使用LMIS025B和STM32F031K6轻松监控和控制压力差

压力传感的数字卓越

VAV Press Click with Nucleo 32 with STM32F031K6 MCU

已发布 10月 01, 2024

点击板

VAV Press Click

开发板

Nucleo 32 with STM32F031K6 MCU

编译器

NECTO Studio

微控制器单元

STM32F031K6

我们的数字差压传感器经过精心设计，能够为从工业自动化到环境监测的广泛应用提供精确和可靠的读数。

硬件概览

它是如何工作的？

VAV Press Click 基于TE Connectivity的低差压传感器LMIS025B，该传感器提供数字输出，用于读取指定压力范围内的压力。创新的LMI技术具有卓越的灵敏度，尤其适用于0至25Pa / 0至0.25mbar（0.1英寸H2O）的超低压力。它基于通过传感器芯片内集成的微流通道进行气体的热流量测量。与其他基于流量的压力传感器相比，传感器内的极低气流确保了对灰尘污染、湿度和长管道的高免疫力，以及卓越的长期稳定性，

精度和专利的实时偏移补偿和线性化技术。LMIS025B提供两种操作模式：连续模式下的5ms采样时间，可提供近乎连续的压力数据流；低功耗模式下的400μA待机电流，可使设备从睡眠状态唤醒以“按需”提供压力数据。在任一模式下的第一次测量将在大约25 ms的预热和转换序列后可用。VAV Press Click通过标准I2C两线接口与MCU通信，通过16位sigma-delta A/D转换提供线性化的数字输出。此外，还可以通过将标记为

ADDR SEL的SMD跳线设置到标记为0和1的适当位置，选择其I2C从设备地址的最低有效位。此Click板™只能在3.3V逻辑电压水平下操作。在使用具有不同逻辑电平的MCU之前，必须进行适当的逻辑电压电平转换。此外，该Click板™配备了包含函数和示例代码的库，可作为进一步开发的参考。

功能概述

开发板

Nucleo 32开发板搭载STM32F031K6 MCU，提供了一种经济且灵活的平台，适用于使用32引脚封装的STM32微控制器进行实验。该开发板具有Arduino™ Nano连接性，便于通过专用扩展板进行功能扩展，并且支持mbed，使其能够无缝集成在线资源。板载集成

ST-LINK/V2-1调试器/编程器，支持通过USB重新枚举，提供三种接口：虚拟串口（Virtual Com port）、大容量存储和调试端口。该开发板的电源供应灵活，可通过USB VBUS或外部电源供电。此外，还配备了三个LED指示灯（LD1用于USB通信，LD2用于电源

指示，LD3为用户可控LED）和一个复位按钮。STM32 Nucleo-32开发板支持多种集成开发环境（IDEs），如IAR™、Keil®和基于GCC的IDE（如AC6 SW4STM32），使其成为开发人员的多功能工具。

Nucleo 32 with STM32F031K6 MCU double side image

微控制器概述

MCU卡片 / MCU

建筑

ARM Cortex-M0

MCU 内存 (KB)

硅供应商

STMicroelectronics

引脚数

RAM (字节)

4096

你完善了我！

配件

Click Shield for Nucleo-32是扩展您的开发板功能的理想选择，专为STM32 Nucleo-32引脚布局设计。Click Shield for Nucleo-32提供了两个mikroBUS™插座，可以添加来自我们不断增长的Click板™系列中的任何功能。从传感器和WiFi收发器到电机控制和音频放大器，我们应有尽有。Click Shield for Nucleo-32与STM32 Nucleo-32开发板兼容，为用户提供了一种经济且灵活的方式，使用任何STM32微控制器快速创建原型，并尝试各种性能、功耗和功能的组合。STM32 Nucleo-32开发板无需任何独立的探针，因为它集成了ST-LINK/V2-1调试器/编程器，并随附STM32全面的软件HAL库和各种打包的软件示例。这个开发平台为用户提供了一种简便且通用的方式，将STM32 Nucleo-32兼容开发板与他们喜欢的Click板™结合，应用于即将开展的项目中。

Click Shield for Nucleo-32 accessories 1 image

使用的MCU引脚

mikroBUS™映射器

RST

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM

INT

I2C Clock

PB6

SCL

I2C Data

PB7

SDA

Ground

GND

“仔细看看！”

