187 lines
6.7 KiB
C
187 lines
6.7 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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//
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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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// mbcontroller.h
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// Implementation of the MbController
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#ifndef _MODBUS_CONTROLLER
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#define _MODBUS_CONTROLLER
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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 "sdkconfig.h" // for KConfig options
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#include "driver/uart.h" // for uart port number defines
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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_STACK_SIZE (CONFIG_MB_CONTROLLER_STACK_SIZE) // Stack size for Modbus controller
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#define MB_CONTROLLER_PRIORITY (CONFIG_MB_SERIAL_TASK_PRIO - 1) // priority of MB controller task
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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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// Default port defines
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#define MB_DEVICE_ADDRESS (1) // Default slave device address in Modbus
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#define MB_DEVICE_SPEED (115200) // Default Modbus speed for now hard defined
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#define MB_UART_PORT (UART_NUM_2) // Default UART port number
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#define MB_PAR_INFO_TOUT (10) // Timeout for get parameter info
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#define MB_PARITY_NONE (UART_PARITY_DISABLE)
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/**
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* @brief Event group for parameters notification
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*/
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typedef enum
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{
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MB_EVENT_NO_EVENTS = 0x00,
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MB_EVENT_HOLDING_REG_WR = BIT0, /*!< Modbus Event Write Holding registers. */
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MB_EVENT_HOLDING_REG_RD = BIT1, /*!< Modbus Event Read Holding registers. */
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MB_EVENT_INPUT_REG_RD = BIT3, /*!< Modbus Event Read Input registers. */
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MB_EVENT_COILS_WR = BIT4, /*!< Modbus Event Write Coils. */
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MB_EVENT_COILS_RD = BIT5, /*!< Modbus Event Read Coils. */
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MB_EVENT_DISCRETE_RD = BIT6, /*!< Modbus Event Read Discrete bits. */
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MB_EVENT_STACK_STARTED = BIT7 /*!< Modbus Event Stack started */
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} mb_event_group_t;
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/**
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* @brief Type of Modbus parameter
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*/
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typedef enum
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{
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MB_PARAM_HOLDING, /*!< Modbus Holding register. */
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MB_PARAM_INPUT, /*!< Modbus Input register. */
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MB_PARAM_COIL, /*!< Modbus Coils. */
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MB_PARAM_DISCRETE, /*!< Modbus Discrete bits. */
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MB_PARAM_COUNT,
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MB_PARAM_UNKNOWN = 0xFF
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} mb_param_type_t;
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/*!
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* \brief Modbus serial transmission modes (RTU/ASCII).
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*/
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typedef enum
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{
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MB_MODE_RTU, /*!< RTU transmission mode. */
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MB_MODE_ASCII, /*!< ASCII transmission mode. */
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MB_MODE_TCP /*!< TCP mode. */
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} mb_mode_type_t;
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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 Device communication parameters
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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; /*!< Modbus Slave Address */
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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_communication_info_t;
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/**
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* @brief Initialize 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_FAIL Parameter error
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*/
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esp_err_t mbcontroller_init(void);
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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_FAIL Parameter error
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*/
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esp_err_t mbcontroller_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 mbcontroller_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 mbcontroller_setup(mb_communication_info_t 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 mbcontroller_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 mbcontroller_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 mbcontroller_set_descriptor(mb_register_area_descriptor_t descr_data);
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#endif
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