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 )
Return value
Parameter IN
Parameter OUT
etSTS
etCMD cmd
float32* rlt
OSS-ECAL status code
OSS-ECAL command code
Pressure 20 to 250 [kPa]
etCMD
eCMD_START
Feature :
Command to start AD conversion.
Process :
1. AD conversion start.
Command API function :
etSTS oMPX4250A_START( void )
Return value :
eSTS_FIN
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT
NOTE :
Arduino, Mbeb, ModusToolbox not supported.
eCMD_READ
Feature :
Command that reads the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.
Process :
1. Read AD conversion value.
2. Convert AD conversion value to Pressure.
Voltage value = (AD conversion value × VDD) / (2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
3. Store Pressure to rlt.
Command API function :
etSTS oMPX4250A_READ( float32* rlt )
Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT
NOTE :
Please execute this API function after starting AD conversion.
Arduino, Mbeb, ModusToolbox not supported.
eCMD_START_READ
Feature :
Command 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.
Process :
1. Read AD conversion value.
2. Wait until AD conversion is completed.
3. Read AD conversion value.
4. Convert AD conversion value to Pressure.
Voltage value = (AD conversion value × VDD) / (2AD bit )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
5. Store Pressure to rlt.
Command API function :
etSTS oMPX4250A_START_READ( float32* rlt )
Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT
NOTE :
Files
Folder* | File | summary |
---|---|---|
MPX4250A_HALNAME/sample | sample.c (.cpp) | Sample Application Program |
| sample.h | Sample Application Header |
MPX4250A_HALNAME | oMPX4250A.c (.cpp) | OSS-ECAL Program for MPX4250A series |
| oMPX4250A.h | OSS-ECAL Header for MPX4250A series |
| oss_ecal.h | OSS-ECAL Common Header (Ver 01.00.00 or later) |
| user_setting.c (.cpp) | Const and Table of User setting |
| user_setting.h | Header of User setting |
| readme.md | Readme |
| OSS-ECAL Terms of Use.txt | OSS-ECAL Terms of Use |
* For HALNAME, please refer to HAL Support.
HAL Support List
MCU/Board manufacturer | HAL | MCU* | Development environment* | HALNAME |
---|---|---|---|---|
Arduino | Arduino 1.8.6 | ATmega2560 ATmega328P | Mega 2560 Rev3 Arduino Pro Mini 3.3V | ARDUINO |
ARM | Mbed 6.17.0 | STM32F401RETx | STM32 Nucleo-64 boards | MBED |
Infineon | ModusToolbox HAL Cat1 2.4.3 | CYBLE-416045-02 | CY8CPROTO-063-BLE PSoC 6 BLE Prototyping Kit | ModusToolbox |
NXP | MCUXpresso SDK iMXRT1051B_1052B ksdk2_0 | CYBLE-416045-02 | IMXRT1050-EVKB | iMXRT1051B1052B |
Renesas | SSP 2.4.0 | R7FS7G27H3A01CFC | S7G2 SK | SSP |
STM | STM32Cube FW_F4 V1.27.1 | STM32F401RETx | STM32 Nucleo-64 boards | STM32F4 |
NXP | AUTOSAR (MCAL) | MPC574XG-100DS | MPC574XG-MB( Motherboard) MPC574XG-100DS(Daughter boards) | MCAL |
* 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
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HAL | Download OSS-ECAL Ver |
---|---|
Arduino 1.8.6 | |
Mbed 6.17.0 | |
ModusToolbox HAL Cat1 2.4.3 | |
MCUXpresso SDK iMXRT1051B_1052B ksdk2_0 | |
SSP 2.4.0 | |
STM32Cube FW_F4 V1.27.1 | |
MCAL | under development |
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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