2023-10-23 19:21:37 +02:00
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===========================
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2023-10-21 12:24:43 +02:00
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``pwm`` General PWM Example
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===========================
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A test of a PWM device driver. It simply enables a pulsed output for a specified
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frequency and duty for a specified period of time. This example can ONLY be
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built as an NSH built-in function.
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This test depends on these specific PWM/NSH configurations settings (your
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specific PWM settings might require additional settings).
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- ``CONFIG_PWM`` – Enables PWM support.
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- ``CONFIG_PWM_PULSECOUNT`` – Enables PWM pulse count support (if the hardware
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supports it).
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- ``CONFIG_NSH_BUILTIN_APPS`` – Build the PWM test as an NSH built-in function.
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Specific configuration options for this example include:
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- ``CONFIG_EXAMPLES_PWM_DEVPATH`` – The path to the default PWM device. Default:
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``/dev/pwm0``.
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- ``CONFIG_EXAMPLES_PWM_FREQUENCY`` – The initial PWM frequency. Default: ``100`` Hz
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- ``CONFIG_EXAMPLES_PWM_DUTYPCT`` – The initial PWM duty as a percentage. Default:
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``50%``.
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- ``CONFIG_EXAMPLES_PWM_DURATION`` – The initial PWM pulse train duration in
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seconds. Used only if the current pulse count is zero (pulse count is only
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supported if ``CONFIG_PWM_PULSECOUNT`` is defined). Default: ``5`` seconds.
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- ``CONFIG_EXAMPLES_PWM_PULSECOUNT`` – The initial PWM pulse count. This option is
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only available if ``CONFIG_PWM_PULSECOUNT`` is non-zero. Default: ``0`` (i.e., use
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the duration, not the count).
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