sig_main.c

89c2051控制的DDS信号发生芯片AD98

//#include <absacc.h>
#include <AT89x051.H>
#include <INTRINS.H>

#include "SIGNAL.h"

//晶体为12MHZ

//extern unsigned int guiSweepCurrentFreqHigh;
extern unsigned long gulSweepCurrentFreqWord;

uchar    mucTime5ms;
//uchar    mucTime100ms;
//uchar    mucTime1s;
//uchar    mucTime60s;

uchar    muc1msDelay;
uchar    muc100msDelay;
//uchar    muc1sDelay;
//uchar    muc60sDelay;
uchar  mucSweep100msDelay;

uchar	mucFlashBit;
ulong	mulFreq;

uchar gucKeyStatus;

uchar     mucInputNumber[MAX_INPUT_NUMBERS];
uchar     mucWaveMode;
bit       mbDispWaveModeFlag;
bit		mbDispFreqFlag;
bit		mbFreqUpdateFlag;

uchar     gucFunction;


//12MHz晶振
//i　　delay time/us
//1　　5
//2　　7
//3　　9
/*
void delay_3add_2i_us(unsigned char i)
{
	while(--i);
}
*/
//i　　delay time/us
//0　　6+4
//1　　12
//2　　18
/*
void delay_6us(unsigned char i)
{
for(; i != 0; i--);
}
*/

//定时器0中断延时n*1ms,最大值为256ms
void delay_ms(uchar n)
{
 	for(muc1msDelay=0;muc1msDelay<n;);
}
//定时器0延时n*100ms,最大值为25600ms=25.6s
void delay_100ms(uchar n)
{
 	for(muc100msDelay=0;muc100msDelay<n;);
}
/*
//定时器0延时n*1s,最大值为256s=约4.27分钟
void delay_1s(uchar n)
{
 	for(muc1sDelay=0;muc1sDelay<n;);
}
*/
void init_device(void)
{
	//晶体为24MHZ
	//定时器0工作在方式1，作为16位定时器
	TMOD=0x01;
    	TL0=-(10000%256);//5ms中断一次
    	TH0=-(10000/256);
    	TR0=1;		//启动定时器0
    	ET0=1;     	//允许定时器0中断
	EA=1;
	mucTime5ms=0;            //5毫秒计数器
	//mucTime100ms=0;          //100毫秒计数器
	//mucTime1s=0;             //秒计数器
}
//晶体为24MHZ
void time0(void) interrupt 1 using 1
{
    	TL0=-(10000%256);//5ms中断一次
    	TH0=-(10000/256);
	mucTime5ms++;
	muc1msDelay+=5;
	if(mucTime5ms>=20)
	{
		mucTime5ms=0;
		//mucTime100ms++;
		muc100msDelay++;
		mucSweep100msDelay++;
		/*
		if(mucTime100ms>=10)
		{
			mucTime100ms=0;
			//mucTime1s++;
			//muc1sDelay++;
			/*if(mucTime1s>=60)
			{
				mucTime1s=0;
				mucTime60s++;
			}
		}
		*/
	}
}
//晶体为24MHZ
void time1(void) interrupt 3 using 1
{
    	TL1=-(2000%256);//1ms中断一次
    	TH1=-(2000/256);
    	ET1=0;     	//允许定时器1中断
    	sweep_process_and_freq_ad9833_out();
    	ET1=1;     	//允许定时器1中断
}
/*
void DDS9833_set_freq (void)
{
	unsigned char byte_temp;
	unsigned long freq_word =0x0505AAFF ;//频率控制字
	float    fTemp;
	fTemp=mulFreq;
	fTemp=fTemp*65536/DDS_CLK_IN*65536;
	freq_word =fTemp;
	//freq_word =(float)mulFreq*65536/DDS_CLK_IN*65536;

	_nop_(); _nop_(); _nop_(); _nop_();
	DDS_UPDATE = 0;
	_nop_(); _nop_(); _nop_(); _nop_();
	DDS_CLK = 0;
	_nop_(); _nop_(); _nop_(); _nop_();

	for ( byte_temp = 0; byte_temp < 32; byte_temp++ )
	{
		freq_word = freq_word >> 1;
		DDS_DATA = CY;
		DDS_CLK = 1;
		_nop_(); _nop_(); _nop_(); _nop_(); //实际应用应在延迟
		DDS_CLK = 0;
	}
	for ( byte_temp = 0; byte_temp < 8; byte_temp++ )
	{
		DDS_DATA = 0;
		DDS_CLK = 1;
		_nop_(); _nop_(); _nop_(); _nop_();
		DDS_CLK = 0;
	}

