main.c

f2812内部sci串口程序

#include "F281X.h"
#include "Macro.h"

extern cregister volatile Uint16 IFR;
extern cregister volatile Uint16 IER;

void initsys(void);
void initscia(void);
interrupt void receive_int(void);

main()
{
	initsys();
	initscia();
	
	while((SCICTL2A&0x40)==0);
	SCITXBUFA = 0x25;

	while(1);
}

void initsys(void)
{
	EALLOW;
	IER = 0x0000;
    IFR = 0x0000;
	PLLCR = 0x000a;
	PCLKCR = 0x0400;
	LOSPCP = 0x0002;
	GPFMUX = 0x0030;
	WDCR= 0x0068;
	asm(" C28OBJ");
	
	SetBit0_16(PIECTRL);
	// Clear all PIEIER registers:
 	PIEIER1 = 0;
	PIEIER2 = 0;
	PIEIER3 = 0;
	PIEIER4 = 0;
	PIEIER5 = 0;
	PIEIER6 = 0;
	PIEIER7 = 0;
	PIEIER8 = 0;
	PIEIER9 = 0;
	PIEIER10 = 0;
	PIEIER11 = 0;
	PIEIER12 = 0;
	// Clear all PIEIFR registers:
	PIEIFR1 = 0;
	PIEIFR2 = 0;
	PIEIFR3 = 0;
	PIEIFR4 = 0;
	PIEIFR5 = 0;
	PIEIFR6 = 0;
	PIEIFR7 = 0;
	PIEIFR8 = 0;
	PIEIFR9 = 0;
	PIEIFR10 = 0;
	PIEIFR11 = 0;
	PIEIFR12 = 0;
	
	SetBit8_16(IER);
	SetBit0_16(PIEIER9);
	
	SCIRXINTA_ISR = (unsigned long)&receive_int;
	EDIS;
}

void initscia(void)
{
	Uint16 i;
	EALLOW;
	SCICTL1A = 0x3;
	for(i=0;i<5000;i++);
	SCICCRA = 0x07;
	SCIHBAUDA = 0x0001;
	SCILBAUDA = 0x00e7;
	SCICTL2A = 0x02;
	SetBit5_16(SCICTL1A);
	EINT;
	EDIS;
}

interrupt void receive_int(void)
{
	Uint16 receive;
	DINT;
	receive = SCIRXBUFA;
	PIEACK = 0x100;
	EINT;
}