Diff: mbedlnk.cpp

Revision:

0:1193dbfe28e2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbedlnk.cpp	Thu Mar 24 17:21:29 2011 +0000
@@ -0,0 +1,493 @@
+//---------------------------------------------------------------------------
+// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
+// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Except as contained in this notice, the name of Dallas Semiconductor
+// shall not be used except as stated in the Dallas Semiconductor
+// Branding Policy.
+//---------------------------------------------------------------------------
+//
+//  TODO.C - COM functions required to communicate with the DS2480 based
+//           Universal Serial Adapter 'U'.  Fill in the platform specific code.
+//
+//  Version: 2.00
+//
+//  History: 1.00 -> 1.01  Added function msDelay.
+//
+//           1.01 -> 1.02  Changed to generic OpenCOM/CloseCOM for easier
+//                         use with other platforms.
+//
+//           1.02 -> 1.03  Removed caps in #includes for Linux capatibility
+//                         Add function msGettick()
+//           1.03 -> 2.00  Changed 'MLan' to 'ow'. Added support for
+//                         multiple ports.
+//           2.00 -> 2.10  some changes made as to allow MBED usage and multiple ports
+//
+//                         work to be done, evaluate functions at been removed / flagged
+//                         as text if migrate to mbed is meaningfull / needed
+//
+
+//#include "onewire_config.h"   // missing include file, handled locally now
+
+#include "ownet.h"
+#include "mbed.h"
+#include <string> 
+using namespace std;
+
+#define ONEWIRE_TX p9
+#define ONEWIRE_RX p10
+
+Serial com1( ONEWIRE_TX , ONEWIRE_RX );  // uart 1 = p13_p14, tx, rx 
+Serial com2( ONEWIRE_TX , ONEWIRE_RX );  // uart 2 = p28_p27, tx, rx
+Serial com3( ONEWIRE_TX , ONEWIRE_RX );  // uart 3 = p9_p10,  tx, rx
+
+// exportable functions required
+SMALLINT OpenCOM(int,char *);
+SMALLINT WriteCOM(int,int,uchar *);
+void     FlushCOM(int);
+int      ReadCOM(int,int,uchar *);
+void     BreakCOM(int);
+void     SetBaudCOM(int,int);
+void     CloseCOM(int);
+long     msGettick(void);
+void     msDelay(int);
+SMALLINT owHasPowerDelivery(int);
+SMALLINT owHasOverDrive(int);
+SMALLINT owHasProgramPulse(int);
+SMALLINT owWriteBytePower(int,SMALLINT);
+SMALLINT owReadBitPower(int,SMALLINT);
+
+
+//---------------------------------------------------------------------------
+// Attempt to open a com port.  Keep the handle in ComID.
+// Set the starting baud rate to 9600.
+//
+// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number provided will
+//               be used to indicate the port number desired when calling
+//               all other functions in this library.
+//
+// 'port_zstr' - zero terminate port name.  For this platform
+//               use format COMX where X is the port number.
+//               NOTE: not being used by MBED
+//
+//
+// Returns: TRUE(1)  - success, COM port opened
+//          FALSE(0) - failure, could not open specified port
+//
+SMALLINT OpenCOM(int portnum, char *port_zstr) {
+
+    switch (portnum) {
+        case 1:
+            com1.baud( 9600);
+            break;
+        case 2:
+            com2.baud( 9600);
+            break;
+        case 3:
+            com3.baud( 9600);
+            break;
+        default:
+            return 0;
+    }
+    return 1;
+}
+
+//---------------------------------------------------------------------------
+// Attempt to open a com port.  Keep the handle in ComID.
+// Set the starting baud rate to 9600.
+//
+// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number provided will
+//               be used to indicate the port number desired when calling
+//               all other functions in this library.
+//
+//
+// Returns: the port number if it was successful otherwise -1
+//
+int OpenCOMEx(char *port_zstr) {
+
+    int portnum = -1;
+
+    if ( port_zstr[0] == '1') {
+        portnum = 1;
+    }
+        
+    if ( port_zstr[0] == '2') {
+        portnum = 2;
+    }
+
+    if ( port_zstr[0] == '3') {
+        portnum = 3;
+    }    
+
+    if(!OpenCOM(portnum, port_zstr)) {
+        return -1;
+    }
+    return portnum;
+}
+
+//---------------------------------------------------------------------------
+// Closes the connection to the port.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+//
+void CloseCOM(int portnum) {
+   // no need to implement, mbed doesn't support close !
