63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/************************************************************************//**
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* \file modbus.h
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* \brief Modbus serial library
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***************************************************************************/
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#ifndef MODBUS_H
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#define MODBUS_H
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#include <stdint.h>
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extern uint8_t modbusAddress;
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extern uint16_t input_registers[2];
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extern uint16_t holding_registers[2];
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/**
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* Initializes this Modbus library.
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*
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* Initialize pins, timer, serial port and variables. Interrupts
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* MUST be initialized for the timer and the serial port.
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*
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* @param address : the Modbus address of this device
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*
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* @see modbus_char_recvd
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* @see modbus_timer
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* @see interrupts.c
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*/
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void modbus_init(uint8_t address);
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/**
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* Analyses the received frame and answer to server
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*
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* @return an error code if frame not valid
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*/
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uint8_t modbus_analyse_and_answer(void);
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/**
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* Send the Modbus frame on tx_buf with CRC added
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*
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* @param length : length of the frame without the CRC
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*/
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void modbus_send(uint8_t length);
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/**
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*
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* This function will be called every time a character has been received on the
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* Modbus serial port. It is called from the interrupt hander.
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*
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* @param c : the received char
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* @see interrupts.c.
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*/
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void modbus_char_recvd(uint8_t c);
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/**
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* Modbus timer finished. This function is called by the interrupt handler
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* when a MODBUS frame is finished. It must analyse the received packet
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* and reply if required.
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*
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* @see interrupts.c
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*/
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void modbus_timer(void);
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#endif /* MODBUS_H */
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