Wayne Lin / Modbus

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Dependents:   modbus-over-rs485-sample NTOUEE-mbed-modbus-RTU NuMaker_NuWicam_Lite

Fork of Modbus by Matthew Waddilove

portserial.cpp@5:d4c3b20819a7, 2016-09-20 (annotated)

Committer:
wclin
Date:
Tue Sep 20 06:28:05 2016 +0000
Revision:
5:d4c3b20819a7
Parent:
4:2e39e548bc08
Child:
6:08849dd9654d
Polling UART port in main thread.

Who changed what in which revision?

UserRevisionLine numberNew 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
wclin 5:d4c3b20819a7 38 //#define DEF_RS485_PORT 1
giryan 0:274eb57e1df3 39 /* ----------------------- System Variables ---------------------------------*/
wclin 3:419ee4c5e10f 40
wclin 3:419ee4c5e10f 41 #if defined(DEF_RS485_PORT) // mbed serial port
wclin 3:419ee4c5e10f 42 #include "nvt_rs485.h"
wclin 3:419ee4c5e10f 43 // RS485 TX, RX, RTS pins
wclin 3:419ee4c5e10f 44 NvtRS485 pc(PF_13, PF_14, PF_11);
wclin 3:419ee4c5e10f 45 #else
wclin 3:419ee4c5e10f 46 //UART TX, RX
wclin 3:419ee4c5e10f 47 Serial pc(PG_2, PG_1);
wclin 3:419ee4c5e10f 48 #endif
giryan 0:274eb57e1df3 49
wclin 2:6ee56c002f64 50 static volatile BOOL RxEnable, TxEnable; // Cam - keep a static copy of the RxEnable and TxEnable
giryan 0:274eb57e1df3 51 // status for the simulated ISR (ticker)
giryan 0:274eb57e1df3 52
giryan 0:274eb57e1df3 53
giryan 0:274eb57e1df3 54 /* ----------------------- Start implementation -----------------------------*/
giryan 0:274eb57e1df3 55 // Cam - This is called every 1mS to simulate Rx character received ISR and
giryan 0:274eb57e1df3 56 // Tx buffer empty ISR.
giryan 0:274eb57e1df3 57 static void
giryan 0:274eb57e1df3 58 prvvUARTISR( void )
giryan 0:274eb57e1df3 59 {
wclin 3:419ee4c5e10f 60 if ( TxEnable )
giryan 0:274eb57e1df3 61 if(pc.writeable())
giryan 0:274eb57e1df3 62 prvvUARTTxReadyISR();
wclin 3:419ee4c5e10f 63
wclin 3:419ee4c5e10f 64 if ( RxEnable )
giryan 0:274eb57e1df3 65 if(pc.readable())
wclin 3:419ee4c5e10f 66 prvvUARTRxISR();
giryan 0:274eb57e1df3 67 }
giryan 0:274eb57e1df3 68
giryan 0:274eb57e1df3 69 void
giryan 0:274eb57e1df3 70 vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
giryan 0:274eb57e1df3 71 {
giryan 0:274eb57e1df3 72 /* If xRXEnable enable serial receive interrupts. If xTxENable enable
giryan 0:274eb57e1df3 73 * transmitter empty interrupts.
giryan 0:274eb57e1df3 74 */
giryan 0:274eb57e1df3 75 RxEnable = xRxEnable;
giryan 0:274eb57e1df3 76 TxEnable = xTxEnable;
wclin 3:419ee4c5e10f 77
wclin 3:419ee4c5e10f 78 //printf("\r\nRx: %d, TX:%d\r\n", RxEnable, TxEnable);
giryan 0:274eb57e1df3 79 }
giryan 0:274eb57e1df3 80
wclin 1:cfde7320b0bf 81 /* ----------------------- Start implementation -----------------------------*/
giryan 0:274eb57e1df3 82 BOOL
giryan 0:274eb57e1df3 83 xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
