Mikroc - I2C - Master and Slave

/* *Projectname: Master *Description: MastercontrolforPIC2PICI2CCommunication *Configuration: MCU:PIC16F876A SW:mikroCv6.0 *NOTES: */ //--------------------------------------------------------------------//------------------------------------------------------------------------------------constSlave_Addy=0x69; voidsend(unsignedshortsend_data){ I2C_Init(100000); I2C_Start(); I2C_Wr(Slave_Addy); I2C_Wr(send_data); I2C_Stop(); } unsignedshortread(){ unsignedshortread_data; I2C_Init(100000); I2C_Start(); I2C_Wr(Slave_Addy+1); read_data=I2C_Rd(0); delay_ms(100); I2C_Stop(); returnread_data; } voidmain(){ //Mainprogramcodeplacehere. //Usesub-routine"send"tosenddatatoslave. //Use"read"toreaddatafromslave. } /* *Projectname: Slave *Description: SlavecodeforPIC2PICI2CCommunication WritedatafromMastertoPORTB SendPORTCdatatoMaster *Configuration: MCU:PIC16F876A SW:mikroCv6.0 *NOTES: */ //--------------------------------------------------------------------//------------------------------------------------------------------------------------constAddy=0x69;//setI constAddy=0x69; //setI2Cdeviceaddress 2Cdeviceaddress constDelay_Time=250;//portcheckdelay //-------------------------------------------//------------------------------------------------------------------------------------------------------------//GlobalProcessingVariables //-------------------------------------------//------------------------------------------------------------------------------------------------------------unsignedshortj;//just unsignedshortj; //justdummyforbufferread dummyforbufferread unsignedshortrxbuffer;//

unsignedshorttx_data;// //-----------------------------------------------------------------------------voidInit(){ ADCON1=0;//Allportssettodigital TRISA=0;//SetPORTAasoutput TRISB=0;//SetPORTBasoutput TRISC=0xFF;//SetPORTCasinput SSPADD=Addy;//Getaddress(7bit).Lsbisread/write flag SSPCON=0x36;//SettoI2Cslavewith7-bitaddress PIE1.SSPIF=1;//enableSSPinterrupts INTCON=0xC0;//enableINTCON.GIE } //-----------------------------------------------------------------------------voidinterrupt(){//I2Cslaveinterrupthandler if(PIR1.SSPIF==1){//I2CInterrupt PIR1.SSPIF=0;//resetSSPinterruptflag //transmitdatatomaster if(SSPSTAT.R_W==1){//Readrequestfrommaster SSPBUF=tx_data;//Getdatatosend SSPCON.CKP=1;//ReleaseSCLline j=SSPBUF;//That'sit return; } if(SSPSTAT.BF==0){//alldone, j=SSPBUF;//Nothinginbuffersoexit return; } //recievedatafrommaster if(SSPSTAT.D_A==1){//Data[notaddress] rxbuffer=SSPBUF;//getdata j=SSPBUF;//readbuffertoclearflag[address] return; } } j=SSPBUF;//readbuffertoclearflag[address ] } //-----------------------------------------------------------------------------voidmain(){ Init(); while(1){ PORTB=rxbuffer; tx_data=PORTC; Delay_ms(Delay_Time); } }