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mikroSDK Library

Qi Receiver click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-04-20

Category: Wireless Charging

Downloaded: 965 times

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License: MIT license  

Qi Receiver click is based on the P9025AC 5W Qi wireless power receiver integrated circuit, with the advanced Foreign Object Detection (FOD) feature, from IDT. The click utilizes the principles of the inductive coupling for the purpose of wireless power transfer.

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mikroSDK Library Blog

QI Receiver click

QI Receiver click

Native view of the QI Receiver click board.

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 Qi Receiver click

Qi Receiver click

Front and back view of the Qi Receiver click board.

View full image

Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing and reading
data in and from registers. The library includes a functions for reading voltage, amperage, frequncy as well as miscellaneous functions, such as UVLO threshold, AC clamp threshold, LDO current limit, charge complete, die temperature, and tx type. It allows to it's user to read unique IC identifier per WPC specification and to read or write Foreign Object Detection registers. It is also possible to set or clear enable input, over-temperature input, charge-end input and to check the state of status and interrupt pins. The library also has generic read and write functions that allow full usage of the Qi Receiver Click.

Key functions:

  • float qireceiver_readVoltage() - Function is used to measure current voltage in volt.
  • float qireceiver_readCurrent() - Function is used to measure current amperage in ampere.
  • float qireceiver_readFreq() - This function allows user to get the ALS value calculated to lux.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes GPIO, I2C and LOG structures, set INT and CS pins as input and RST, AN and PWM pins as output.
  • Application Initialization - Initalizes I2C driver, enables the device and makes an initial log.
  • Application Task - (code snippet) - This is an example that shows the most important                     functions that Qi Receiver click has, it mesures current voltage, amperage and frequency.
void applicationTask()
{
    char logTxt[ 50 ];
    float voltage;
    float current;
    float freq;
    
    voltage = qireceiver_readVoltage();
    FloatToStr( voltage, logTxt );
    mikrobus_logWrite( "Voltage : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_TEXT );
    mikrobus_logWrite( " V", _LOG_LINE );
    
    current = qireceiver_readCurrent();
    FloatToStr( current, logTxt );
    mikrobus_logWrite( "Current : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_TEXT );
    mikrobus_logWrite( " A", _LOG_LINE );
    
    freq = qireceiver_readFreq();
    FloatToStr( freq, logTxt );
    mikrobus_logWrite( "Frequency : ", _LOG_TEXT );
    mikrobus_logWrite( logTxt, _LOG_TEXT );
    mikrobus_logWrite( " Hz", _LOG_LINE );
    
    mikrobus_logWrite( "-----------------", _LOG_LINE );
    Delay_ms( 1000 );
}

Other mikroE Libraries used in the example:

  • I2C
  • UART
  • Conversions

Additional notes and informations

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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