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Author: MIKROE
Last Updated: 2024-10-31
Package Version: 2.1.0.15
mikroSDK Library: 2.0.0.0
Category: DAC
Downloaded: 171 times
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License: MIT license
MUX 4 Click is a compact add-on board that contains a precise analog multiplexing IC. This board features the 74HC4851, 8-channel analog multiplexer/demultiplexer with injection-current effect control from Nexperia USA Inc.
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MUX 4 Click is a compact add-on board that contains a precise analog multiplexing IC. This board features the 74HC4851, 8-channel analog multiplexer/demultiplexer with injection-current effect control from Nexperia USA Inc.
We provide a library for the MUX4 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for MUX4 Click driver.
mux4_cfg_setup
Config Object Initialization function.
void mux4_cfg_setup ( mux4_cfg_t *cfg );
mux4_init
Initialization function.
err_t mux4_init ( mux4_t *ctx, mux4_cfg_t *cfg );
mux4_read_an_pin_voltage
This function reads results of AD conversion of the AN pin and converts them to proportional voltage level.
err_t mux4_read_an_pin_voltage ( mux4_t *ctx, float *data_out );
mux4_enable_input
This function enable or disables analog inputs.
void mux4_enable_input ( mux4_t *ctx, uint8_t en_state );
mux4_select_input
This function selects which input channel signal is being forwarded to the AN/EXT pin.
void mux4_select_input ( mux4_t *ctx, uint8_t input );
This example demonstrates the use of MUX 4 Click board.
The demo application is composed of two sections :
Initializes the driver and enables analog inputs.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
mux4_cfg_t mux4_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
Delay_ms ( 100 );
log_info( &logger, " Application Init " );
// Click initialization.
mux4_cfg_setup( &mux4_cfg );
MUX4_MAP_MIKROBUS( mux4_cfg, MIKROBUS_1 );
if ( ADC_ERROR == mux4_init( &mux4, &mux4_cfg ) )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
mux4_enable_input( &mux4, MUX4_ENABLE_INPUT );
}
Reads the voltage from all input channels and displays the values of each channel on the USB UART approximately every second.
void application_task ( void )
{
float mux4_an_voltage = 0;
for ( uint8_t cnt = MUX4_SELECT_INPUT_1; cnt <= MUX4_SELECT_INPUT_8; cnt++ )
{
mux4_select_input( &mux4, cnt );
Delay_ms ( 10 );
if ( ADC_ERROR != mux4_read_an_pin_voltage ( &mux4, &mux4_an_voltage ) )
{
log_printf( &logger, " CH%u Voltage : %.3f V\r\n", ( uint16_t ) cnt, mux4_an_voltage );
}
}
log_printf( &logger, " ----------------------------\r\n" );
Delay_ms ( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
Additional notes and informations
Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.