SI5338A_I2C_配置程序.doc

#include #include #include #include ADDR.H#include SI5338.H /clockbuilder产生寄存器值头文件#define uchar unsigned char#define uint unsigned int#define TRUE1#define FALSE 0sbit SCL=P26;sbit SDA=P21;bit I2CErr = FALSE;bit LOCK_PLL = TRUE;/*-函数名称：延时-*/void DELAY(void) _nop_(); _nop_(); _nop_(); _nop_();/*-函数名称：10us延时-*/void DELAY_10(uchar n) do _nop_(); _nop_(); _nop_(); _nop_(); _nop_();while(-n);/*-函数名称：启动-*/void I2C_Start(void) SDA=1;SCL=1; DELAY();SDA=0; DELAY();SCL=0;/*-函数名称：停止-*/void I2C_Stop(void) SCL=0; SDA=0; DELAY(); SCL=1; DELAY();SDA=1;/*-函数名称：测试应答-*/bit I2C_WaitAck(void) uchar times=255;/避免故障，设定错误次数SDA=1; _nop_();SCL=1;while(SDA)times-;if(!times)/超时值为255 I2C_Stop();I2CErr=TRUE;return FALSE; DELAY();SCL=0; I2CErr=FALSE;return TRUE;/*-函数名称：发送应答-*/void I2C_SendAck(void) SDA=0;DELAY();SCL=1;DELAY();SCL=0;/*-函数名称：发送非应答-*/void I2C_SendNoAck(void) SDA=1;DELAY();SCL=1;DELAY();SCL=0;/*-函数名称：发送1字节数据-*/void I2C_SendByte(uchar dat)uchar i; for(i=0;i=7;i+) _nop_();if(dat&0x80)=0x80)SDA=1;elseSDA=0;dat=1;SCL=1;DELAY();SCL=0;/*-函数名称：接收1字节数据-*/void I2C_RcvByte(uchar *pRdDat)uchar i; SDA=1; for(i=0;i=7;i+)SCL=1;DELAY();*pRdDat=1;*pRdDat|=SDA;SCL=0;DELAY();/*-函数名称：写N字节数据-*/void I2C_WrBytes(uchar wrDAdr1,uchar wordAdr1,uchar *pWrDat,uchar num1) uchar i;I2C_Start();I2C_SendByte(wrDAdr1); I2C_WaitAck();I2C_SendByte(wordAdr1); I2C_WaitAck();for(i=0;inum1;i+)I2C_SendByte(*(pWrDat+i); I2C_WaitAck(); I2C_Stop();/*-函数名称：读N字节数据-*/void I2C_RcvBytes(uchar wrDAdr2,uchar wordAdr2,uchar rdDAdr2,uchar *pRdDat,uchar num2) uchar i;I2C_Start();I2C_SendByte(wrDAdr2); I2C_WaitAck();I2C_SendByte(wordAdr2); I2C_WaitAck(); I2C_Stop();I2C_Start();I2C_SendByte(rdDAdr2); I2C_WaitAck();for(i=0;inum2-1;i+)I2C_RcvByte(pRdDat+i); I2C_SendAck(); I2C_RcvByte(pRdDat+i); I2C_SendNoAck();I2C_Stop();/*-函数名称：SI5338A写入register map-*/void si5338_wrregmap(uchar addr,uchar reg,uint Reg_Num) uchar curr_val1; uchar clear_curr_val,clear_new_val,combined; / ignore registers with masks of 0x00 if(Reg_StoreReg_Num.Reg_Mask != 0x00) if(Reg_StoreReg_Num.Reg_Mask = 0xFF) / do a regular I2C write to the register / at addr with the desired data value I2C_Start(); /*Disable Outputs,set reg2304=1*/ I2C_SendByte(addr|0); I2C_WaitAck(); I2C_SendByte(reg); I2C_WaitAck(); I2C_SendByte(Reg_StoreReg_Num.Reg_Val); I2C_WaitAck(); I2C_Stop(); else / do a read-modify-write using I2C and / bit-wise operations / get the current value from the device at the / register located at addr I2C_RcvBytes(addr|0,reg,addr|1,curr_val,1); / clear the bits that are allowed to be / accessed in the current value of the register clear_curr_val = curr_val0 & ( Reg_Storereg.Reg_Mask); / clear the bits in the desired data that / are not allowed to be accessed clear_new_val = Reg_StoreReg_Num.Reg_Val & Reg_Storereg.Reg_Mask; / combine the cleared values to get the new / value to write to the desired register combined = clear_curr_val | clear_new_val; I2C_Start(); /*Disable Outputs,set reg2304=1*/ I2C_SendByte(addr|0); I2C_WaitAck(); I2C_SendByte(reg); I2C_WaitAck(); I2C_SendByte(combined); I2C_WaitAck(); I2C_Stop(); /*-函数名称：SI5338A写单寄存器-*/void si5338_wrmask(uchar addr,uchar reg,uchar mask,uchar dat) uchar curr_val1; uchar clear_curr_val; uchar clear_new_val; uchar combined; / ignore registers with masks of 0x00 if(mask != 0x00) if(mask = 