Modbus - modified for NuMaker_PFM series

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modified for NuMaker_PFM series

Dependents: NuMaker-mbed-modbus-sample NuMaker_NuWicam_Lite NuMaker-mbed-modbus-sample

Fork of Modbus by Wayne Lin

portserial.cpp@0:274eb57e1df3, 2010-08-22 (annotated)

Committer:: giryan
Date:: Sun Aug 22 16:34:20 2010 +0000
Revision:: 0:274eb57e1df3
Child:: 1:cfde7320b0bf

Who changed what in which revision?

User	Revision	Line number	New contents of line
giryan	0:274eb57e1df3	1	/*
giryan	0:274eb57e1df3	2	* FreeModbus Libary: BARE Port
giryan	0:274eb57e1df3	3	* Copyright (C) 2006 Christian Walter <wolti@sil.at>
giryan	0:274eb57e1df3	4	*
giryan	0:274eb57e1df3	5	* This library is free software; you can redistribute it and/or
giryan	0:274eb57e1df3	6	* modify it under the terms of the GNU Lesser General Public
giryan	0:274eb57e1df3	7	* License as published by the Free Software Foundation; either
giryan	0:274eb57e1df3	8	* version 2.1 of the License, or (at your option) any later version.
giryan	0:274eb57e1df3	9	*
giryan	0:274eb57e1df3	10	* This library is distributed in the hope that it will be useful,
giryan	0:274eb57e1df3	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
giryan	0:274eb57e1df3	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
giryan	0:274eb57e1df3	13	* Lesser General Public License for more details.
giryan	0:274eb57e1df3	14	*
giryan	0:274eb57e1df3	15	* You should have received a copy of the GNU Lesser General Public
giryan	0:274eb57e1df3	16	* License along with this library; if not, write to the Free Software
giryan	0:274eb57e1df3	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
giryan	0:274eb57e1df3	18	*
giryan	0:274eb57e1df3	19	* File: $Id: portserial.c,v 1.1 2006/08/22 21:35:13 wolti Exp $
giryan	0:274eb57e1df3	20	*/
giryan	0:274eb57e1df3	21
giryan	0:274eb57e1df3	22	/* ----------------------- System includes ----------------------------------*/
giryan	0:274eb57e1df3	23	#include "mbed.h" // Cam
giryan	0:274eb57e1df3	24
giryan	0:274eb57e1df3	25	/* ----------------------- Platform includes --------------------------------*/
giryan	0:274eb57e1df3	26	#include "port.h"
giryan	0:274eb57e1df3	27
giryan	0:274eb57e1df3	28	/* ----------------------- Modbus includes ----------------------------------*/
giryan	0:274eb57e1df3	29	#include "mb.h"
giryan	0:274eb57e1df3	30	#include "mbport.h"
giryan	0:274eb57e1df3	31
giryan	0:274eb57e1df3	32
giryan	0:274eb57e1df3	33	/* ----------------------- static functions ---------------------------------*/
giryan	0:274eb57e1df3	34	static void prvvUARTTxReadyISR( void );
giryan	0:274eb57e1df3	35	static void prvvUARTRxISR( void );
giryan	0:274eb57e1df3	36	static void prvvUARTISR( void );
giryan	0:274eb57e1df3	37
giryan	0:274eb57e1df3	38	/* ----------------------- System Variables ---------------------------------*/
giryan	0:274eb57e1df3	39	Serial pc(USBTX, USBRX); // Cam - mbed USB serial port
giryan	0:274eb57e1df3	40
giryan	0:274eb57e1df3	41	Ticker simISR; // Cam - mbed ticker
giryan	0:274eb57e1df3	42	// we don't have the TX buff empty interrupt, so
giryan	0:274eb57e1df3	43	// we just interrupt every 1 mSec and read RX & TX
giryan	0:274eb57e1df3	44	// status to simulate the proper ISRs.
giryan	0:274eb57e1df3	45
giryan	0:274eb57e1df3	46	static BOOL RxEnable, TxEnable; // Cam - keep a static copy of the RxEnable and TxEnable
giryan	0:274eb57e1df3	47	// status for the simulated ISR (ticker)
giryan	0:274eb57e1df3	48
giryan	0:274eb57e1df3	49
giryan	0:274eb57e1df3	50	/* ----------------------- Start implementation -----------------------------*/
giryan	0:274eb57e1df3	51	// Cam - This is called every 1mS to simulate Rx character received ISR and
giryan	0:274eb57e1df3	52	// Tx buffer empty ISR.
giryan	0:274eb57e1df3	53	static void
giryan	0:274eb57e1df3	54	prvvUARTISR( void )
giryan	0:274eb57e1df3	55	{
