kopia lustrzana https://github.com/espressif/esp-idf
117 wiersze
4.0 KiB
C
117 wiersze
4.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <sys/cdefs.h>
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#include "freertos/FreeRTOS.h"
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#include "esp_check.h"
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#include "esp_pm.h"
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#include "esp_private/glitch_filter_priv.h"
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#include "hal/gpio_ll.h"
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#include "esp_clk_tree.h"
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#include "esp_private/io_mux.h"
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static const char *TAG = "gpio-filter";
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/**
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* @brief Type of GPIO pin glitch filter
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*/
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typedef struct gpio_pin_glitch_filter_t {
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gpio_glitch_filter_t base;
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esp_pm_lock_handle_t pm_lock;
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#if CONFIG_PM_ENABLE
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char pm_lock_name[GLITCH_FILTER_PM_LOCK_NAME_LEN_MAX]; // pm lock name
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#endif
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} gpio_pin_glitch_filter_t;
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static esp_err_t gpio_filter_destroy(gpio_pin_glitch_filter_t *filter)
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{
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if (filter->pm_lock) {
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esp_pm_lock_delete(filter->pm_lock);
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}
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free(filter);
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return ESP_OK;
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}
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static esp_err_t gpio_pin_glitch_filter_del(gpio_glitch_filter_t *filter)
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{
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ESP_RETURN_ON_FALSE(filter->fsm == GLITCH_FILTER_FSM_INIT, ESP_ERR_INVALID_STATE, TAG, "filter not in init state");
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gpio_pin_glitch_filter_t *pin_filter = __containerof(filter, gpio_pin_glitch_filter_t, base);
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return gpio_filter_destroy(pin_filter);
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}
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static esp_err_t gpio_pin_glitch_filter_enable(gpio_glitch_filter_t *filter)
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{
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ESP_RETURN_ON_FALSE(filter->fsm == GLITCH_FILTER_FSM_INIT, ESP_ERR_INVALID_STATE, TAG, "filter not in init state");
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gpio_pin_glitch_filter_t *pin_filter = __containerof(filter, gpio_pin_glitch_filter_t, base);
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// acquire pm lock
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if (pin_filter->pm_lock) {
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esp_pm_lock_acquire(pin_filter->pm_lock);
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}
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gpio_ll_pin_filter_enable(NULL, filter->gpio_num);
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filter->fsm = GLITCH_FILTER_FSM_ENABLE;
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return ESP_OK;
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}
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static esp_err_t gpio_pin_glitch_filter_disable(gpio_glitch_filter_t *filter)
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{
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ESP_RETURN_ON_FALSE(filter->fsm == GLITCH_FILTER_FSM_ENABLE, ESP_ERR_INVALID_STATE, TAG, "filter not in enable state");
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gpio_pin_glitch_filter_t *pin_filter = __containerof(filter, gpio_pin_glitch_filter_t, base);
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gpio_ll_pin_filter_disable(NULL, filter->gpio_num);
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// release pm lock
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if (pin_filter->pm_lock) {
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esp_pm_lock_release(pin_filter->pm_lock);
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}
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filter->fsm = GLITCH_FILTER_FSM_INIT;
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return ESP_OK;
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}
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esp_err_t gpio_new_pin_glitch_filter(const gpio_pin_glitch_filter_config_t *config, gpio_glitch_filter_handle_t *ret_filter)
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{
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esp_err_t ret = ESP_OK;
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gpio_pin_glitch_filter_t *filter = NULL;
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ESP_GOTO_ON_FALSE(config && ret_filter, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
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ESP_GOTO_ON_FALSE(GPIO_IS_VALID_GPIO(config->gpio_num), ESP_ERR_INVALID_ARG, err, TAG, "invalid gpio number");
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filter = heap_caps_calloc(1, sizeof(gpio_pin_glitch_filter_t), FILTER_MEM_ALLOC_CAPS);
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ESP_GOTO_ON_FALSE(filter, ESP_ERR_NO_MEM, err, TAG, "no memory for pin glitch filter");
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// create pm lock according to different clock source
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#if CONFIG_PM_ENABLE
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esp_pm_lock_type_t lock_type = ESP_PM_NO_LIGHT_SLEEP;
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#if SOC_GPIO_FILTER_CLK_SUPPORT_APB
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if (config->clk_src == GLITCH_FILTER_CLK_SRC_APB) {
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lock_type = ESP_PM_APB_FREQ_MAX;
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}
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#endif // SOC_GPIO_FILTER_CLK_SUPPORT_APB
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sprintf(filter->pm_lock_name, "filter_io_%d", config->gpio_num); // e.g. filter_io_0
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ESP_GOTO_ON_ERROR(esp_pm_lock_create(lock_type, 0, filter->pm_lock_name, &filter->pm_lock),
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err, TAG, "create pm_lock failed");
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#endif // CONFIG_PM_ENABLE
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// Glitch filter's clock source is same to the IOMUX clock
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ESP_GOTO_ON_ERROR(io_mux_set_clock_source((soc_module_clk_t)(config->clk_src)), err, TAG, "set IO MUX clock source failed");
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filter->base.gpio_num = config->gpio_num;
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filter->base.fsm = GLITCH_FILTER_FSM_INIT;
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filter->base.del = gpio_pin_glitch_filter_del;
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filter->base.enable = gpio_pin_glitch_filter_enable;
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filter->base.disable = gpio_pin_glitch_filter_disable;
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*ret_filter = &(filter->base);
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return ESP_OK;
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err:
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if (filter) {
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gpio_filter_destroy(filter);
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}
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return ret;
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}
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