Diff: LPD8806_fast.cpp

Revision:

10:5b3be78ce6bd

Parent:

9:9038105d14bc

--- a/LPD8806_fast.cpp	Sun Mar 09 22:34:04 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,216 +0,0 @@
-// Mbed library to control LPD8806-based RGB LED Strips
-// (c) 2011 Jelmer Tiete
-// This library is ported from the Arduino implementation of Adafruit Industries
-// found at: http://github.com/adafruit/LPD8806
-// and their strips: http://www.adafruit.com/products/306
-// Released under the MIT License: http://mbed.org/license/mit
-//
-// Parameterized and modified to use soft SPI.
-// Jas Strong <jasmine@electronpusher.org>
-// Then remonstered to use hardware SPI for blast mode.
-//
-/*****************************************************************************/
-
-#include "LedStrip.h"
-#include "LPD8806_fast.h"
-#include "board_variant.h"
-
-#include "MODDMA.h"
-
-#define LATCHNUMBER 32
-
-// DMA controller and frequency setting
-extern MODDMA dma;
-extern int turbo_mode;
-extern int current_strip_fill;
-
-/*
-    PixelPusher 3 pin names:
-
-    STRIP1C = P2_9,
-    STRIP1D = P4_29,
-    STRIP2C = P0_18,
-    STRIP2D = P2_1,
-    STRIP3C = P2_6,
-    STRIP3D = P0_8,
-    STRIP4C = P2_8,
-    STRIP4D = P0_7,
-    STRIP5C = P0_15,
-    STRIP5D = P2_0,
-    STRIP6C = P0_17,
-    STRIP6D = P2_4,
-    STRIP7C = P2_5,
-    STRIP7D = P0_9,
-    STRIP8C = P2_7,
-    STRIP8D = P0_6,
-    
-*/
-
-/*
- *  STRIP7D is P0[9] which is SSP1 MOSI
- *  STRIP4D is P0[7] which is SSP1 SCK
- *
- *  STRIP2C is P0[18] which is SSP0 MOSI
- *  STRIP5C is P0[15] which is SSP0 SCK
- */ 
- 
- // when the transfer is complete, kill the channel.
-void dma_complete_callback() {
-    MODDMA_Config *config = dma.getConfig();
-    dma.Disable( (MODDMA::CHANNELS)config->channelNum() );
-    
-    // clear the IRQ flags
-    if (dma.irqType() == MODDMA::TcIrq) dma.clearTcIrq();    
-    if (dma.irqType() == MODDMA::ErrIrq) dma.clearErrIrq();  
-}
- 
-void dma_err_callback() {
-    MODDMA_Config *config = dma.getConfig();
-    dma.Disable( (MODDMA::CHANNELS)config->channelNum() );
-    
-    // clear the IRQ flags
-    if (dma.irqType() == MODDMA::TcIrq) dma.clearTcIrq();    
-    if (dma.irqType() == MODDMA::ErrIrq) dma.clearErrIrq();  
-} 
-
-LPD8806_fast::LPD8806_fast(PinName dataPin, PinName clockPin, int n) :
-    _spi(dataPin, NC, clockPin)
- {
-    // Allocate 3 bytes per pixel plus latch bytes
-    numLEDs = n;
-    pixels = (uint8_t *)malloc(numLEDs * 3 + ((numLEDs + LATCHNUMBER-1) / LATCHNUMBER));
-    if (pixels) {
-        memset(pixels, 0x80, numLEDs * 3); // Init to RGB 'off' state
-        memset(pixels+numLEDs*3, 0x0, (numLEDs + LATCHNUMBER-1) / LATCHNUMBER); // latch data
-    }
-        
-    _spi.format(8,0);
-    _spi.frequency(turbo_mode*1000000);
-    
-    // remember which strip we are
-    strip_num = current_strip_fill;
-    
-    // make a new DMA config
-    dma_config = new MODDMA_Config;
-}
- 
-inline void LPD8806_fast::write(uint8_t byte) {
-    _spi.write(byte);
-}
-
-/*
-inline void LPD8806_fast::write(uint8_t byte) {
-    for (int i=0; i<8; i++) {
-        clk = 0;
-        dat = (byte & 0x80);
-        clk = 1;
