ctrl_set.c

ARM7 S3C44b0x读写硬盘的程序和说明文档

#include "inc\44b0x.h"
#include "DataType.h"

#define	EXT_OSC_CLK	10000000

unsigned int MCLK = 20000000;

void ChangePllValue(int mdiv, int pdiv, int sdiv)
{
	int i = 1;		
	
	rPLLCON = (mdiv<<12)|(pdiv<<4)|sdiv;
	
	while(sdiv--)
		i *= 2;	
	
	MCLK = (EXT_OSC_CLK*(mdiv+8))/((pdiv+2)*i);		
}



/*********************************************************/
#define RTC_YEAR0		(0x03)		//年
#define RTC_MONTH0		(0x02)		//月
#define RTC_DAY0		(0x0e)		//日
#define RTC_DATE0		(0x06)		//星期SUN:1 MON:2 TUE:3 WED:4 THU:5 FRI:6 SAT:7
#define RTC_HOUR0		(0x08)		//小时
#define RTC_MIN0		(0x08)		//分
#define RTC_SEC0		(0x08)		//秒

#define RTC_YEAR1		(0x03)		//年
#define RTC_MONTH1		(0x03)		//月
#define RTC_DAY1		(0x0e)		//日
#define RTC_DATE1		(0x06)		//星期－SUN:1 MON:2 TUE:3 WED:4 THU:5 FRI:6 SAT:7
#define RTC_HOUR1		(0x08)		//小时
#define RTC_MIN1		(0x08)		//分
#define RTC_SEC1		(0x08)		//秒

#define	RTC_RW_EN()	rRTCCON = 1		//|= 1
#define	RTC_RW_DS()	rRTCCON &= 0xfe

void RtcSetDay(TIME_STRUC *time)
{
	RTC_RW_EN();				//RTC读写使能，选择BCD时钟、计数器，无复位，1/32768		
	rBCDYEAR = time->year;;		//年
    rBCDMON  = time->month;		//月
    rBCDDAY  = time->day;		//日	
	RTC_RW_DS();
}

void RtcSetWeek(TIME_STRUC *time)
{
	RTC_RW_EN();
	rBCDDATE = time->weekday;
	RTC_RW_DS();
}

void RtcSetTime(TIME_STRUC *time)
{
	RTC_RW_EN();				//RTC读写使能，选择BCD时钟、计数器，无复位，1/32768		
	rBCDHOUR = time->hour;		//小时
    rBCDMIN  = time->min;		//分
    rBCDSEC  = time->sec;		//秒
	RTC_RW_DS();
}


void RtcInit(TIME_STRUC *time)
{
    RTC_RW_EN();				//RTC读写使能，选择BCD时钟、计数器，无复位，1/32768
    rBCDYEAR = time->year;;		//年
    rBCDMON  = time->month;		//月
    rBCDDAY  = time->day;		//日
    rBCDDATE = time->weekday;	//星期
    rBCDHOUR = time->hour;		//小时
    rBCDMIN  = time->min;		//分
    rBCDSEC  = time->sec;		//秒
    
    rTICNT = 0x80+127;		//enable tick timer interrupt, set tick timer interrupt time = (127+1)/128 second	
    RTC_RW_DS();	
}

void RtcAlarm(TIME_STRUC *time)  
{
	rALMYEAR = time->year;		//年
	rALMMON  = time->month;		//月
	rALMDAY  = time->day;		//日
	rALMHOUR = time->hour;		//小时
	rALMMIN  = time->min;		//分
	rALMSEC  = time->sec; 		//秒

	rRTCALM = 0x7f;		//全局警报使能控制，年、月、日、星期、时分秒警报使能控制
}

void RtcGetTime(TIME_STRUC *time)
{
	U8 m;

	RTC_RW_EN();		//RTC读写使能
	time->year = 2000 + rBCDYEAR;
	time->weekday = rBCDDATE;

	m = rBCDMON;	
	time->month = m;//(m>>4)*10 + (m&0xf);	//BCD码转十进制

	m = rBCDDAY;	
	time->day = m;//(m>>4)*10 + (m&0xf);	//BCD码转十进制	

	m = rBCDHOUR;	
	time->hour = m;//(m>>4)*10 + (m&0xf);	//BCD码转十进制
	
	m = rBCDMIN;	
	time->min = m;//(m>>4)*10 + (m&0xf);	//BCD码转十进制

	m = rBCDSEC;			
	time->sec = m;//(m>>4)*10 + (m&0xf);	//BCD码转十进制
	
    RTC_RW_DS();		//RTC读写禁止(降低功率消耗)，选择BCD时钟、计数器，无复位，1/32768    

}

void InitSysTimer(U8 Freq)
{		
	rTCON   &= 0xf0ffffff;			//clear manual update bit, stop Timer 5 	
	rTCFG0  &= 0xff00ffff;			//定时器4/5的预分频为16
	rTCFG0  |= (16-1)<<16;
	rTCFG1  &= 0xff0fffff;			//定时器5的MUX为1/8
	rTCFG1  |= 2<<20;	
	rTCNTB5  = MCLK/(Freq*16*8);	//定时器5的重装值,在ENABLE之前设定	
	rTCON   |= 0x02000000;			//定时器5的MANUAL UPDATE BIT设为1
	rTCON   &= 0xf0ffffff;			//MANUAL UPDATE BIT清零
	rTCON   |= 0x05000000;			//定时器5 start, 设为INTERVAL模式
}
	
#define	MaxBeepFreq	20000
#define	MinBeepFreq	20
void SetBeepPwm(U16 Freq, U8 HiRatio)
{
	if(Freq>MaxBeepFreq)
		Freq = MaxBeepFreq;
	if(HiRatio>100)
		HiRatio = 100;	
	rTCON  	&= 0xffff0fff;					// clear manual update bit, stop Timer2
	rTCFG0 	&= 0xffff00ff;					// set Timer 2&3 prescaler 0
	rTCFG1 	&= 0xfffff0ff;					// set Timer 2 MUX 1/16
	rTCFG1  |= 0x00000300;	
	rTCNTB2	 = MCLK/(Freq*16);				//if set inverter off, when TCNT2<=TCMP2, TOUT is high, TCNT2>TCMP2, TOUT is low
	rTCMPB2  = (rTCNTB2*(100-HiRatio))/100;	//if set inverter on,  when TCNT2<=TCMP2, TOUT is low,  TCNT2>TCMP2, TOUT is high
	rTCON	|= 0x00002000;					// manual update
	rTCON	&= 0xffff0fff;	  				// clear manal update bit
	rTCON   |= 0x0000d000;					// auto reload, inverter on, start Timer 5
}