📄 spi.c

📁 实现cc2500发送
💻 C
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#include <spi.h>

 	uchar jindu = 1;
	
/*延迟程序12M 大约5uS*/
void delay5us()
{
	uint i;
	for (i=0;i<5;i++)
		_nop_();	
}

//从SI发数据
void SPISendByte(uchar ch)
{
	uchar idata n=8;
	SCLK=0;
	CSn=0;
    delay5us();
	while(n--)
	{
        delay5us();
		SCLK=0;
		if((ch&0x80)==0x80)
			{
			SI=1;
	     	}
		else
			{
			SI=0;
			}
		delay5us();
		ch=ch<<1;
		SCLK=1;
	}
delay5us();
SCLK=0;
}

//SO上接收数据
uchar SPIreceiveByte()
{
	uchar idata n=8;
	uchar tdata;
	SCLK=0;
	CSn=0;
	while (n--)
	{
        delay5us();
		SCLK=0;
        delay5us();
		tdata=tdata<<1;
		if(SO==1)
		    tdata=tdata|0x01;
		else
	    	tdata=tdata&0xfe;
		SCLK=1;
	}
delay5us();
SCLK=0;
return(tdata);
}

uchar spisend_receivebyte(uchar ch)   //发送数据 ，返回状态 
{
    uchar idata n = 8;
	uchar tdata;
	SCLK = 0;
	CSn = 0;
    delay5us();
	while (n--)
	{
	    delay5us();
		SCLK = 0;
		delay5us();

		tdata = tdata << 1;
		if (SO == 1)
		{
		    tdata = tdata | 0x01;
		}
		else
		{
		    tdata = tdata & 0xfe;
		}

		if((ch & 0x80) == 0x80)
		{
		    SI = 1;
		}
		else
		{
		    SI = 0;
		}
		ch = ch << 1;
	    SCLK = 1;
	}
	    delay5us();
		SCLK = 0;
	return(tdata);
}

/*void autoreset(void)        //上电自动复位
{
    SCLK=1;
	SI=0;
    CSn = 1;
	CSn = 0;
	while (SO)
	{
	}
	delay5us();
	delay5us();
	CSn = 1;                             
 	SCLK = 0;
	SI=1;
}*/

void power_on(void)
{
	int i;
    CSn = 1;
	SCLK = 1;
	SI = 0;
	CSn = 0;
	delay5us();
	CSn = 1;
	for (i = 0; i <100; i++)         //持续>40us
    {
	    delay5us();
	}
	CSn = 0;
	while (SO)                               //将CSn拉低，等待SO变低（CHIP_RDYn）
	{}
	SPISendByte(0x30);
	while (SO)                               //当SO再次为低时，时钟与电压都稳定了
	{}
	CSn=1;
    SCLK=0;
	SI=1;
	SO=1;
}

void LEDSHOW(uchar ch)
{
    uchar i=100;uint j;
    while (i--)
	{
		P1 = 0xef;
	    switch(ch&0x0f)
		{
		    case 0x00:	P0 = 0xc0;	break;
			case 0x01:  P0 = 0xf9;	break;
		    case 0x02:  P0 = 0xa4;  break;
		    case 0x03:  P0 = 0xb0; 	break;
		    case 0x04:  P0 = 0x99; 	break;
		    case 0x05:  P0 = 0x92; 	break;
		    case 0x06:  P0 = 0x82; 	break;
		    case 0x07:  P0 = 0xf8; 	break;
		    case 0x08:  P0 = 0x80; 	break;
		    case 0x09:  P0 = 0x90; 	break;
		    case 0x0a:  P0 = 0x88; 	break;
		    case 0x0b:  P0 = 0x83; 	break;
		    case 0x0c:  P0 = 0xc6; 	break;
		    case 0x0d:  P0 = 0xa1; 	break;
		    case 0x0e:  P0 = 0x86; 	break;
		    case 0x0f:  P0 = 0x8e; 	break;

