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138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "esp_log.h"
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#include "esp_err.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "freertos/timers.h"
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#include "driver/rtc_io.h"
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#include "driver/dac.h"
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#include "soc/dac_periph.h"
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#include "hal/dac_hal.h"
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extern portMUX_TYPE rtc_spinlock; //TODO: Will be placed in the appropriate position after the rtc module is finished.
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static const char *DAC_TAG = "DAC";
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#define DAC_CHECK(a, str, ret_val) ({ \
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if (!(a)) { \
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ESP_LOGE(DAC_TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str); \
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return (ret_val); \
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} \
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})
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/*---------------------------------------------------------------
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DAC
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---------------------------------------------------------------*/
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esp_err_t dac_pad_get_io_num(dac_channel_t channel, gpio_num_t *gpio_num)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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*gpio_num = (gpio_num_t)dac_periph_signal.dac_channel_io_num[channel];
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return ESP_OK;
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}
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static esp_err_t dac_rtc_pad_init(dac_channel_t channel)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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gpio_num_t gpio_num = 0;
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dac_pad_get_io_num(channel, &gpio_num);
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rtc_gpio_init(gpio_num);
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rtc_gpio_set_direction(gpio_num, RTC_GPIO_MODE_DISABLED);
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rtc_gpio_pullup_dis(gpio_num);
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rtc_gpio_pulldown_dis(gpio_num);
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return ESP_OK;
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}
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esp_err_t dac_output_enable(dac_channel_t channel)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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dac_rtc_pad_init(channel);
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_power_on(channel);
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dac_hal_rtc_sync_by_adc(false);
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_output_disable(dac_channel_t channel)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_power_down(channel);
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_output_voltage(dac_channel_t channel, uint8_t dac_value)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_update_output_value(channel, dac_value);
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value)
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{
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DAC_CHECK(channel < DAC_CHANNEL_MAX, "DAC channel error", ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_update_output_value(channel, dac_value);
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_cw_generator_enable(void)
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{
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_cw_generator_enable();
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_cw_generator_disable(void)
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{
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_cw_generator_disable();
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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esp_err_t dac_cw_generator_config(dac_cw_config_t *cw)
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{
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if (!cw) return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&rtc_spinlock);
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dac_hal_cw_generator_config(cw);
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portEXIT_CRITICAL(&rtc_spinlock);
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return ESP_OK;
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}
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