Superseded by MaximInterface.

Diff: OneWire_Switches/DS2413/ds2413.cpp

Revision:

19:6d4c039a2d8e

Child:

20:ba60c076e92b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OneWire_Switches/DS2413/ds2413.cpp	Sun Mar 20 18:12:18 2016 -0700
@@ -0,0 +1,197 @@
+/******************************************************************//**
+* Copyright (C) 2016 Maxim Integrated Products, Inc., 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 MAXIM INTEGRATED 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 Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+
+#include "ds2413.h"
+
+
+//*********************************************************************
+Ds2413::Ds2413(OneWireInterface &owm): _owm(owm)
+{
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_read_chA(RomId &romId, uint8_t & val)
+{
+  Ds2413::CmdResult result = OpFailure;
+  
+  result = pio_access_read(romId, val);
+  
+  val = (val & 0x01);
+  
+  return result;
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_read_chB(RomId &romId, uint8_t & val)
+{
+  Ds2413::CmdResult result = OpFailure;
+  
+  result = pio_access_read(romId, val);
+  
+  val = ((val >> 2) & 0x01);
+  
+  return result;
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_write_chA(RomId &romId, uint8_t val)
+{
+  Ds2413::CmdResult result = OpFailure;
+  
+  uint8_t local_val = 0;
+  
+  //read current state of PIO
+  result = pio_access_read(romId, local_val);
+  
+  if(result == Ds2413::Success)
+  {
+    //modify
+    //current state of pioB OR
+    //desired state of pioA OR
+    //bits[7:2] should all be 1, per datasheet
+    val = (0xFC | ((local_val & 0x02) | (0x01 & val)));
+    
+    //write, bit[1:0] new state of pio
+    result = pio_access_write(romId, val);
+  }
+  
+  return result;
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_write_chB(RomId &romId, uint8_t val)
+{
+  Ds2413::CmdResult result = OpFailure;
+  
+  uint8_t local_val = 0;
+  
+  //read current state of PIO
+  result = pio_access_read(romId, local_val);
+  
+  if(result == Ds2413::Success)
+  {
+    //modify
+    //current state of pioA OR
+    //desired state of pioB OR
+    //bits[7:2] should all be 1, per datasheet
+    val = (0xFC | ((local_val & 0x01) | (0x02 & (val << 1))));
+    
+    //write, bit[1:0] new state of pio
+    result = pio_access_write(romId, val);
+  }
+  
+  return result;
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_read(RomId &romId, uint8_t & val)
+{
+  Ds2413::CmdResult result = Ds2413::OpFailure;
+  
+  OneWireInterface::CmdResult ow_result = _owm.OWMatchROM(romId);
+  
+  if(ow_result == OneWireInterface::Success)
+  {
+    ow_result = _owm.OWWriteByte(Ds2413::PIO_ACCESS_READ);
+    
+    if(ow_result == OneWireInterface::Success)
+    {
+      ow_result = _owm.OWReadByte(val);
+      
+      if(ow_result == OneWireInterface::Success)
+      {
+        result = Ds2413::Success;
+      }
+      else
+      {
+        result = Ds2413::CommsReadError;
+      }
+    }
+    else
+    {
+      result = Ds2413::CommsWriteError;
+    }
+  }
+  
+  return result;
+}
+
+
+//*********************************************************************
+Ds2413::CmdResult Ds2413::pio_access_write(RomId &romId, uint8_t val)
+{
+  Ds2413::CmdResult result = Ds2413::OpFailure;
+  
+  OneWireInterface::CmdResult ow_result = _owm.OWMatchROM(romId);
+  
+  if(ow_result == OneWireInterface::Success)
+  {
+    uint8_t send_block[] = {Ds2413::PIO_ACCESS_WRITE, val, ~val};
+    
+    ow_result = _owm.OWWriteBlock(send_block, 3);
+    if(ow_result == OneWireInterface::Success)
+    {
+      uint8_t expected_status = ((0x01 & val) | ((0x01 & val) << 1) | 
+                                ((0x02 & val) << 1) | ((0x02 & val) << 2));
+      expected_status |= (~expected_status << 4);
+      
+      uint8_t rcv_block[2];
+      ow_result = _owm.OWReadBlock(rcv_block, 2);
+      
+      if(ow_result == OneWireInterface::Success)
+      {
+        printf("\nexpected_status = 0x%2x\n", expected_status);
+        printf("\nrcv_block[1] = 0x%2x\n", rcv_block[1]);
+        if((rcv_block[0] == 0xAA) && (rcv_block[1] == expected_status))
+        {
+          result = Ds2413::Success;
+        }
+      }
+      else
+      {
+        result = Ds2413::CommsReadError;
+      }
+    }
+    else
+    {
+      result = Ds2413::CommsWriteError;
+    }
+  }
+  
+  return result;
+}