From a6e0fadb82c84cdda55258153b2d7a51006baaf2 Mon Sep 17 00:00:00 2001
From: victorpv <victor_pv@hotmail.com>
Date: Wed, 27 May 2015 20:05:35 -0500
Subject: [PATCH] Reverts changes to the ILI9341 library that should not use
 DMA.

---
 .../Adafruit_ILI9341/Adafruit_ILI9341.cpp     | 74 ++++++-------------
 .../Adafruit_ILI9341/Adafruit_ILI9341.h       |  1 +
 2 files changed, 24 insertions(+), 51 deletions(-)

diff --git a/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.cpp b/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.cpp
index 4233716..4f1e146 100644
--- a/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.cpp
+++ b/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.cpp
@@ -253,7 +253,7 @@ void Adafruit_ILI9341::begin(void) {
   writedata(0x10);   //SAP[2:0];BT[3:0] 
  
   writecommand(ILI9341_VMCTR1);    //VCM control 
-  writedata(0x3e); //对比度调节
+  writedata(0x3e); //???????
   writedata(0x28); 
   
   writecommand(ILI9341_VMCTR2);    //VCM control2 
@@ -327,11 +327,9 @@ void Adafruit_ILI9341::begin(void) {
 void Adafruit_ILI9341::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1,
  uint16_t y1) {
 
-  byte buf[4];
   writecommand(ILI9341_CASET); // Column addr set
   *dcport |=  dcpinmask;
   *csport &= ~cspinmask;
-		
   SPI.write(x0 >> 8);
   SPI.write(x0 & 0xFF);     // XSTART 
   SPI.write(x1 >> 8);
@@ -340,13 +338,11 @@ void Adafruit_ILI9341::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1,
   writecommand(ILI9341_PASET); // Row addr set
   *dcport |=  dcpinmask;
   *csport &= ~cspinmask;
-  
   SPI.write(y0>>8);
   SPI.write(y0);     // YSTART
   SPI.write(y1>>8);
   SPI.write(y1);     // YEND
 
-
   writecommand(ILI9341_RAMWR); // write to RAM
 }
 
@@ -437,58 +433,33 @@ void Adafruit_ILI9341::fillScreen(uint16_t color) {
 }
 
 // fill a rectangle
-void Adafruit_ILI9341::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,  uint16_t color) {
+void Adafruit_ILI9341::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
+  uint16_t color) {
 	int numPixels;
+  // rudimentary clipping (drawChar w/big text requires this)
+  if((x >= _width) || (y >= _height)) return;
+  if((x + w - 1) >= _width)  w = _width  - x;
+  if((y + h - 1) >= _height) h = _height - y;
 
-	unsigned char *buff;
+  if (hwSPI) spi_begin();
+  setAddrWindow(x, y, x+w-1, y+h-1);
 
-	// rudimentary clipping (drawChar w/big text requires this)
-	if((x >= _width) || (y >= _height)) return;
-	if((x + w - 1) >= _width)  w = _width  - x;
-	if((y + h - 1) >= _height) h = _height - y;
+  uint8_t hi = color >> 8, lo = color;
 
-	if (hwSPI) spi_begin();
-	setAddrWindow(x, y, x+w-1, y+h-1);
-
-	uint8_t hi = color >> 8, lo = color;
+  *dcport |=  dcpinmask;
+  *csport &= ~cspinmask;
   
-	*dcport |=  dcpinmask;
-	*csport &= ~cspinmask;
-	if (true)
+  for(y=h; y>0; y--) 
+  {
+    for(x=w; x>0; x--)
 	{
-		// Use DMA
-		byte txBuf[h*2];// Buffer to be sent via DMA
-		byte rxBuf[h*2];// Buffer to be sent via DMA
-	  
-	    // need to build a buffer of the required height  (h) 
-		// Note I suspect there is a faster way to do this
-		for(int i=0;i<h*2;i++)
-		{
-			txBuf[i++] = hi&0xff;
-			txBuf[i]   = lo&0xff;
-		}
-		// Tansfer each line by DMA
-		for(int i=0;i<w;i++)
-		{
-			//memcpy(rxBuf,txBuf,h*2);
-			SPI.DMATransfer(txBuf,rxBuf,h*2);
-		}
-	}
-	else
-	{
-		// Non DMA method (currently not used)
-		for(y=h; y>0; y--) 
-		{
-			for(x=w; x>0; x--)
-			{
-				SPI.write(hi);
-				SPI.write(lo);
-			}
-		}	
-	}
-	
-	if (hwSPI) spi_end();
-	*csport |= cspinmask;
+      SPI.write(hi);
+      SPI.write(lo);
+    }
+  }
+  
+  if (hwSPI) spi_end();
+  *csport |= cspinmask;
 }
 
 
@@ -658,3 +629,4 @@ uint8_t Adafruit_ILI9341::readcommand8(uint8_t c, uint8_t index) {
  }
  
  */
+
diff --git a/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.h b/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.h
index 1ce359a..1e9bf60 100644
--- a/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.h
+++ b/STM32F1/libraries/Adafruit_ILI9341/Adafruit_ILI9341.h
@@ -167,3 +167,4 @@ class Adafruit_ILI9341 : public Adafruit_GFX {
 };
 
 #endif
+