1 // Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include "soc/soc_caps.h" 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 23 /** 24 * @brief SIGMADELTA port number, the max port number is (SIGMADELTA_NUM_MAX -1). 25 */ 26 typedef enum { 27 SIGMADELTA_PORT_0, /*!< SIGMADELTA port 0 */ 28 SIGMADELTA_PORT_MAX, /*!< SIGMADELTA port max */ 29 } sigmadelta_port_t; 30 31 _Static_assert(SIGMADELTA_PORT_MAX == SOC_SIGMADELTA_NUM, "Sigma-delta port num incorrect."); 32 33 /** 34 * @brief Sigma-delta channel list 35 */ 36 typedef enum { 37 SIGMADELTA_CHANNEL_0, /*!< Sigma-delta channel 0 */ 38 SIGMADELTA_CHANNEL_1, /*!< Sigma-delta channel 1 */ 39 SIGMADELTA_CHANNEL_2, /*!< Sigma-delta channel 2 */ 40 SIGMADELTA_CHANNEL_3, /*!< Sigma-delta channel 3 */ 41 #if SOC_SIGMADELTA_CHANNEL_NUM > 4 42 SIGMADELTA_CHANNEL_4, /*!< Sigma-delta channel 4 */ 43 SIGMADELTA_CHANNEL_5, /*!< Sigma-delta channel 5 */ 44 SIGMADELTA_CHANNEL_6, /*!< Sigma-delta channel 6 */ 45 SIGMADELTA_CHANNEL_7, /*!< Sigma-delta channel 7 */ 46 #endif 47 SIGMADELTA_CHANNEL_MAX, /*!< Sigma-delta channel max */ 48 } sigmadelta_channel_t; 49 50 /** 51 * @brief Sigma-delta configure struct 52 */ 53 typedef struct { 54 sigmadelta_channel_t channel; /*!< Sigma-delta channel number */ 55 int8_t sigmadelta_duty; /*!< Sigma-delta duty, duty ranges from -128 to 127. */ 56 uint8_t sigmadelta_prescale; /*!< Sigma-delta prescale, prescale ranges from 0 to 255. */ 57 uint8_t sigmadelta_gpio; /*!< Sigma-delta output io number, refer to gpio.h for more details. */ 58 } sigmadelta_config_t; 59 60 #ifdef __cplusplus 61 } 62 #endif 63
