2024-09-02 23:06:55 +08:00
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.. zephyr:code-sample:: mcux_lpcmp
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:name: NXP MCUX Low-power Analog Comparator (LPCMP)
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:relevant-api: sensor_interface
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2024-04-24 23:02:44 +08:00
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2024-09-02 23:06:55 +08:00
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Get analog comparator data from an NXP MCUX Low-power Analog Comparator (LPCMP).
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2024-04-24 23:02:44 +08:00
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Overview
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********
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2024-09-02 23:06:55 +08:00
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This sample show how to use the NXP MCUX Low-power Analog Comparator (LPCMP) driver.
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2024-04-24 23:02:44 +08:00
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In this application, the negative input port of the LPCMP is set to 7 which
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means the input voltage comes from the LPCMP internal DAC, the reference
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voltage of the DAC is set to 0 (for the specific chip, the user needs to
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check the reference manual to confirm where this reference voltage comes
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from), the output voltage of the DAC is equal to (VREF/256)*(data+1), where
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data is set through the attribute ``SENSOR_ATTR_MCUX_LPCMP_DAC_OUTPUT_VOLTAGE``.
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The positive input port is set to 0, the user needs to check the reference
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manual and board schematic to confirm which specific port is used and can
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connect an external voltage to that port and change the input voltage to
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see the output change of the LPCMP.
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The output value of the LPCMP is reported on the console.
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Building and Running
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********************
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Building and Running for NXP FRDM-MCXN947
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=========================================
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2024-10-18 21:05:51 +08:00
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Build the application for the :zephyr:board:`frdm_mcxn947` board, and adjust the
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2024-04-24 23:02:44 +08:00
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LPCMP positive input port voltage by changing the voltage input to J2-17.
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.. zephyr-app-commands::
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:zephyr-app: samples/sensor/mcux_lpcmp
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:board: frdm_mcxn947//cpu0
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:goals: build flash
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:compact:
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2024-10-14 10:12:38 +08:00
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Building and Running for NXP FRDM-MCXN236
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=========================================
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2024-10-18 21:05:51 +08:00
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Build the application for the :zephyr:board:`frdm_mcxn236` board, and adjust the
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2024-10-14 10:12:38 +08:00
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LPCMP positive input port voltage by changing the voltage input to J2-8.
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.. zephyr-app-commands::
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:zephyr-app: samples/sensor/mcux_lpcmp
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:board: frdm_mcxn236
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:goals: build flash
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:compact:
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