giryan 0:274eb57e1df3 84 {
wclin 1:cfde7320b0bf 85 pc.baud(ulBaudRate);
wclin 3:419ee4c5e10f 86 #if defined(DEF_RS485_PORT) // mbed serial port
wclin 3:419ee4c5e10f 87 pc.set_rs485_mode(PF_11);
wclin 3:419ee4c5e10f 88 #endif
wclin 1:cfde7320b0bf 89 return TRUE;
wclin 1:cfde7320b0bf 90 }
wclin 1:cfde7320b0bf 91
wclin 1:cfde7320b0bf 92 void xMBPortSerialPolling( void )
wclin 1:cfde7320b0bf 93 {
wclin 1:cfde7320b0bf 94 prvvUARTISR( );
wclin 1:cfde7320b0bf 95 }
wclin 1:cfde7320b0bf 96
giryan 0:274eb57e1df3 97 BOOL
giryan 0:274eb57e1df3 98 xMBPortSerialPutByte( CHAR ucByte )
giryan 0:274eb57e1df3 99 {
giryan 0:274eb57e1df3 100 /* Put a byte in the UARTs transmit buffer. This function is called
giryan 0:274eb57e1df3 101 * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
giryan 0:274eb57e1df3 102 * called. */
wclin 3:419ee4c5e10f 103 //printf("[%02x]", ucByte );
giryan 0:274eb57e1df3 104 pc.putc( ucByte);
giryan 0:274eb57e1df3 105 return TRUE;
giryan 0:274eb57e1df3 106 }
giryan 0:274eb57e1df3 107
giryan 0:274eb57e1df3 108 BOOL
giryan 0:274eb57e1df3 109 xMBPortSerialGetByte( CHAR * pucByte )
giryan 0:274eb57e1df3 110 {
giryan 0:274eb57e1df3 111 /* Return the byte in the UARTs receive buffer. This function is called
giryan 0:274eb57e1df3 112 * by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
giryan 0:274eb57e1df3 113 */
wclin 3:419ee4c5e10f 114 *pucByte = pc.getc();
wclin 3:419ee4c5e10f 115 //printf("<%02x>", *pucByte );
giryan 0:274eb57e1df3 116 return TRUE;
giryan 0:274eb57e1df3 117 }
giryan 0:274eb57e1df3 118
giryan 0:274eb57e1df3 119 /* Create an interrupt handler for the transmit buffer empty interrupt
giryan 0:274eb57e1df3 120 * (or an equivalent) for your target processor. This function should then
giryan 0:274eb57e1df3 121 * call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
giryan 0:274eb57e1df3 122 * a new character can be sent. The protocol stack will then call
giryan 0:274eb57e1df3 123 * xMBPortSerialPutByte( ) to send the character.
giryan 0:274eb57e1df3 124 */
giryan 0:274eb57e1df3 125 static void prvvUARTTxReadyISR( void )
giryan 0:274eb57e1df3 126 {
giryan 0:274eb57e1df3 127 pxMBFrameCBTransmitterEmpty( );
giryan 0:274eb57e1df3 128 }
giryan 0:274eb57e1df3 129
giryan 0:274eb57e1df3 130 /* Create an interrupt handler for the receive interrupt for your target
giryan 0:274eb57e1df3 131 * processor. This function should then call pxMBFrameCBByteReceived( ). The
giryan 0:274eb57e1df3 132 * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
giryan 0:274eb57e1df3 133 * character.
giryan 0:274eb57e1df3 134 */
giryan 0:274eb57e1df3 135 static void prvvUARTRxISR( void )
giryan 0:274eb57e1df3 136 {
wclin 2:6ee56c002f64 137 vMBPortTimersDisable();
giryan 0:274eb57e1df3 138 pxMBFrameCBByteReceived( );
giryan 0:274eb57e1df3 139 }
giryan 0:274eb57e1df3 140
giryan 0:274eb57e1df3 141