Silicon Laboratories Stepper Machine User Manual download pdf (Page 22)

AN428

22 Rev. 0.6

// I2C_ByteWrite()

// functions have claimed the SMBus

bit SMB_RW; // Software flag to indicate the

// direction of the current transfer

bit SMB_SENDWORDADDR; // When set, this flag causes the ISR

// to send the 8-bit <WORD_ADDR>

// after sending the slave address.

bit SMB_RANDOMREAD; // When set, this flag causes the ISR

// to send a START signal after sending

// the word address.

// The ISR handles this

// switchover if the <SMB_RANDOMREAD>

// bit is set.

bit SMB_ACKPOLL; // When set, this flag causes the ISR

// to send a repeated START until the

// slave has acknowledged its address

SBIT(SDA, SFR_P0, 0); // SMBus on P0.0

SBIT(SCL, SFR_P0, 1); // and P0.1

SBIT (P0_5, SFR_P0, 5);

SBIT (P0_6, SFR_P0, 6);

//-----------------------------------------------------------------------------

// Function PROTOTYPES

//-----------------------------------------------------------------------------

void SMBus_Init (void);

void Timer1_Init (void);

void Timer2_Init (void);

void Port_Init (void);

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Silicon Laboratories Stepper Machine User Manual Page 22