2020年SI5338A I2C 配置程序.doc

2020年SI5338A_I2C_配置程序#include<>#include<>#include<>#include""#include""//clockbuilder产生寄存器值头文件#defineucharunsignedchar#defineuintunsignedint#RUE 1#defineFALSE0sbitSCL=P2^6;sbitSDA=P2^1;bitI2CErr=FALSE;bitLOCK_PLL=TRUE;/*--------------------------------------------------------------------函数名称:延时--------------------------------------------------------------------*/voidDELAY(void){_nop_();_nop_();_nop_();_nop_();}/*--------------------------------------------------------------------函数名称:10us延时--------------------------------------------------------------------*/voidDELAY_10(ucharn){do { _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); } while(--n);}/*--------------------------------------------------------------------函数名称:启动--------------------------------------------------------------------*/voidI2C_Start(void){SDA=1; SCL=1;DELAY(); SDA=0;DELAY(); SCL=0;}/*--------------------------------------------------------------------函数名称:停止--------------------------------------------------------------------*/voidI2C_Stop(void){ SCL=0;SDA=0;DELAY();SCL=1;DELAY(); SDA=1;}/*--------------------------------------------------------------------函数名称:测试应答--------------------------------------------------------------------*/bitI2C_WaitAck(void){uchartimes=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; returnFALSE; } }DELAY(); SCL=0;I2CErr=FALSE; returnTRUE;}/*--------------------------------------------------------------------函数名称:发送应答--------------------------------------------------------------------*/voidI2C_SendAck(void){ SDA=0; DELAY(); SCL=1; DELAY(); SCL=0;}/*--------------------------------------------------------------------函数名称:发送非应答--------------------------------------------------------------------*/voidI2C_SendNoAck(void){ SDA=1; DELAY(); SCL=1; DELAY(); SCL=0;}/*--------------------------------------------------------------------函数名称:发送1字节数据--------------------------------------------------------------------*/voidI2C_SendByte(uchardat