#include "PetitModbus.h"

Macros
#define	PETITMODBUS_READ_COILS (1)

#define	PETITMODBUS_READ_DISCRETE_INPUTS (2)

#define	PETITMODBUS_READ_HOLDING_REGISTERS (3)

#define	PETITMODBUS_READ_INPUT_REGISTERS (4)

#define	PETITMODBUS_WRITE_SINGLE_COIL (5)

#define	PETITMODBUS_WRITE_SINGLE_REGISTER (6)

#define	PETITMODBUS_WRITE_MULTIPLE_COILS (15)

#define	PETITMODBUS_WRITE_MULTIPLE_REGISTERS (16)

#define	PETIT_FALSE_FUNCTION (0)

#define	PETIT_FALSE_SLAVE_ADDRESS (1)

#define	PETIT_DATA_NOT_READY (2)

#define	PETIT_DATA_READY (3)

#define	PETIT_ERROR_CODE_01 (0x01)

#define	PETIT_ERROR_CODE_02 (0x02)

#define	PETIT_ERROR_CODE_03 (0X03)

#define	PETIT_ERROR_CODE_04 (0x04)

#define	PETIT_BUF_FN_CODE_I (1)

#define	PETIT_BUF_BYTE_CNT_I (6)

#define	PETIT_BUF_DAT_M(Idx)

Functions
void	PetitRxBufferReset ()

pb_t	PetitRxBufferInsert (pu8_t rcvd)

pb_t	PetitTxBufferPop (pu8_t *tx)

void	Petit_CRC16_Calc (const pu16_t Data)

pb_t	PetitSendMessage (void)

void	HandlePetitModbusError (pu8_t ErrorCode)

pu8_t	CheckPetitModbusBufferComplete (void)

void	Petit_RxRTU (void)

void	Petit_TxRTU (void)

void	Petit_ResponseProcess (void)

void	ProcessPetitModbus (void)

Variables
PETIT_RXTX_STATE	Petit_RxTx_State = PETIT_RXTX_RX

pu8_t	PetitBuffer [PETITMODBUS_RXTX_BUFFER_SIZE]

pu16_t	Petit_CRC16 = 0xFFFF

pu16_t	PetitBufI = 0

pu16_t	PetitBufJ = 0

pu8_t *	Petit_Ptr = &PetitBuffer[0]

pu16_t	Petit_Tx_Delay = 0

pu16_t	PetitExpectedReceiveCount = 0

Detailed Description

This file contains the core of PetitModbus.

Definition in file PetitModbus.c.

Macro Definition Documentation

◆ PETIT_BUF_BYTE_CNT_I

#define PETIT_BUF_BYTE_CNT_I (6)

Definition at line 31 of file PetitModbus.c.

◆ PETIT_BUF_DAT_M

#define PETIT_BUF_DAT_M ( Idx )

Value:

(((pu16_t)(PetitBuffer[2*(Idx) + 2]) << 8) \

| (pu16_t) (PetitBuffer[2*(Idx) + 3]))

PetitBuffer

pu8_t PetitBuffer[PETITMODBUS_RXTX_BUFFER_SIZE]

Definition PetitModbus.c:41

pu16_t

#define pu16_t

Definition PetitModbusUserPort.h:76

This macro extracts the contents of the buffer at index as a 16-bit unsigned integer

Definition at line 36 of file PetitModbus.c.

◆ PETIT_BUF_FN_CODE_I

#define PETIT_BUF_FN_CODE_I (1)

Definition at line 30 of file PetitModbus.c.

◆ PETIT_DATA_NOT_READY

#define PETIT_DATA_NOT_READY (2)

Definition at line 22 of file PetitModbus.c.

◆ PETIT_DATA_READY

#define PETIT_DATA_READY (3)

Definition at line 23 of file PetitModbus.c.

◆ PETIT_ERROR_CODE_01

#define PETIT_ERROR_CODE_01 (0x01)

Definition at line 25 of file PetitModbus.c.

◆ PETIT_ERROR_CODE_02

#define PETIT_ERROR_CODE_02 (0x02)

Definition at line 26 of file PetitModbus.c.

◆ PETIT_ERROR_CODE_03

#define PETIT_ERROR_CODE_03 (0X03)

Definition at line 27 of file PetitModbus.c.

◆ PETIT_ERROR_CODE_04

#define PETIT_ERROR_CODE_04 (0x04)

Definition at line 28 of file PetitModbus.c.

◆ PETIT_FALSE_FUNCTION

#define PETIT_FALSE_FUNCTION (0)

Definition at line 20 of file PetitModbus.c.

◆ PETIT_FALSE_SLAVE_ADDRESS

#define PETIT_FALSE_SLAVE_ADDRESS (1)

Definition at line 21 of file PetitModbus.c.

◆ PETITMODBUS_READ_COILS

#define PETITMODBUS_READ_COILS (1)

Definition at line 10 of file PetitModbus.c.

◆ PETITMODBUS_READ_DISCRETE_INPUTS

#define PETITMODBUS_READ_DISCRETE_INPUTS (2)

Definition at line 11 of file PetitModbus.c.

