Changed to monitor the UART transmitter buffer ready flag instead of the UART transmitter empty flag. This almost doubles the speed of transmitting data to CC2420. Patch by James Brown.

core/dev/spi.h

@@ -1,5 +1,5 @@
 /* -*- C -*- */
-/* @(#)$Id: spi.h,v 1.4 2007/11/18 12:27:44 ksb Exp $ */
+/* @(#)$Id: spi.h,v 1.5 2009/08/31 12:06:34 nifi Exp $ */
 
 #ifndef SPI_H
 #define SPI_H
@@ -20,8 +20,8 @@ void spi_init(void);
 
 #define FASTSPI_TX(x)\
 	do {\
+		SPI_WAITFOREOTxBUF();\
 		SPI_TXBUF = x;\
-		SPI_WAITFOREOTx();\
 	} while(0)
 
 #define FASTSPI_RX(x)\
@@ -46,6 +46,7 @@ void spi_init(void);
         for (spiCnt = 0; spiCnt < (c); spiCnt++) {\
 			FASTSPI_TX(((u8_t*)(p))[spiCnt]);\
 		}\
+        SPI_WAITFOREOTx();\
 	} while(0)
 
 
@@ -93,6 +94,7 @@ void spi_init(void);
 		  FASTSPI_TX_ADDR(a);\
 		  FASTSPI_TX((u8_t) ((v) >> 8));\
 		  FASTSPI_TX((u8_t) (v));\
+                  SPI_WAITFOREOTx();\
 		  SPI_DISABLE();\
 	 } while (0)
 
@@ -133,6 +135,7 @@ void spi_init(void);
 		for (i = 0; i < (c); i++) {\
 		    FASTSPI_TX(((u8_t*)(p))[i]);\
 		}\
+                SPI_WAITFOREOTx();\
 		SPI_DISABLE();\
     } while (0)
 
@@ -142,6 +145,7 @@ void spi_init(void);
 		for (u8_t spiCnt = 0; spiCnt < (c); spiCnt++) {\
 		    FASTSPI_TX(((u8_t*)(p))[spiCnt]);\
 		}\
+                SPI_WAITFOREOTx();\
     } while (0)
 
 #define FASTSPI_READ_FIFO_BYTE(b)\
@@ -208,6 +212,7 @@ void spi_init(void);
 		  for (n = 0; n < (c); n++) {\
 				FASTSPI_TX(((u8_t*)(p))[n]);\
 		  }\
+                  SPI_WAITFOREOTx();\
 		  SPI_DISABLE();\
 	 } while (0)