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mikroSDK Library

AM/FM click

Rating:

5

Author: MIKROE

Last Updated: 2019-10-21

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: FM

Downloaded: 3887 times

Not followed.

License: MIT license  

AM/FM Click is a RADIO RECEIVER click board that can be used to listen to music from the AM and FM radio bands.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

AM/FM Click

AM/FM Click

Native view of the AM/FM Click board.

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AM/FM Click

AM/FM Click

Front and back view of the AM/FM Click board.

View full image

Library Description

Library contains function for sending commands and command arguments to device Library contains function for checking states of INT, AND, RST and CS pins Library contains function for receiving status byte of a device Library contains functions for checking states of specific interrupt bits in status byte Library contains function for receiving response bytes from a device Library contains function for device initialization Library contains function for seeking channels Library contains function for setting volume Library contains function for muting/unmuting device Library contains function for tuning frequency up/down Library contains function for getting current channel value Library contains constants for commands, arguments and properties.

Key functions:

  • uint8_t amfm_sendCommand( uint8_t * cmdAndArgsBuf_ ) - sends command and command arguments to device
  • uint8_t amfm_getCts( void ) - checks CTS bit state and returns 0/1 if CTS bit did/did not go HIGH in less than 500 cycles
  • uint8_t amfm_getResponse( uint8_t * respBuf_, uint8_t nBytes_ ) - returns a device response into a respBuf_ after receiving CTS

Examples description

The application is composed of three sections :

  • System Initialization - Initializes I2C, LOG, AN pin as INPUT, INT pin as INPUT, RST pin as OUTPUT, CS pin as OUTPUT
  • Application Initialization - Initializes I2C driver and initializes the device
  • Application Task - Executes aditional functions based on user input
void applicationTask( )
{
    dataReady = UART_Rdy_Ptr( );

if (dataReady != 0)
    {
        receivedData = UART_Rd_Ptr( );

    switch (receivedData)
        {
            case 's' :
            {
                amfm_caseSeek( );
                break;
            }
            case '+' :
            {
                amfm_casePlus( );
                break;
            }
            case '-' :
            {
                amfm_caseMinus( );
                break;
            }
            case 'm' :
            {
                amfm_caseMemorize( );
                break;
            }
            case 'i' :
            {
                amfm_caseMute( );
                break;
            }
            case 'u' :
            {
                amfm_caseTuneUp( );
                break;
            }
            case 'd' :
            {
                amfm_caseTuneDown( );
                break;
            }
            case '1' :
            {
                amfm_caseStation1( );
                break;
            }
            case '2' :
            {
                amfm_caseStation2( );
                break;
            }
            case '3' :
            {
                amfm_caseStation3( );
                break;
            }
            case '4' :
            {
                amfm_caseStation4( );
                break;
            }
            case '5' :
            {
                amfm_caseStation5( );
                break;
            }
            default :
            {
                mikrobus_logWrite( "> > > > > !!! WRONG COMMAND !!!  < < < < <", _LOG_LINE );
                break;
            }
        }
    }
}

Additional Functions :

  • void amfm_caseMemorize( ) - memorizes up to 5 stations
  • void amfm_caseStation1( ) - tunes station 1
  • void amfm_caseStation2( ) - tunes station 2
  • void amfm_caseStation3( ) - tunes station 3
  • void amfm_caseStation4( ) - tunes station 4
  • void amfm_caseStation5( ) - tunes station 5
  • void amfm_caseSeek( ) - seeks next station
  • void amfm_casePlus( ) - increases volume up to max value
  • void amfm_caseMinus( - decreases volume down to min value
  • void amfm_caseMute( ) - mutes the device
  • void amfm_caseTuneUp( ) - increments station frequency for 10 KHz
  • void amfm_caseTuneDown( ) - decrements station frequency for 10 KHz

Other mikroE Libraries used in the example:

  • I2C
  • Conversions
  • UART

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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