	DDS_UPDATE = 1;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DDS_UPDATE = 0;
}
*/


void write_disp_command(uint uiWord)
{
	uchar i;
	//uchar ucTemp;
	DISP_LOAD=0;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	for(i=0;i<12;i++)
	{
		DISP_CLK=0;
		uiWord=uiWord>>1;
		_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
		DISP_DATA=CY;
		_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
		DISP_CLK=1;//上升沿写入数据
		_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	}
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DISP_LOAD=1;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DISP_CLK=0;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DISP_DATA=0;
}

void disp_Led(uchar ucLedNo,uchar ucDispNumberBCD)
{
	uint uiDispCode;
	uiDispCode=ucLedNo+8;
	uiDispCode<<=8;
	uiDispCode+=ucDispNumberBCD;
	write_disp_command(uiDispCode);
}
void init_disp(void)
{
	//使能串行接口
	DISP_DATA=1;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DISP_DATA=0;
	_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();
	DISP_DATA=1;
	//芯片内部复位
	write_disp_command(0x201);
	//只启用显示驱动
	write_disp_command(0x401);
	//设定显示参数:BCD
	write_disp_command(0x58A);
	//下面写数码管对应数据
	//disp_Led(7,8);
	disp_Led(6,8);
	disp_Led(5,8);
	disp_Led(4,8);
	disp_Led(3,8);
	disp_Led(2,8);
	disp_Led(1,8);
	disp_Led(0,8);
}
void flash_led(uchar ucLedNo)
{
	uint uiDispCode;
	uiDispCode=6;
	uiDispCode<<=8;
	if(ucLedNo<8)	uiDispCode+=(1<<ucLedNo);
	write_disp_command(uiDispCode);
}

void value_to_bcd(void)
{
	uchar i;
	ulong ulFreq;
	ulFreq=mulFreq;
	for(i=0;i<MAX_INPUT_NUMBERS;i++)
	{
		mucInputNumber[MAX_INPUT_NUMBERS-1-i]=ulFreq%10;
		ulFreq/=10;
	}
}
void disp_freq(void)
{
	value_to_bcd();
	disp_Led(5,mucInputNumber[5]);
	disp_Led(4,mucInputNumber[4]);
	disp_Led(3,mucInputNumber[3]);
	disp_Led(2,mucInputNumber[2]);
	disp_Led(1,mucInputNumber[1]);
	disp_Led(0,mucInputNumber[0]);
}
void get_freq(void)
{
	uchar i;
	ulong ulFreq;
	ulFreq=0;
	for(i=0;i<MAX_INPUT_NUMBERS;i++)
	{
		ulFreq*=10;
		ulFreq+=mucInputNumber[i];
	}
	mulFreq=ulFreq;
}
void number_add(void)
{
	uchar ucTemp;
	mbFreqUpdateFlag=TRUE;
	mbDispFreqFlag=TRUE;
	ucTemp=mucInputNumber[mucFlashBit];
	if(ucTemp==9)	ucTemp=0;
	else			ucTemp++;
     //if(mucFlashBit==0 &&  ucTemp>2)  ucTemp=0;
	mucInputNumber[mucFlashBit]=ucTemp;
	get_freq();
}
void number_dec(void)
{
	uchar ucTemp;
	mbFreqUpdateFlag=TRUE;
	mbDispFreqFlag=TRUE;
	ucTemp=mucInputNumber[mucFlashBit];
	if(ucTemp==0)
     {
		ucTemp=9;
     	//if(mucFlashBit==0)  ucTemp=2;
     }
	else			ucTemp--;
	mucInputNumber[mucFlashBit]=ucTemp;
	get_freq();
}

void sweep_freq_disp_process(void)
{
	mucSweep100msDelay=0;
	mulFreq=gulSweepCurrentFreqWord&0x3FFFFFFF;
	value_to_bcd();
	disp_freq();
}
void dis_wave_mode(void)
{
	disp_Led(6,mucWaveMode);
}

