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;
    }
}

Files at this revision

API Documentation at this revision

Revision 34:7eea44b19734, committed 2017-04-28

Comitter:
trevieze
Date:
Fri Apr 28 01:45:26 2017 +0000
Parent:
33:e3b3181a57e2
Child:
35:782de649ef6f
Child:
36:0ced7cf0ec8c
Commit message:
Burst for 8 bit spi.

Changed in this revision

Protocols/SPI8.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/Protocols/SPI8.cpp	Wed Apr 12 20:18:25 2017 +0000
+++ b/Protocols/SPI8.cpp	Fri Apr 28 01:45:26 2017 +0000
@@ -111,9 +111,11 @@
         count<<=1;
         while(count)
         {
-            _spi.write(data);    // write 8bit
+            //_spi.write(data);    // write 8bit
+            fastWrite(data);
             count--;
         }
+        clearRX();
     }
     else
     {
@@ -121,11 +123,11 @@
         {
             //_spi.write(data>>8);    // write 8bit
             //_spi.write(data&0xFF);    // write 8bit
-                        fastWrite(data>>8);
-                        fastWrite(data&0xFF);
+              fastWrite(data>>8);
+              fastWrite(data&0xFF);
               count--;
         }
-                clearRX();
+        clearRX();
     }
 #ifdef USE_CS
     _CS = 1;
@@ -141,12 +143,12 @@
     {
         //_spi.write((*data)>>8);    // write 8bit
         //_spi.write((*data)&0xFF);    // write 8bit
-                fastWrite(*data>>8);
-                fastWrite(*data&0xFF);
+        fastWrite(*data>>8);
+        fastWrite(*data&0xFF);
         data++;
         lenght--;
     }
-        clearRX();
+    clearRX();
 #ifdef USE_CS
     _CS = 1;
 #endif