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mikroSDK Library

LLC SPI click

Rating:

6

Author: MIKROE

Last Updated: 2019-01-03

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Port expander

Downloaded: 4433 times

Not followed.

License: MIT license  

The LLC SPI click is a very useful Click board which can be utilized as the level converter for logic signals. The topology of this logic level conversion (LLC) circuit is perfectly suited for SPI communication between devices with unmatched voltages of their logic signals.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

LLC SPI click

LLC SPI click

Native view of the LLC SPI click board.

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LLC SPI click

LLC SPI click

Front and back view of the LLC SPI click board.

View full image

Library Description

The library contains functions for writing data to SPI wires and reading data from SPI wires.

Key functions:

  • void spillc_setCS(uint8_t state) - Function for set CS pin state.
  • void spillc_write(uint8_t *pBuf, uint16_t nBytes) - Function executes write sequence of n bytes.
  • void spillc_read(uint8_t *pBuf, uint16_t nBytes) - Function executes read sequence of n bytes.
  • void spillc_transfer(uint8_t *pIn, uint8_t *pOut, uint16_t nBytes) - Function should executes read/write sequence of n bytes.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes SPI module and sets CS pin as OUTPUT
  • Application Initialization - Initialization driver init
  • Application Task - (code snippet) - Counter passes through the loop and logs the value of the counter on the bargraph display

Note - Connection between BarGraph and SPI-LLC is made through SPI interface. You can connect a BarGraph click and SPI-LLC click with the wires to make the connection between click boards. We use the BarGraph click to demonstrate the functions of the SPI-LLC click.

void applicationTask()
{
    uint16_t convert;
    uint8_t tmp[2];
    uint8_t cnt;

    // BarGraph display
    for (cnt = 0; cnt <= 10; cnt++)
    {
        convert  = (uint16_t)((1 << cnt) - 1);
        tmp[1] = (convert & 0x00FF);
        tmp[0] = (convert & 0xFF00) >> 8;

        spillc_setCS(0);
        spillc_write(&tmp[0], 2);
        spillc_setCS(1);
        
        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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