	    }
	    for(j=0;j<100;j++)	   {   delay5us();  delay5us();     }
	    P1 = 0xdf;
	    switch((ch>>4)&0x0f)
		{
		    case 0x00:  P0 = 0xc0; 	break;
			case 0x01:  P0 = 0xf9;	break;
		    case 0x02:  P0 = 0xa4;  break;
		    case 0x03:  P0 = 0xb0; 	break;
		    case 0x04:  P0 = 0x99;  break;
		    case 0x05:  P0 = 0x92; 	break;
		    case 0x06:  P0 = 0x82; 	break;
		    case 0x07:  P0 = 0xf8; 	break;
		    case 0x08:  P0 = 0x80; 	break;
		    case 0x09:  P0 = 0x90; 	break;
		    case 0x0a:  P0 = 0x88; 	break;
		    case 0x0b:  P0 = 0x83; 	break;
		    case 0x0c:  P0 = 0xc6; 	break;
		    case 0x0d:  P0 = 0xa1; 	break;
		    case 0x0e:  P0 = 0x86; 	break;
		    case 0x0f:  P0 = 0x8e; 	break;
	    }
	    for(j=0;j<100;j++)  {    delay5us();     }
    }
	    for(j=0;j<10000;j++)   {	   P1=0xff;	   delay5us();      }
}

void init(void)            //初始化 2500
{
CSn=1;
SPISendByte(0x40);
SPISendByte(0x29);  //00,IOCFG2
SPISendByte(0x2e);  //01,IOCFG1
SPISendByte(0x06);  //02,IOCFG0
SPISendByte(0x07);  //03,FIFOTHR
SPISendByte(0xd3);  //04,SYNC1
SPISendByte(0x91);  //05 ,SYNC0
SPISendByte(0x20);  //06,PKLEN           ////
SPISendByte(0x0C);  //07,PKTCTRL1///////////autoflush
SPISendByte(0x05);  //08,PKTCRL0       //fixed length-04
SPISendByte(0x00);  //09,ADDR
SPISendByte(0x00);  //0a,CHANNR
SPISendByte(0x09);  //0b,FSCTRL1
SPISendByte(0x00);  //0c,FSCTRL0
SPISendByte(0x5d);  //0d,FREQ2
SPISendByte(0x93);  //0e,FREQ1
SPISendByte(0xb1);  //0f,FREQ0
SPISendByte(0x2d);  //10,MDMCFG4
SPISendByte(0x3b);  //11,MDMCFG3
SPISendByte(0x73);  //12,MDMCFG2
SPISendByte(0x22);  //13,MDMCFG1
SPISendByte(0xf8);  //14,MDMCFG0
SPISendByte(0x01);  //15,DEVIATN
SPISendByte(0x07);  //16,MCSM2
SPISendByte(0x30);  //17,MCSM1
SPISendByte(0x18);  //18,MCSM0
SPISendByte(0x1d);  //19,FOCCFG
SPISendByte(0x1c);  //1a,BSCFG
SPISendByte(0xc7);  //1b,AGCCTRL2
SPISendByte(0x00);  //1c,AGCCTRL1
SPISendByte(0xb2);  //1d,AGCCTRL0
SPISendByte(0x87);  //1e,WOREVT1
SPISendByte(0x6b);  //1f,WOREVT0
SPISendByte(0xf8);  //20,WORCTRL
SPISendByte(0xb6);  //21,FREND1
SPISendByte(0x10);  //22,FREND0
SPISendByte(0xea);  //23,FSCAL3
SPISendByte(0x0a);  //24,FSCAL2
SPISendByte(0x00);  //25,FSCAL1
SPISendByte(0x11);  //26,FSCAL0
SPISendByte(0x41);  //27,RCCTRL1
SPISendByte(0x00);  //28,RCCTRL0
SPISendByte(0x59);  //29,FSTEST
SPISendByte(0x7f);  //2a,PTEST
SPISendByte(0x3f);  //2b,AGCTST
SPISendByte(0x88);  //2c,TEST2
SPISendByte(0x31);  //2d,TEST1
SPISendByte(0x0d);  //2e,TEST0
CSn=1;
}
void service_int0()interrupt 0 using 2     //中断源0
                                           
