esp-idf/components/freemodbus/common/mbc_master.h

114 lines
5.5 KiB
C

/* Copyright 2018 Espressif Systems (Shanghai) PTE LTD
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _MB_CONTROLLER_MASTER_H
#define _MB_CONTROLLER_MASTER_H
#include <sys/queue.h> // for list
#include "freertos/FreeRTOS.h" // for task creation and queue access
#include "freertos/task.h" // for task api access
#include "freertos/event_groups.h" // for event groups
#include "driver/uart.h" // for UART types
#include "errno.h" // for errno
#include "esp_log.h" // for log write
#include "string.h" // for strerror()
#include "esp_modbus_common.h" // for common types
#include "esp_modbus_master.h" // for public master types
#include "esp_modbus_callbacks.h"
/* ----------------------- Defines ------------------------------------------*/
/**
* @brief Request mode for parameter to use in data dictionary
*/
typedef enum {
MB_PARAM_READ, /*!< Read parameter values. */
MB_PARAM_WRITE /*!< Write parameter values. */
} mb_param_mode_t;
/**
* @brief Device communication parameters for master
*/
typedef struct {
mb_mode_type_t mode; /*!< Modbus communication mode */
uint8_t dummy; /*!< Dummy field */
uart_port_t port; /*!< Modbus communication port (UART) number */
uint32_t baudrate; /*!< Modbus baudrate */
uart_parity_t parity; /*!< Modbus UART parity settings */
} mb_master_comm_info_t;
#if MB_MASTER_TCP_ENABLED
/**
* @brief Modbus slave addr list item for the master
*/
typedef struct mb_slave_addr_entry_s{
uint16_t index; /*!< Index of the slave address */
const char* ip_address; /*!< IP address string of the slave */
uint8_t slave_addr; /*!< Short slave address */
void* p_data; /*!< pointer to data structure */
LIST_ENTRY(mb_slave_addr_entry_s) entries; /*!< The slave address entry */
} mb_slave_addr_entry_t;
#endif
/**
* @brief Modbus controller handler structure
*/
typedef struct {
mb_port_type_t port_type; /*!< Modbus port type */
mb_communication_info_t mbm_comm; /*!< Modbus communication info */
uint8_t* mbm_reg_buffer_ptr; /*!< Modbus data buffer pointer */
uint16_t mbm_reg_buffer_size; /*!< Modbus data buffer size */
TaskHandle_t mbm_task_handle; /*!< Modbus task handle */
EventGroupHandle_t mbm_event_group; /*!< Modbus controller event group */
const mb_parameter_descriptor_t* mbm_param_descriptor_table; /*!< Modbus controller parameter description table */
size_t mbm_param_descriptor_size; /*!< Modbus controller parameter description table size*/
#if MB_MASTER_TCP_ENABLED
LIST_HEAD(mbm_slave_addr_info_, mb_slave_addr_entry_s) mbm_slave_list; /*!< Slave address information list */
uint16_t mbm_slave_list_count;
#endif
} mb_master_options_t;
typedef esp_err_t (*iface_get_cid_info)(uint16_t, const mb_parameter_descriptor_t**); /*!< Interface get_cid_info method */
typedef esp_err_t (*iface_get_parameter)(uint16_t, char*, uint8_t*, uint8_t*); /*!< Interface get_parameter method */
typedef esp_err_t (*iface_send_request)(mb_param_request_t*, void*); /*!< Interface send_request method */
typedef esp_err_t (*iface_set_descriptor)(const mb_parameter_descriptor_t*, const uint16_t); /*!< Interface set_descriptor method */
typedef esp_err_t (*iface_set_parameter)(uint16_t, char*, uint8_t*, uint8_t*); /*!< Interface set_parameter method */
/**
* @brief Modbus controller interface structure
*/
typedef struct {
// Master object interface options
mb_master_options_t opts;
// Public interface methods
iface_init init; /*!< Interface method init */
iface_destroy destroy; /*!< Interface method destroy */
iface_setup setup; /*!< Interface method setup */
iface_start start; /*!< Interface method start */
iface_get_cid_info get_cid_info; /*!< Interface get_cid_info method */
iface_get_parameter get_parameter; /*!< Interface get_parameter method */
iface_send_request send_request; /*!< Interface send_request method */
iface_set_descriptor set_descriptor; /*!< Interface set_descriptor method */
iface_set_parameter set_parameter; /*!< Interface set_parameter method */
// Modbus register calback function pointers
reg_discrete_cb master_reg_cb_discrete; /*!< Stack callback discrete rw method */
reg_input_cb master_reg_cb_input; /*!< Stack callback input rw method */
reg_holding_cb master_reg_cb_holding; /*!< Stack callback holding rw method */
reg_coils_cb master_reg_cb_coils; /*!< Stack callback coils rw method */
} mb_master_interface_t;
#endif //_MB_CONTROLLER_MASTER_H