giryan	0:274eb57e1df3	56	if (TxEnable)
giryan	0:274eb57e1df3	57	if(pc.writeable())
giryan	0:274eb57e1df3	58	prvvUARTTxReadyISR();
giryan	0:274eb57e1df3	59
giryan	0:274eb57e1df3	60	if (RxEnable)
giryan	0:274eb57e1df3	61	if(pc.readable())
giryan	0:274eb57e1df3	62	prvvUARTRxISR();
giryan	0:274eb57e1df3	63	}
giryan	0:274eb57e1df3	64
giryan	0:274eb57e1df3	65	void
giryan	0:274eb57e1df3	66	vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
giryan	0:274eb57e1df3	67	{
giryan	0:274eb57e1df3	68	/* If xRXEnable enable serial receive interrupts. If xTxENable enable
giryan	0:274eb57e1df3	69	* transmitter empty interrupts.
giryan	0:274eb57e1df3	70	*/
giryan	0:274eb57e1df3	71	RxEnable = xRxEnable;
giryan	0:274eb57e1df3	72	TxEnable = xTxEnable;
giryan	0:274eb57e1df3	73	}
giryan	0:274eb57e1df3	74
giryan	0:274eb57e1df3	75	BOOL
giryan	0:274eb57e1df3	76	xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
giryan	0:274eb57e1df3	77	{
giryan	0:274eb57e1df3	78	simISR.attach_us(&prvvUARTISR,1000); // Cam - attach prvvUARTISR to a 1mS ticker to simulate serial interrupt behaviour
giryan	0:274eb57e1df3	79	// 1mS is just short of a character time at 9600 bps, so quick enough to pick
giryan	0:274eb57e1df3	80	// up status on a character by character basis.
giryan	0:274eb57e1df3	81	return TRUE;
giryan	0:274eb57e1df3	82	}
giryan	0:274eb57e1df3	83
giryan	0:274eb57e1df3	84	BOOL
giryan	0:274eb57e1df3	85	xMBPortSerialPutByte( CHAR ucByte )
giryan	0:274eb57e1df3	86	{
giryan	0:274eb57e1df3	87	/* Put a byte in the UARTs transmit buffer. This function is called
giryan	0:274eb57e1df3	88	* by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
giryan	0:274eb57e1df3	89	* called. */
giryan	0:274eb57e1df3	90	pc.putc( ucByte);
giryan	0:274eb57e1df3	91	return TRUE;
giryan	0:274eb57e1df3	92	}
giryan	0:274eb57e1df3	93
giryan	0:274eb57e1df3	94	BOOL
giryan	0:274eb57e1df3	95	xMBPortSerialGetByte( CHAR * pucByte )
giryan	0:274eb57e1df3	96	{
giryan	0:274eb57e1df3	97	/* Return the byte in the UARTs receive buffer. This function is called
giryan	0:274eb57e1df3	98	* by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
giryan	0:274eb57e1df3	99	*/
giryan	0:274eb57e1df3	100	* pucByte = pc.getc();
giryan	0:274eb57e1df3	101	return TRUE;
giryan	0:274eb57e1df3	102	}
giryan	0:274eb57e1df3	103
giryan	0:274eb57e1df3	104	/* Create an interrupt handler for the transmit buffer empty interrupt
giryan	0:274eb57e1df3	105	* (or an equivalent) for your target processor. This function should then
giryan	0:274eb57e1df3	106	* call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
giryan	0:274eb57e1df3	107	* a new character can be sent. The protocol stack will then call
giryan	0:274eb57e1df3	108	* xMBPortSerialPutByte( ) to send the character.
giryan	0:274eb57e1df3	109	*/
giryan	0:274eb57e1df3	110	static void prvvUARTTxReadyISR( void )
giryan	0:274eb57e1df3	111	{
giryan	0:274eb57e1df3	112	pxMBFrameCBTransmitterEmpty( );
giryan	0:274eb57e1df3	113	}
giryan	0:274eb57e1df3	114
giryan	0:274eb57e1df3	115	/* Create an interrupt handler for the receive interrupt for your target
giryan	0:274eb57e1df3	116	* processor. This function should then call pxMBFrameCBByteReceived( ). The
giryan	0:274eb57e1df3	117	* protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
giryan	0:274eb57e1df3	118	* character.
giryan	0:274eb57e1df3	119	*/
giryan	0:274eb57e1df3	120	static void prvvUARTRxISR( void )
giryan	0:274eb57e1df3	121	{
giryan	0:274eb57e1df3	122	pxMBFrameCBByteReceived( );
giryan	0:274eb57e1df3	123	}
giryan	0:274eb57e1df3	124
giryan	0:274eb57e1df3	125

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Type:	Library
Created:	08 Feb 2017
Imports:	8
Forks:	0
Commits:	14
Dependents:	3
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portserial.cpp@0:274eb57e1df3, 2010-08-22 (annotated)

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