MPX4250A series (MPX4250A, MPXA4250A)

MPX4250A series (MPX4250A, MPXA4250A) is a pressure sensor IC (20 to 250 kPa) made by NXP Semiconductors. This posting will provide the OSS-ECAL(Open Source Software for Electronic Components Abstraction Layer) for MPX4250A series .
MCU interface : ADC

CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.

MPX4250A series (MPX4250A, MPXA4250A)

General description

The MPX4250A/MPXA4250A Manifold Absolute Pressure (MAP) sensor for engine control is designed to sense absolute air pressure within the intake manifold. This measurement can be used to compute the amount of fuel required for each cylinder. The MPX4250A/MPXA4250A piezoresistive transducer is a state-of-the-art monolithic silicon pressure sensor designed for a wide range of applications, particularly those employing a microcontroller or microprocessor with A/D inputs. This transducer combines advanced micromachining techniques, thin-film metallization, and bipolar processing to provide an accurate, high-level analog output signal that is proportional to the applied pressure. The small form factor and high reliability of on-chip integration make the NXP sensor a logical and economical choice for the automotive system engineer.

Feature

  • 1.5 % maximum error over 0 °C to 85 °C
  • Specifically designed for intake manifold absolute pressure sensing in engine control systems
  • Patented silicon shear stress strain gauge
  • Temperature compensated over –40 °C to +125 °C
  • Offers reduction in weight and volume compared to existing hybrid modules
  • Durable epoxy unibody element or thermoplastic small outline, surface mount package
  • Ideal for non-automotive applications
  • Available in three small outline packages and two unibody packages

Application

  • Turbo boost engine control
  • Ideally suited for microprocessor or microcontroller-based systems

OSS-ECAL specification

API Function

etSTS oMPX4250A( etCMD cmd, float32* rlt )

The oMPX4250A function is an API function that executes MPX4250A series (MPX4250A, MPXA4250A) processing according to the command in the argument.

Return valueetSTSOSS-ECAL status code
eSTS_FINCompleted successfully
eSTS_ERR_MINMinimum Pressure error (rlt is minimum Pressure)
eSTS_ERR_MAXMaximum Pressure error (rlt is maximum Pressure)
eSTS_ERR_HAL_ADCHAL ADC Error
eSTS_ERR_COMMAND_CODECommand selection error
eSTS_ERR_OTHERS_RUNOther components are executing the process
eSTS_ERR_HAL_OTHERS_RUNOther application is running HAL
eSTS_ERR_ADC_OBJECTAD conversion object selection error
Parameter INetCMD cmdOSS-ECAL command code
eCMD_STARTCommand to start AD conversion.
eCMD_READCommand that reads the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.

AD conversion value to Pressure conversion equation
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
eCMD_START_READCommand that starts AD conversion, waits for AD conversion to finish, reads out the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.

AD conversion value to Pressure conversion equation
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
Parameter OUTfloat32* rltPressure 20.0 to 250.0 [kPa]

Command Correspondence Table by HAL

ArduinoeCMD_START_READ
ARM MbedeCMD_START_READ
Debian(Linux)eCMD_START_READ
Infineon ModusToolboxeCMD_START_READ
NXP MCUXpresso iMXRT1051B_1052BeCMD_START
eCMD_READ
eCMD_START_READ
Renesas SSPeCMD_START
eCMD_READ
eCMD_START_READ
STM STM32Cube FW_F4eCMD_START
eCMD_READ
eCMD_START_READ
etSTS oMPX4250A_START(void)

The oMPX4250A_START function is an API function to start AD conversion of the MPX4250A series (MPX4250A, MPXA4250A).

Return valueetSTSOSS-ECAL status code
eSTS_FINCompleted successfully
eSTS_ERR_HAL_ADCHAL ADC Error
eSTS_ERR_OTHERS_RUNOther components are executing the process
eSTS_ERR_HAL_OTHERS_RUNOther application is running HAL
eSTS_ERR_ADC_OBJECTAD conversion object selection error

Function Correspondence Table by HAL

Arduino
ARM Mbed
Debian(Linux)
Infineon ModusToolbox
NXP MCUXpresso iMXRT1051B_1052BX
Renesas SSPX
STM STM32Cube FW_F4X
etSTS oMPX4250A_READ( float32* rlt )

The oMPX4250A_READ function is an API function that checks for the end of AD conversion of the MPX4250A series (MPX4250A, MPXA4250A), reads the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.