{

jindu=0;
}
//接受数据 调试中
void main(void)
{
    uchar rec[30]={0,0,0,0,0,0,0,0,0,0};
	uchar ere;
	
    power_on();
    init();	
	 A6 = 0;
while(1)
	{    CSn=0;

	ere = spisend_receivebyte(0x34);
	LEDSHOW(ere);
//	spisend_receivebyte(0x38);
	while(1) 
	{if(A3 == 0) A2 = 0;
	else	
	A1 = 0;
	 }
		CSn=1;
	    ere = spisend_receivebyte(0xcf);      //burst,rXFIFO  
		LEDSHOW(ere);
	    ere =  SPIreceiveByte();
		
		CSn = 0;
	}
//	LEDSHOW(rec[2]);		
//	rec[0] = SPIreceiveByte();
//	rec[1] = SPIreceiveByte();
//	rec[2] = SPIreceiveByte();
//	rec[3] = SPIreceiveByte();
//	rec[4] = SPIreceiveByte();
//	rec[5] = SPIreceiveByte();
//	rec[6] = SPIreceiveByte();
//	rec[7] = SPIreceiveByte();
	   
	//spisend_receivebyte(0x35);       //STX  
//	 LEDSHOW(ere);
//	 LEDSHOW(rec[0]);
//	 LEDSHOW(rec[1]);
//	 LEDSHOW(rec[2]);
//	 LEDSHOW(rec[3]);
//	 LEDSHOW(rec[4]);
while(1);

}  
/*	delay5us();
	LEDSHOW(0X00);
	LEDSHOW(0X00);
	LEDSHOW(0X00);
	LEDSHOW(0X00);
	LEDSHOW(0X00);LEDSHOW(0X00);  	
			    CSn=0;	 	A1=0  	;
	//	    spisend_receivebyte(0x35);
	//		delay5us();
		    spisend_receivebyte(0x3f);   //single,TXFIFO
            //b=SPIreceiveByte();
			spisend_receivebyte(0x05);
			CSn=1;
			CSn=0;
			spisend_receivebyte(rec[0]);      //burst,TXFIFO
			spisend_receivebyte(rec[1]);
			spisend_receivebyte(rec[2]);
		    spisend_receivebyte(rec[3]);
			spisend_receivebyte(rec[4]);
		    //spisend_receivebyte(rec[5]);
		    CSn=1;
	spisend_receivebyte(0x35);       //STX
    //      LEDSHOW(b);
	//		for(i=0;i<255;i++)
	//		{
	//		delay5us();
	//		}
//LEDSHOW(b);	*/
//发送数据已通过void SPISendByte(uchar ch)uchar SPIreceiveByte()spisend_receivebyte
/*void main(void)
{	uchar ere;
    power_on();
    init();
	A1=0;
//	spisend_receivebyte(0x3b);     //SFTX
	//		unsigned char i;
		    CSn=0;
	//	    spisend_receivebyte(0x35);
	//		delay5us();
		    spisend_receivebyte(0x3f);   //single,TXFIFO
            //b=SPIreceiveByte();
			spisend_receivebyte(0x05);
			CSn=1;
			CSn=0;
			spisend_receivebyte(0x7f);      //burst,TXFIFO
			spisend_receivebyte(0x13);
			spisend_receivebyte(0x14);
		    spisend_receivebyte(0x15);
			spisend_receivebyte(0x14);
		    spisend_receivebyte(0x15);
		    CSn=1;
	ere =spisend_receivebyte(0x35);       //STX
	
	delay5us();
	LEDSHOW(ere);
    //      LEDSHOW(b);
	//		for(i=0;i<255;i++)
	//		{
	//		delay5us();
	//		}
//LEDSHOW(b);
while(1);

}*/
💿 文件大小 23 K
👤 上传用户 wangcong200500
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#2500 #cc #发送
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