analogmux4  2.0.0.0
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Analog MUX 4 click

Analog MUX 4 Click is a compact add-on board that switches one of many analog inputs to one digital output. This board features the TMUX1308, a general-purpose 8:1 single-ended CMOS multiplexer (MUX) from Texas Instruments. The TMUX1308 has an internal injection current control which eliminates the need for external diode and resistor networks to protect the switch and keep the input signals within the supply voltage. It also supports bidirectional analog and digital signals ranging from 0 to 5V, alongside several protection features allowing a reliable operation and protecting the device from potential damage.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Aug 2021.
  • Type : ADC type

Software Support

We provide a library for the AnalogMUX4 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.

Library Description

This library contains API for AnalogMUX4 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Analog MUX 4 click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and enables the analog inputs.

void application_init ( void )
{
log_cfg_t log_cfg;
analogmux4_cfg_t analogmux4_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
analogmux4_cfg_setup( &analogmux4_cfg );
ANALOGMUX4_MAP_MIKROBUS( analogmux4_cfg, MIKROBUS_1 );
if ( ADC_ERROR == analogmux4_init( &analogmux4, &analogmux4_cfg ) )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
analogmux4_enable_input ( &analogmux4 );
log_info( &logger, " Application Task " );
}

Application Task

Reads and displays the voltage of all channels on the USB UART approximately once per second.

void application_task ( void )
{
float analogmux4_an_voltage = 0;
for ( uint8_t cnt = ANALOGMUX4_CHANNEL_0; cnt <= ANALOGMUX4_CHANNEL_7; cnt++ )
{
analogmux4_set_input_channel ( &analogmux4, cnt );
if ( ADC_ERROR != analogmux4_read_an_pin_voltage ( &analogmux4, &analogmux4_an_voltage ) )
{
log_printf( &logger, " AN%u voltage : %.3f V\r\n", ( uint16_t ) cnt, analogmux4_an_voltage );
}
}
log_printf( &logger, "\r\n" );
Delay_ms( 1000 );
}

Note

The channel's voltage will "float" when the voltage source is not connected to it.

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:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.AnalogMUX4

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.


analogmux4_enable_input
void analogmux4_enable_input(analogmux4_t *ctx)
Analog MUX 4 enable input function.
ANALOGMUX4_CHANNEL_7
#define ANALOGMUX4_CHANNEL_7
Definition: analogmux4.h:66
ANALOGMUX4_CHANNEL_0
#define ANALOGMUX4_CHANNEL_0
Analog MUX 4 ADC channel number.
Definition: analogmux4.h:59
application_task
void application_task(void)
Definition: main.c:63
analogmux4_cfg_t
Analog MUX 4 Click configuration object.
Definition: analogmux4.h:114
analogmux4_t
Analog MUX 4 Click context object.
Definition: analogmux4.h:99
analogmux4_read_an_pin_voltage
err_t analogmux4_read_an_pin_voltage(analogmux4_t *ctx, float *data_out)
Analog MUX 4 read AN pin voltage level function.
analogmux4_cfg_setup
void analogmux4_cfg_setup(analogmux4_cfg_t *cfg)
Analog MUX 4 configuration object setup function.
application_init
void application_init(void)
Definition: main.c:30
ANALOGMUX4_MAP_MIKROBUS
#define ANALOGMUX4_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: analogmux4.h:84
analogmux4_init
err_t analogmux4_init(analogmux4_t *ctx, analogmux4_cfg_t *cfg)
Analog MUX 4 initialization function.
analogmux4_set_input_channel
void analogmux4_set_input_channel(analogmux4_t *ctx, uint8_t channel)
Analog MUX 4 set input channel function.