esp-idf/components/freemodbus/common/include/esp_modbus_common.h
2019-05-21 09:09:01 +02:00

139 lines
5.6 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_IFACE_COMMON_H
#define _MB_IFACE_COMMON_H
#include "driver/uart.h" // for UART types
#define MB_CONTROLLER_STACK_SIZE (CONFIG_FMB_CONTROLLER_STACK_SIZE) // Stack size for Modbus controller
#define MB_CONTROLLER_PRIORITY (CONFIG_FMB_SERIAL_TASK_PRIO - 1) // priority of MB controller task
// Default port defines
#define MB_DEVICE_ADDRESS (1) // Default slave device address in Modbus
#define MB_DEVICE_SPEED (115200) // Default Modbus speed for now hard defined
#define MB_UART_PORT (UART_NUM_2) // Default UART port number
#define MB_PAR_INFO_TOUT (10) // Timeout for get parameter info
#define MB_PARITY_NONE (UART_PARITY_DISABLE)
// The Macros below handle the endianness while transfer N byte data into buffer
#define _XFER_4_RD(dst, src) { \
*(uint8_t *)(dst)++ = *(uint8_t*)(src + 1); \
*(uint8_t *)(dst)++ = *(uint8_t*)(src + 0); \
*(uint8_t *)(dst)++ = *(uint8_t*)(src + 3); \
*(uint8_t *)(dst)++ = *(uint8_t*)(src + 2); \
(src) += 4; \
}
#define _XFER_2_RD(dst, src) { \
*(uint8_t *)(dst)++ = *(uint8_t *)(src + 1); \
*(uint8_t *)(dst)++ = *(uint8_t *)(src + 0); \
(src) += 2; \
}
#define _XFER_4_WR(dst, src) { \
*(uint8_t *)(dst + 1) = *(uint8_t *)(src)++; \
*(uint8_t *)(dst + 0) = *(uint8_t *)(src)++; \
*(uint8_t *)(dst + 3) = *(uint8_t *)(src)++; \
*(uint8_t *)(dst + 2) = *(uint8_t *)(src)++ ; \
}
#define _XFER_2_WR(dst, src) { \
*(uint8_t *)(dst + 1) = *(uint8_t *)(src)++; \
*(uint8_t *)(dst + 0) = *(uint8_t *)(src)++; \
}
/**
* @brief Types of actual Modbus implementation
*/
typedef enum
{
MB_PORT_SERIAL_MASTER = 0x00, /*!< Modbus port type serial master. */
MB_PORT_SERIAL_SLAVE, /*!< Modbus port type serial slave. */
MB_PORT_TCP_MASTER, /*!< Modbus port type TCP master. */
MB_PORT_TCP_SLAVE, /*!< Modbus port type TCP slave. */
MB_PORT_COUNT /*!< Modbus port count. */
} mb_port_type_t;
/**
* @brief Event group for parameters notification
*/
typedef enum
{
MB_EVENT_NO_EVENTS = 0x00,
MB_EVENT_HOLDING_REG_WR = BIT0, /*!< Modbus Event Write Holding registers. */
MB_EVENT_HOLDING_REG_RD = BIT1, /*!< Modbus Event Read Holding registers. */
MB_EVENT_INPUT_REG_RD = BIT3, /*!< Modbus Event Read Input registers. */
MB_EVENT_COILS_WR = BIT4, /*!< Modbus Event Write Coils. */
MB_EVENT_COILS_RD = BIT5, /*!< Modbus Event Read Coils. */
MB_EVENT_DISCRETE_RD = BIT6, /*!< Modbus Event Read Discrete bits. */
MB_EVENT_STACK_STARTED = BIT7 /*!< Modbus Event Stack started */
} mb_event_group_t;
/**
* @brief Type of Modbus parameter
*/
typedef enum {
MB_PARAM_HOLDING = 0x00, /*!< Modbus Holding register. */
MB_PARAM_INPUT, /*!< Modbus Input register. */
MB_PARAM_COIL, /*!< Modbus Coils. */
MB_PARAM_DISCRETE, /*!< Modbus Discrete bits. */
MB_PARAM_COUNT,
MB_PARAM_UNKNOWN = 0xFF
} mb_param_type_t;
/*!
* \brief Modbus serial transmission modes (RTU/ASCII).
*/
typedef enum {
MB_MODE_RTU, /*!< RTU transmission mode. */
MB_MODE_ASCII, /*!< ASCII transmission mode. */
MB_MODE_TCP /*!< TCP mode. */
} mb_mode_type_t; // Todo: This is common type leave it here for now
/**
* @brief Device communication structure to setup Modbus controller
*/
typedef union {
// Serial communication structure
struct {
mb_mode_type_t mode; /*!< Modbus communication mode */
uint8_t slave_addr; /*!< Modbus slave address field (dummy for master) */
uart_port_t port; /*!< Modbus communication port (UART) number */
uint32_t baudrate; /*!< Modbus baudrate */
uart_parity_t parity; /*!< Modbus UART parity settings */
uint16_t dummy_port;
};
// Tcp communication structure
struct {
mb_mode_type_t tcp_mode; /*!< Modbus communication mode */
uint8_t dummy_addr; /*!< Modbus slave address field (dummy for master) */
uart_port_t dummy_uart_port; /*!< Modbus communication port (UART) number */
uint32_t dummy_baudrate; /*!< Modbus baudrate */
uart_parity_t dummy_parity; /*!< Modbus UART parity settings */
uint16_t tcp_port; /*!< Modbus TCP port */
};
} mb_communication_info_t;
/**
* common interface method types
*/
typedef esp_err_t (*iface_init)(mb_port_type_t, void**); /*!< Interface method init */
typedef esp_err_t (*iface_destroy)(void); /*!< Interface method destroy */
typedef esp_err_t (*iface_setup)(void*); /*!< Interface method setup */
typedef esp_err_t (*iface_start)(void); /*!< Interface method start */
#endif // _MB_IFACE_COMMON_H