Enhance your altitude measurements with ICP-10100 and PIC32MZ2048EFM100
Soar to new heights
Published Oct 13, 2023
Click board™
Altitude 3 Click
Dev Board
Curiosity PIC32 MZ EF
Compiler
NECTO Studio
MCU
PIC32MZ2048EFM100
Trust in our altitude measurement solution to unlock the secrets of the skies and make informed decisions whether you're a researcher or an outdoor enthusiast
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Hardware Overview
How does it work?
Altitude 3 Click is based on the ICP-10100, a high accuracy, low power, waterproof barometric pressure and temperature sensor from TDK corporation. The sensor is manufactured using the ultra-low noise MEMS (Micro Electro Mechanical System) capacitive technology, optimized for precise altitude measurements. It can detect pressure difference with the accuracy of ±1 Pa, which translates to an altitude resolution of less than 10cm. This makes this sensor very usable in drone applications development, allowing it to hover at a fixed altitude, or to be used as the stabilization control. Also, this sensor has a very low temperature offset of only ±0.5 Pa/°C, within the range from 25°C to 45°C. Each sensor IC is factory calibrated and the calibration parameters are stored within the OTP memory. To convert the readings into temperature and pressure values, these coefficients need to be used. The datasheet of the ICP-10100 offers formulas for these
calculations. However, Altitude 3 Click comes with a library that contains functions that encapsulate these calculations, which greatly accelerates application development. Being packaged in a waterproof casing, the ICP-10100 sensor allows it to be used under 1.5m of water for the duration of 30 minutes. However, since the Click board™ itself is not waterproof, the sensor still offers a good resistance against increased humidity and moisture. The ICP-10100 sensor offers the best performance when operated within the normal pressure and temperature conditions within the range from 0°C to 45°C, and from 95 kPa to 105 kPa. The ICP-10100 can be operated in four different modes, allowing its performace to be tailored according to specific requirements. These modes allow a compromise between high precision, low noise, output speed, and power consumption. These modes include Low Power mode (LP), Normal mode (N), Low Noise mode
(LN) and Ultra Low Noise mode (ULN). The datasheet of the ICP-10100 contains a table that displays the conversion time, current consumption, and pressure measurement noise for each of these modes, allowing the optimal mode to be chosen. This Click board™ uses the I2C protocol to communicate with the host MCU. It contains two pull-up resistors for each of the I2C lines. The ICP-10100 is operated with only 1.8V. To provide this voltage, an additional IC had to be used. The BH18PB1WHFVCT is a small LDO regulator, providing the required voltage for the ICP-10100. Both I2C lines of the pressure sensor IC are pulled up to a 3.3V power rail though, allowing it to be operated by most MCUs that typically use 3.3V logic voltage levels. Please note that the Click board™ supports only 3.3V MCUs and it is not intended to be controlled with MCUs that use 5V without a proper level shifting circuitry.
Features overview
Development board
Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand
functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,
which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC32
MCU Memory (KB)
2048
Silicon Vendor
Microchip
Pin count
100
RAM (Bytes)
524288
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 Curiosity PIC32 MZ EF as your development board.
Track your results in real time
Application Output
After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.
After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.
Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.
Software Support
Library Description
This library contains API for Altitude 3 Click driver.
Key functions:
altitude3_soft_reset- Function sends a command to perform a SW Reset of the devicealtitude3_read_adc_results- Function reads results of AD conversion, which consists of the 16bit temperature and 24bit pressure data in determined orderaltitude3_get_data- Function performs a calibration data reading, only once, and then reads a temperature and pressure data and calculates these values to standard units
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 Altitude3 Click example
*
* # Description
* This application enables high-resolution barometric pressure measurement.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes I2C interface and performs a SW Reset of the device.
*
* ## Application Task
* Selects the desired measurement mode and data reading order, and after that
* calculates the temperature, pressure and altitude data to standard units and shows results to uart terminal.
*
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "altitude3.h"
// ------------------------------------------------------------------ VARIABLES
static altitude3_t altitude3;
static log_t logger;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
altitude3_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.
altitude3_cfg_setup( &cfg );
ALTITUDE3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
altitude3_init( &altitude3, &cfg );
altitude3_default_cfg ( &altitude3 );
log_printf( &logger, "** Altitude 3 click is initialized **\r\n\r\n" );
}
void application_task ( void )
{
uint8_t response;
response = altitude3_measurement_mode( &altitude3, ALTITUDE3_NORMAL_T_FIRST );
Delay_ms( 100 );
response = altitude3_get_data( &altitude3, response );
if ( response != ALTITUDE3_ERROR )
{
log_printf( &logger, "Temperature is : %d C\r\n", ( int16_t ) altitude3.sens_data.temperature );
log_printf( &logger, "Pressure is : %u mbar[hPa]\r\n", ( uint16_t ) altitude3.sens_data.pressure );
log_printf( &logger, "Altitude is : %d m\r\n\r\n", ( int16_t ) altitude3.sens_data.altitude );
Delay_ms( 400 );
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
