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mikroSDK Library

LLC I2C click

Rating:

6

Author: MIKROE

Last Updated: 2018-12-18

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Port expander

Downloaded: 4619 times

Not followed.

License: MIT license  

LLC I2C click can be utilized as the level converter for the logic signals, which makes it a very useful Click board. The topology of this logic level conversion (LLC) circuit is perfectly suited for the bi-directional I2C communication.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

LLC I2C click

LLC I2C click

Native view of the LLC I2C click board.

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LLC I2C click

LLC I2C click

Front and back view of the LLC I2C click board.

View full image

Library Description

The library contains functions for starting, writing data to I2C wires and reading data from I2C wires.

Key functions:

  • void i2cllc_start() - The function executes start condition on I2C wires.
  • void i2cllc_write(uint8_t slaveAddress, uint8_t *pBuf, uint16_t nBytes, uint8_t endMode) - The function should execute write sequence on I2C wires.
  • void i2cllc_read(uint8_t slaveAddress, uint8_t *pBuf, uint16_t nBytes, uint8_t endMode) - The function should execute read sequence on I2C wires.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes I2C module
  • Application Initialization - Initialization driver init
  • Application Task - (code snippet) - Reads the temperature from the Thermo 7 click board and logs data to UART.

Note: The start configuration chip is required at the beginning of each program so that the chip wakes up and prepares for operation and measurement. What is included and set in the start-up function can be viewed in the help file.

void applicationTask()
{
    // Thermo 7 measurement Temperature
    uint8_t writeReg[ 1 ];
    uint8_t readReg[ 2 ] = {0};
    
    float Temp_msb;
    uint8_t Temp_lsb;
    char  tempText[ 50 ];

    writeReg[ 0 ] = 0x00;
    i2cllc_start();
    i2cllc_write( 0x48, &writeReg[0], 1, _I2CLLC_END_MODE_RESTART );
    i2cllc_read( 0x48, &readReg[0], 2, _I2CLLC_END_MODE_STOP );
    
    Temp_msb = readReg[ 0 ];
    Temp_lsb = readReg[ 1 ] & 0xF0;

    if( temp_lsb & 0x80 ) Temp_msb += 0.50;
    if( temp_lsb & 0x40 ) Temp_msb += 0.25;
    if( temp_lsb & 0x20 ) Temp_msb += 0.125;
    if( temp_lsb & 0x10 ) Temp_msb += 0.0625;

    FloatToStr(Temp_msb, tempText);
    mikrobus_logWrite(" Ambient temperature : ", _LOG_TEXT );
    mikrobus_logWrite(tempText, _LOG_TEXT);
    mikrobus_logWrite(" C", _LOG_LINE);
    Delay_ms( 1000 );
}

Other mikroE Libraries used in the example:

I2C

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

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