62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
// Copyright 2015-2016 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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// 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 "esp_log.h"
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#include "soc/soc.h"
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#include "driver/periph_ctrl.h"
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#include "driver/sigmadelta.h"
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static const char* SIGMADELTA_TAG = "SIGMADELTA";
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#define SIGMADELTA_CHANNEL_ERR_STR "SIGMADELTA CHANNEL ERROR"
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#define SIGMADELTA_IO_ERR_STR "SIGMADELTA GPIO NUM ERROR"
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#define SIGMADELTA_CHECK(a,str,ret_val) if(!(a)) { \
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ESP_LOGE(SIGMADELTA_TAG,"%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, str); \
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return (ret_val); \
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}
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esp_err_t sigmadelta_config(const sigmadelta_config_t *config)
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{
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SIGMADELTA_CHECK(config->channel < SIGMADELTA_CHANNEL_MAX, SIGMADELTA_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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SIGMADELTA_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(config->sigmadelta_gpio), SIGMADELTA_IO_ERR_STR, ESP_ERR_INVALID_ARG);
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sigmadelta_set_duty(config->channel, config->sigmadelta_duty);
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sigmadelta_set_prescale(config->channel, config->sigmadelta_prescale);
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sigmadelta_set_pin(config->channel, config->sigmadelta_gpio);
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return ESP_OK;
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}
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esp_err_t sigmadelta_set_duty(sigmadelta_channel_t channel, int8_t duty)
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{
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SIGMADELTA_CHECK(channel < SIGMADELTA_CHANNEL_MAX, SIGMADELTA_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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SIGMADELTA.channel[channel].duty = duty;
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return ESP_OK;
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}
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esp_err_t sigmadelta_set_prescale(sigmadelta_channel_t channel, uint8_t prescale)
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{
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SIGMADELTA_CHECK(channel < SIGMADELTA_CHANNEL_MAX, SIGMADELTA_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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SIGMADELTA.channel[channel].prescale = prescale;
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return ESP_OK;
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}
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esp_err_t sigmadelta_set_pin(sigmadelta_channel_t channel, gpio_num_t gpio_num)
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{
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SIGMADELTA_CHECK(channel < SIGMADELTA_CHANNEL_MAX, SIGMADELTA_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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SIGMADELTA_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), SIGMADELTA_IO_ERR_STR, ESP_ERR_INVALID_ARG);
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
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gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
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gpio_matrix_out(gpio_num, GPIO_SD0_OUT_IDX + channel, 0, 0);
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return ESP_OK;
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}
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