Debian 3.9.10debian/3.9.10debian

1 files changed, 206 insertions, 0 deletions

diff --git a/src/pmdas/roomtemp/mlan/ds2480ut.c b/src/pmdas/roomtemp/mlan/ds2480ut.c
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+//---------------------------------------------------------------------------
+// Copyright (C) 1999 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. 
+//---------------------------------------------------------------------------
+//
+//  ds2480ut.c - DS2480 utility functions.
+//
+//  Version: 1.03
+//
+//  History: 1.00 -> 1.01  Default PDSRC changed from 0.83 to 1.37V/us
+//                         in DS2480Detect. Changed to use msDelay instead
+//                         of Delay.
+//
+//           1.01 -> 1.02  Changed global declarations from 'uchar' to 'int'.
+//                         Changed DSO/WORT from 7 to 10us in DS2480Detect.
+//
+//           1.02 -> 1.03  Removed caps in #includes for Linux capatibility
+
+#include "ds2480.h"
+#include "mlan.h"
+
+// external COM functions required
+extern void FlushCOM(void);
+extern int  WriteCOM(int, uchar *);
+extern int  ReadCOM(int, uchar *);
+extern void BreakCOM(void);
+//extern void SetBaudCOM(uchar);
+extern void msDelay(int);
+
+// exportable functions
+int DS2480Detect(void);
+int DS2480ChangeBaud(uchar);
+
+// global DS2480 state
+int UMode  = MODSEL_COMMAND; // current DS2480 command or data mode stateuchar
+int UBaud  = PARMSET_9600;   // current DS2480 baud rate
+int USpeed = SPEEDSEL_FLEX;  // current DS2480 MicroLAN communication speed
+int ULevel = MODE_NORMAL;    // current DS2480 MicroLAN level
+
+//---------------------------------------------------------------------------
+// Attempt to resyc and detect a DS2480
+//
+// Returns:  TRUE  - DS2480 detected successfully
+//           FALSE - Could not detect DS2480
+//
+int DS2480Detect(void)
+{
+   uchar sendpacket[10],readbuffer[10];
+   short sendlen=0;
+
+   // reset modes
+   UMode = MODSEL_COMMAND;
+   UBaud = PARMSET_9600;
+   USpeed = SPEEDSEL_FLEX;
+
+   // set the baud rate to 9600
+   SetBaudCOM((uchar)UBaud);
+
+   // send a break to reset the DS2480
+   BreakCOM();
+
+   // delay to let line settle 
+   msDelay(2);
+
+   // flush the buffers
+   FlushCOM();
+
+   // send the timing byte 
+   sendpacket[0] = 0xC1;
+   if (WriteCOM(1,sendpacket) != 1) 
+      return FALSE;
+
+   // set the FLEX configuration parameters
+   // default PDSRC = 1.37Vus
+   sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SLEW | PARMSET_Slew1p37Vus;
+   // default W1LT = 12us
+   sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_WRITE1LOW | PARMSET_Write12us;
+   // default DSO/WORT = 10us
+   sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_SAMPLEOFFSET | PARMSET_SampOff10us;
+
+   // construct the command to read the baud rate (to test command block) 
+   sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
+
+   // also do 1 bit operation (to test 1-Wire block)
+   sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_BIT | UBaud | BITPOL_ONE;
+
+   // flush the buffers
+   FlushCOM();                              
+   
+   // send the packet 
+   if (WriteCOM(sendlen,sendpacket)) 
+   {
+      // read back the response 
+      if (ReadCOM(5,readbuffer) == 5)
+      {    
+         // look at the baud rate and bit operation
+         // to see if the response makes sense
+         if (((readbuffer[3] & 0xF1) == 0x00) && 
+             ((readbuffer[3] & 0x0E) == UBaud) && 
+             ((readbuffer[4] & 0xF0) == 0x90) &&                
+             ((readbuffer[4] & 0x0C) == UBaud))  
+            return TRUE;
+      }
+   }
+
+   return FALSE;
+}
+
+
+//---------------------------------------------------------------------------
+// Change the DS2480 from the current baud rate to the new baud rate.
+//
+// 'newbaud' - the new baud rate to change to, defined as:
+//               PARMSET_9600     0x00
+//               PARMSET_19200    0x02
+//               PARMSET_57600    0x04
+//               PARMSET_115200   0x06
+//
+// Returns:  current DS2480 baud rate.
+//
+int DS2480ChangeBaud(uchar newbaud)
+{
+   int rt=FALSE;
+   uchar readbuffer[5],sendpacket[5],sendpacket2[5];
+   int sendlen=0,sendlen2=0;
+
+   // see if diffenent then current baud rate
+   if (UBaud == newbaud)
+      return TRUE;
+   else
+   {
+      // build the command packet
+      // check if correct mode 
+      if (UMode != MODSEL_COMMAND)
+      {
+         UMode = MODSEL_COMMAND;
+         sendpacket[sendlen++] = MODE_COMMAND;
+      }
+      // build the command 
+      sendpacket[sendlen++] = CMD_CONFIG | PARMSEL_BAUDRATE | newbaud;
+
+      // flush the buffers
+      FlushCOM();
+      
+      // send the packet 
+      if (!WriteCOM(sendlen,sendpacket)) 
+         rt = FALSE;
+      else
+      {
+         // make sure buffer is flushed
+         msDelay(5);
+
+         // change our baud rate
+         SetBaudCOM(newbaud);
+         UBaud = newbaud;
+
+         // wait for things to settle
+         msDelay(5);
+
+         // build a command packet to read back baud rate
+         sendpacket2[sendlen2++] = CMD_CONFIG | PARMSEL_PARMREAD | (PARMSEL_BAUDRATE >> 3);
+
+         // flush the buffers
+         FlushCOM();
+
+         // send the packet 
+         if (WriteCOM(sendlen2,sendpacket2)) 
+         {
+            // read back the 1 byte response 
+            if (ReadCOM(1,readbuffer) == 1)
+            {
+               // verify correct baud 
+               if (((readbuffer[0] & 0x0E) == (sendpacket[sendlen-1] & 0x0E)))
+                  rt = TRUE;
+            }
+         }
+      }
+   }
+
+   // if lost communication with DS2480 then reset 
+   if (rt != TRUE)
+      DS2480Detect();
+
+   return UBaud;
+}