void wave_mode_process(void)
{
	if(mucWaveMode==SWEEP)
	{
		sweep_start_process();
		gucFunction=FUN_SWEEP;
	}
	else
	{
		gucFunction=FUN_SW;
		sweep_stop_process();
		//sweep_freq_disp_process();
                //value_to_bcd();
                get_freq();
                disp_freq();
		select_waveform(mucWaveMode);
	}
}

void wave_mode_add(void)
{
	mbDispWaveModeFlag=TRUE;
	if(mucWaveMode<3)	mucWaveMode++;
	else              	mucWaveMode=1;
	wave_mode_process();
}
void wave_mode_dec(void)
{
	mbDispWaveModeFlag=TRUE;
	if(mucWaveMode>1)	mucWaveMode--;
	else              	mucWaveMode=3;
	wave_mode_process();
}

uchar key_scan(void)
{
	uchar ucKey;
	//ucKey=KEY_NULL;
	//按键接在P3.2,P3.3,P3.4,P3.5
	//P3=0x34;
	ucKey=P3&KEY_NULL;
	if(gucKeyStatus==KEY_HAS_BE_UP)
	{
		if(ucKey!=KEY_NULL)
		{
			delay_ms(40);
			ucKey=P3&KEY_NULL;
		}
		if(ucKey!=KEY_NULL)	gucKeyStatus=KEY_HAS_BE_DOWN;
	}
	else if(gucKeyStatus==KEY_HAS_BE_PROCESSED)
	{
		if(ucKey==KEY_NULL)
		{
			delay_ms(40);
			ucKey=P3&KEY_NULL;
		}
		if(ucKey==KEY_NULL)	gucKeyStatus=KEY_HAS_BE_UP;
	}
	return ucKey;
}
void key_process(uchar ucKey)
{
	mbDispFreqFlag=FALSE;
	mbFreqUpdateFlag=FALSE;
	mbDispWaveModeFlag=FALSE;
	switch(ucKey)
	{
		case KEY_LEFT:
			//扫描时,只能改变输出信号模式
			if(gucFunction!=FUN_SWEEP)
			{
				if(mucFlashBit==MAX_INPUT_LEDS)	mucFlashBit=0;
				else 						mucFlashBit++;
				flash_led(mucFlashBit);
				//mbDispFreqFlag=TRUE;
			}
			break;
		/*
		case KEY_RIGHT:
			if(mucFlashBit==0)	mucFlashBit=MAX_INPUT_LEDS;
			else 			mucFlashBit--;
			flash_led(mucFlashBit);
			//mbDispFreqFlag=TRUE;
			break;
		*/
		case KEY_UP:
			if(mucFlashBit!=MAX_INPUT_NUMBERS)		number_add();
			else if(mucFlashBit==MAX_INPUT_NUMBERS)	wave_mode_add();
			break;
		case KEY_DOWN:
			if(mucFlashBit!=MAX_INPUT_NUMBERS)		number_dec();
			else if(mucFlashBit==MAX_INPUT_NUMBERS)	wave_mode_dec();
			break;
	}
	if(mbDispFreqFlag==TRUE)	disp_freq();
	else if(mbDispWaveModeFlag==TRUE)	dis_wave_mode();
	if(mbFreqUpdateFlag==TRUE)
	{
		freq_ad9833_out(mulFreq);
	}
}

void main(void)
{
	uchar  ucKey;
	init_device();
	delay_100ms(20);

	reset_ad9833();     //复位AD9833
	sweep_init();

	init_disp();
	delay_100ms(20);

	mucWaveMode=SINE;
	mulFreq=500000;//500KHz
        //mulFreq=5;//500KHz
	value_to_bcd();
	mucFlashBit=0;
	flash_led(mucFlashBit);
	disp_freq();
	dis_wave_mode();
	freq_ad9833_out(mulFreq);

	gucKeyStatus=KEY_HAS_BE_UP;
	while(1)
	{
		ucKey=key_scan();

		if(gucKeyStatus==KEY_HAS_BE_DOWN)
		{
			key_process(ucKey);
			gucKeyStatus=KEY_HAS_BE_PROCESSED;
		}
		if(gucFunction==FUN_SWEEP && mucSweep100msDelay>SWEEP_FREQ_DELAY_100mS)	sweep_freq_disp_process();
	}
}