README.rst
1.. zephyr:code-sample:: renesas_comparator
2 :name: Renesas comparator
3
4 Monitor the output of comparator.
5
6Overview
7********
8
9A sample that help to monitor the output of comparator.
10
11Hardware Setup
12**************
13
14* The IVREF is connected to the internal output of DA0 (DAC module).
15 By default, DA0 is set to ~1.75V (half of the full-scale voltage).
16
17* For IVCOMP, the user can connect the IVCMP3 input to either:
18
19 * Case 1: IVCMP3 with SW0 (button on board, on ek_ra8m1 is P600).
20 * Case 2: IVCMP3 with external voltage for comparison.
21
22Building and Running
23********************
24
25This application can be built and executed on RA boards as follows:
26
27.. zephyr-app-commands::
28 :zephyr-app: samples/boards/renesas/comparator
29 :board: ek_ra8m1
30 :goals: build flash
31 :compact:
32
33The comparator's output controls LED0:
34
35 * If the comparator output is HIGH, LED0 turns on.
36 * If the comparator output is LOW, LED0 turns off.
37
38 Example case:
39
40 * Case 1: IVCMP3 connected to SW0 (Pull up)
41
42 * SW0 not pressed --> Comparator output HIGH --> LED0 on
43 * SW0 pressed --> Comparator output LOW --> LED0 off
44
45 * Case 2: IVCMP3 connected to another reference voltage
46
47 * IVCMP3 HIGH --> Comparator output HIGH --> LED0 on
48 * IVCMP3 LOW --> Comparator output LOW --> LED0 off
49
