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portserial.cpp
00001 /* 00002 * FreeModbus Libary: BARE Port 00003 * Copyright (C) 2006 Christian Walter <wolti@sil.at> 00004 * 00005 * This library is free software; you can redistribute it and/or 00006 * modify it under the terms of the GNU Lesser General Public 00007 * License as published by the Free Software Foundation; either 00008 * version 2.1 of the License, or (at your option) any later version. 00009 * 00010 * This library is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * Lesser General Public License for more details. 00014 * 00015 * You should have received a copy of the GNU Lesser General Public 00016 * License along with this library; if not, write to the Free Software 00017 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00018 * 00019 * File: $Id: portserial.c,v 1.1 2006/08/22 21:35:13 wolti Exp $ 00020 */ 00021 00022 /* ----------------------- System includes ----------------------------------*/ 00023 #include "mbed.h" // Cam 00024 00025 /* ----------------------- Platform includes --------------------------------*/ 00026 #include "port.h" 00027 00028 /* ----------------------- Modbus includes ----------------------------------*/ 00029 #include "mb.h" 00030 #include "mbport.h" 00031 00032 00033 /* ----------------------- static functions ---------------------------------*/ 00034 static void prvvUARTTxReadyISR( void ); 00035 static void prvvUARTRxISR( void ); 00036 00037 00038 /* ----------------------- System Variables ---------------------------------*/ 00039 Serial ser3(PB_6, PB_7); //serial3 00040 extern Serial pc; 00041 static uint8_t grx_buf=0; 00042 00043 /* ----------------------- Start implementation -----------------------------*/ 00044 void 00045 vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable ) 00046 { 00047 /* If xRXEnable enable serial receive interrupts. If xTxENable enable 00048 * transmitter empty interrupts. 00049 */ 00050 00051 00052 //stanley 00053 ENTER_CRITICAL_SECTION( ); 00054 00055 00056 ser3.attach(NULL); //close all 00057 00058 if(xRxEnable) 00059 ser3.attach(&prvvUARTRxISR,Serial::RxIrq); 00060 00061 if(xTxEnable) 00062 { 00063 ser3.attach(&prvvUARTTxReadyISR,Serial::TxIrq); 00064 while(!ser3.writeable()); 00065 prvvUARTTxReadyISR(); 00066 } 00067 EXIT_CRITICAL_SECTION( ); 00068 00069 //if(xTxEnable) 00070 //���Φb�o��]�wser3.write(tx_buf,TX_BUFF_LENGTH,serialTxCBEvent,SERIAL_EVENT_TX_COMPLETE); 00071 00072 //else 00073 //{ 00074 // ser3.attach(NULL,Serial::RxIrq); //stanley the test result find that this may disable RxIrq and TxIrq so have to enable TxIrq 00075 // ser3.attach(&prvvUARTTxReadyISR,Serial::TxIrq); 00076 //} 00077 } 00078 00079 BOOL 00080 xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity ) 00081 { 00082 00083 ser3.baud(ulBaudRate); //stanley 00084 00085 00086 return TRUE; 00087 } 00088 00089 BOOL 00090 xMBPortSerialPutByte( CHAR ucByte ) 00091 { 00092 /* Put a byte in the UARTs transmit buffer. This function is called 00093 * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been 00094 * called. */ 00095 00096 //stanley 00097 ser3.putc( ucByte); 00098 00099 return TRUE; 00100 } 00101 00102 BOOL 00103 xMBPortSerialGetByte( CHAR * pucByte ) 00104 { 00105 /* Return the byte in the UARTs receive buffer. This function is called 00106 * by the protocol stack after pxMBFrameCBByteReceived( ) has been called. 00107 */ 00108 00109 *pucByte = grx_buf;//stanley 00110 00111 00112 00113 return TRUE; 00114 } 00115 00116 /* Create an interrupt handler for the transmit buffer empty interrupt 00117 * (or an equivalent) for your target processor. This function should then 00118 * call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that 00119 * a new character can be sent. The protocol stack will then call 00120 * xMBPortSerialPutByte( ) to send the character. 00121 */ 00122 static void prvvUARTTxReadyISR( void ) 00123 { 00124 pxMBFrameCBTransmitterEmpty(); 00125 } 00126 00127 /* Create an interrupt handler for the receive interrupt for your target 00128 * processor. This function should then call pxMBFrameCBByteReceived( ). The 00129 * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the 00130 * character. 00131 */ 00132 static void prvvUARTRxISR( void ) 00133 { 00134 if(ser3.readable()) //stanlely RX ISR must contain getc 00135 grx_buf=ser3.getc(); 00136 00137 pxMBFrameCBByteReceived(); 00138 } 00139 00140
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