void SendChar(unsigned char data) {
IdleI2C();
StartI2C();
IdleI2C();
putcI2C(OLED_address); //send address
IdleI2C();
putcI2C(0x40); //send data incomming
IdleI2C();
putcI2C(data);
IdleI2C();
// WriteI2C(0x40);
//WriteI2C(data);
StopI2C();
}
void sendcommand(unsigned char com) {
IdleI2C();
StartI2C();
IdleI2C();
putcI2C(OLED_address); //send address
IdleI2C();
putcI2C(0x80); //send data incomming
IdleI2C();
putcI2C(com);
IdleI2C();
//WriteI2C(0x80);
//WriteI2C(com);
StopI2C();
}
signed char putsI2C( unsigned char *wrptr )
{
unsigned char temp;
while ( *wrptr ) // transmit data until null character
{
if ( (SSPCON&0x0F)==0x0B ) // if Master I2C in firmware,then execute the following
{
temp = putcI2C ( *wrptr );
if (temp ) return ( temp ); // return with write collision error
// if ( putcI2C ( *wrptr ) ) // write 1 byte
// {
// return ( -3 ); // return with write collision error
// }
// IdleI2C(); // test for idle condition
// if ( SSPCON2bits.ACKSTAT ) // test received ack bit state
// {
// return ( -2 ); // bus device responded with NOT ACK
// } // terminate putsI2C() function
}
else // else Slave transmitter
{
PIR1bits.SSPIF = 0; // reset SSPIF bit
SSPBUF = *wrptr; // load SSPBUF with new data
SSPCONbits.CKP = 1; // release clock line
while ( !PIR1bits.SSPIF ); // wait until ninth clock pulse received
if ( ( SSPCONbits.CKP ) && ( !SSPSTATbits.BF ) )// if R/W=0 and BF=0, NOT ACK was received
{
return ( -2 ); // terminate PutsI2C() function
}
}
wrptr ++; // increment pointer
} // continue data writes until null character
return ( 0 );
}
