Precisely gauge surface temperature without any contact with AMG8853 and ATmega1284
The infrared marvel: Object heat, revealed!
Published Nov 02, 2023
Click board™
Grid-EYE Click
Dev. board
EasyAVR v7
Compiler
NECTO Studio
MCU
ATmega1284
Say goodbye to physical contact and embrace wireless precision with our state-of-the-art infrared array sensor, unlocking the secrets of temperature through non-contact measurements
A
A
Hardware Overview
How does it work?
Grid-EYE Click is based on the AMG8853, an infrared array sensor from Panasonic Semi. It can detect the absolute surface temperature of an object without any contact, even a moving object such as a moving hand. The sensor senses the heat, so you don’t need light to form a picture. The temperature measuring range is from -20°C up to +100°C with a viewing angle of 60 degrees and a 5m detecting distance. It can be used in various applications. The AMG8853 has a built-in thermistor for suppressing ambient temperature noise. Infrared waves are outside the visible spectrum of the human eye, just like radio waves.
Even though people can’t see infrared waves, they can certainly feel them in the form of heat. Our bodies emit heat or infrared radiation, and the AMG8853 thermal array sensor can detect it. Grid-EYE Click uses a standard 2-Wire I2C interface to communicate with the host MCU, supporting fast mode. The I2C address can be selected over the ADDR SEL jumper with 0 selected by default. The AMG8853 works at 5V, and to work with a 3.3V logic level, this Click board™ features the PCA9306, a dual bidirectional I2C bus, and an SMBus voltage-level translator from Texas Instruments. The sensor features an interrupt
function over the INT pin. For logic level translation of the interrupt pin, this Click board™ uses the SN74LVC1T45, a single-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs from Texas Instruments. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
EasyAVR v7 is the seventh generation of AVR development boards specially designed for the needs of rapid development of embedded applications. It supports a wide range of 16-bit AVR microcontrollers from Microchip and has a broad set of unique functions, such as a powerful onboard mikroProg programmer and In-Circuit debugger over USB. The development board is well organized and designed so that the end-user has all the necessary elements in one place, such as switches, buttons, indicators, connectors, and others. With four different connectors for each port, EasyAVR v7 allows you to connect accessory boards, sensors, and custom electronics more
efficiently than ever. Each part of the EasyAVR v7 development board contains the components necessary for the most efficient operation of the same board. An integrated mikroProg, a fast USB 2.0 programmer with mikroICD hardware In-Circuit Debugger, offers many valuable programming/debugging options and seamless integration with the Mikroe software environment. Besides it also includes a clean and regulated power supply block for the development board. It can use a wide range of external power sources, including an external 12V power supply, 7-12V AC or 9-15V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B)
connector. Communication options such as USB-UART and RS-232 are also included, alongside the well-established mikroBUS™ standard, three display options (7-segment, graphical, and character-based LCD), and several different DIP sockets which cover a wide range of 16-bit AVR MCUs. EasyAVR v7 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
Architecture
AVR
MCU Memory (KB)
128
Silicon Vendor
Microchip
Pin count
40
RAM (Bytes)
16384
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the EasyAVR v7 as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for Grid-EYE Click driver.
Key functions:
grideye_generic_write- Generic write function.grideye_generic_read- Generic read function.grideye_write_data- Write data function.
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* \file
* \brief Grideye Click example
*
* # Description
* 64 individual thermal sensors build an image on a display. The detecting distance is 5m.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initalizes I2C driver, applies default settings, and makes an initial log.
*
* ## Application Task
* This example demonstrates the use of Grid-EYE click board by reading full grid and displaying values via USART terminal
*
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "grideye.h"
#define GRIDEYE_TEMP_COEF 0.25
// ------------------------------------------------------------------ VARIABLES
static grideye_t grideye;
static log_t logger;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
grideye_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.
grideye_cfg_setup( &cfg );
GRIDEYE_MAP_MIKROBUS( cfg, MIKROBUS_1 );
if ( grideye_init( &grideye, &cfg ) == GRIDEYE_INIT_ERROR )
{
log_info( &logger, "---- Application Init Error. ----" );
log_info( &logger, "---- Please, run program again... ----" );
for ( ; ; );
}
log_info( &logger, "---- Application Init Done. ----" );
grideye_default_cfg ( &grideye );
log_info( &logger, "---- Application Running... ----\n" );
}
void application_task ( void )
{
uint8_t i;
uint8_t j;
int16_t grid_array[ 64 ];
int16_t grid_array_tmp;
grideye_read_grid( &grideye, grid_array );
for( i = 1; i < 9; i++ )
{
for( j = 1; j < 9; j++ )
{
log_printf( &logger, "| " );
grid_array_tmp = grid_array[ i * j - 1 ];
log_printf( &logger, "%d ", (int16_t)( grid_array_tmp * GRIDEYE_TEMP_COEF ) );
}
log_printf( &logger, " \r\n" );
log_printf( &logger, "-------------------------------------- \r\n" );
}
Delay_ms( 1000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
