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feat(MCPWM): Add mcpwm carrier clk source

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The MCPWM carrier is part of the operator and can work independently
without the MCPWM timer being enabled. This commit add the MCPWM
carrier clk source.
This commit is contained in:
Chen Jichang
2023-08-14 14:10:50 +08:00
parent 080087a9a0
commit 97d5db32ae
17 changed files with 124 additions and 35 deletions
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docs/en/api-reference/peripherals/mcpwm.rst
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@@ -724,6 +724,7 @@ The MCPWM operator has a carrier submodule that can be used if galvanic isolatio
To configure the carrier submodule, you can call :cpp:func:`mcpwm_operator_apply_carrier`, and provide configuration structure :cpp:type:`mcpwm_carrier_config_t`:
- :cpp:member:`mcpwm_carrier_config_t::clk_src` sets the clock source of the carrier.
- :cpp:member:`mcpwm_carrier_config_t::frequency_hz` indicates carrier frequency in Hz.
- :cpp:member:`mcpwm_carrier_config_t::duty_cycle` indicates the duty cycle of the carrier. Note that, the supported choices of the duty cycle are discrete, the driver will search for the nearest one based on your configuration.
- :cpp:member:`mcpwm_carrier_config_t::first_pulse_duration_us` indicates the duration of the first pulse in microseconds. The resolution of the first pulse duration is determined by the carrier frequency you set in the :cpp:member:`mcpwm_carrier_config_t::frequency_hz`. The first pulse duration can't be zero, and it has to be at least one period of the carrier. A longer pulse width can help conduct the inductance quicker.