Mikroelektronika MIKROE-724 Scheda Tecnica

450

mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

The  mikroBasic  PRO  for  dsPIC30/33  and  PIC24  provides  routines  for  implementing  Software  I²C  communication. 

These routines are hardware independent and can be used with any MCU. The Software I²C library enables you to use 

MCU as Master in I²C communication. Multi-master mode is not supported.

Important: 

- This library implements time-based activities, so interrupts need to be disabled when using Software I²C. 

- All Software I²C Library functions are blocking-call functions (they are waiting for I²C clock line to become logical  

  one). 

- The pins used for the Software I²C communication should be connected to the pull-up resistors. Turning off the  

  LEDs connected to these pins may also be required. 

- Every Software I²C library routine has its own counterpart in Hardware I²C library, except 

I2C_Repeated_Start.  

 Soft_I2C_Start

 is used instead of 

I2C_Repeated_Start

.

- Working clock frequency of the Software I²C is 20kHz.

dim Soft_I2C_Scl as sbit sfr external

Soft I²C Clock line.

dim Soft_I2C_Scl as sbit at RF3_bit

dim Soft_I2C_Sda as sbit sfr external

Soft I²C Data line.

dim Soft_I2C_Sda as sbit at RF2_bit

dim  Soft_I2C_Scl_Direction  as  sbit 

Direction  of  the  Soft  I²C 

Clock pin.

dim  Soft_I2C_Scl_Direction  as  sbit 

at TRISF3_bit

dim  Soft_I2C_Sda_Direction  as  sbit 

Direction  of  the  Soft  I²C 

Data pin.

dim  Soft_I2C_Sda_Direction  as  sbit 

at TRISF2_bit

External dependencies of Software I²C Library

Library Routines

 

- Soft_I2C_Init 

 

- Soft_I2C_Start 

 

- Soft_I2C_Read 

 

- Soft_I2C_Write 

 

- Soft_I2C_Stop 

 

- Soft_I2C_Break