Diff: Devices/DS2413.cpp

Revision:

0:f77ad7f72d04

Child:

6:a8c83a2e6fa4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Devices/DS2413.cpp	Mon Nov 06 14:39:18 2017 -0600
@@ -0,0 +1,127 @@
+/*******************************************************************************
+* Copyright (C) 2017 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 <MaximInterface/Links/OneWireMaster.hpp>
+#include <MaximInterface/Utilities/Error.hpp>
+#include "DS2413.hpp"
+
+namespace MaximInterface {
+
+error_code DS2413::readStatus(Status & status) const {
+  uint_least8_t val;
+  const error_code result = pioAccessRead(val);
+  if (!result) {
+    status.pioAInputState = (val & 0x1) == 0x1;
+    status.pioAOutputState = (val & 0x2) == 0x2;
+    status.pioBInputState = (val & 0x4) == 0x4;
+    status.pioBOutputState = (val & 0x8) == 0x8;
+  }
+  return result;
+}
+
+error_code DS2413::writeOutputState(bool pioAState, bool pioBState) {
+  uint_least8_t val = 0xFC;
+  if (pioAState) {
+    val |= 0x1;
+  }
+  if (pioBState) {
+    val |= 0x2;
+  }
+  return pioAccessWrite(val);
+}
+
+error_code DS2413::pioAccessRead(uint_least8_t & val) const {
+  error_code result = selectRom(*master);
+  if (!result) {
+    result = master->writeByte(0xF5);
+    if (!result) {
+      result = master->readByte(val);
+      if (!result && (val != ((val ^ 0xF0) >> 4))) {
+        result = make_error_code(CommunicationError);
+      }
+    }
+  }
+  return result;
+}
+
+error_code DS2413::pioAccessWrite(uint_least8_t val) {
+  error_code result = selectRom(*master);
+  if (!result) {
+    uint_least8_t block[] = {0x5A, val, static_cast<uint_least8_t>(val ^ 0xFF)};
+    result = master->writeBlock(block, sizeof(block) / sizeof(block[0]));
+    if (!result) {
+      result = master->readByte(block[0]);
+      if (!result && block[0] != 0xAA) {
+        result = make_error_code(CommunicationError);
+      }
+    }
+  }
+  return result;
+}
+
+const error_category & DS2413::errorCategory() {
+  static class : public error_category {
+  public:
+    virtual const char * name() const { return "DS2413"; }
+
+    virtual std::string message(int condition) const {
+      switch (condition) {
+      case CommunicationError:
+        return "Communication Error";
+
+      default:
+        return defaultErrorMessage(condition);
+      }
+    }
+  } instance;
+  return instance;
+}
+
+error_code writePioAOutputState(DS2413 & ds2413, bool pioAState) {
+  DS2413::Status status;
+  error_code result = ds2413.readStatus(status);
+  if (!result && pioAState != status.pioAOutputState) {
+    result = ds2413.writeOutputState(pioAState, status.pioBOutputState);
+  }
+  return result;
+}
+
+error_code writePioBOutputState(DS2413 & ds2413, bool pioBState) {
+  DS2413::Status status;
+  error_code result = ds2413.readStatus(status);
+  if (!result && pioBState != status.pioBOutputState) {
+    result = ds2413.writeOutputState(status.pioAOutputState, pioBState);
+  }
+  return result;
+}
+
+} // namespace MaximInterface