receive.c

CC2420基本收发功能的实现。mcu：msp430

/*******************************************************************
CC2420 RF receive
*******************************************************************/
#include <msp430x16x.h>

#include "cc2420init.h"
#include "cc2420run.h"
#include "cc2420const.h"
#include "port_config_CC2420.h"




void init_SPI()
{
      if (U0CTL & SYNC)
	return;
	
      U0CTL |= SYNC;    //disableUART
      U0CTL &= ~I2C;    //disableI2C
      P4DIR |= 0x02;    //p4.2->2420_CS
      P3SEL |= 0x0E;    //P3.1,2,3 MODFUNC;	
                        //TOSH_SEL_SIMO0_MODFUNC();
                        //TOSH_SEL_SOMI0_MODFUNC();
                        //TOSH_SEL_UCLK0_MODFUNC();
      IE1 &= ~(UTXIE0 | URXIE0);  // interrupt disable
		
      U0CTL = SWRST;
      U0CTL |= CHAR | SYNC | MM;  // 8-bit char, SPI-mode, USART as master
      U0CTL &= ~(0x20);
		
      U0TCTL = STC ;     // 3-pin
      U0TCTL |= CKPH;    // half-cycle delayed UCLK
		

      U0TCTL &= ~(SSEL1 | SSEL0 );
      U0TCTL |= SSEL1; // use SMCLK, assuming 1MHz

	
      U0MCTL = 0;
		
      ME1 &= ~(UTXE0 | URXE0); //USART UART module disable
      ME1 |= USPIE0;   // USART SPI module enable
      U0CTL &= ~SWRST;
		
      IFG1 &= ~(UTXIFG0 | URXIFG0);
      IE1 &= ~(UTXIE0 | URXIE0);  // interrupt disabled
    return;
}
void MCUInit(void)
{
   //using 4M external oscillator crystal
 volatile unsigned int i;



  BCSCTL1 &= ~XT2OFF;                       // XT2= HF XTAL

   while ((IFG1 & OFIFG))
  {
  IFG1 &= ~OFIFG;                           // Clear OSCFault flag
  for (i = 0xFF; i > 1; i--);               // Time for flag to set
  }
                  // OSCFault flag still set?

  BCSCTL2 |= SELM_2 +  SELS ;                        // SMCLK = MCLK= XT2 (safe) = 4M
//BCSCTL2 |= SELM_1 +DIVM_3 +DIVS_3;   
}
void hardwareinit()
{
  MCUInit();
  init_SPI();
  cc2420init();


}

void main()
{
    WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
    hardwareinit();
    P5DIR|=0X70;
    P5OUT|=0x70;
    P5OUT&=~0X10;
_EINT();
while(1);
}

#pragma vector = PORT1_VECTOR
__interrupt void FIFOP_INT(void)  //P1.0 FIFOP PKT_INT
{


 if(READ_PIN_FIFOP)//if(P1IN&PHY_FIFOP)//P1.0 FIFOP
  {
      P1IE &= ~0x01;
      HPLCC2420_readRXFIFO();
      P1IFG &= ~0x01;
      P1IE =0x01;
  }

}