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/PAR8.h

Revision:
20:14daa48ffd4c
Parent:
11:b842b8e332cb
Child:
25:daacdcf34e52
diff -r 1bdfb971b2c1 -r 14daa48ffd4c Protocols/PAR8.h
--- a/Protocols/PAR8.h	Mon Mar 02 10:52:26 2015 +0000
+++ b/Protocols/PAR8.h	Mon Mar 23 14:08:04 2015 +0000
@@ -96,6 +96,35 @@
     */ 
     virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd);
     
+    /** ILI932x specific, does a dummy read cycle, number of bits is protocol dependent
+    * for PAR protocols: a signle RD bit toggle
+    * for SPI8: 8clocks
+    * for SPI16: 16 clocks
+    */   
+    virtual void dummyread ();
+    
+    /** ILI932x specific, select register for a successive write or read
+    *
+    * @param reg register to be selected
+    * @param forread false = a write next (default), true = a read next
+    * @note forread only used by SPI protocols
+    */   
+    virtual void reg_select(unsigned char reg, bool forread =false);
+    
+    /** ILI932x specific, write register with data
+    *
+    * @param reg register to write
+    * @param data 16bit data
+    */   
+    virtual void reg_write(unsigned char reg, unsigned short data);
+    
+    /** ILI932x specific, read register
+    *
+    * @param reg register to be read
+    * @returns 16bit register value
+    */ 
+    virtual unsigned short reg_read(unsigned char reg);
+    
     /** HW reset sequence (without display init commands)   
     */
     virtual void hw_reset();