sci1.c

是用于开关磁阻电机的位置伺服控制的C语言源代码,基于CCS的开发环境.希望可以对你有所帮助.

#include "C240.h" 
/* define constant value */         
#define FALSE 0
#define TRUE  1      

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

/*********************************************/                  
void dsp_setup() 
{
 unsigned int temp;
 /*********************************************/
 /* Disable watchdog timer */
 /*********************************************/
 temp = WDCR;
 temp = temp|0x68;
 WDCR = temp;
 /*********************************************/
 /* initialize PLL module (20 MHz XTAL1) */
 /*********************************************/
 CKCR1 = 0x60;      	             /* crystal=20MHz CPUCLK = 20MHz */
                    	             /* and 1x PLL mult ratio */
 CKCR0 = 0xc3;      	             /* low–power mode 0, */
                    	             /* ACLK enabled, */
                                 	 /* PLL enabled, */
                    	             /* SYSCLK=CPUCLK/2 */
 SYSCR = 0x40c0;  
 
 XINT1CR=0x0007;
}
/*******************************************************************/
void disable_interrupts()
{
 asm(" SETC INTM");
}

/* ***************************************************************** */
/* The main program  
/* ***************************************************************** */

main()
{
unsigned int TX_data;
unsigned int RX_data;
  
disable_interrupts();
dsp_setup();
SCICCR=0x0037;  
/* 1 stop bit, none parity, 8 char bits, async mode, idle line protocol  */
SCICTL1=0x0013;
/* enable TX, RX, internal SCICLK, disable RX ERR, SLEEP, TXWAKE  */
SCICTL2=0x0000;
/* Disable RX, TX INT  */
SCIHBAUD=0x0000;  
SCILBAUD=0x0040;
/* Baud rate=19200 b/s  */
SCIPC2=0x0022; 
/* Enable TXD & RXD	 pins   */
SCICTL1=0x0033;
for(;;)  
{TX_data='?';                 /* ASCII of char '?' */
 		SCITXBUF=TX_data;}
	for(;(SCICTL2 & 0x40)!=0;);
 		TX_data='?';                 /* ASCII of char '?' */
 		SCITXBUF=TX_data; 
    
	
}