Click board™ 原理图

一步一步来

项目组装

Click Shield for Nucleo-144 front image hardware assembly

从选择您的开发板和Click板™开始。以Nucleo 32 with STM32F031K6 MCU作为您的开发板开始。

Nucleo 144 with STM32L4A6ZG MCU front image hardware assembly

Stepper 22 Click front image hardware assembly

Stepper 22 Click complete accessories setup image hardware assembly

Nucleo-32 with STM32 MCU Access MB 1 - upright/background hardware assembly

STM32 M4 Clicker HA MCU/Select Step hardware assembly

Necto No Display image step 8 hardware assembly

Debug Image Necto Step hardware assembly

实时跟踪您的结果

应用程序输出

1. 应用程序输出 - 在调试模式下，“应用程序输出”窗口支持实时数据监控，直接提供执行结果的可视化。请按照提供的教程正确配置环境，以确保数据正确显示。

2. UART 终端 - 使用UART Terminal通过USB to UART converter监视数据传输，实现Click board™与开发系统之间的直接通信。请根据项目需求配置波特率和其他串行设置，以确保正常运行。有关分步设置说明，请参考提供的教程。

3. Plot 输出 - Plot功能提供了一种强大的方式来可视化实时传感器数据，使趋势分析、调试和多个数据点的对比变得更加直观。要正确设置，请按照提供的教程，其中包含使用Plot功能显示Click board™读数的分步示例。在代码中使用Plot功能时，请使用以下函数：plot(insert_graph_name, variable_name);。这是一个通用格式，用户需要将“insert_graph_name”替换为实际图表名称，并将“variable_name”替换为要显示的参数。

软件支持

库描述

该库包含 VAV Press Click 驱动程序的 API。

关键功能:

vavpress_set_default_sensor_param - VAV Press 设置默认传感器参数功能
vavpress_get_dif_press_and_temp - VAV Press 获取差压和温度功能
vavpress_retrieve_electronic_signature - VAV Press 获取电子签名功能

开源

代码示例

完整的应用程序代码和一个现成的项目可以通过NECTO Studio包管理器直接安装到NECTO Studio。应用程序代码也可以在MIKROE的GitHub账户中找到。

/*!
 * @file main.c
 * @brief VavPress Click example
 *
 * # Description
 * This library contains API for the Vav Press click driver.
 * This demo application shows an example of 
 * differential pressure and temperature measurement.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initialization of I2C module and log UART.
 * After driver initialization and default settings, 
 * the app display retrieve the electronic signature 
 * and set the sensor parameters data.
 *
 * ## Application Task
 * This is an example that shows the use of a Vav Press click board™.
 * Logs pressure difference value [ Pa ] and temperature [ degree Celsius ] value.
 * Results are being sent to the Usart Terminal where you can track their changes.
 * 
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "vavpress.h"

static vavpress_t vavpress;
static log_t logger;
static float diff_press;
static float temperature;
vavpress_el_signature_data_t el_signature_data;
vavpress_sensor_param_data_t param_data;

void application_init ( void ) {
    log_cfg_t log_cfg;            /**< Logger config object. */
    vavpress_cfg_t vavpress_cfg;  /**< Click config object. */

    /** 
     * 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_printf( &logger, "\r\n" );
    log_info( &logger, " Application Init " );

    // Click initialization.

    vavpress_cfg_setup( &vavpress_cfg );
    VAVPRESS_MAP_MIKROBUS( vavpress_cfg, MIKROBUS_1 );
    err_t init_flag = vavpress_init( &vavpress, &vavpress_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    vavpress_default_cfg ( &vavpress );
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
    
    vavpress_retrieve_electronic_signature( &vavpress, &el_signature_data );
    Delay_ms ( 100 );

    log_printf( &logger, "--------------------------------\r\n" );
    log_printf( &logger, " Firmware Version : %.3f        \r\n", el_signature_data.firmware_version );
    log_printf( &logger, " Pressure Range   : %d Pa       \r\n", el_signature_data.pressure_range );
    log_printf( &logger, " Part #           : %.11s       \r\n", el_signature_data.part_number );
    log_printf( &logger, " Lot #            : %.7s        \r\n", el_signature_data.lot_number );
    log_printf( &logger, " Output Type      : %c          \r\n", el_signature_data.output_type );
    log_printf( &logger, " Scale Factor     : %d          \r\n", el_signature_data.scale_factor );
    log_printf( &logger, " Calibration ID   : %.2s        \r\n", el_signature_data.calibration_id );
    log_printf( &logger, " Week number      : %d          \r\n", el_signature_data.week_number );
    log_printf( &logger, " Year number      : %d          \r\n", el_signature_data.year_number );
    log_printf( &logger, " Sequence number  : %d          \r\n", el_signature_data.sequence_number );
    log_printf( &logger, "--------------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    param_data.scale_factor_temp = 72;
    param_data.scale_factor_press = el_signature_data.scale_factor;
    param_data.readout_at_known_temperature = 50;
    param_data.known_temperature_c = 24.0;
    Delay_ms ( 100 );
}