0xFF) / do a regular I2C write to the register / at addr with the desired data value I2C_Start(); /*Disable Outputs,set reg2304=1*/ I2C_SendByte(addr|0); I2C_WaitAck(); I2C_SendByte(reg); I2C_WaitAck(); I2C_SendByte(dat); I2C_WaitAck(); I2C_Stop(); else / do a read-modify-write using I2C and / bit-wise operations / get the current value from the device at the / register located at addr I2C_RcvBytes(addr|0,reg,addr|1,curr_val,1); / clear the bits that are allowed to be / accessed in the current value of the register clear_curr_val = curr_val0 & ( mask); / clear the bits in the desired data that / are not allowed to be accessed clear_new_val = dat & mask; / combine the cleared values to get the new / value to write to the desired register combined = clear_curr_val | clear_new_val; I2C_Start(); /*Disable Outputs,set reg2304=1*/ I2C_SendByte(addr|0); I2C_WaitAck(); I2C_SendByte(reg); I2C_WaitAck(); I2C_SendByte(combined); I2C_WaitAck(); I2C_Stop(); /*-函数名称：配置第一片SI5338A-*/void si5338_config1() uint i; uchar reg11,reg21,reg31; uchar time1=255; _nop_(); /*Disable Outputs,set reg2304=1*/ I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0xE6); I2C_WaitAck(); I2C_SendByte(0x1F); I2C_WaitAck(); I2C_Stop(); _nop_(); /*Pause LOL,set reg2417=1*/ I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0xF1); I2C_WaitAck(); I2C_SendByte(0x85); I2C_WaitAck(); I2C_Stop();for(i=0;i349;i+) /*配置Register Map*/ si5338_wrregmap(si5338_addr1|0,Reg_Storei.Reg_Addr,i); _nop_(); /*Configure PLL for locking,set reg497=0*/ I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0x31); I2C_WaitAck(); I2C_SendByte(0x10); I2C_WaitAck(); I2C_Stop(); _nop_(); /*Initiate Locking of PLL,set reg2461=1*/ I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0xF6); I2C_WaitAck(); I2C_SendByte(0x02); I2C_WaitAck(); I2C_Stop(); _nop_(); /*Restart LOL,set reg2417=0*/ I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0xF1); I2C_WaitAck(); I2C_SendByte(0x05); I2C_WaitAck(); I2C_Stop(); DELAY_10(2500);/*wait 25ms*/ I2C_Start(); /is PLL lockedI2C_SendByte(si5338_addr1|0); I2C_WaitAck();I2C_SendByte(0xDA); I2C_WaitAck(); I2C_Stop();I2C_Start();I2C_SendByte(si5338_addr1|1); I2C_WaitAck(); I2C_RcvByte(reg1); I2C_SendNoAck();I2C_Stop(); if(reg10&0x11) != 0x00) time1-;if(!time1)/超时值为255LOCK_PLL=FALSE; DELAY(); else LOCK_PLL=TRUE; _nop_(); /*copy 2371:0 to 471:0*/ I2C_RcvBytes(si5338_addr1|0,0xED,si5338_addr1|1,reg1,1); I2C_RcvBytes(si5338_addr1|0,0x2F,si5338_addr1|1,reg2,1); reg30=(reg10&0x03)|(reg20&0xFC); I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0x2F); I2C_WaitAck(); I2C_SendByte(reg30); I2C_WaitAck(); I2C_Stop(); _nop_(); /*copy 2367:0 to 467:0*/ I2C_RcvBytes(si5338_addr1|0,0xEC,si5338_addr1|1,reg1,1); I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0x2E); I2C_WaitAck(); I2C_SendByte(reg10); I2C_WaitAck(); I2C_Stop(); _nop_(); /*copy 2357:0 to 457:0*/ I2C_RcvBytes(si5338_addr1|0,0xEB,si5338_addr1|1,reg1,1); I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0x2D); I2C_WaitAck(); I2C_SendByte(reg10); I2C_WaitAck(); I2C_Stop(); _nop_(); /*set 477:2 = 000101b*/ I2C_RcvBytes(si5338_addr1|0,0x2F,si5338_addr1|1,reg1,1); reg20=(reg10&0x03)|0x14; I2C_Start(); I2C_SendByte(si5338_addr1|0); I2C_WaitAck(); I2C_SendByte(0x2F); I2C_WaitAck(); I2C_SendByte(reg20); I2C_WaitAck(); I2C_Stop(); _nop_();