Darren Ulrich / UniGraphic

Added SPI burst mode to spi 8 bit.

Dependents:   Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG

Fork of UniGraphic by GraphicsDisplay

Added SPI burst mode to this graphics driver. If whoever wants this rolled in to repository let me know. I replaced _spi.write(); with fastWrite(); and clearRX();

SPI8.cpp

// need to re-create SPI firmware to access SPI handle
static SPI_HandleTypeDef SpiHandle;

void SPI8::fastWrite(int data) {
    
      SpiHandle.Instance = SPI1;
    // Check if data is transmitted
    while ((SpiHandle.Instance->SR & SPI_SR_TXE) == 0);
    SpiHandle.Instance->DR = data;
}
    
void SPI8::clearRX( void ) {
        SpiHandle.Instance = SPI1;
    //Check if the RX buffer is busy
    //While busy, keep checking
    while (SpiHandle.Instance->SR & SPI_SR_BSY){   
        // Check RX buffer readable
        while ((SpiHandle.Instance->SR & SPI_SR_RXNE) == 0);
        int dummy = SpiHandle.Instance->DR;
    }
}

Diff: Display/LCD.h

Revision:
20:14daa48ffd4c
Parent:
15:b9483ba842c8
Child:
21:ae0a4eedfc90
diff -r 1bdfb971b2c1 -r 14daa48ffd4c Display/LCD.h
--- a/Display/LCD.h	Mon Mar 02 10:52:26 2015 +0000
+++ b/Display/LCD.h	Mon Mar 23 14:08:04 2015 +0000
@@ -68,7 +68,12 @@
     */
     virtual void window(int x, int y, int w, int h);
     
-    
+    /** Read pixel color at location
+    * @param x is the horizontal offset to this pixel.
+    * @param y is the vertical offset to this pixel.
+    * @returns 16bit color, 0000=Black(pixel set), FFFF=White(pixel clear).
+    */
+    virtual unsigned short pixelread(int x, int y);
 
     /** Push a single pixel into the window and increment position.
     * You must first call window() then push pixels in loop.
@@ -139,15 +144,15 @@
     */
     int sizeX();
 
-    /** get display X size in pixels (native, orientation independent)
-    * @returns screen height in pixels.
+    /** get display Y size in pixels (native, orientation independent)
+    * @returns Y size in pixels
     */
     int sizeY();
     
 ////////////////////////////////////////////////////////////////////////////////    
     // not implemented yet
 //////////////////////////////////////////////////////////////////
-    virtual unsigned short pixelread(int x, int y){return 0;};
+  //  virtual unsigned short pixelread(int x, int y){return 0;};
     virtual void window4read(int x, int y, int w, int h){};
     void setscrollarea (int startY, int areasize){};
     void scroll (int lines){};