◆ PETITMODBUS_READ_HOLDING_REGISTERS

#define PETITMODBUS_READ_HOLDING_REGISTERS (3)

Definition at line 12 of file PetitModbus.c.

◆ PETITMODBUS_READ_INPUT_REGISTERS

#define PETITMODBUS_READ_INPUT_REGISTERS (4)

Definition at line 13 of file PetitModbus.c.

◆ PETITMODBUS_WRITE_MULTIPLE_COILS

#define PETITMODBUS_WRITE_MULTIPLE_COILS (15)

Definition at line 16 of file PetitModbus.c.

◆ PETITMODBUS_WRITE_MULTIPLE_REGISTERS

#define PETITMODBUS_WRITE_MULTIPLE_REGISTERS (16)

Definition at line 17 of file PetitModbus.c.

◆ PETITMODBUS_WRITE_SINGLE_COIL

#define PETITMODBUS_WRITE_SINGLE_COIL (5)

Definition at line 14 of file PetitModbus.c.

◆ PETITMODBUS_WRITE_SINGLE_REGISTER

#define PETITMODBUS_WRITE_SINGLE_REGISTER (6)

Definition at line 15 of file PetitModbus.c.

Function Documentation

◆ CheckPetitModbusBufferComplete()

CheckPetitModbusBufferComplete ( void )

Returns: DATA_READY If data is ready FALSE_SLAVE_ADDRESS If slave address is wrong DATA_NOT_READY If data is not ready FALSE_FUNCTION If functions is wrong

Definition at line 586 of file PetitModbus.c.

◆ HandlePetitModbusError()

void HandlePetitModbusError ( pu8_t ErrorCode )

Definition at line 172 of file PetitModbus.c.

◆ Petit_CRC16_Calc()

void Petit_CRC16_Calc ( const pu16_t Data )

Definition at line 126 of file PetitModbus.c.

◆ Petit_ResponseProcess()

Petit_ResponseProcess ( void )

This function processes the modbus response once it has been determined that the message is for this node and the length is correct.

Note: Only use this function if rx is clear for processing

Definition at line 696 of file PetitModbus.c.

◆ Petit_RxRTU()

Petit_RxRTU ( void )

Check for data ready, if it is good return answer

Definition at line 630 of file PetitModbus.c.

◆ Petit_TxRTU()

Petit_TxRTU ( void )

If data is ready send answers!

Definition at line 672 of file PetitModbus.c.

◆ PetitRxBufferInsert()

pb_t PetitRxBufferInsert ( pu8_t rcvd )

Inserts bits into the buffer on device receive.

Parameters

[in] rcvd the byte to insert into the buffer

Returns: bytes "left" to insert into buffer (1 if byte insertion failed)

Definition at line 75 of file PetitModbus.c.

◆ PetitRxBufferReset()

void PetitRxBufferReset ( void )

Reset the modbus buffer.

This function is called by the interrupt code that handles byte to byte time overrun. It is also called by the validation function to reject data that is not for this device before more system resources are taken.

Definition at line 62 of file PetitModbus.c.

◆ PetitSendMessage()

PetitSendMessage ( void )

This function starts to send messages.

Returns: always returns true

Definition at line 157 of file PetitModbus.c.

◆ PetitTxBufferPop()

pb_t PetitTxBufferPop ( pu8_t * tx )

This function removes a byte from the buffer and places it on "tx" to be sent over rs485.

Parameters

[out] tx

Returns: 1 if there is a byte to be sent, 0 otherwise if the buffer is empty

Definition at line 94 of file PetitModbus.c.

◆ ProcessPetitModbus()

ProcessPetitModbus ( void )

ModBus main core! Call this function into main!

stateDiagram-v2 [*] --> PETIT_RXTX_RX PETIT_RXTX_RX --> PETIT_RXTX_RX: Message not ready PETIT_RXTX_RX --> PETIT_RXTX_PROCESS: Message Ready PETIT_RXTX_PROCESS --> PETIT_RXTX_TX_DATABUF PETIT_RXTX_TX_DATABUF --> PETIT_RXTX_TX_DLY PETIT_RXTX_TX_DLY --> PETIT_RXTX_TX PETIT_RXTX_TX --> PETIT_RXTX_RX

Definition at line 750 of file PetitModbus.c.

Variable Documentation

◆ Petit_CRC16

pu16_t Petit_CRC16 = 0xFFFF

Definition at line 42 of file PetitModbus.c.

◆ Petit_Ptr

pu8_t* Petit_Ptr = &PetitBuffer[0]

Definition at line 48 of file PetitModbus.c.

◆ Petit_RxTx_State

PETIT_RXTX_STATE Petit_RxTx_State = PETIT_RXTX_RX

Definition at line 40 of file PetitModbus.c.

◆ Petit_Tx_Delay

pu16_t Petit_Tx_Delay = 0

Definition at line 50 of file PetitModbus.c.

◆ PetitBuffer