Ensure precise object detection with MAX44000 and MKV42F64VLH16
See what's near with clarity!
Published Jun 21, 2023
Click board™
PROXIMITY 2 Click
Dev Board
Fusion for ARM v8
Compiler
NECTO Studio
MCU
MKV42F64VLH16
Enhance safety and efficiency with real-time detection of nearby objects or individuals
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Hardware Overview
How does it work?
Proximity 2 Click is based on the MAX44000, a wide-dynamic range ambient light sensor with an integrated infrared proximity sensor from Analog Devices. Designed using proprietary BiCMOS technology, the MAX44000 combines three optical sensors, two A/D converters, and digital functionality into one package. A MAX44000's photodiode array converts the light to a current, processed by low-power circuitry into a digital value which is then stored in an output register and later read by an I2C serial interface. This feature allows the MAX44000 to replicate the human eye's optical response in various environments. The infrared proximity photodiodes are optimized for better sensitivity for
near-infrared signals, specifically 850nm, and can be used for proximity sensor measurements. The proximity sensing uses an external, pulsed infrared LED source, the SFH 4651-Z, to emit controlled amounts of infrared radiation. When the SFH 4651-Z reflects some of this infrared radiation to the MAX44000, it is detected by the integrated light detector and then used to determine the object's proximity to the sensor. It is essential to note that different objects at the same distance from the sensor can reflect different amounts of infrared radiation depending on their texture and color. The MAX44000 communicates with the MCU using the standard I2C 2-Wire interface with a maximum frequency of 400kHz. This Click board™
also supports a programmable interrupt feature, routed to the INT pin on the mikroBUS™ socket, that simplifies and improves system efficiency by eliminating the need to poll a sensor for a data (ambient light or proximity receive interrupt has occurred), resulting in a significant power saving. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Fusion for ARM v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different ARM® Cortex®-M based MCUs regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for ARM v8 provides a fluid and immersive working experience, allowing access anywhere and under any
circumstances at any time. Each part of the Fusion for ARM v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.
Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for ARM v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Type
8th Generation
Architecture
ARM Cortex-M4
MCU Memory (KB)
64
Silicon Vendor
NXP
Pin count
64
RAM (Bytes)
16384
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Fusion for ARM v8 as your development board.
Track your results in real time
Application Output
After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.
Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.
In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".
The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.
Software Support
Library Description
This library contains API for Proximity 2 Click driver.
Key functions:
proximity2_read_prox- Read PROX Data Register functionproximity2_read_als- Read ALS Data Registers function
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* \file
* \brief Proximity2 Click example
*
* # Description
* This is an example that shows the most important
* functions that Proximity 2 click has.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Configuring clicks and log objects.
* Setting the click in the default configuration.
*
* ## Application Task
* Shows the most important proximity and ambient value.
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "proximity2.h"
// ------------------------------------------------------------------ VARIABLES
static proximity2_t proximity2;
static log_t logger;
static uint8_t proxi_val;
static uint16_t ambient;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
proximity2_cfg_t cfg;
/**
* 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.
proximity2_cfg_setup( &cfg );
PROXIMITY2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
proximity2_init( &proximity2, &cfg );
proximity2_default_cfg ( &proximity2 );
log_info( &logger, "Application Init" );
Delay_ms( 1000 );
}
void application_task ( void )
{
proxi_val = proximity2_read_prox ( &proximity2 );
ambient = proximity2_read_als ( &proximity2 );
log_printf( &logger, " Proximity ADC : %d \r\n", (uint16_t)proxi_val );
log_printf( &logger, " Light : %d \r\n", ambient );
log_printf( &logger, "------------------\r\n" );
Delay_ms( 300 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
