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/LCD.cpp

Revision:
20:14daa48ffd4c
Parent:
18:ffa58f1a680a
Child:
21:ae0a4eedfc90
--- a/Display/LCD.cpp	Mon Mar 02 10:52:26 2015 +0000
+++ b/Display/LCD.cpp	Mon Mar 23 14:08:04 2015 +0000
@@ -243,15 +243,17 @@
     // first check parameter
     if((x >= screensize_X) || (y >= screensize_Y)) return;
 
-//    if(draw_mode == NORMAL)
-//    {
-        if(color) buffer[(x + ((y>>3)*screensize_X))^1] &= ~(1 << (y&7));  // erase pixel
-        else buffer[(x + ((y>>3)*screensize_X))^1] |= (1 << (y&7));   //Black=0000, set pixel
-//    }
-//    else
-//    { // XOR mode
-//        if(color == 1) buffer[x + ((y>>3) * screensize_X)] ^= (1 << (y&7));   // xor pixel
-//    }
+    if(color) buffer[(x + ((y>>3)*screensize_X))^1] &= ~(1 << (y&7));  // erase pixel
+    else buffer[(x + ((y>>3)*screensize_X))^1] |= (1 << (y&7));   //Black=0000, set pixel
+}
+unsigned short LCD::pixelread(int x, int y)
+{
+    if(!(orientation&1)) SWAP(x,y);
+    // first check parameter
+    if((x >= screensize_X) || (y >= screensize_Y)) return 0;
+    
+    if((buffer[(x + ((y>>3)*screensize_X))^1] & (1 << (y&7)))==0) return 0xFFFF ;  // pixel not set, White
+    else return 0; // pixel set, Black
 }
 void LCD::copy_to_lcd(void)
 {