wehub-resource-sync
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2022-2026 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 <stdint.h>
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#include <string.h>
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#include "stdatomic.h"
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#include "freertos/FreeRTOS.h"
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#include "hal/dac_periph.h"
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#include "hal/dac_types.h"
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#include "hal/dac_ll.h"
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#include "esp_private/gpio.h"
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#include "esp_check.h"
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#include "dac_priv_common.h"
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typedef enum {
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DAC_CHAN_FSM_IDLE,
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DAC_CHAN_FSM_REGISTERED,
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DAC_CHAN_FSM_ENABLED,
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DAC_CHAN_FSM_WAIT, // transition state
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} dac_channel_fsm_t;
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static _Atomic dac_channel_fsm_t s_dac_chan_fsm[SOC_DAC_CHAN_NUM] = {
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[0 ... SOC_DAC_CHAN_NUM - 1] = DAC_CHAN_FSM_IDLE,
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};
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static const char *TAG = "dac_common";
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esp_err_t dac_priv_register_channel(dac_channel_t chan_id)
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{
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ESP_RETURN_ON_FALSE(IS_VALID_DAC_CHANNEL(chan_id), ESP_ERR_INVALID_ARG, TAG, "channel id is invalid");
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dac_channel_fsm_t expected_fsm = DAC_CHAN_FSM_IDLE;
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if (atomic_compare_exchange_strong(&s_dac_chan_fsm[chan_id], &expected_fsm, DAC_CHAN_FSM_REGISTERED)) {
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return ESP_OK;
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} else {
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ESP_LOGE(TAG, "dac channel %d has been registered", chan_id);
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return ESP_ERR_INVALID_STATE;
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}
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}
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esp_err_t dac_priv_deregister_channel(dac_channel_t chan_id)
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{
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ESP_RETURN_ON_FALSE(IS_VALID_DAC_CHANNEL(chan_id), ESP_ERR_INVALID_ARG, TAG, "channel id is invalid");
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dac_channel_fsm_t expected_fsm = DAC_CHAN_FSM_REGISTERED;
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if (atomic_compare_exchange_strong(&s_dac_chan_fsm[chan_id], &expected_fsm, DAC_CHAN_FSM_IDLE)) {
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return ESP_OK;
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} else {
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ESP_LOGE(TAG, "dac channel %d is still enabled or not registered", chan_id);
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return ESP_ERR_INVALID_STATE;
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}
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}
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esp_err_t dac_priv_enable_channel(dac_channel_t chan_id)
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{
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ESP_RETURN_ON_FALSE(IS_VALID_DAC_CHANNEL(chan_id), ESP_ERR_INVALID_ARG, TAG, "channel id is invalid");
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dac_channel_fsm_t expected_fsm = DAC_CHAN_FSM_REGISTERED;
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if (atomic_compare_exchange_strong(&s_dac_chan_fsm[chan_id], &expected_fsm, DAC_CHAN_FSM_WAIT)) {
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gpio_num_t gpio_num = (gpio_num_t)dac_periph_signal.dac_channel_io_num[chan_id];
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gpio_config_as_analog(gpio_num);
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DAC_RTC_ENTER_CRITICAL();
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dac_ll_power_on(chan_id);
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dac_ll_rtc_sync_by_adc(false);
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DAC_RTC_EXIT_CRITICAL();
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atomic_store(&s_dac_chan_fsm[chan_id], DAC_CHAN_FSM_ENABLED);
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return ESP_OK;
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} else {
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ESP_LOGE(TAG, "dac channel %d is already enabled or not registered", chan_id);
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return ESP_ERR_INVALID_STATE;
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}
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}
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esp_err_t dac_priv_disable_channel(dac_channel_t chan_id)
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{
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ESP_RETURN_ON_FALSE(IS_VALID_DAC_CHANNEL(chan_id), ESP_ERR_INVALID_ARG, TAG, "channel id is invalid");
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dac_channel_fsm_t expected_fsm = DAC_CHAN_FSM_ENABLED;
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if (atomic_compare_exchange_strong(&s_dac_chan_fsm[chan_id], &expected_fsm, DAC_CHAN_FSM_WAIT)) {
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DAC_RTC_ENTER_CRITICAL();
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dac_ll_power_down(chan_id);
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DAC_RTC_EXIT_CRITICAL();
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atomic_store(&s_dac_chan_fsm[chan_id], DAC_CHAN_FSM_REGISTERED);
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return ESP_OK;
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} else {
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ESP_LOGE(TAG, "dac channel %d is not enabled", chan_id);
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return ESP_ERR_INVALID_STATE;
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}
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}
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