Mikroelektronika MIKROE-742 데이터 시트

The mikroPascal PRO for AVR provides routines for implementing Software I

2

C

communication. These routines are hardware independent and can be used with

any MCU. The Software I

2

C library enables you to use MCU as Master in I2C com-

munication. Multi-master mode is not supported.

Note: This library implements time-based activities, so interrupts need to be dis-
abled when using Software I

2

C.

Note: All Software I

2

C Library functions are blocking-call functions (they are waiting

for I

2

C clock line to become logical one).

Note: The pins used for Software I

2

C communication should be connected to the pull-up

resistors. Turning off the LEDs connected to these pins may also be required.

351

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

var Soft_I2C_Scl_Output :
sbit; sfr; external;

Soft I

2

C  Clock out-

put line.

var
Soft_I2C_Scl_Output :
sbit at PORTC.B0;

var Soft_I2C_Sda_Output :
sbit; sfr; external;

Soft I

2

C Data out-

put line.

var
Soft_I2C_Sda_Output :
sbit at PORTC.B1;

var Soft_I2C_Scl_Input :
sbit; sfr; external;

Soft I

2

C Clock input

line.

var Soft_I2C_Scl_Input
: 

sbit at PINC.B0;

var Soft_I2C_Sda_Input :
sbit; sfr; external;

Soft I

2

C Data input

line.

var Soft_I2C_Sda_Input
: 

sbit at PINC.B1;

var
Soft_I2C_Scl_Pin_Direction

: 

Direction of the Soft
I

2

C Clock pin.

var
Soft_I2C_Scl_Pin_Direct

ion : 

sbit at DDRC.B0;

var
Soft_I2C_Sda_Pin_Direction
: 

Direction of the Soft
I

2

C Data pin.

var
Soft_I2C_Sda_Pin_Direct
ion : 

sbit at DDRC.B1;