void application_task ( void ) {   
    err_t error_flag = vavpress_get_dif_press_and_temp( &vavpress, &param_data, &diff_press, &temperature );
    if ( error_flag == VAVPRESS_OK ) {
        log_printf( &logger, " Diff. Pressure    : %.4f Pa\r\n", diff_press );
        log_printf( &logger, " Temperature       : %.4f C\r\n", temperature );
        log_printf( &logger, "--------------------------------\r\n" );
        Delay_ms ( 1000 ); 
        Delay_ms ( 1000 );
    } else {
        log_error( &logger, " Communcation Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END

/*!
 * @file main.c
 * @brief VavPress Click example
 *
 * # Description
 * This library contains API for the Vav Press click driver.
 * This demo application shows an example of 
 * differential pressure and temperature measurement.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initialization of I2C module and log UART.
 * After driver initialization and default settings, 
 * the app display retrieve the electronic signature 
 * and set the sensor parameters data.
 *
 * ## Application Task
 * This is an example that shows the use of a Vav Press click board™.
 * Logs pressure difference value [ Pa ] and temperature [ degree Celsius ] value.
 * Results are being sent to the Usart Terminal where you can track their changes.
 * 
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "vavpress.h"

static vavpress_t vavpress;
static log_t logger;
static float diff_press;
static float temperature;
vavpress_el_signature_data_t el_signature_data;
vavpress_sensor_param_data_t param_data;

void application_init ( void ) {
    log_cfg_t log_cfg;            /**< Logger config object. */
    vavpress_cfg_t vavpress_cfg;  /**< Click config object. */

    /** 
     * 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_printf( &logger, "\r\n" );
    log_info( &logger, " Application Init " );

    // Click initialization.

    vavpress_cfg_setup( &vavpress_cfg );
    VAVPRESS_MAP_MIKROBUS( vavpress_cfg, MIKROBUS_1 );
    err_t init_flag = vavpress_init( &vavpress, &vavpress_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    vavpress_default_cfg ( &vavpress );
    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
    
    vavpress_retrieve_electronic_signature( &vavpress, &el_signature_data );
    Delay_ms ( 100 );

    log_printf( &logger, "--------------------------------\r\n" );
    log_printf( &logger, " Firmware Version : %.3f        \r\n", el_signature_data.firmware_version );
    log_printf( &logger, " Pressure Range   : %d Pa       \r\n", el_signature_data.pressure_range );
    log_printf( &logger, " Part #           : %.11s       \r\n", el_signature_data.part_number );
    log_printf( &logger, " Lot #            : %.7s        \r\n", el_signature_data.lot_number );
    log_printf( &logger, " Output Type      : %c          \r\n", el_signature_data.output_type );
    log_printf( &logger, " Scale Factor     : %d          \r\n", el_signature_data.scale_factor );
    log_printf( &logger, " Calibration ID   : %.2s        \r\n", el_signature_data.calibration_id );
    log_printf( &logger, " Week number      : %d          \r\n", el_signature_data.week_number );
    log_printf( &logger, " Year number      : %d          \r\n", el_signature_data.year_number );
    log_printf( &logger, " Sequence number  : %d          \r\n", el_signature_data.sequence_number );
    log_printf( &logger, "--------------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    param_data.scale_factor_temp = 72;
    param_data.scale_factor_press = el_signature_data.scale_factor;
    param_data.readout_at_known_temperature = 50;
    param_data.known_temperature_c = 24.0;
    Delay_ms ( 100 );
}

void application_task ( void ) {   
    err_t error_flag = vavpress_get_dif_press_and_temp( &vavpress, &param_data, &diff_press, &temperature );
    if ( error_flag == VAVPRESS_OK ) {
        log_printf( &logger, " Diff. Pressure    : %.4f Pa\r\n", diff_press );
        log_printf( &logger, " Temperature       : %.4f C\r\n", temperature );
        log_printf( &logger, "--------------------------------\r\n" );
        Delay_ms ( 1000 ); 
        Delay_ms ( 1000 );
    } else {
        log_error( &logger, " Communcation Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END