hal_spi.c

来自「基于msp430f149与CC2420的无线传感器网络平台」· C语言 代码 · 共 51 行

/************************************************************************************

  Filename:     hal_spi.c

  Description:  Initialise USART1 for SPI.

************************************************************************************/

#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

/***********************************************************************************
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