+}
+
+//---------------------------------------------------------------------------
+// Flush the rx and tx buffers
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+//
+void FlushCOM(int portnum) {
+
+    switch (portnum) {
+        case 1:
+            // Flush TX & RX FIFO buffer
+            LPC_UART1->FCR |= 0x06;
+            break;
+        case 2:
+            // Flush TX & RX FIFO buffer
+            LPC_UART2->FCR |= 0x06;
+            break;
+        case 3:
+            // Flush TX & RX FIFO buffer
+            LPC_UART3->FCR |= 0x06;
+            break;
+    }
+}
+
+//--------------------------------------------------------------------------
+// Write an array of bytes to the COM port, verify that it was
+// sent out.  Assume that baud rate has been set.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+// 'outlen'   - number of bytes to write to COM port
+// 'outbuf'   - pointer ot an array of bytes to write
+//
+// Returns:  TRUE(1)  - success
+//           FALSE(0) - failure
+//
+SMALLINT WriteCOM(int portnum, int outlen, uchar *outbuf) {
+
+    //printf("port-%d\r\n",portnum);
+    for ( int x=0; x < outlen; x++ )
+    {
+        switch (portnum) {
+            case 1:
+                if (com1.writeable()) {
+                    com1.putc( outbuf[x]);
+                }
+                break;
+            case 2:
+                if (com2.writeable()) {
+                    com2.putc( outbuf[x]);
+                }
+                break;
+            case 3:
+                if (com3.writeable()) {
+                    com3.putc( outbuf[x]);
+                    //printf("idx-%d, char-%2x\r\n", x, outbuf[x]);
+                }
+                break;
+        }
+        wait_ms(1);
+    }
+
+    switch (portnum) {
+        case 1:
+            while ( (LPC_UART1->LSR & 0x40) == 0 ) {}
+            break;
+        case 2:
+            while ( (LPC_UART2->LSR & 0x40) == 0 ) {}
+            break;
+        case 3:
+            while ( (LPC_UART3->LSR & 0x40) == 0 ) {}
+            break;
+    }
+    return 1;
+}
+
+//--------------------------------------------------------------------------
+// Read an array of bytes from the COM port, verify that it was
+// received.  Assume that baud rate has been set.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//               OpenCOM to indicate the port number.
+// 'inlen'     - number of bytes to read from COM port
+// 'inbuf'     - pointer to a buffer to hold the incoming bytes
+//
+// Returns: number of characters read
+//
+int ReadCOM(int portnum, int inlen, unsigned char *inbuf) {
+
+    string buffer ("");
+    Timer t;
+    int numchar = 0;
+    int read =0;
+    
+    t.start();  // Start timeout timer
+
+    while ( t.read_ms() < 1000 )  {             // If we haven't timed out....
+        switch (portnum) {
+            case 1:
+                if (com1.readable()) {
+                    read = com1.getc();
+                    buffer += read;
+                    numchar++;
+                    t.reset(); 
+                }
+                break;
+            case 2:
+                if (com2.readable()) {
+                    read = com2.getc();
+                    buffer += read;
+                    numchar++;
+                    t.reset();
+                }
+                break;
+            case 3:
+                if (com3.readable()) {
+                    read = com3.getc();
+                    buffer += read;
+                    numchar++;
+                    t.reset();
+                }
+                break;
+        }
+
+        if (numchar == inlen)
+        {
+            break;  
+        }
+    }
+
+    buffer.copy( (char*)inbuf, numchar );
+   
+    return numchar;
+}
+
+//--------------------------------------------------------------------------
+// Send a break on the com port for at least 2 ms
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//               OpenCOM to indicate the port number.
+//
+void BreakCOM(int portnum) {
+    int BREAK_time = 2;
+
+    switch (portnum) {
+        case 1:
+            // Send Line Break
+            LPC_UART1->LCR |= 0x40;
+            wait_ms( BREAK_time );
+            // Mark after break        
+            LPC_UART1->LCR &= ~(0x40);
+            break;
+        case 2:
+            // Send Line Break
+            LPC_UART2->LCR |= 0x40;
+            wait_ms( BREAK_time );
+            // Mark after break        
+            LPC_UART2->LCR &= ~(0x40);
+            break;
+        case 3:
+            // Send Line Break
+            LPC_UART3->LCR |= 0x40;
+            wait_ms( BREAK_time );   
+            // Mark after break        
+            LPC_UART3->LCR &= ~(0x40);
+            break;
+        default:
+            break;
+    }
+    
+    wait_us( BREAK_time );
+}
+
+//--------------------------------------------------------------------------
+// Set the baud rate on the com port.
