This is an overview of the MPXH6400A and the OSS-ECAL offering for the MPXH6400A. The MPXH6400A is a pressure sensor IC (20 kPa to 400 kPa) manufactured by NXP Semiconductors.
MCU interface : ADC
CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.
MPXH6400A
General description
The NXP MPXxx6400A series sensor integrates on-chip, bipolar op amp circuitry and thin film resistor networks to provide a high output signal and temperature compensation. The small form factor and high reliability of on-chip integration make this pressure sensor a logical and economical choice for the system designer.
The MPXxx6400A series piezoresistive transducer is a state-of-the-art, monolithic, signal conditioned, silicon pressure sensor. This sensor combines advanced micromachining techniques, thin film metallization, and bipolar semiconductor processing to provide an accurate, high level analog output signal that is proportional to applied pressure.
Feature
- Improved accuracy at high temperature
- Available in super small outline package
- 1.5% maximum error over 0 °C to 85 °C
- Fully calibrated and compensated
- Ideally suited for microprocessor or microcontroller-based systems
- Temperature compensated from -40 °C to +125 °C
- Durable thermoplastic surface mount package
- Package porting and mounting options enable tube attachment for liquefied natural gas (LPG) or remote sensing applications
Application
- Fuel injected car engines
- Vehicles powered by green gases (for example LPG and CNG)
- Small engines
- Industrial controls
OSS-ECAL specification
API Function
etSTS oMPXH6400A( etCMD cmd, float32* rlt )
The oMPXH6400A function is an API function that executes MPXH6400A processing according to the command in the argument.
| Return value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_MIN | Minimum Pressure error (rlt is minimum Pressure) | ||
| eSTS_ERR_MAX | Maximum Pressure error (rlt is maximum Pressure) | ||
| eSTS_ERR_HAL_ADC | HAL ADC Error | ||
| eSTS_ERR_COMMAND_CODE | Command selection error | ||
| eSTS_ERR_OTHERS_RUN | Other components are executing the process | ||
| eSTS_ERR_HAL_OTHERS_RUN | Other application is running HAL | ||
| eSTS_ERR_ADC_OBJECT | AD conversion object selection error | ||
| Parameter IN | etCMD cmd | OSS-ECAL command code | |
| eCMD_START | Command to start AD conversion. | ||
| eCMD_READ | Command 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_READ | 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. 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 OUT | float32* rlt | Pressure 20.0 to 400.0 [kPa] |
Command Correspondence Table by HAL
| Arduino | eCMD_START_READ |
| ARM Mbed | eCMD_START_READ |
| AUTOSAR | – |
| Infineon ModusToolbox | eCMD_START_READ |
| NXP MCUXpresso iMXRT1051B_1052B | eCMD_START eCMD_READ eCMD_START_READ |
| Renesas SSP | eCMD_START eCMD_READ eCMD_START_READ |
| STM STM32Cube FW_F4 | eCMD_START eCMD_READ eCMD_START_READ |
etSTS oMPXH6400A_START(void)
The oMPXH6400A_START function is an API function to start AD conversion of the MPXH6400A.
| Return value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_HAL_ADC | HAL ADC Error | ||
| eSTS_ERR_OTHERS_RUN | Other components are executing the process | ||
| eSTS_ERR_HAL_OTHERS_RUN | Other application is running HAL | ||
| eSTS_ERR_ADC_OBJECT | AD conversion object selection error |
Function Correspondence Table by HAL
| Arduino | – |
| ARM Mbed | – |
| AUTOSAR | X |
| Infineon ModusToolbox | – |
| NXP MCUXpresso iMXRT1051B_1052B | X |
| Renesas SSP | X |
| STM STM32Cube FW_F4 | X |
etSTS oMPXH6400A_READ( float32* rlt )
The oMPXH6400A_READ function is an API function that checks for the end of AD conversion of the MPXH6400A, 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 value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_MIN | Minimum Pressure error (rlt is minimum Pressure) | ||
| eSTS_ERR_MAX | Maximum Pressure error (rlt is maximum Pressure) | ||
| eSTS_ERR_HAL_ADC | HAL ADC Error | ||
| eSTS_ERR_TIMEOUT | ADC Timeout error (AUTOSAR only) | ||
| eSTS_ERR_OTHERS_RUN | Other components are executing the process | ||
| eSTS_ERR_ADC_OBJECT | AD conversion object selection error | ||
| Parameter OUT | float32* rlt | Pressure 20.0 to 400.0 [kPa] |
Function Correspondence Table by HAL
| Arduino | – | |
| ARM Mbed | – | |
| AUTOSAR | X | Time-out time ADC_TIMEOUT [us] setting |
| Infineon ModusToolbox | – | |
| NXP MCUXpresso iMXRT1051B_1052B | X | |
| Renesas SSP | X | |
| STM STM32Cube FW_F4 | X | Time-out time HAL_MAX_DELAY |
etSTS oMPXH6400A_START_READ( float32* rlt )
The oMPXH6400A_START_READ function is an API function that starts an AD conversion of the MPXH6400A, 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 value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_MIN | Minimum Pressure error (rlt is minimum Pressure) | ||
| eSTS_ERR_MAX | Maximum Pressure error (rlt is maximum Pressure) | ||
| eSTS_ERR_HAL_ADC | HAL ADC Error | ||
| eSTS_ERR_OTHERS_RUN | Other components are executing the process | ||
| eSTS_ERR_HAL_OTHERS_RUN | Other application is running HAL | ||
| eSTS_ERR_ADC_OBJECT | AD conversion object selection error | ||
| Parameter OUT | float32* rlt | Pressure 20.0 to 400.0 [kPa] |
Function Correspondence Table by HAL
| Arduino | X | |
| ARM Mbed | X | |
| AUTOSAR | – | |
| Infineon ModusToolbox | X | |
| NXP MCUXpresso iMXRT1051B_1052B | X | |
| Renesas SSP | X | |
| STM STM32Cube FW_F4 | X | Time-out time HAL_MAX_DELAY |
API functions for AUTOSAR
In AUTOSAR, the ADC group and channels of the MCU may be registered to the MCAL ADC channel group for AD conversion. In such a case, use the following API functions.
