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[frame="topbot",grid="none"]
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[frame="topbot",grid="none"]
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|=======================
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|=======================
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| Hardware source file(s): | neorv32_pwm.vhd |
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| Hardware source file(s): | neorv32_pwm.vhd |
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| Software driver file(s): | neorv32_pwm.c |
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| Software driver file(s): | neorv32_pwm.c |
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| | neorv32_pwm.h |
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| | neorv32_pwm.h |
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| Top entity port: | `pwm_o` | up to 60 PWM output channels (1-bit per channel)
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| Top entity port: | `pwm_o` | up to 60 PWM output channels (60-bit, fixed)
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| Configuration generics: | _IO_PWM_NUM_CH_ | number of PWM channels to implement (0..60)
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| Configuration generics: | _IO_PWM_NUM_CH_ | number of PWM channels to implement (0..60)
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| CPU interrupts: | none |
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| CPU interrupts: | none |
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|=======================
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|=======================
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The PWM controller implements a pulse-width modulation controller with up to 60 independent channels and 8-
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The PWM controller implements a pulse-width modulation controller with up to 60 independent channels and 8-
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bit resolution per channel. The actual number of implemented channels is defined by the _IO_PWM_NUM_CH_ generic.
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bit resolution per channel. The actual number of implemented channels is defined by the _IO_PWM_NUM_CH_ generic.
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Setting this generic to zero will completely remove the PWM controller from the design.
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Setting this generic to zero will completely remove the PWM controller from the design.
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[NOTE]
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The `pwm_o` has a static size of 60-bit. Is less than 60 PWM channels are configured, only the LSB-aligned channels
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(bits) are used while the remaining bits are hardwired to zero.
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The PWM controller is based on an 8-bit base counter with a programmable threshold comparators for each channel
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The PWM controller is based on an 8-bit base counter with a programmable threshold comparators for each channel
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that defines the actual duty cycle. The controller can be used to drive fancy RGB-LEDs with 24-
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that defines the actual duty cycle. The controller can be used to drive fancy RGB-LEDs with 24-
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bit true color, to dim LCD back-lights or even for "analog" control. An external integrator (RC low-pass filter)
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bit true color, to dim LCD back-lights or even for "analog" control. An external integrator (RC low-pass filter)
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can be used to smooth the generated "analog" signals.
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can be used to smooth the generated "analog" signals.
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