+//
+// 'portnum'   - number 0 to MAX_PORTNUM-1.  This number was provided to
+//               OpenCOM to indicate the port number.
+// 'new_baud'  - new baud rate defined as
+//                PARMSET_9600     0x00
+//                PARMSET_19200    0x02
+//                PARMSET_57600    0x04
+//                PARMSET_115200   0x06
+//
+void SetBaudCOM(int portnum, int new_baud) {
+
+    int baud_rate = 9600;
+    
+    switch (new_baud) {
+        case 0:
+            baud_rate = 9600;
+            break;
+        case 2:
+            baud_rate = 19200;
+            break;
+        case 4:
+            baud_rate = 57600;
+            break;
+         case 6:
+            baud_rate = 115200;
+            break;
+    }
+
+    switch (portnum) {
+
+        case 1:
+            com1.baud(baud_rate);
+            break;
+        case 2:
+            com2.baud(baud_rate);
+            break;
+        case 3:
+            com2.baud(baud_rate);
+            break;
+    }
+}
+
+//--------------------------------------------------------------------------
+//  Description:
+//     Delay for at least 'len' ms
+//
+void msDelay(int len)
+{
+    wait_ms( len );
+}
+
+//--------------------------------------------------------------------------
+// Get the current millisecond tick count.  Does not have to represent
+// an actual time, it just needs to be an incrementing timer.
+//
+long msGettick(void) {
+   // add platform specific code here
+   return 0;
+}
+
+/* from here onwards functions have been removed, further evaluation needed
+//--------------------------------------------------------------------------
+// This procedure indicates wether the adapter can deliver power.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+//
+// Returns:  TRUE  if adapter is capable of delivering power.
+//
+SMALLINT owHasPowerDelivery(int portnum) {
+
+   // add adapter specific code here
+   return TRUE;
+}
+
+//--------------------------------------------------------------------------
+// This procedure indicates wether the adapter can deliver power.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+//
+// Returns:  TRUE  if adapter is capable of over drive.
+//
+SMALLINT owHasOverDrive(int portnum) {
+
+   // add adapter specific code here
+   return TRUE;
+}
+
+//--------------------------------------------------------------------------
+// This procedure creates a fixed 480 microseconds 12 volt pulse
+// on the 1-Wire Net for programming EPROM iButtons.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+//
+// Returns:  TRUE  program volatage available
+//           FALSE program voltage not available
+SMALLINT owHasProgramPulse(int portnum)
+{
+   // add adapter specific code here
+   return TRUE;
+}
+
+
+//--------------------------------------------------------------------------
+// Send 8 bits of communication to the 1-Wire Net and verify that the
+// 8 bits read from the 1-Wire Net is the same (write operation).
+// The parameter 'sendbyte' least significant 8 bits are used.  After the
+// 8 bits are sent change the level of the 1-Wire net.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+// 'sendbyte' - 8 bits to send (least significant byte)
+//
+// Returns:  TRUE: bytes written and echo was the same
+//           FALSE: echo was not the same
+//
+SMALLINT owWriteBytePower(int portnum, SMALLINT sendbyte)
+{
+   // replace if platform has better implementation (faster response)
+   if (!owHasPowerDelivery(portnum))
+      return FALSE;
+
+   if(owTouchByte(portnum,sendbyte) != sendbyte)
+      return FALSE;
+
+   if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
+      return FALSE;
+
+   return TRUE;
+}
+
+
+//--------------------------------------------------------------------------
+// Send 1 bit of communication to the 1-Wire Net and verify that the
+// response matches the 'applyPowerResponse' bit and apply power delivery
+// to the 1-Wire net.  Note that some implementations may apply the power
+// first and then turn it off if the response is incorrect.
+//
+// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number was provided to
+//              OpenCOM to indicate the port number.
+// 'applyPowerResponse' - 1 bit response to check, if correct then start
+//                        power delivery
+//
+// Returns:  TRUE: bit written and response correct, strong pullup now on
+//           FALSE: response incorrect
+//
+SMALLINT owReadBitPower(int portnum, SMALLINT applyPowerResponse)
+{
+   // replace if platform has better implementation (faster response)
+   if (!owHasPowerDelivery(portnum))
+      return FALSE;
+
+   if(owTouchBit(portnum,0x01) != applyPowerResponse)
+      return FALSE;
+
+   if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
+      return FALSE;
+
+   return TRUE;
+}
+
+*/
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