AD conversion value to Pressure conversion equation
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)

Return valueetSTSOSS-ECAL status code
eSTS_FINCompleted successfully
eSTS_ERR_MINMinimum Pressure error (rlt is minimum Pressure)
eSTS_ERR_MAXMaximum Pressure error (rlt is maximum Pressure)
eSTS_ERR_HAL_ADCHAL ADC Error
eSTS_ERR_TIMEOUTADC Timeout error (AUTOSAR only)
eSTS_ERR_OTHERS_RUNOther components are executing the process
eSTS_ERR_ADC_OBJECTAD conversion object selection error
Parameter OUTfloat32* rltPressure 20.0 to 250.0 [kPa]

Function Correspondence Table by HAL

Arduino
ARM Mbed
Debian(Linux)
Infineon ModusToolbox
NXP MCUXpresso iMXRT1051B_1052BX
Renesas SSPX
STM STM32Cube FW_F4XTime-out time HAL_MAX_DELAY
etSTS oMPX4250A_START_READ( float32* rlt )

The oMPX4250A_START_READ function is an API function that starts an AD conversion of the MPX4250A series (MPX4250A, MPXA4250A), waits for the AD conversion to finish, reads the AD conversion value, converts the AD conversion value to a Pressure characteristic, and stores the Pressure in rlt.

AD conversion value to Pressure conversion equation
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)

Return valueetSTSOSS-ECAL status code
eSTS_FINCompleted successfully
eSTS_ERR_MINMinimum Pressure error (rlt is minimum Pressure)
eSTS_ERR_MAXMaximum Pressure error (rlt is maximum Pressure)
eSTS_ERR_HAL_ADCHAL ADC Error
eSTS_ERR_OTHERS_RUNOther components are executing the process
eSTS_ERR_HAL_OTHERS_RUNOther application is running HAL
eSTS_ERR_ADC_OBJECTAD conversion object selection error
Parameter OUTfloat32* rltPressure 20.0 to 250.0 [kPa]

Function Correspondence Table by HAL

ArduinoX
ARM MbedX
Debian(Linux)X
Infineon ModusToolboxX
NXP MCUXpresso iMXRT1051B_1052BX
Renesas SSPX
STM STM32Cube FW_F4XTime-out time HAL_MAX_DELAY

Files

Folder*FileSummary
MPX4250A_HALNAME_VERSION/samplesample.c (.cpp)Sample Application Program
sample.hSample Application Header
MPX4250A_HALNAME_VERSIONoMPX4250A.c (.cpp)OSS-ECAL Program for MPX4250A series (MPX4250A, MPXA4250A)
oMPX4250A.hOSS-ECAL Header for MPX4250A series (MPX4250A, MPXA4250A)
MPX4250A_ARDUINO.inoSample application programs for Arduino
oss_ecal.hOSS-ECAL Common Header (Ver 01.00.00 or later, AUTOSAR is Ver 01.01.07 or later)
user_setting.c (.cpp)Const and Table of User setting
user_setting.hHeader of User setting
readme.mdReadme
OSS-ECAL Terms of Use.txtOSS-ECAL Terms of Use

* For HALNAME, please refer to HAL Support.

HAL Support List

HALMCU*Development environment*HALNAME
Arduino 1.8.6ATmega2560
ATmega328P
Mega 2560 Rev3
Arduino Pro Mini 3.3V
ARDUINO
ARM Mbed 6.17.0STM32F401RESTM32 Nucleo-64 boardsMBED
Infineon ModusToolbox HAL Cat1 2.4.3CYBLE-416045-02CY8CPROTO-063-BLE PSoC 6 BLE Prototyping KitModusToolbox
NXP MCUXpresso SDK
iMXRT1051B_1052B
ksdk2_0
MIMXRT1052DVL6AIMXRT1050-EVKBiMXRT1051B1052B
Renesas SSP 2.4.0R7FS7G27H3A01CFCS7G2 SKSSP
STM STM32Cube FW_F4 V1.27.1STM32F401RESTM32 Nucleo-64 boardsSTM32F4
Debian(Linux) v2022.04TI AM335xBeagleBone Black – Rev CLinux

* MCU and development environment at the time of development. Even if the same HAL is used, different MCUs and development environments may not work together.

OSS-ECAL Download

Please login before downloading. To register as a new user, please click here.
This OSS-ECAL is a sample version and can be downloaded without user registration, but please accept the OSS-ECAL Terms of Use before downloading.

If you are unable to download the File, please contact us and let us know the model number and HAL type. We will send you the file as an email attachment.

Built-in How to

How to incorporate OSS-ECAL into user programs

How to incorporate multiple OSS-ECALs in a user program (same MCU function)

How to incorporate multiple OSS-ECALs in a user program (different MCU function)

How to incorporate multiple identical electronic components into a user program

How to reduce the impact on user programs by replacing electronic components

CAUTION

The sample version of OSS-ECAL is not intended to be used with Threads (Tasks) or interrupts of different priority. Please do not use it as in the example below.

Example: If each sensor is assigned to the same ADC group and the OSS-ECAL API is executed in processes with different priorities, correct values may not be obtained.
ADC Gr0 Ch0 Temperature sensor AD22100A 100ms cycle Thread (low priority) to take in temperature
ADC Gr0 Ch1 Pressure sensor   MPX5999D Event interrupts (high priority) to take pressure

OSS-ECAL English
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