AFE_NXP_Arduino 2.0.1 Analog Front-End (AFE) device operation sample code for Arduino

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AFE_NXP_Arduino

Analog Front End device operation sample code for Arduino

# What is this?

An Arduino library for NXP Analog Front End device with sample code.
This library provides simple API to get analog input channels.
Include device name header file (NAFE13388_UIM.h) to use those class libraries.

This repo shoiws some basic operations of AFE as well as practical samples to work with RTD, thermocouple and loadcell.

# Easy to use

3 types of Arduino UNO boards: R3, R4 Minima and R4 WiFi are supported.
Example sketches can be built and run on any of those boards.

Next is a sample of the basic operation of measureing analog voltage on AI1P and AI1N terminal.

#include <NAFE13388_UIM.h>
NAFE13388_UIM afe;
void setup() {
Serial.begin(115200);
Serial.println("\n***** Hello, NAFE13388! *****");
SPI.begin();
afe.begin();
afe.blink_leds();
afe.logical_channel[0].configure(0x1710, 0x00A4, 0xBC00, 0x0000);
afe.logical_channel[1].configure(0x2710, 0x00A4, 0xBC00, 0x0000);
Serial.println("\nlogical channel 0 (AI1P-GND) and 1 (AI2P-GND) voltages are shown in ADC readout value [V]");
}
void loop() {
Serial.print((NAFE13388_UIM::microvolt_t)afe.logical_channel[0] * 1e-6);
Serial.print(", ");
Serial.println((NAFE13388_UIM::microvolt_t)afe.logical_channel[1] * 1e-6);
}
NAFE13388_UIM.h
AFE_base::begin
virtual void begin(void)
Definition AFE_NXP.cpp:98
NAFE13388_Base::LogicalChannel::configure
void configure(const uint16_t(&cc)[4])
Definition AFE_NXP.cpp:56
NAFE13388_Base::logical_channel
LogicalChannel logical_channel[16]
Definition AFE_NXP.h:344
NAFE13388_UIM
Definition AFE_NXP.h:737
NAFE13388_UIM::blink_leds
void blink_leds(void)
Definition AFE_NXP.cpp:633

To try this sample code, set jumper plug on J91 to short AICOM and GND.
The analog input terminals are available as picture below.

Followings are pictures of UIM with UNO R3, UNO R4 Minima and UNO R4 WiFi boards.
On every picture, showing the hardware setting of..

- 3.3V are disconnected by using pin extender
- A jumper plug is set on J91
- D2 and D4 pins are shorted to enable to use DRDY signal

NAFE13388-UIM 8 Channels Universal Input AFE Evaluation Board with Arduino UNO R3

NAFE13388-UIM 8 Channels Universal Input AFE Evaluation Board with Arduino UNO R4 Minima

NAFE13388-UIM 8 Channels Universal Input AFE Evaluation Board with Arduino UNO R4 WiFi

> Note
> For proper voltage signal interfacing, connection between Arduino MCU board and NAFE13388-UIM board need to be modified. Remove 3.3V supply pin to let UIM to support 5V signaling.
> 3.3V supply pin is lifted at pin extender

> Diagram of 3.3V and 5V supply rails on NAFE13388-UIM board's schematic

> Using 5V supply on IOREF pin from Arduino board_

NAFExx388-EVB 8 Channels Universal Input AFE Evaluation Board with Arduino UNO R3

Analog-Front-End chip: NAFE13388

# Supported device

Type# | Features | Interface
--- | --- | ---
NAFE13388 | Highly Configurable 8 Channel ±25 V Universal Input Low Power Analog Front-End | SPI (mode1)
NAFE73388 | Highly Configurable 8 Channel ±25 V Universal Input Low Power Analog Front-End | SPI (mode1)
NAFE33352 | Software Configurable Input and Output Analog Front End | SPI (mode1)
NAFE93352 | Software Configurable Input and Output Analog Front End | SPI (mode1)

# Evaluation boards

Name | Header file | Features | Interface | Evaluation board
--- | --- | --- | --- | ---
NAFExx388-EVB | NAFE13388.h | General purpose evaluation board for NAFE13388 | SPI (mode1) | NAFE13388-UIM 8-Channel Universal Input AFE Arduino® Shield Board
NAFE13388-UIM | NAFE13388_UIM.h | AFE Arduino shield type evaluation board | SPI (mode1) | NAFE13388-UIM 8-Channel Universal Input AFE Arduino® Shield Board
NAFE33352-EVB | NAFE13388_UIM.h | AFE Arduino shield type evaluation board | SPI (mode1) | Software Configurable Universal AIO-AFE Evaluation Board
[NAFE33352-UIOM]() | NAFE13388_UIM.h | AFE Arduino shield type evaluation board | SPI (mode1) | [NAFE33352-UIOM Universal Input/OUTPUT AFE Arduino® Shield Board]()

# Getting started

How to setup? --> https://youtu.be/UEOFC0TwA6c

# What's inside?

## Examples

Examples are provided as scketch files.

### How to use?

After library install, Choose menu on Arduino-IDE: File→Examples→AFE_NXP_Arduino→ sketch for your try

### List of sample code

#### examples for NAFE13388

Sketch|Target|Feature|NOTE —|—|—|— NAFE13388_1_0_simple_SCSR|NAFE13388-UIM |**Simple** sample to get 2ch inputs| NAFE13388_1_1_simple_SCSR_using_DRDY_signal|NAFE13388-UIM |**Simple** sample to get 2ch inputs using DRDY signal|Need to short pins between D2 and D4 NAFE13388_2_0_multichannel_read_MCMR|NAFE13388-UIM |Get 8ch inputs using Multi-Channel Multi-Read command| NAFE13388_2_1_multichannel_read_MCMR_using_DRDY|NAFE13388-UIM |Get 8ch inputs using Multi-Channel Multi-Read command| Need to short pins between D2 and D4 NAFE13388_3_0_multichannel_read_MCCR_using_DRDY|NAFE13388-UIM |Get 8ch inputs using Multi-Channel Continuous-Read command| Need to short pins between D2 and D4 NAFE13388_4_0_LVMUX_multichannel_read_MCCR_using_DRDY|NAFE13388-UIM |Get 8ch inputs and LVMUX inputs (supply voltage, etc)|Need to short pins between D2 and D4 NAFE13388_5_0_RTD_4_wire|NAFE13388-UIM |Practical sample to measure temperature by 2 RTDs using internal current excitation source|Need to short pins between D2 and D4 NAFE13388_6_0_Thermocouple|NAFE13388-UIM |Practical sample to measure temperature by thermocouple with on-board RTD |Need to short pins between D2 and D4 NAFE13388_7_0_LoadCell|NAFE13388-UIM |Practical sample to measure loadcell output using internal voltage excitation source |Need to short pins between D2 and D4

#### examples for NAFE33352

Sketch | Target | Feature | NOTE
--- | --- | --- | ---
NAFE33352_1_0_ADC_and_DAC | NAFE33352-UIOM | A sample of ADC and DAC operation | Need to short pins between D2 and D4
NAFE33352_2_0_AIO_input | NAFE33352-UIOM | A sample of AIO (Analog Input/Output) channel used as an input | Need to short pins between D2 and D4

# Document

For details of the library, please find descriptions in this document.