| .. zephyr:code-sample:: renesas_comparator |
| :name: Renesas comparator |
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| Monitor the output of comparator. |
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| Overview |
| ******** |
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| A sample that help to monitor the output of comparator. |
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| Hardware Setup |
| ************** |
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| * The IVREF is connected to the internal output of DA0 (DAC module). |
| By default, DA0 is set to ~1.75V (half of the full-scale voltage). |
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| * For IVCOMP, the user can connect the IVCMP3 input to either: |
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| * Case 1: IVCMP3 with SW0 (button on board, on ek_ra8m1 is P600). |
| * Case 2: IVCMP3 with external voltage for comparison. |
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| Building and Running |
| ******************** |
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| This application can be built and executed on RA boards as follows: |
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| .. zephyr-app-commands:: |
| :zephyr-app: samples/boards/renesas/comparator |
| :board: ek_ra8m1 |
| :goals: build flash |
| :compact: |
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| The comparator's output controls LED0: |
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| * If the comparator output is HIGH, LED0 turns on. |
| * If the comparator output is LOW, LED0 turns off. |
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| Example case: |
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| * Case 1: IVCMP3 connected to SW0 (Pull up) |
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| * SW0 not pressed --> Comparator output HIGH --> LED0 on |
| * SW0 pressed --> Comparator output LOW --> LED0 off |
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| * Case 2: IVCMP3 connected to another reference voltage |
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| * IVCMP3 HIGH --> Comparator output HIGH --> LED0 on |
| * IVCMP3 LOW --> Comparator output LOW --> LED0 off |
