i++)
-        /* do nothing */;
-    i=guardtime.read_us();
-    printf("ws2811:  1000 iters took %d usec.\n", i);
-    bogocal = (1000 / (onewire_speed_multiplier * i * 4.2)); // iterations per bitcell (417 nsec)
-    printf("ws2811:  calibrating to %d bogojiffies.\n", bogocal);
-    
-    data_mask = dat.get_mask();
-    clock_mask = clk.get_mask();
-    data_set = dat.get_set();
-    data_clr = dat.get_clr();
-    clock_set = clk.get_set();
-    clock_clr = clk.get_clr();
-    
-}
-
-/*
- *  These chips use a one-wire protocol based on a sort of NRZ signalling- jas.
- */
- 
-void WS2811::write(uint8_t byte) {
-    
-    for (int i=0; i<8; i++) {
-        if (byte & 0x80)
-            writebit(1);
-        else
-            writebit(0);
-        byte <<= 1;
-    }
-}
-
-inline void WS2811::celldelay(void) {
-    for (volatile int i = 0; i<bogocal; i++)
-        /* do nothing */ ;
-}
-
-inline void WS2811::writebit(bool bit) {
-    // first cell is always 1
-    (*data_set) = data_mask;
-    celldelay();
-    if (bit) {
-        (*clock_set) = data_mask; // dummy, we don't care but must take constant time
-        celldelay();
-    } else {
-        (*data_clr) = data_mask;
-        celldelay();
-    }
-    // last cell is always 0
-    (*data_clr) = data_mask;
-    celldelay();
-}
-
-void WS2811::begin(void) {
-    blank();
-    show();
-}
-
-uint16_t WS2811::numPixels(void) {
-    return numLEDs;
-}
-
-void WS2811::blank(void) {
-    memset(pixels, 0x00, numLEDs * 3);
-}
-
-void WS2811::show(void) {
-    uint16_t i, nl3 = numLEDs * 3; // 3 bytes per LED
-    while (guardtime.read_us() < 50)
-        /* spin */;
-    __disable_irq();
-    for (i=0; i<nl3; i++ ) {
-        write(pixels[i]);
-    }
-    __enable_irq();
-    guardtime.reset();
-}
-
-
-uint32_t WS2811::total_luminance(void) {
-    uint32_t running_total;
-    running_total = 0;
-    for (int i=0; i<numLEDs*3; i++)
-        running_total += pixels[i];
-    return running_total;
-}
-
-// Convert R,G,B to combined 32-bit color
-uint32_t WS2811::Color(uint8_t r, uint8_t g, uint8_t b) {
-    // Take the lowest 7 bits of each value and append them end to end
-    // We have the top bit set high (its a 'parity-like' bit in the protocol
-    // and must be set!)
-    return ((uint32_t)g << 16) | ((uint32_t)r << 8) | (uint32_t)b;
-}
-
-// store the rgb component in our array
-void WS2811::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;
-    pixels[n*3+1] = r;
-    pixels[n*3+2] = b;
-}
-
-void WS2811::setPixelR(uint16_t n, uint8_t r) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3+1] = r;
-}
-
-void WS2811::setPixelG(uint16_t n, uint8_t g) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3] = g;
-}
-
-void WS2811::setPixelB(uint16_t n, uint8_t b) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3+2] = b;
-}
-
-void WS2811::setPackedPixels(uint8_t * buffer, uint32_t n) {
-    if (n >= numLEDs) return;
-    memcpy(pixels, buffer, (size_t) (n*3));
-}
-
-void WS2811::setPixelColor(uint16_t n, uint32_t c) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3  ] = (c >> 16);
-    pixels[n*3+1] = (c >>  8);
-    pixels[n*3+2] =  c;
-}