diff --git a/cores/validation/validation_I2C_RTC/build_as6/test.atsln b/cores/validation/validation_I2C_RTC/build_as6/test.atsln
new file mode 100644
index 0000000000000000000000000000000000000000..749e8031642f7e15c4630fbe5342fce033772a6c
--- /dev/null
+++ b/cores/validation/validation_I2C_RTC/build_as6/test.atsln
@@ -0,0 +1,20 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Atmel Studio Solution File, Format Version 11.00
+Project("{E66E83B9-2572-4076-B26E-6BE79FF3018A}") = "test", "test.cppproj", "{B3F859AD-E162-4C2F-9684-EAC6932FEC80}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|ARM = Debug|ARM
+ Release|ARM = Release|ARM
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {B3F859AD-E162-4C2F-9684-EAC6932FEC80}.Debug|ARM.ActiveCfg = Debug|ARM
+ {B3F859AD-E162-4C2F-9684-EAC6932FEC80}.Debug|ARM.Build.0 = Debug|ARM
+ {B3F859AD-E162-4C2F-9684-EAC6932FEC80}.Release|ARM.ActiveCfg = Release|ARM
+ {B3F859AD-E162-4C2F-9684-EAC6932FEC80}.Release|ARM.Build.0 = Release|ARM
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+EndGlobal
diff --git a/cores/validation/validation_I2C_RTC/build_as6/test.cppproj b/cores/validation/validation_I2C_RTC/build_as6/test.cppproj
new file mode 100644
index 0000000000000000000000000000000000000000..232d6310a1f636994e2474c8cbbd2539eb106ad9
--- /dev/null
+++ b/cores/validation/validation_I2C_RTC/build_as6/test.cppproj
@@ -0,0 +1,466 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+ <avrdeviceseries>none</avrdeviceseries>
+ <OutputType>Executable</OutputType>
+ <Language>CPP</Language>
+ <OutputFileName>$(MSBuildProjectName)</OutputFileName>
+ <OutputFileExtension>.elf</OutputFileExtension>
+ <OutputDirectory>$(MSBuildProjectDirectory)\$(Configuration)</OutputDirectory>
+ <AssemblyName>test</AssemblyName>
+ <Name>test</Name>
+ <RootNamespace>test</RootNamespace>
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+ <KeepTimersRunning>true</KeepTimersRunning>
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+ <ProgFlashFromRam>true</ProgFlashFromRam>
+ <RamSnippetAddress>0x20000000</RamSnippetAddress>
+ <UncachedRange />
+ <OverrideVtorValue>exception_table</OverrideVtorValue>
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+ <eraseonlaunchrule>1</eraseonlaunchrule>
+ <AsfFrameworkConfig>
+ <framework-data xmlns="">
+ <options />
+ <configurations />
+ <files />
+ <documentation help="" />
+ <offline-documentation help="" />
+ <dependencies>
+ <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.17.0" />
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+ </AsfFrameworkConfig>
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+ </com_atmel_avrdbg_tool_samice>
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+ <ToolNumber>ATML2320021800000012</ToolNumber>
+ <ToolName>EDBG</ToolName>
+ </com_atmel_avrdbg_tool_edbg>
+ </PropertyGroup>
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+ <ToolchainSettings>
+ <ArmGccCpp>
+ <armgcc.common.outputfiles.hex>True</armgcc.common.outputfiles.hex>
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+ <Value>../../../../../variants/arduino_zero</Value>
+ <Value>../../../../../libraries/SPI</Value>
+ <Value>../../../../../libraries/Wire</Value>
+ </ListValues>
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+ <Value>../../../../../variants/arduino_zero</Value>
+ <Value>../../../../../libraries/SPI</Value>
+ <Value>../../../../../libraries/Wire</Value>
+ </ListValues>
+ </armgcccpp.compiler.directories.IncludePaths>
+ <armgcccpp.compiler.optimization.level>Optimize (-O1)</armgcccpp.compiler.optimization.level>
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+ <armgcccpp.linker.miscellaneous.LinkerFlags>-Tflash.ld</armgcccpp.linker.miscellaneous.LinkerFlags>
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+ <ListValues>
+ <Value>../../../arduino</Value>
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+ </ToolchainSettings>
+ </PropertyGroup>
+ <ItemGroup>
+ <Folder Include="core" />
+ <Folder Include="Wire" />
+ <Folder Include="SPI" />
+ <Folder Include="variant" />
+ </ItemGroup>
+ <ItemGroup>
+ <Compile Include="..\..\..\..\libraries\SPI\SPI.cpp">
+ <SubType>compile</SubType>
+ <Link>SPI\SPI.cpp</Link>
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+ <SubType>compile</SubType>
+ <Link>SPI\SPI.h</Link>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
+ <Link>Wire\Wire.h</Link>
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+ <Compile Include="..\..\..\..\variants\arduino_zero\pins_arduino.h">
+ <SubType>compile</SubType>
+ <Link>variant\pins_arduino.h</Link>
+ </Compile>
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+ <SubType>compile</SubType>
+ <Link>variant\variant.cpp</Link>
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+ <SubType>compile</SubType>
+ <Link>variant\variant.h</Link>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
