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Header: #include <applibs/pwm.h>
Opens a PWM controller, and returns a file descriptor to use for subsequent calls.
int PWM_Open(PWM_ControllerId pwm);
Parameters
pwmThe zero-based index of the PWM controller to access. The maximum value permitted depends on the platform.
Errors
Returns -1 if an error is encountered and sets errno to the error value.
- EACCES: access to the PWM interface is not permitted because the
pwmparameter is not listed in the Pwm field of the application manifest.
Return value
Returns the file descriptor for the PWM controller if it was opened successfully, or -1 for failure, in which case errno is set to the error value.
Application manifest requirements
To access a PWM controller, your application must identify it in the Pwm field of the application manifest.