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: Inits/IST3020.h

Revision:
1:ff019d22b275
Parent:
0:75ec1b3cde17
Child:
9:1749ae993cfe
--- a/Inits/IST3020.h	Thu Feb 12 22:22:47 2015 +0000
+++ b/Inits/IST3020.h	Fri Feb 13 15:25:10 2015 +0000
@@ -14,8 +14,8 @@
  
  public:
 
-    /** Create a PAR_8 display interface
-    * @param displayproto PAR_8 or PAR_16
+    /** Create a PAR display interface
+    * @param displayproto only supports PAR_8
     * @param port GPIO port name to use
     * @param CS pin connected to CS of display
     * @param reset pin connected to RESET of display
@@ -26,8 +26,9 @@
     */ 
     IST3020(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char* name);
   
-    /** Create an SPI_8 display interface
-    * @param displayproto SPI_8 or SPI_16
+    /** Create an SPI display interface
+    * @param displayproto only supports SPI_8
+    * @param Hz SPI speed in Hz
     * @param mosi SPI pin
     * @param miso SPI pin
     * @param sclk SPI pin
@@ -36,7 +37,7 @@
     * @param DC pin connected to data/command of display
     * @param name The name used by the parent class to access the interface
     */ 
-    IST3020(proto_t displayproto, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char* name);
+    IST3020(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char* name);