IIC.rar_PIC i2c_pic iic

#include <p18f66j15.h> #include <i2c.h> #include "AN991.h" /************************************************************************ * Function Name: LDByteWriteI2C * * Parameters: EE memory ControlByte, address and data * * Description: Writes data one byte at a time to I2C EE * * device. This routine can be used for any I2C * * EE memory device, which only uses 1 byte of * * address data as in the 24LC01B/02B/04B/08B/16B. * * * ************************************************************************/ /* unsigned char LDByteWriteI2C( unsigned char ControlByte, unsigned char LowAdd, unsigned char data ) { IdleI2C(); // ensure module is idle StartI2C(); // initiate START condition while ( SSPCON2bits.SEN ); // wait until start condition is over WriteI2C( ControlByte ); // write 1 byte - R/W bit should be 0 IdleI2C(); // ensure module is idle WriteI2C( LowAdd ); // write address byte to EEPROM IdleI2C(); // ensure module is idle WriteI2C ( data ); // Write data byte to EEPROM IdleI2C(); // ensure module is idle StopI2C(); // send STOP condition while ( SSPCON2bits.PEN ); // wait until stop condition is over while (EEAckPolling(ControlByte)); //Wait for write cycle to complete return ( 0 ); // return with no error } */ /******************************************************************** * Function Name: LDByteReadI2C * * Parameters: EE memory ControlByte, address, pointer and * * length bytes. * * Description: Reads data string from I2C EE memory * * device. This routine can be used for any I2C* * EE memory device, which only uses 1 byte of * * address data as in the 24LC01B/02B/04B/08B. * * * ********************************************************************/ /* unsigned char LDByteReadI2C( unsigned char ControlByte, unsigned char address, unsigned char *data, unsigned char length ) { IdleI2C(); // ensure module is idle StartI2C(); // initiate START condition while ( SSPCON2bits.SEN ); // wait until start condition is over WriteI2C( ControlByte ); // write 1 byte IdleI2C(); // ensure module is idle WriteI2C( address ); // WRITE word address to EEPROM IdleI2C(); // ensure module is idle RestartI2C(); // generate I2C bus restart condition while ( SSPCON2bits.RSEN ); // wait until re-start condition is over WriteI2C( ControlByte | 0x01 ); // WRITE 1 byte - R/W bit should be 1 for read IdleI2C(); // ensure module is idle getsI2C( data, length ); // read in multiple bytes NotAckI2C(); // send not ACK condition while ( SSPCON2bits.ACKEN ); // wait until ACK sequence is over StopI2C(); // send STOP condition while ( SSPCON2bits.PEN ); // wait until stop condition is over return ( 0 ); // return with no error } */ /******************************************************************** * Function Name: LDPageWriteI2C * * Parameters: EE memory ControlByte, address and pointer * * Description: Writes data string to I2C EE memory * * device. This routine can be used for any I2C* * EE memory device, which uses 2 bytes of * * address data as in the 24LC32A/64/128/256. * * * ********************************************************************/ /* unsigned char LDPageWriteI2C( unsigned char ControlByte, unsigned char LowAdd, unsigned char *wrptr ) { IdleI2C(); // ensure module is idle StartI2C(); // initiate START condition while ( SSPCON2bits.SEN ); // wait until start condition is over WriteI2C( ControlByte ); // write 1 byte - R/W bit should be 0 IdleI2C(); // ensure module is idle WriteI2C( LowAdd ); // write LowAdd byte to EEPROM IdleI2C(); // ensure module is idle putstringI2C ( wrptr ); // pointer to data for page write IdleI2C(); // ensure module is idle StopI2C(); // send STOP condition while ( SSPCON2bits.PEN ); // wait until stop condition is over return ( 0 ); // return with no error } */ /******************************************************************** * Function Name: LDSequentialReadI2C * * Parameters: EE memory ControlByte, address, pointer and * * length bytes. * * Description: Reads data string from I2C EE memory * * device. This routine can be used for any I2C* * EE memory device, which only uses 1 byte of * * address data as in the 24LC01B/02B/04B/08B. * * * ********************************************************************/ /* unsigned char LDSequentialReadI2C( unsigned char ControlByte, unsigned char address, unsigned char *rdptr, unsigned char length ) { IdleI2C(); // ensure module is idle StartI2C(); // initiate START condition while ( SSPCON2bits.SEN ); // wait until start condition is over WriteI2C( ControlByte ); // write 1 byte IdleI2C(); // ensure module is idle WriteI2C( address ); // WRITE word address to EEPROM IdleI2C(); // ensure module is idle RestartI2C(); // generate I2C bus restart condition while ( SSPCON2bits.RSEN ); // wait until re-start condition is over WriteI2C( ControlByte | 0x01 ); // WRITE 1 byte - R/W bit should be 1 for read IdleI2C(); // ensure module is idle getsI2C( rdptr, length ); // read in multiple bytes NotAckI2C(); // send not ACK condition while ( SSPCON2bits.ACKEN ); // wait until ACK sequence is over StopI2C(); // send STOP condition while ( SSPCON2bits.PEN ); // wait until stop condition is over return ( 0 ); // return with no error } */ /************************************************************************ * Function Name: HDByteWriteI2C * * Parameters: EE memory ControlByte, address and data * * Description: Writes data one byte at a time to I2C EE * * device. This routine can be used for any I2C * * EE memory device, which only uses 1 byte of * * address data as in the 24LC01B/02B/04B/08B/16B. * * * ************************************************************************/ /* unsigned char HDByteWriteI2C( unsigned char ControlByte, unsigned char HighAdd, unsigned char LowAdd, un