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mikroSDK Library

ADC 7 click

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Author: MikroElektronika Team

Last Updated: 2018-08-01

Category: Other Codes

Downloaded: 228 times

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ADC 7 click is an advanced 32-bit analog to digital converter (ADC) which uses the LTC2500-32, a 32-bit oversampling SAR ADC with a configurable digital filter.

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mikroSDK Library Blog

ADC 7 click

ADC 7 click

Native view of the ADC 7 click board.

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ADC 7 click

ADC 7 click

Front and back view of the ADC 7 click board.

View full image

Library Description

The library can perform 32bit AD conversion and can read this 32bit converted voltage value with or without configuration byte/bytes. Library also offers a choice to set configuration for the next conversion cycles. It is not necessary to set configuration for each conversion. A user always can perform conversion cycle/cycles with the last entered configurations. The user can read the converted voltage value as 32bit digital value or as a value calculated in the mV unit. For more details check the documentation.

Key functions:

  • uint8_t adc7_setConfig( uint8_t gainConfig, uint8_t downSampFactor, uint8_t filterType ) - The function performs the device configuration by sending configuration data to configure the next conversion cycle.
  • void adc7_startConvCycle( void ) - The function generates the clock signal on MCK pin and on that way starts and performs the desired number of conversion cycles, determined by Down Sampling Factor number.
  • uint8_t adc7_readResults( int16_t *voltage ) - The function reads 32bit converted voltage value from A/D converter and calculates this value to mV.

Example description

The application is composed of three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes SPI interface and performs configuration for conversion cycles.
  • Application Task - (code snippet) - Performs the determined number of conversion cycles which are necessary for averaging.
void applicationTask()
{
 adc7_startConvCycle();

 while (adc7_checkDataReady() == _ADC7_DATA_NOT_READY);

 adc7_readResults( &voltageData );

 LongToStr( voltageData, text );
 mikrobus_logWrite( "Voltage: ", _LOG_TEXT );
 mikrobus_logWrite( text, _LOG_TEXT );
 mikrobus_logWrite( "mV", _LOG_LINE );

 Delay_ms( 200 );
}


Other mikroE Libraries used in the example:

  • Conversions
  • SPI
  • UART

Additional notes and information

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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