hsu han-lin / Mbed 2 deprecated Modbus_Test

from Cam Marshall original modbus

Dependencies:   mbed

Fork of Modbus by Cam Marshall

Modbus/portserial.cpp@1:7dc3a566a85a, 2017-03-02 (annotated)

Committer:
stanley1228
Date:
Thu Mar 02 12:08:11 2017 +0000
Revision:
1:7dc3a566a85a
Parent:
portserial.cpp@0:0453a0a7e500
Child:
2:5f360876388e
from Cam Marshall original modbus

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cam 0:0453a0a7e500 1 /*
cam 0:0453a0a7e500 2 * FreeModbus Libary: BARE Port
cam 0:0453a0a7e500 3 * Copyright (C) 2006 Christian Walter <wolti@sil.at>
cam 0:0453a0a7e500 4 *
cam 0:0453a0a7e500 5 * This library is free software; you can redistribute it and/or
cam 0:0453a0a7e500 6 * modify it under the terms of the GNU Lesser General Public
cam 0:0453a0a7e500 7 * License as published by the Free Software Foundation; either
cam 0:0453a0a7e500 8 * version 2.1 of the License, or (at your option) any later version.
cam 0:0453a0a7e500 9 *
cam 0:0453a0a7e500 10 * This library is distributed in the hope that it will be useful,
cam 0:0453a0a7e500 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
cam 0:0453a0a7e500 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
cam 0:0453a0a7e500 13 * Lesser General Public License for more details.
cam 0:0453a0a7e500 14 *
cam 0:0453a0a7e500 15 * You should have received a copy of the GNU Lesser General Public
cam 0:0453a0a7e500 16 * License along with this library; if not, write to the Free Software
cam 0:0453a0a7e500 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
cam 0:0453a0a7e500 18 *
cam 0:0453a0a7e500 19 * File: $Id: portserial.c,v 1.1 2006/08/22 21:35:13 wolti Exp $
cam 0:0453a0a7e500 20 */
cam 0:0453a0a7e500 21
cam 0:0453a0a7e500 22 /* ----------------------- System includes ----------------------------------*/
cam 0:0453a0a7e500 23 #include "mbed.h" // Cam
cam 0:0453a0a7e500 24
cam 0:0453a0a7e500 25 /* ----------------------- Platform includes --------------------------------*/
cam 0:0453a0a7e500 26 #include "port.h"
cam 0:0453a0a7e500 27
cam 0:0453a0a7e500 28 /* ----------------------- Modbus includes ----------------------------------*/
cam 0:0453a0a7e500 29 #include "mb.h"
cam 0:0453a0a7e500 30 #include "mbport.h"
cam 0:0453a0a7e500 31
cam 0:0453a0a7e500 32
cam 0:0453a0a7e500 33 /* ----------------------- static functions ---------------------------------*/
cam 0:0453a0a7e500 34 static void prvvUARTTxReadyISR( void );
cam 0:0453a0a7e500 35 static void prvvUARTRxISR( void );
cam 0:0453a0a7e500 36 static void prvvUARTISR( void );
cam 0:0453a0a7e500 37
cam 0:0453a0a7e500 38 /* ----------------------- System Variables ---------------------------------*/
cam 0:0453a0a7e500 39 Serial pc(USBTX, USBRX); // Cam - mbed USB serial port
cam 0:0453a0a7e500 40
cam 0:0453a0a7e500 41 Ticker simISR; // Cam - mbed ticker
cam 0:0453a0a7e500 42 // we don't have the TX buff empty interrupt, so
cam 0:0453a0a7e500 43 // we just interrupt every 1 mSec and read RX & TX
cam 0:0453a0a7e500 44 // status to simulate the proper ISRs.
cam 0:0453a0a7e500 45
cam 0:0453a0a7e500 46 static BOOL RxEnable, TxEnable; // Cam - keep a static copy of the RxEnable and TxEnable
cam 0:0453a0a7e500 47 // status for the simulated ISR (ticker)
cam 0:0453a0a7e500 48
cam 0:0453a0a7e500 49
cam 0:0453a0a7e500 50 /* ----------------------- Start implementation -----------------------------*/
cam 0:0453a0a7e500 51 // Cam - This is called every 1mS to simulate Rx character received ISR and
