fdcavalcanti opened a new pull request, #17419:
URL: https://github.com/apache/nuttx/pull/17419
## Summary
- boards/risc-v/esp32c6: add capture example to capture defconfig
Add missing PWM capture example from the capture defconfig of
esp32c3-devkitc.
- arch/risc-v/espressif: add PWM capture getedges function
Create esp_capture_getedges function which was missing from the capture API.
- arch/xtensa/espressif: add PWM capture getedges function
Create esp_capture_getedges function which was missing from the capture API.
## Impact
- Impact on user: Yes, fixes a failure scenario when using the capture
example.
- Impact on build: No.
- Impact on hardware: ESP32|S2|S3|C3|C6|H2.
- Impact on documentation: No.
- Impact on security: No.
- Impact on compatibility: No.
## Testing
### Building
Build any capture defconfig from Espressif devices and execute the capture
example.
- ./tools/configure.sh esp32c6-devkitc:capture
- Make and flash
### Running
Run the cap example:
```
nsh> cap
```
### Results
PWM signal 50% duty cycle at 10 kHz for 5 seconds in connected to the
capture pin.
```
Before:
nsh> cap
cap_main: Hardware initialized. Opening the capture device: /dev/capture0
cap_main: Number of samples: 0
pwm duty cycle: 0 %
pwm frequence: 0 Hz
dump_assert_info: Current Version: NuttX 10.4.0 9e573371bb Nov 18 2025
08:54:38 xtensa
dump_assert_info: Assertion failed lower[i]->ops->getedges !=
((void*)0): at file: timers/capture.c:344 task: cap process: cap 0x420244f8
```
Now:
```
nsh> cap
cap_main: Hardware initialized. Opening the capture device: /dev/capture0
cap_main: Number of samples: 0
pwm duty cycle: 0 %
pwm frequence: 0 Hz
pwm edges counting: 0
pwm duty cycle: 50 %
pwm frequence: 10000 Hz
pwm edges counting: 553
pwm duty cycle: 50 %
pwm frequence: 10000 Hz
pwm edges counting: 1653
pwm duty cycle: 50 %
pwm frequence: 10000 Hz
pwm edges counting: 2753
pwm duty cycle: 50 %
...
pwm edges counting: 45527
pwm duty cycle: 50 %
pwm frequence: 9999 Hz
pwm edges counting: 46626
pwm duty cycle: 50 %
pwm frequence: 10000 Hz
pwm edges counting: 47725
pwm duty cycle: 50 %
```
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