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ISO ADC 6 Click is a compact add-on board that contains an eight-channel isolated ADC. This board features the AD7124-8, an 8-channel, low noise, low power, 24-bit, sigma-delta ADC from Analog Devices. The ADC has a programmable gain array (PGA) that allows gains of 1, 2, 4, 8, 16, 32, 64, and 128. Additionally, the ADC contains a 2.5V reference, which can be used with reference buffers, along with the externally applied references. The host MCU is isolated from the ADC by the ADuM341E, a 5kVrms quad digital isolator from Analog Devices.
- Author : Nenad Filipovic
- Date : Sep 2023.
- Type : SPI type
We provide a library for the ISO ADC 6 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 ISO ADC 6 Click driver.
isoadc6_cfg_setup
Config Object Initialization function.
void isoadc6_cfg_setup ( isoadc6_cfg_t *cfg );
isoadc6_init
Initialization function.
err_t isoadc6_init ( isoadc6_t *ctx, isoadc6_cfg_t *cfg );
isoadc6_default_cfg
Click Default Configuration function.
err_t isoadc6_default_cfg ( isoadc6_t *ctx );
isoadc6_get_voltage
ISO ADC 6 get voltage level function.
err_t isoadc6_get_voltage ( isoadc6_t* ctx, float *voltage );
isoadc6_get_adc_data
ISO ADC 6 get ADC data function.
err_t isoadc6_get_adc_data ( isoadc6_t* ctx, uint32_t *adc_data );
isoadc6_set_adc_control
ISO ADC 6 set ADC control function.
err_t isoadc6_set_adc_control ( isoadc6_t* ctx, uint16_t adc_ctrl_data );
This example demonstrates the use of the ISO ADC 6 Click board™ by reading and writing data by using SPI serial interface and reading results of AD conversion.
The demo application is composed of two sections :
Initialization of SPI module and log UART. After driver initialization, the app executes a default configuration which enables channel 0, puts A0 on positive analog input and A1 on negative analog input, enables internal reference voltage (approximately 2.65V (AVDD = 3.3V)), and also enables bipolar operation mode and puts device on full power mode.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
isoadc6_cfg_t isoadc6_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 );
log_info( &logger, " Application Init " );
// Click initialization.
isoadc6_cfg_setup( &isoadc6_cfg );
ISOADC6_MAP_MIKROBUS( isoadc6_cfg, MIKROBUS_1 );
if ( SPI_MASTER_ERROR == isoadc6_init( &isoadc6, &isoadc6_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( ISOADC6_ERROR == isoadc6_default_cfg ( &isoadc6 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
The demo application reads the voltage levels from analog input (A0-A1) and displays the results. Results are being sent to the UART Terminal, where you can track their changes.
void application_task ( void )
{
float voltage = 0;
if ( ISOADC6_OK == isoadc6_get_voltage( &isoadc6, &voltage ) )
{
log_printf( &logger, " Voltage: %.3f [V]\r\n", voltage );
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:
- MikroSDK.Board
- MikroSDK.Log
- Click.ISOADC6
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.