hal_spi.c

cc2420发程序,用来实现发射功能,单片机采用msp430!

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 *      ***   +                        CHIPCON HARDWARE ABSTRACTION LIBRARY FOR THE CC2420             *
 *      ***   + +   ***                                   Idle looping                                 *
 *      ***   +++   ***                                                                                *
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 * The Chipcon Hardware Abstraction Library is a collection of functions, macros and constants, which  *
 * can be used to ease access to the hardware on the CC2420 and the target microcontroller.            *
 *                                                                                                     *
 * This file contains a function which initialises the SPI interface on UART1.                     
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 * Compiler: MPS430-GCC or IAR C/C++ Compiler for MSP430                               
 * Target platform: MSP430FET CC2420 + any ATMEGA MCU                                                  *
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 * Revision history:                                                                                   *
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#include <include.h>

//-------------------------------------------------------------------------------------------------------
//	void halSpiInit(void)
//
//	DESCRIPTION:
//		Initalises the MSP430 Port 5/UART1 for SPI use.
//
//-------------------------------------------------------------------------------------------------------
void halSpiInit(void) {	
	U1CTL  = CHAR + SYNC + MM + SWRST;	// SW  reset, 8-bit transfer, SPI master
	U1TCTL = CKPH + SSEL1 + STC;	    // Data on Rising Edge, SMCLK, 3-wire

	U1BR0  = 0x02;		 	            // SPICLK set baud
	U1BR1  = 0;                         // Dont need baud rate control register 2 - clear it
	U1MCTL = 0;		 	                // Dont need modulation control

	P5SEL= BIT1+BIT2+BIT3;				// Select Peripheral functionality (SPI)
	P5DIR= BIT1+BIT3+BIT4;			    // Configure as outputs(SIMO,CLK,CSn)
	
	ME2   |= USPIE1;		            // Module enable
	U1CTL &= ~SWRST;	                // Remove RESET
} // SpiInit