refactor(mcpwm): refactor gpio mode config in mcpwm

Deprecate io_loop_back flag. Use capture timer to test generator and
dead time.

docs/en/api-reference/peripherals/mcpwm.rst

@@ -122,8 +122,6 @@ You can allocate a MCPWM generator object by calling the :cpp:func:`mcpwm_new_ge
 
 - :cpp:member:`mcpwm_generator_config_t::gen_gpio_num` sets the GPIO number used by the generator.
 - :cpp:member:`mcpwm_generator_config_t::invert_pwm` sets whether to invert the PWM signal.
-- :cpp:member:`mcpwm_generator_config_t::io_loop_back` sets whether to enable the Loop-back mode. It is for debugging purposes only. It enables both the GPIO's input and output ability through the GPIO matrix peripheral.
-- :cpp:member:`mcpwm_generator_config_t::io_od_mode` configures the PWM GPIO as open-drain output.
 - :cpp:member:`mcpwm_generator_config_t::pull_up` and :cpp:member:`mcpwm_generator_config_t::pull_down` controls whether to enable the internal pull-up and pull-down resistors accordingly.
 
 The :cpp:func:`mcpwm_new_generator` will return a pointer to the allocated generator object if the allocation succeeds. Otherwise, it will return an error code. Specifically, when there are no more free generators in the MCPWM operator, this function will return the :c:macro:`ESP_ERR_NOT_FOUND` error. [1]_
@@ -142,7 +140,6 @@ To allocate a GPIO fault object, you can call the :cpp:func:`mcpwm_new_gpio_faul
 - :cpp:member:`mcpwm_gpio_fault_config_t::gpio_num` sets the GPIO number used by the fault.
 - :cpp:member:`mcpwm_gpio_fault_config_t::active_level` sets the active level of the fault signal.
 - :cpp:member:`mcpwm_gpio_fault_config_t::pull_up` and :cpp:member:`mcpwm_gpio_fault_config_t::pull_down` set whether to pull up and/or pull down the GPIO internally.
-- :cpp:member:`mcpwm_gpio_fault_config_t::io_loop_back` sets whether to enable the loopback mode. It is for debugging purposes only. It enables both the GPIO's input and output ability through the GPIO matrix peripheral.
 
 The :cpp:func:`mcpwm_new_gpio_fault` will return a pointer to the allocated fault object if the allocation succeeds. Otherwise, it will return an error code. Specifically, when there are no more free GPIO faults in the MCPWM group, this function will return the :c:macro:`ESP_ERR_NOT_FOUND` error. [1]_
 
@@ -163,7 +160,6 @@ To allocate a GPIO sync source, you can call the :cpp:func:`mcpwm_new_gpio_sync_
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::gpio_num` sets the GPIO number used by the sync source.
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::active_neg` sets whether the sync signal is active on falling edges.
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::pull_up` and :cpp:member:`mcpwm_gpio_sync_src_config_t::pull_down` set whether to pull up and/or pull down the GPIO internally.
-- :cpp:member:`mcpwm_gpio_sync_src_config_t::io_loop_back` sets whether to enable the Loop-back mode. It is for debugging purposes only. It enables both the GPIO's input and output ability through the GPIO matrix peripheral.
 
 The :cpp:func:`mcpwm_new_gpio_sync_src` will return a pointer to the allocated sync source object if the allocation succeeds. Otherwise, it will return an error code. Specifically, when there are no more free GPIO sync sources in the MCPWM group, this function will return the :c:macro:`ESP_ERR_NOT_FOUND` error. [1]_
 
@@ -207,8 +203,6 @@ Next, to allocate a capture channel, you can call the :cpp:func:`mcpwm_new_captu
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pos_edge` and :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::neg_edge` set whether to capture on the positive and/or falling edge of the input signal.
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pull_up` and :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pull_down` set whether to pull up and/or pull down the GPIO internally.
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::invert_cap_signal` sets whether to invert the capture signal.
-- :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::io_loop_back` sets whether to enable the Loop-back mode. It is for debugging purposes only. It enables both the GPIO's input and output ability through the GPIO matrix peripheral.
-- :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::keep_io_conf_at_exit` sets whether to keep the GPIO configuration when the capture channel is deleted.
 
