| .. _mcux_lpcmp: |
| |
| NXP MCUX Low-power Analog Comparator (LPCMP) |
| ############################################ |
| |
| Overview |
| ******** |
| |
| This sample show how to use the NXP MCUX Analog Comparator (LPCMP) driver. |
| |
| In this application, the negative input port of the LPCMP is set to 7 which |
| means the input voltage comes from the LPCMP internal DAC, the reference |
| voltage of the DAC is set to 0 (for the specific chip, the user needs to |
| check the reference manual to confirm where this reference voltage comes |
| from), the output voltage of the DAC is equal to (VREF/256)*(data+1), where |
| data is set through the attribute ``SENSOR_ATTR_MCUX_LPCMP_DAC_OUTPUT_VOLTAGE``. |
| The positive input port is set to 0, the user needs to check the reference |
| manual and board schematic to confirm which specific port is used and can |
| connect an external voltage to that port and change the input voltage to |
| see the output change of the LPCMP. |
| |
| The output value of the LPCMP is reported on the console. |
| |
| Building and Running |
| ******************** |
| |
| Building and Running for NXP FRDM-MCXN947 |
| ========================================= |
| Build the application for the :ref:`frdm_mcxn947` board, and adjust the |
| LPCMP positive input port voltage by changing the voltage input to J2-17. |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/sensor/mcux_lpcmp |
| :board: frdm_mcxn947//cpu0 |
| :goals: build flash |
| :compact: |