+ <Link>core\RingBuffer.h</Link>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
+ <Link>core\WInterrupts.h</Link>
+ </Compile>
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+ <SubType>compile</SubType>
+ <Link>core\wiring.c</Link>
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+ <SubType>compile</SubType>
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+ <Compile Include="..\..\..\arduino\wiring_analog.c">
+ <SubType>compile</SubType>
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+ </Compile>
+ <Compile Include="..\..\..\arduino\wiring_analog.h">
+ <SubType>compile</SubType>
+ <Link>core\wiring_analog.h</Link>
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+ <Compile Include="..\..\..\arduino\wiring_constants.h">
+ <SubType>compile</SubType>
+ <Link>core\wiring_constants.h</Link>
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+ <Compile Include="..\..\..\arduino\wiring_digital.c">
+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
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+ <SubType>compile</SubType>
+ <Link>core\wiring_shift.h</Link>
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+ <SubType>compile</SubType>
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+ <Compile Include="..\test.cpp">
+ <SubType>compile</SubType>
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+ <Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
+</Project>
\ No newline at end of file
diff --git a/cores/validation/validation_I2C_RTC/test.cpp b/cores/validation/validation_I2C_RTC/test.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5648e728911d4f6992e6da4bc7f6d00a674d2385
--- /dev/null
+++ b/cores/validation/validation_I2C_RTC/test.cpp
@@ -0,0 +1,82 @@
+#include "Arduino.h"
+#include <Wire.h>
+
+const uint8_t address = 0x68;
+
+uint8_t decToBcd(byte val)
+{
+ return ( (val/10*16) + (val%10) );
+}
+
+// Convert binary coded decimal to normal decimal numbers
+uint8_t bcdToDec(byte val)
+{
+ return ( (val/16*10) + (val%16) );
+}
+
+void setup()
+{
+ Serial5.begin(9600);
+ Serial5.println("Wire init");
+ Wire.begin();
+
+ // Setting the date
+ /*
+ Wire.beginTransmission(address);
+ Wire.write((uint8_t)0x00); // Init register
+
+ Wire.write(decToBcd(0)); // Second
+ Wire.write(decToBcd(39)); // Minute
+ Wire.write(decToBcd(11)); // Hours
+
+ Wire.write(decToBcd(4)); // Day of week
+
+ Wire.write(decToBcd(21)); // Day of Month
+ Wire.write(decToBcd(5)); // Month
+ Wire.write(decToBcd(14)); // Year
+ Wire.endTransmission();
+ */
+}
+
+void loop()
+{
+
+ Wire.beginTransmission(address);
+ Wire.write((uint8_t)0x3F);
+ Wire.endTransmission();
+
+ delay(10);
+
+ Wire.requestFrom(address, 7);
+/* while(Wire.available())
+ {
+ Serial5.print(bcdToDec(Wire.read()));
+ Serial5.print(" ");
+ }
+ Serial5.println();*/
+
+
+ int second = bcdToDec(Wire.read() & 0x7f);
+ int minute = bcdToDec(Wire.read());
+ int hour = bcdToDec(Wire.read() & 0x3f); // Need to change this if 12 hour am/pm
+ int dayOfWeek = bcdToDec(Wire.read());
+ int dayOfMonth = bcdToDec(Wire.read());
+ int month = bcdToDec(Wire.read());
+ int year = bcdToDec(Wire.read());
+
+ Serial5.print(hour, DEC);
+ Serial5.print(":");
+ Serial5.print(minute, DEC);
+ Serial5.print(":");
+ Serial5.print(second, DEC);
+ Serial5.print(" ");
+ Serial5.print(month, DEC);
+ Serial5.print("/");
+ Serial5.print(dayOfMonth, DEC);
+ Serial5.print("/");
+ Serial5.print(year,DEC);
+ Serial5.print(" ");
+ Serial5.println();
+
+ delay(990);
+}
diff --git a/libraries/Wire/Wire.cpp b/libraries/Wire/Wire.cpp
index 7c0a53427f34117ac85f072ff3a10d0a9149438d..9ab0d25a182a2a8b146ccf1f8d03cb3f0fb48cc5 100644
--- a/libraries/Wire/Wire.cpp
+++ b/libraries/Wire/Wire.cpp
@@ -50,28 +50,28 @@ void TwoWire::begin(uint8_t address) {
uint8_t TwoWire::requestFrom(uint8_t address, size_t quantity, bool stopBit)
{
- size_t toRead = quantity;
+ size_t toRead = quantity + 1;
if(sercom->startTransmissionWIRE(address, WIRE_READ_FLAG))
{
// Connected to slave
while(toRead--)
+ //for(toRead = quantity; toRead >= 0; --toRead)
{
- if( toRead == 0)
+ if( toRead == 0) // Stop transmission
{
- sercom->prepareNackBitWIRE();
+ sercom->prepareNackBitWIRE(); // Prepare NACK to stop slave transmission
+ sercom->readDataWIRE(); // Clear data register to send NACK
+ sercom->prepareCommandBitsWire(WIRE_MASTER_ACT_STOP); // Send Stop
}
- else
+ else // Continue transmission
{
- sercom->prepareAckBitWIRE();
- sercom->prepareCommandBitsWire(WIRE_MASTER_ACT_READ);
+ sercom->prepareAckBitWIRE(); // Prepare Acknowledge
+ sercom->prepareCommandBitsWire(WIRE_MASTER_ACT_READ); // Prepare the ACK command for the slave
+ rxBuffer.store_char( sercom->readDataWIRE() ); // Read data and send the ACK
}
-
- rxBuffer.store_char( sercom->readDataWIRE() );
}
}
-
- sercom->prepareCommandBitsWire(WIRE_MASTER_ACT_STOP);
return quantity - toRead;
}