From cda3a9feb17fba211024e25b7c72112c3049d088 Mon Sep 17 00:00:00 2001
From: not-matt <32398028+not-matt@users.noreply.github.com>
Date: Mon, 18 Dec 2017 20:45:33 +0000
Subject: [PATCH] Delete ws2812_i2s.cpp

---
 ws2812_i2s.cpp | 169 -------------------------------------------------
 1 file changed, 169 deletions(-)
 delete mode 100644 ws2812_i2s.cpp

diff --git a/ws2812_i2s.cpp b/ws2812_i2s.cpp
deleted file mode 100644
index c0658e7..0000000
--- a/ws2812_i2s.cpp
+++ /dev/null
@@ -1,169 +0,0 @@
-// ws2812_lib.cpp
-//
-// main library file / contains class implementation
-//
-// Need to give credits to  Charles Lohr (https://github.com/cnlohr due 
-// to his work on his software for driving ws2812 led-strips using 
-// the i2s interface of the ESP8266.
-//
-// This inspired me to create an ESP8266 library for the Arduino IDE
-// I've added temporal dithering & gamma-correction
-// for a 'more natural' light intensity profile.
-//
-// No pin-definitions/mapings are required/possible as the library used the I2S 
-// output-pin. This pin in it's turn is shared with GPIO3 & RXD0
-//
-
-#include <Arduino.h>
-#include <stdint.h>
-#include "ws2812_i2s.h"
-#include "ws2812_defs.h"
-#include "ws2812_gamma.h"
-
-// include C-style header
-extern "C"
-{
-#include "ws2812_dma.h"
-};
-
-// class constructor
-WS2812::WS2812(void)
-{
-  // empty for now
-}
-  
-// class de-constructor
-WS2812::~WS2812(void)
-{ 
-  // empty for now
-  // TODO : should implement switching of DMA
-}
-
-// Init led-string / memory buffers etc.
-void WS2812::init(uint16_t _num_leds)
-{
-  uint8_t i;
-  uint16_t j;
-
-  num_leds = _num_leds;
-  
-  // clear zero buffer
-  for(j=0; j<NUM_I2S_ZERO_WORDS; j++)
-  {
-    i2s_zeros_buffer[j] = 0;
-  }
-
-  // do memory allocation for i2s buffer(s)
-  for(i=0; i<WS2812_DITHER_NUM; i++)
-  {
-    i2s_pixels_buffer[i] = new uint32_t[NUM_I2S_PIXEL_WORDS];
-
-    // TODO : handle memory allocation error better
-    if (i2s_pixels_buffer[i] == 0)
-    {
-      Serial.println("WS2812_I2S : ERROR ALLOCATING MEMORY");
-      return;
-    }
-    
-    for(j=0; j<NUM_I2S_PIXEL_WORDS; j++)
-    {
-      i2s_pixels_buffer[i][j] = 0;
-    } 
-  }
-
-  // set-up DMA descriptors / 1 pair per dither-factor
-  for(i=0; i<WS2812_DITHER_NUM; i++)
-  {
-    i2s_pixels_queue[i].owner     = 1;
-    i2s_pixels_queue[i].eof       = 1;
-    i2s_pixels_queue[i].sub_sof   = 0;
-    i2s_pixels_queue[i].datalen   = NUM_I2S_PIXEL_BYTES;     // Size in bytes
-    i2s_pixels_queue[i].blocksize = NUM_I2S_PIXEL_BYTES;     // Size in bytes
-    i2s_pixels_queue[i].buf_ptr   = (uint32_t)i2s_pixels_buffer[i];
-    i2s_pixels_queue[i].unused    = 0;
-    i2s_pixels_queue[i].next_link_ptr = (uint32_t)&i2s_zeros_queue[i];  // always link to zeros-buffer
-
-    i2s_zeros_queue[i].owner      = 1;
-    i2s_zeros_queue[i].eof        = 1;
-    i2s_zeros_queue[i].sub_sof    = 0;
-    i2s_zeros_queue[i].datalen    = NUM_I2S_ZERO_BYTES;      // Size in bytes)
-    i2s_zeros_queue[i].blocksize  = NUM_I2S_ZERO_BYTES;      // Size in bytes 
-    i2s_zeros_queue[i].buf_ptr    = (uint32_t)i2s_zeros_buffer;  
-    i2s_zeros_queue[i].unused     = 0;
-
-    if (i == (WS2812_DITHER_NUM-1)) // last DMA descriptor in linked list ?
-    {
-      // yes : link to first DMA descriptor
-      i2s_zeros_queue[i].next_link_ptr = (uint32_t)&i2s_pixels_queue[0];
-    }
-    else
-    {
-      // no : link to next DMA descriptor
-      i2s_zeros_queue[i].next_link_ptr = (uint32_t)&i2s_pixels_queue[i+1];
-    }
-  }
-
-  // call C based helper function
-  // I did not really succeed in putting the code from the helper
-  // funtion directly into this constructor...has something to do 
-  // with  C vs. C++
-  // the i2c_writeReg_Mask macro (+ others) failed.. see ws2812_defs.h
-  // may be I solve this later
-
-  // parameter = first entry in DMA descriptor list, i.e the descriptor list
-  ws2812_dma(i2s_pixels_queue);
-
-} 
-
-// left this comment in tact....credit to Charles
-
-// All functions below this line are Public Domain 2015 Charles Lohr.
-// this code may be used by anyone in any way without restriction or limitation.
-
-// Send out WS2812 bits with coded pulses, one nibble, then the other.
-static const uint16_t bitpatterns[16] = 
-{
-  0b1000100010001000, 0b1000100010001110, 0b1000100011101000, 0b1000100011101110,
-  0b1000111010001000, 0b1000111010001110, 0b1000111011101000, 0b1000111011101110,
-  0b1110100010001000, 0b1110100010001110, 0b1110100011101000, 0b1110100011101110,
-  0b1110111010001000, 0b1110111010001110, 0b1110111011101000, 0b1110111011101110,
-};
-
-// display the pixels
-void WS2812::show(Pixel_t *pixels)
-{
-  uint8_t *buffer;
-  uint8_t pixelbyte;
-  uint8_t gammabyte;
-  uint16_t i,b;
-  uint16_t *i2s_ptr[WS2812_DITHER_NUM];
-
-  buffer = (uint8_t *)pixels;
-
-  // set-up pointers into the i2s-pixel-buffers  
-  for(i=0; i<WS2812_DITHER_NUM; i++)
-  {
-    i2s_ptr[i] = (uint16_t *)i2s_pixels_buffer[i];
-  }
-    
-  // for every pixel in the input-array
-  // - get the pixel value (either R,G, or B)
-  // - for every dithered buffer 
-  //   get the gamma-corrected output value
-  // - and transform into i2s nibble
-  
-  for(b=0; b<NUM_RGB_BYTES; b++)
-  {
-    pixelbyte = *buffer++;
-
-    for(i=0; i<WS2812_DITHER_NUM; i++)
-    {
-      gammabyte = gamma_dither[i][pixelbyte];
-      *(i2s_ptr[i]++) = bitpatterns[ (gammabyte & 0x0f) ];
-      *(i2s_ptr[i]++) = bitpatterns[ (gammabyte>>4) & 0x0f ];
-    }
-  }
-
-}
-
-// end of file