etSTS oMCAL_ADC_GR_START( Adc_GroupType gr )
The oMCAL_ADC_GR_START function is an API function that initiates conversion of a ADC channel group.
| Return value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_HAL_BUSY | HAL running | ||
| Parameter IN | Adc_GroupType gr | ID value of ADC channel group |
etSTS oMCAL_ADC_GR_READ( Adc_GroupType gr, Adc_ValueGroupType* buf )
The oMCAL_ADC_GR_READ function is an API function that checks the end of ADC conversion for the ADC channel group, reads each AD conversion value, and stores each AD conversion value in buf. This function has a Timeout function and should be used with the ADC_TIMEOUT value set.
| Return value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_HAL_ADC | HAL ADC Error | ||
| eSTS_ERR_TIMEOUT | ADC Timeout error (AUTOSAR only) | ||
| sSTS_ERR_PROCESS | The return value of the Adc_GetGroupStatus function is other than the following value. ADC_STREAM_COMPLETED ADC_BUSY | ||
| Parameter IN | Adc_GroupType gr | ID value of ADC channel group | |
| Parameter OUT | Adc_ValueGroupType* buf | First address of buffer of ADC channel group |
etSTS oPRC_CHAR_CONV_L_FF( sint32 before, const stCOEF_L_FF coef, float32* rlt )
The oPRC_CHAR_CONV_L_FF function is a common process function. This function converts the value of the argument before (AD conversion value) to a voltage, converts the voltage linearly by the constant coef, and limits the converted value by the maximum minimum value.
| Return value | etSTS | OSS-ECAL status code | |
| eSTS_FIN | Completed successfully | ||
| eSTS_ERR_MIN | Minimum temperature error (rlt is minimum temperature) | ||
| eSTS_ERR_MAX | Maximum temperature error (rlt is maximum temperature) | ||
| Parameter OUT | float32* rlt | Pressure 20.0 to 400.0 [kPa] |
HAL Support
OSS-ECAL’s HAL support is as follows (expanding sequentially). Please check each electronic component’s OSS-ECAL page for HAL support. Please note that even the same HAL may not work with different versions, MCUs, or development environments.
| Manufacturer | SDK/IDE Tool | HAL Name | Ver | Support |
|---|---|---|---|---|
| Arduino | Arduino IDE | Arduino | 1.8.6 | X |
| Arm | Keil MDK v6 | Mbed OS | 6.17.0 | X |
| Debian | – | GNU/Linux | 10.3 | – |
| Infineon | ModusToolbox | mtb-hal-cat1 | 2.4.3 | X |
| NXP | MCUXpresso SDK | SDK_2.x_EVKB-IMXRT1050 | 2.16 | X |
| NXP | PlatformSDK_S32K1_2022_02 | AUTOSAR MCAL | 4.4 | X |
| Renesas | Synergy Software Package | HAL | 2.6.0 | X |
| STMicroelectronics | STM32Cube | STM32CubeF4 | V1.28.1 | X |
Development environment
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.
| HALNAME | Manufacturer | Board | MCU | IDE |
|---|---|---|---|---|
| ARDUINO | Arduino | 1.Mega 2560 Rev3 2.Arduino Pro Mini 3.3V | ATmega2560 ATmega328P | Arduino IDE 2.3.3 |
| MBED | STMicroelectronics | STM32 Nucleo-64 boards | STM32F401RETx | Arm Keil Studio Cloud |
| Linux | BeagleBoard | BeagleBone Black | TI AM335x | – |
| ModusToolbox | Infineon | CY8CPROTO-063-BLE PSoC 6 BLE Prototyping Kit | CYBLE-416045-02 | ModusToolbox |
| iMXRT1051B1052B | NXP | IMXRT1050-EVKB | i.MX RT1050 | MCUXpresso IDE |
| MCAL | STMicroelectronics | S32K144EVB-Q100 | S32K144 | S32 Design Studio for S32 Platform |
| SSP | Renesas | S7G2 SK | R7FS7G27H3A01CFC | e² studio for Renesas Synergy |
| STM32F4 | STMicroelectronics | STM32 Nucleo-64 boards | STM32F401RETx | STM32CubeIDE |
File Structure
| Folder | File | Summary |
|---|---|---|
| MPXH6400A_HALNAME_010000/sample | sample.c (.cpp) | Sample application program |
| sample.h | Sample application header | |
| MPXH6400A_HALNAME_010000 | oMPXH6400A.c (.cpp) | OSS-ECAL program for MPXH6400A |
| oMPXH6400A.h | OSS-ECAL header for MPXH6400A | |
| oss_ecal.h | OSS-ECAL common header | |
| MPXH6400A_ARDUINO.ino | Sample application programs for Arduino | |
| oTypes.h | Typedef header file for AUTOSAR | |
| user_setting.c (.cpp) | User configured constants and tables | |
| user_setting.h | User configuration Header | |
| oHAL_i2c_stm32f4.c | HAL Program for STM32Cube FW_F4 | |
| oHAL_i2c_stm32f4.h | HAL Header for STM32Cube FW_F4 | |
| readme.md | Readme | |
| OSS-ECAL Terms of Use.txt | OSS-ECAL Terms of Use |
* For HALNAME, please refer to HAL Support.
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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
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