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/TFT.cpp

Revision:
8:26757296c79d
Parent:
7:bb0383b91104
Child:
10:668cf78ff93a
--- a/Display/TFT.cpp	Tue Feb 17 11:02:06 2015 +0000
+++ b/Display/TFT.cpp	Tue Feb 17 17:54:14 2015 +0000
@@ -207,14 +207,14 @@
     wr_cmd8(0x33);
     wr_data16(topfixedareasize); //num lines of top fixed area
     wr_data16(scrollareasize+scrollbugfix); //num lines of vertical scroll area, +1 for ILI9481 fix
-    if((areasize+startY)>height()) bfa=0;
-    else bfa = height()-(areasize+startY);
+    if((areasize+startY)>screensize_Y) bfa=0;
+    else bfa = screensize_Y-(areasize+startY);
     wr_data16(bfa); //num lines of bottom fixed area
 }
 void TFT::scroll (int lines) // ie 1= scrollup 1, 479= scrolldown 1
 {
     wr_cmd8(0x37);
-    wr_data16((topfixedareasize+lines)%scrollareasize); //num lines of top fixed area
+    wr_data16(topfixedareasize+(lines%scrollareasize)); // select the (absolute)line which will be displayed as first scrollarea line 
 }
 void TFT::scrollreset()
 {