95 lines
4.5 KiB
C
95 lines
4.5 KiB
C
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/* 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 _MB_CONTROLLER_SLAVE_H
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#define _MB_CONTROLLER_SLAVE_H
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#include "driver/uart.h" // for uart defines
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#include "errno.h" // for errno
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#include "esp_log.h" // for log write
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#include "string.h" // for strerror()
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#include "esp_modbus_slave.h" // for public type defines
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#include "esp_modbus_callbacks.h" // for callback functions
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/* ----------------------- Defines ------------------------------------------*/
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#define MB_INST_MIN_SIZE (2) // The minimal size of Modbus registers area in bytes
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#define MB_INST_MAX_SIZE (65535 * 2) // The maximum size of Modbus area in bytes
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#define MB_CONTROLLER_NOTIFY_QUEUE_SIZE (CONFIG_MB_CONTROLLER_NOTIFY_QUEUE_SIZE) // Number of messages in parameter notification queue
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#define MB_CONTROLLER_NOTIFY_TIMEOUT (pdMS_TO_TICKS(CONFIG_MB_CONTROLLER_NOTIFY_TIMEOUT)) // notification timeout
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#define MB_SLAVE_TAG "MB_CONTROLLER_SLAVE"
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#define MB_SLAVE_CHECK(a, ret_val, str, ...) \
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if (!(a)) { \
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ESP_LOGE(MB_SLAVE_TAG, "%s(%u): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
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return (ret_val); \
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}
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#define MB_SLAVE_ASSERT(con) do { \
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if (!(con)) { ESP_LOGE(MB_SLAVE_TAG, "assert errno:%d, errno_str: !(%s)", errno, strerror(errno)); assert(0 && #con); } \
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} while (0)
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/**
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* @brief Device communication parameters for master
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*/
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typedef struct {
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mb_mode_type_t mode; /*!< Modbus communication mode */
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uint8_t slave_addr; /*!< Slave address field */
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uart_port_t port; /*!< Modbus communication port (UART) number */
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uint32_t baudrate; /*!< Modbus baudrate */
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uart_parity_t parity; /*!< Modbus UART parity settings */
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} mb_slave_comm_info_t;
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/**
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* @brief Modbus controller handler structure
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*/
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typedef struct {
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mb_port_type_t port_type; /*!< port type */
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mb_communication_info_t mbs_comm; /*!< communication info */
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TaskHandle_t mbs_task_handle; /*!< task handle */
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EventGroupHandle_t mbs_event_group; /*!< controller event group */
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QueueHandle_t mbs_notification_queue_handle; /*!< controller notification queue */
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mb_register_area_descriptor_t mbs_area_descriptors[MB_PARAM_COUNT]; /*!< register area descriptors */
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} mb_slave_options_t;
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typedef mb_event_group_t (*iface_check_event)(mb_event_group_t); /*!< Interface method check_event */
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typedef esp_err_t (*iface_get_param_info)(mb_param_info_t*, uint32_t); /*!< Interface method get_param_info */
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typedef esp_err_t (*iface_set_descriptor)(mb_register_area_descriptor_t); /*!< Interface method set_descriptor */
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/**
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* @brief Request mode for parameter to use in data dictionary
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*/
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typedef struct
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{
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mb_slave_options_t opts; /*!< Modbus slave options */
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// Functional pointers to internal static functions of the implementation (public interface methods)
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iface_init init; /*!< Interface method init */
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iface_destroy destroy; /*!< Interface method destroy */
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iface_setup setup; /*!< Interface method setup */
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iface_start start; /*!< Interface method start */
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iface_check_event check_event; /*!< Interface method check_event */
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iface_get_param_info get_param_info; /*!< Interface method get_param_info */
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iface_set_descriptor set_descriptor; /*!< Interface method set_descriptor */
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// Modbus register calback function pointers
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reg_discrete_cb slave_reg_cb_discrete; /*!< Stack callback discrete rw method */
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reg_input_cb slave_reg_cb_input; /*!< Stack callback input rw method */
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reg_holding_cb slave_reg_cb_holding; /*!< Stack callback holding rw method */
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reg_coils_cb slave_reg_cb_coils; /*!< Stack callback coils rw method */
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} mb_slave_interface_t;
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#endif
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