-        byte <<= 1;
-    }
-    clk = 0;
-}*/
-
-void LPD8806_fast::begin(void) {
-
-    blank();
-    show();
-    show();
-}
-
-uint16_t LPD8806_fast::numPixels(void) {
-    return numLEDs;
-}
-
-void LPD8806_fast::blank(void) {
-    memset(pixels, 0x80, numLEDs * 3);
-}
-
-// Set up the DMA controller;  we only have two SSP peripherals, so only two strips.
-
-void LPD8806_fast::show(void) {
-     if (strip_num == 0) {
-        dma_config  -> channelNum   (MODDMA::Channel_0)
-                    -> srcMemAddr   ( (uint32_t) pixels )
-                    -> dstMemAddr   ( MODDMA::SSP0_Tx )
-                    -> transferSize (numLEDs * 3 + ((numLEDs + LATCHNUMBER-1) / LATCHNUMBER))
-                    -> transferType (MODDMA::m2p)
-                    -> dstConn      (MODDMA::SSP0_Tx)
-                    -> attach_tc    (&dma_complete_callback)
-                    -> attach_err   (&dma_err_callback);
-       LPC_SSP0->DMACR = (1<<1)|(1<<0); // TX,RXDMAE
-    } else {
-        dma_config  -> channelNum   (MODDMA::Channel_1)
-                    -> srcMemAddr   ( (uint32_t) pixels )
-                    -> dstMemAddr   ( MODDMA::SSP1_Tx )
-                    -> transferSize (numLEDs * 3 + ((numLEDs +LATCHNUMBER-1) / LATCHNUMBER))
-                    -> transferType (MODDMA::m2p)
-                    -> dstConn      (MODDMA::SSP1_Tx)
-                    -> attach_tc    (&dma_complete_callback)
-                    -> attach_err   (&dma_err_callback);
-       LPC_SSP1->DMACR = (1<<1)|(1<<0); // TX,RXDMAE
-    }
-    while (dma.Enabled(dma_config->channelNum())) {
-        __nop();
-    }
-    dma.Setup(dma_config);
-    dma.Enable(dma_config);
-}
-
-// LPD8806 is 7-bit, so we shift to normalize to 256 PWM steps.
-uint32_t LPD8806_fast::total_luminance(void) {
-    uint32_t running_total;
-    running_total = 0;
-    for (int i=0; i<numLEDs*3; i++)
-        running_total += ((pixels[i] & 0x7f) <<1);
-    return running_total;
-}
-
-// Convert R,G,B to combined 32-bit color
-uint32_t LPD8806_fast::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 0x808080 | ((uint32_t)(g>>1) << 16) | ((uint32_t)(r>>1) << 8) | (uint32_t)(b>>1);
-}
-
-// store the rgb component in our array
-void LPD8806_fast::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>>1) | 0x80;
-    pixels[n*3+1] = (r>>1) | 0x80;
-    pixels[n*3+2] = (b>>1) | 0x80;
-}
-
-void LPD8806_fast::setPixelR(uint16_t n, uint8_t r) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3+1] = (r>>1) | 0x80;
-}
-
-void LPD8806_fast::setPixelG(uint16_t n, uint8_t g) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3] = (g>>1) | 0x80;
-}
-
-void LPD8806_fast::setPixelB(uint16_t n, uint8_t b) {
-    if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
-
-    pixels[n*3+2] = (b>>1) | 0x80;
-}
-
-// Set all in one function call, assuming GRB ordering
-void LPD8806_fast::setPackedPixels(uint8_t * buffer, uint32_t n) {
-    if (n >= numLEDs) return;
-    for (int i=0; i<n*3; i++)
-        buffer[i] = (buffer[i] >> 1) | 0x80;
-    memcpy(pixels, buffer, (size_t) (n*3));
-}
-
-void LPD8806_fast::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;
-}