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.cpp

Revision:
3:48f3282c2be8
Parent:
2:713844a55c4e
Child:
4:12ba0ecc2c1f
--- a/Inits/IST3020.cpp	Fri Feb 13 23:17:55 2015 +0000
+++ b/Inits/IST3020.cpp	Sat Feb 14 17:42:21 2015 +0000
@@ -1,6 +1,8 @@
 #include "Protocols.h"
 #include "IST3020.h"
 
+/*this is a quite standard config, should be compatible with ST7565, except bigger screen and diff resistor ratio value*/
+
 //////////////////////////////////////////////////////////////////////////////////
 // display settings ///////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////
@@ -32,6 +34,7 @@
     locate(0,0);
 }
 // reset and init the lcd controller
+// init sequence is manufacturer specific
 void IST3020::init()
 {
     /* Start Initial Sequence ----------------------------------------------------*/
@@ -56,7 +59,7 @@
     wr_cmd8(0x2F);   //  Internal Voltage Follower ON
     wait_ms(10);
     wr_cmd8(0x20);   //  Regulor_Resistor_Select resistor ratio 20-27 20=4.5(default) 27=8.0, 0.5 steps
-    set_contrast(48);
+    set_contrast(46);
     //wr_cmd8(0x81);   //  set contrast (reference voltage register set)
     //wr_cmd8(0x20);   //  contrast 00-3F default 20