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152 lines
4.7 KiB
C
152 lines
4.7 KiB
C
/* Copyright 2018 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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*/
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#ifndef _ESP_MB_SLAVE_INTERFACE_H
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#define _ESP_MB_SLAVE_INTERFACE_H
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// Public interface header for slave
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#include <stdint.h> // for standard int types definition
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#include <stddef.h> // for NULL and std defines
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#include "soc/soc.h" // for BITN definitions
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#include "freertos/FreeRTOS.h" // for task creation and queues access
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#include "freertos/event_groups.h" // for event groups
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#include "esp_modbus_common.h" // for common types
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Parameter access event information type
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*/
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typedef struct {
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uint32_t time_stamp; /*!< Timestamp of Modbus Event (uS)*/
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uint16_t mb_offset; /*!< Modbus register offset */
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mb_event_group_t type; /*!< Modbus event type */
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uint8_t* address; /*!< Modbus data storage address */
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size_t size; /*!< Modbus event register size (number of registers)*/
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} mb_param_info_t;
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/**
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* @brief Parameter storage area descriptor
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*/
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typedef struct {
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uint16_t start_offset; /*!< Modbus start address for area descriptor */
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mb_param_type_t type; /*!< Type of storage area descriptor */
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void* address; /*!< Instance address for storage area descriptor */
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size_t size; /*!< Instance size for area descriptor (bytes) */
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} mb_register_area_descriptor_t;
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/**
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* @brief Initialize Modbus Slave controller and stack for TCP port
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*
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* @param[out] handler handler(pointer) to master data structure
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* @return
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* - ESP_OK Success
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* - ESP_ERR_NO_MEM Parameter error
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* - ESP_ERR_NOT_SUPPORTED Port type not supported
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* - ESP_ERR_INVALID_STATE Initialization failure
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*/
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esp_err_t mbc_slave_init_tcp(void** handler);
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/**
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* @brief Initialize Modbus Slave controller and stack for Serial port
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*
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* @param[out] handler handler(pointer) to master data structure
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* @param[in] port_type the type of port
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* @return
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* - ESP_OK Success
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* - ESP_ERR_NO_MEM Parameter error
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* - ESP_ERR_NOT_SUPPORTED Port type not supported
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* - ESP_ERR_INVALID_STATE Initialization failure
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*/
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esp_err_t mbc_slave_init(mb_port_type_t port_type, void** handler);
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/**
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* @brief Initialize Modbus Slave controller interface handle
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*
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* @param[in] handler - pointer to slave interface data structure
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*/
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void mbc_slave_init_iface(void* handler);
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/**
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* @brief Destroy Modbus controller and stack
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Parameter error
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*/
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esp_err_t mbc_slave_destroy(void);
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/**
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* @brief Start Modbus communication stack
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Modbus stack start error
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*/
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esp_err_t mbc_slave_start(void);
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/**
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* @brief Set Modbus communication parameters for the controller
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*
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* @param comm_info Communication parameters structure.
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Incorrect parameter data
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*/
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esp_err_t mbc_slave_setup(void* comm_info);
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/**
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* @brief Wait for specific event on parameter change.
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*
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* @param group Group event bit mask to wait for change
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*
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* @return
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* - mb_event_group_t event bits triggered
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*/
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mb_event_group_t mbc_slave_check_event(mb_event_group_t group);
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/**
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* @brief Get parameter information
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*
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* @param[out] reg_info parameter info structure
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* @param timeout Timeout in milliseconds to read information from
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* parameter queue
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* @return
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* - ESP_OK Success
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* - ESP_ERR_TIMEOUT Can not get data from parameter queue
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* or queue overflow
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*/
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esp_err_t mbc_slave_get_param_info(mb_param_info_t* reg_info, uint32_t timeout);
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/**
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* @brief Set Modbus area descriptor
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*
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* @param descr_data Modbus registers area descriptor structure
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*
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* @return
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* - ESP_OK: The appropriate descriptor is set
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* - ESP_ERR_INVALID_ARG: The argument is incorrect
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*/
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esp_err_t mbc_slave_set_descriptor(mb_register_area_descriptor_t descr_data);
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#ifdef __cplusplus
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}
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#endif
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#endif
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