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: Protocols/SPI16.h

Revision:
5:b222a9461d6b
Parent:
4:12ba0ecc2c1f
Child:
6:8356d48a07db
diff -r 12ba0ecc2c1f -r b222a9461d6b Protocols/SPI16.h
--- a/Protocols/SPI16.h	Sun Feb 15 20:06:07 2015 +0000
+++ b/Protocols/SPI16.h	Mon Feb 16 00:52:24 2015 +0000
@@ -75,6 +75,19 @@
     */   
     virtual void wr_grambuf(unsigned short* data, unsigned int lenght);
     
+    /** Read 4x8bit data from display controller (with dummy cycle)
+    *
+    * @returns data as uint
+    *
+    */ 
+    virtual unsigned int rd_data32_wdummy();
+    
+    /** Read 16bit pixeldata from display controller (with dummy cycle)
+    *
+    * @returns 16bit color
+    */ 
+    virtual unsigned short rd_gram();
+    
     /** HW reset sequence (without display init commands)   
     */
     virtual void hw_reset();