 The :cpp:func:`mcpwm_new_capture_channel` will return a pointer to the allocated capture channel object if the allocation succeeds. Otherwise, it will return an error code. Specifically, when there is no free capture channel left in the capture timer, this function will return the :c:macro:`ESP_ERR_NOT_FOUND` error.
 

docs/zh_CN/api-reference/peripherals/mcpwm.rst

@@ -122,8 +122,6 @@ MCPWM 生成器
 
 - :cpp:member:`mcpwm_generator_config_t::gen_gpio_num` 设置生成器使用的 GPIO 编号。
 - :cpp:member:`mcpwm_generator_config_t::invert_pwm` 设置是否反相 PWM 信号。
-- :cpp:member:`mcpwm_generator_config_t::io_loop_back` 设置是否启用回环模式。该模式仅用于调试，使用 GPIO 交换矩阵外设同时启用 GPIO 输入和输出。
-- :cpp:member:`mcpwm_generator_config_t::io_od_mode` 设置是否启用漏极开路输出。
 - :cpp:member:`mcpwm_generator_config_t::pull_up` 和 :cpp:member:`mcpwm_generator_config_t::pull_down` 用来设置是否启用内部上下拉电阻。
 
 分配成功后，:cpp:func:`mcpwm_new_generator` 将返回一个指向已分配生成器的指针。否则，函数将返回错误代码。具体来说，当 MCPWM 操作器中没有空闲生成器时，将返回 :c:macro:`ESP_ERR_NOT_FOUND` 错误。[1]_
@@ -142,7 +140,6 @@ MCPWM 故障分为两种类型：来自 GPIO 的故障信号和软件故障。
 - :cpp:member:`mcpwm_gpio_fault_config_t::gpio_num` 设置故障所使用的 GPIO 编号。
 - :cpp:member:`mcpwm_gpio_fault_config_t::active_level` 设置故障信号的有效电平。
 - :cpp:member:`mcpwm_gpio_fault_config_t::pull_up` 和 :cpp:member:`mcpwm_gpio_fault_config_t::pull_down` 设置是否在内部拉高和/或拉低 GPIO。
-- :cpp:member:`mcpwm_gpio_fault_config_t::io_loop_back` 设置是否启用回环模式。该模式仅用于调试，使用 GPIO 交换矩阵外设同时启用 GPIO 输入和输出。
 
 分配成功后，:cpp:func:`mcpwm_new_gpio_fault` 将返回一个指向已分配故障的指针。否则，函数将返回错误代码。具体来说，当指定 MCPWM 组中没有空闲 GPIO 故障时，将返回 :c:macro:`ESP_ERR_NOT_FOUND` 错误。[1]_
 
@@ -163,7 +160,6 @@ MCPWM 同步源
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::gpio_num` 设置同步源使用的 GPIO 编号。
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::active_neg` 设置同步信号在下降沿是否有效。
 - :cpp:member:`mcpwm_gpio_sync_src_config_t::pull_up` 和 :cpp:member:`mcpwm_gpio_sync_src_config_t::pull_down` 设置是否在内部拉高和/或拉低 GPIO。
-- :cpp:member:`mcpwm_gpio_sync_src_config_t::io_loop_back` 设置是否启用回环模式。该模式仅用于调试，使用 GPIO 交换矩阵外设同时启用 GPIO 输入和输出。
 
 分配成功后，:cpp:func:`mcpwm_new_gpio_sync_src` 将返回一个指向已分配同步源的指针。否则，函数将返回错误代码。具体来说，当 MCPWM 组中没有空闲 GPIO 时钟源时，将返回 :c:macro:`ESP_ERR_NOT_FOUND` 错误。[1]_
 
@@ -207,8 +203,6 @@ MCPWM 组有一个专用定时器，用于捕获特定事件发生时的时间
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pos_edge` 和 :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::neg_edge` 设置是否在输入信号的上升沿和/或下降沿捕获时间戳。
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pull_up` 和 :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::pull_down` 设置是否在内部拉高和/或拉低 GPIO。
 - :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::invert_cap_signal` 设置是否取反捕获信号。
-- :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::io_loop_back` 设置是否启用回环模式。该模式仅用于调试，使用 GPIO 交换矩阵外设同时启用 GPIO 输入和输出。
-- :cpp:member:`mcpwm_capture_channel_config_t::extra_capture_channel_flags::keep_io_conf_at_exit` 设置是否在删除通道时保留 GPIO 的相关配置。
 
 分配成功后，:cpp:func:`mcpwm_new_capture_channel` 将返回一个指向已分配捕获通道的指针。否则，函数将返回错误代码。具体来说，当捕获定时器中没有空闲捕获通道时，将返回 :c:macro:`ESP_ERR_NOT_FOUND` 错误。