Click board current loop example

This folder contains the source files for the demonstration project on current loop using Click boards "4-20 mA T click board" and "4-20 mA R click board".

The project shows how to configure current loop between two standalone devices (e.g. Raspberry Pi) with transmitter and receiver connected by pair of wires.

Prerequisites

• REXYGEN Runtime Core must be installed and running on both target devices (e.g. Raspberry Pi).
• SPI bus must be enabled and available on both target devices (e.g. /dev/spidev0.0).
• Click boards installed on target devices (e.g. Pi click shield for Raspberry Pi or directly to SPI pins)
• The wiring between transmiter and receiver (current loop).

Running the example (same for both devices)##

• The *exec.mdl file is the project main file.
• Open it with REXYGEN Studio.
• Specify the SPI bus by the "p0" parameter of the REXLANG function block.
• Compile and download corresponding project to the target device according to the installed click board.
• Setup desired current by "CNR_current" in "4_20mA_T_click_task" (transmitter) and see the output of "LIN" block in "4_20mA_R_click_task" (receiver).

Documentation

• Press F1 for help on the selected function block in the REXYGEN Studio.
• Getting started with REXYGEN on the Raspberry Pi minicomputer
• Function blocks of REXYGEN
• [4-20 mA R click board] (http://www.mikroe.com/click/4-20ma-r/)
• [4-20 mA T click board] (http://www.mikroe.com/click/4-20ma-t/)
• MCP24921 datasheet, MCP3201 datasheet (attached in transmitter and receiver folders)
• REXYGEN Studio User Guide
• Complete documentation of REXYGEN

Additional information

• Raspberry Pi is a trademark of the Raspberry Pi Foundation.
• Visit the REXYGEN webpage for more information about the example projects and developing advanced automation and control solutions using REXYGEN.
• [MikroElektronika] (http://www.mikroe.com/)