rtd2  2.0.0.0
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RTD 2 click

RTD 2 Click is a compact add-on board used for applications with resistive elements that change resistance over temperature. This board features the ADS1247, 24-bit analog-to-digital converter with a programmable gain amplifier (PGA) for sensor measurement applications from Texas Instruments.

click Product page


Click library

  • Author : MikroE Team
  • Date : Sep 2020.
  • Type : SPI type

Software Support

We provide a library for the Rtd 2 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Rtd 2 Click driver.

Standard key functions :

Example key functions :

  • rtd2_check_new_data_ready The function check new data ready of the 4ADS1247 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement on the RTD 2 click board.
  • rtd2_get_temperature The function read output data and return ambient temperature from the PT100 3-wire temperature probe wired to the 4ADS1247 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement on the RTD 2 click board.
  • rtd2_enable_start The function enables ADC conversion of the 4ADS1247 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement on the RTD 2 click.
    void rtd2_enable_start ( rtd2_t *ctx, uint8_t en_start );

Examples Description

RTD 2 Click board is commonly used for measuring ambient temperature from the PT100 3-wire temperature probe.

The demo application is composed of two sections :

Application Init

Initializes the driver, performs a hardware reset, and sets the click default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
rtd2_cfg_setup( &cfg );
RTD2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
rtd2_init( &rtd2, &cfg );
Delay_ms ( 200 );
log_printf( &logger, "----- Hardware Reset ------\r\n" );
rtd2_hw_reset( &rtd2 );
Delay_ms ( 100 );
log_printf( &logger, "-- Default configuration --\r\n" );
rtd2_default_cfg( &rtd2 );
Delay_ms ( 1000 );
log_printf( &logger, "--------------------------\r\n" );
log_printf( &logger, " Start Measurement \r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms ( 100 );
}

Application Task

Reads an ambient temperature measured by the PT100 3-wire temperature probe connected to the RTD 2 click board, and logs the results on the USB UART each second.

void application_task ( void )
{
{
temperature = rtd2_get_temperature( &rtd2 );
log_printf( &logger, " Temperature : %.2f C\r\n", temperature );
log_printf( &logger, "--------------------------\r\n");
Delay_ms ( 1000 );
}
else
{
Delay_ms ( 1000 );
}
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.Rtd2

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.


RTD2_START_CONVERSION_DISABLE
#define RTD2_START_CONVERSION_DISABLE
Definition: rtd2.h:411
rtd2_get_temperature
float rtd2_get_temperature(rtd2_t *ctx)
Get temperature function.
rtd2_t
Click ctx object definition.
Definition: rtd2.h:443
rtd2_enable_start
void rtd2_enable_start(rtd2_t *ctx, uint8_t en_start)
Enable conversion start function.
rtd2_cfg_t
Click configuration structure definition.
Definition: rtd2.h:463
application_task
void application_task(void)
Definition: main.c:74
rtd2_check_new_data_ready
uint8_t rtd2_check_new_data_ready(rtd2_t *ctx)
Check new data ready function.
rtd2_cfg_setup
void rtd2_cfg_setup(rtd2_cfg_t *cfg)
Config Object Initialization function.
rtd2_default_cfg
void rtd2_default_cfg(rtd2_t *ctx)
Set default configuration function.
RTD2_NEW_DATA_IS_READY
#define RTD2_NEW_DATA_IS_READY
Definition: rtd2.h:420
rtd2_hw_reset
void rtd2_hw_reset(rtd2_t *ctx)
Hardware reset function.
RTD2_MAP_MIKROBUS
#define RTD2_MAP_MIKROBUS(cfg, mikrobus)
Definition: rtd2.h:68
application_init
void application_init(void)
Definition: main.c:36
rtd2_init
err_t rtd2_init(rtd2_t *ctx, rtd2_cfg_t *cfg)
Initialization function.