/*
 *	Generic MODBUS Library for STM32: Protocol Constants
 *
 *	(c) 2019--2022 Martin Mareš <mj@ucw.cz>
 */

enum modbus_function {
	MODBUS_FUNC_READ_COILS = 0x01,
	MODBUS_FUNC_READ_DISCRETE_INPUTS = 0x02,
	MODBUS_FUNC_READ_HOLDING_REGISTERS = 0x03,
	MODBUS_FUNC_READ_INPUT_REGISTERS = 0x04,
	MODBUS_FUNC_WRITE_SINGLE_COIL = 0x05,
	MODBUS_FUNC_WRITE_SINGLE_REGISTER = 0x06,
	MODBUS_FUNC_READ_EXCEPTION_STATUS = 0x07,
	MODBUS_FUNC_DIAGNOSTICS = 0x08,
	MODBUS_FUNC_GET_COMM_EVENT_COUNTER = 0x0b,
	MODBUS_FUNC_GET_COMM_EVENT_LOG = 0x0c,
	MODBUS_FUNC_WRITE_MULTIPLE_COILS = 0x0f,
	MODBUS_FUNC_WRITE_MULTIPLE_REGISTERS = 0x10,
	MODBUS_FUNC_REPORT_SLAVE_ID = 0x11,
	MODBUS_FUNC_READ_FILE_RECORD = 0x14,
	MODBUS_FUNC_WRITE_FILE_RECORD = 0x15,
	MODBUS_FUNC_MASK_WRITE_REGISTER = 0x16,
	MODBUS_FUNC_READ_WRITE_MULTIPLE_REGISTERS = 0x17,
	MODBUS_FUNC_READ_FIFO_QUEUE = 0x18,
	MODBUS_FUNC_ENCAPSULATED_INTERFACE_TRANSPORT = 0x2b,
};

enum modbus_error {
	MODBUS_ERR_ILLEGAL_FUNCTION = 0x01,
	MODBUS_ERR_ILLEGAL_DATA_ADDRESS = 0x02,
	MODBUS_ERR_ILLEGAL_DATA_VALUE = 0x03,
	MODBUS_ERR_SLAVE_DEVICE_FAILURE = 0x04,
	MODBUS_ERR_ACKNOWLEDGE = 0x05,
	MODBUS_ERR_SLAVE_DEVICE_BUSY = 0x06,
	MODBUS_ERR_MEMORY_PARITY_ERROR = 0x08,
	MODBUS_ERR_GATEWAY_PATH_UNAVAILABLE = 0x0a,
	MODBUS_ERR_GATEWAY_TARGET_DEVICE_FAILED = 0x0b,
};

enum modbus_encapsulated_interface_transport_type {
	MODBUS_EIT_CANOPEN = 0x0d,
	MODBUS_EIT_READ_DEVICE_IDENT = 0x0e,
};