cam 0:0453a0a7e500 52 // Tx buffer empty ISR.
cam 0:0453a0a7e500 53 static void
cam 0:0453a0a7e500 54 prvvUARTISR( void )
cam 0:0453a0a7e500 55 {
cam 0:0453a0a7e500 56 if (TxEnable)
cam 0:0453a0a7e500 57 if(pc.writeable())
cam 0:0453a0a7e500 58 prvvUARTTxReadyISR();
cam 0:0453a0a7e500 59
cam 0:0453a0a7e500 60 if (RxEnable)
cam 0:0453a0a7e500 61 if(pc.readable())
cam 0:0453a0a7e500 62 prvvUARTRxISR();
cam 0:0453a0a7e500 63 }
cam 0:0453a0a7e500 64
cam 0:0453a0a7e500 65 void
cam 0:0453a0a7e500 66 vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
cam 0:0453a0a7e500 67 {
cam 0:0453a0a7e500 68 /* If xRXEnable enable serial receive interrupts. If xTxENable enable
cam 0:0453a0a7e500 69 * transmitter empty interrupts.
cam 0:0453a0a7e500 70 */
cam 0:0453a0a7e500 71 RxEnable = xRxEnable;
cam 0:0453a0a7e500 72 TxEnable = xTxEnable;
cam 0:0453a0a7e500 73 }
cam 0:0453a0a7e500 74
cam 0:0453a0a7e500 75 BOOL
cam 0:0453a0a7e500 76 xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
cam 0:0453a0a7e500 77 {
cam 0:0453a0a7e500 78 simISR.attach_us(&prvvUARTISR,1000); // Cam - attach prvvUARTISR to a 1mS ticker to simulate serial interrupt behaviour
cam 0:0453a0a7e500 79 // 1mS is just short of a character time at 9600 bps, so quick enough to pick
cam 0:0453a0a7e500 80 // up status on a character by character basis.
cam 0:0453a0a7e500 81 return TRUE;
cam 0:0453a0a7e500 82 }
cam 0:0453a0a7e500 83
cam 0:0453a0a7e500 84 BOOL
cam 0:0453a0a7e500 85 xMBPortSerialPutByte( CHAR ucByte )
cam 0:0453a0a7e500 86 {
cam 0:0453a0a7e500 87 /* Put a byte in the UARTs transmit buffer. This function is called
cam 0:0453a0a7e500 88 * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
cam 0:0453a0a7e500 89 * called. */
cam 0:0453a0a7e500 90 pc.putc( ucByte);
cam 0:0453a0a7e500 91 return TRUE;
cam 0:0453a0a7e500 92 }
cam 0:0453a0a7e500 93
cam 0:0453a0a7e500 94 BOOL
cam 0:0453a0a7e500 95 xMBPortSerialGetByte( CHAR * pucByte )
cam 0:0453a0a7e500 96 {
cam 0:0453a0a7e500 97 /* Return the byte in the UARTs receive buffer. This function is called
cam 0:0453a0a7e500 98 * by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
cam 0:0453a0a7e500 99 */
cam 0:0453a0a7e500 100 * pucByte = pc.getc();
cam 0:0453a0a7e500 101 return TRUE;
cam 0:0453a0a7e500 102 }
cam 0:0453a0a7e500 103
cam 0:0453a0a7e500 104 /* Create an interrupt handler for the transmit buffer empty interrupt
cam 0:0453a0a7e500 105 * (or an equivalent) for your target processor. This function should then
cam 0:0453a0a7e500 106 * call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
cam 0:0453a0a7e500 107 * a new character can be sent. The protocol stack will then call
cam 0:0453a0a7e500 108 * xMBPortSerialPutByte( ) to send the character.
cam 0:0453a0a7e500 109 */
cam 0:0453a0a7e500 110 static void prvvUARTTxReadyISR( void )
cam 0:0453a0a7e500 111 {
cam 0:0453a0a7e500 112 pxMBFrameCBTransmitterEmpty( );
cam 0:0453a0a7e500 113 }
cam 0:0453a0a7e500 114
cam 0:0453a0a7e500 115 /* Create an interrupt handler for the receive interrupt for your target
cam 0:0453a0a7e500 116 * processor. This function should then call pxMBFrameCBByteReceived( ). The
cam 0:0453a0a7e500 117 * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
cam 0:0453a0a7e500 118 * character.
cam 0:0453a0a7e500 119 */
cam 0:0453a0a7e500 120 static void prvvUARTRxISR( void )
cam 0:0453a0a7e500 121 {
cam 0:0453a0a7e500 122 pxMBFrameCBByteReceived( );
cam 0:0453a0a7e500 123 }
cam 0:0453a0a7e500 124
cam 0:0453a0a7e500 125