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https://github.com/ckaczor/OneWireAPI.git
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File and class renaming
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262
DeviceFamily26.cs
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262
DeviceFamily26.cs
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namespace OneWireAPI
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{
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public class DeviceFamily26 : Device
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{
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public DeviceFamily26(Session session, short[] id)
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: base(session, id)
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{
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// Just call the base constructor
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}
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public enum VoltageType : short
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{
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Supply,
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Output
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}
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private double GetVoltage(VoltageType type)
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{
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short busy;
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// Select and access the ID of the device we want to talk to
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Adapter.Select(DeviceId);
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// Data buffer to send over the network
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var data = new byte[30];
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// How many bytes of data to send
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short dataCount = 0;
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// Set the command to recall the status/configuration page to the scratchpad
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data[dataCount++] = 0xB8;
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// Set the page number to recall
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data[dataCount++] = 0x00;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Clear the data count
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dataCount = 0;
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// Access the device we want to talk to
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Adapter.Access();
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// Set the command to read the scratchpad
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data[dataCount++] = 0xBE;
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// Set the page number to read
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data[dataCount++] = 0x00;
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// Add 9 bytes to be read - 8 for the data and 1 for the CRC
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for (var index = 0; index < 9; index++)
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data[dataCount++] = 0xFF;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Calculate the CRC of the scratchpad data
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var crc = Crc8.Calculate(data, 2, 9);
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// If the CRC doesn't match then throw an exception
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if (crc != data[10])
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{
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// Throw a CRC exception
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throw new OneWireException(OneWireException.ExceptionFunction.Crc, DeviceId);
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}
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// TODO - Check if we really need to change the input selector
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if (true)
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{
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// Access the device we want to talk to
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Adapter.Access();
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// Reset the data count
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dataCount = 0;
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// Set the command to write the scratchpad
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data[dataCount++] = 0x4E;
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// Set the page number to write
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data[dataCount++] = 0x00;
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// Set or clear the AD bit based on the type requested
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if (type == VoltageType.Supply)
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data[dataCount++] = (byte) (data[2] | 0x08);
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else
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data[dataCount++] = (byte) (data[2] & 0xF7);
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// Move the existing data down in the array
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for (var index = 0; index < 7; index++)
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data[dataCount++] = data[index + 4];
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Reset the data count
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dataCount = 0;
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// Access the device we want to talk to
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Adapter.Access();
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// Set the command to copy the scratchpad
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data[dataCount++] = 0x48;
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// Set the page number to copy to
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data[dataCount++] = 0x00;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Loop until the data copy is complete
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do
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{
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busy = Adapter.ReadByte();
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}
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while (busy == 0);
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}
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// Access the device we want to talk to
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Adapter.Access();
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// Send the voltage conversion command
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Adapter.SendByte(0xB4);
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// Loop until conversion is complete
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do
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{
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busy = Adapter.ReadByte();
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}
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while (busy == 0);
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// Clear the data count
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dataCount = 0;
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// Set the command to recall the status/configuration page to the scratchpad
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data[dataCount++] = 0xB8;
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// Set the page number to recall
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data[dataCount++] = 0x00;
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// Access the device we want to talk to
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Adapter.Access();
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Clear the data count
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dataCount = 0;
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// Access the device we want to talk to
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Adapter.Access();
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// Set the command to read the scratchpad
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data[dataCount++] = 0xBE;
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// Set the page number to read
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data[dataCount++] = 0x00;
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// Add 9 bytes to be read - 8 for the data and 1 for the CRC
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for (var index = 0; index < 9; index++)
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data[dataCount++] = 0xFF;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Calculate the CRC of the scratchpad data
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crc = Crc8.Calculate(data, 2, 9);
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// If the CRC doesn't match then throw an exception
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if (crc != data[10])
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{
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// Throw a CRC exception
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throw new OneWireException(OneWireException.ExceptionFunction.Crc, DeviceId);
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}
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// Assemble the voltage data
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var dVoltage = (double) ((data[6] << 8) | data[5]);
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return dVoltage / 100;
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}
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public double GetSupplyVoltage()
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{
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return GetVoltage(VoltageType.Supply);
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}
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public double GetOutputVoltage()
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{
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return GetVoltage(VoltageType.Output);
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}
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public double GetTemperature()
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{
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// Select and access the ID of the device we want to talk to
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Adapter.Select(DeviceId);
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// Send the conversion command byte
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Adapter.SendByte(0x44);
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// Sleep while the data is converted
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System.Threading.Thread.Sleep(10);
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// Access the device we want to talk to
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Adapter.Access();
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// Data buffer to send over the network
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var data = new byte[30];
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// How many bytes of data to send
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short dataCount = 0;
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// Set the command to recall the status/configuration page to the scratchpad
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data[dataCount++] = 0xB8;
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// Set the page number to recall
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data[dataCount++] = 0x00;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Clear the data count
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dataCount = 0;
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// Access the device we want to talk to
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Adapter.Access();
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// Set the command to read the scratchpad
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data[dataCount++] = 0xBE;
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// Set the page number to read
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data[dataCount++] = 0x00;
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// Add 9 bytes to be read - 8 for the data and 1 for the CRC
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for (var iIndex = 0; iIndex < 9; iIndex++)
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data[dataCount++] = 0xFF;
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// Send the data block
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Adapter.SendBlock(data, dataCount);
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// Calculate the CRC of the scratchpad data
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var crc = Crc8.Calculate(data, 2, 9);
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// If the CRC doesn't match then throw an exception
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if (crc != data[10])
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{
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// Throw a CRC exception
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throw new OneWireException(OneWireException.ExceptionFunction.Crc, DeviceId);
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}
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// Get the two bytes of temperature data
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int temperatureLsb = data[3];
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int temperatureMsb = data[4];
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// Shift the data into the right order
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var iTemperature = ((temperatureMsb << 8) | temperatureLsb) >> 3;
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// Return the temperature
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return iTemperature * 0.03125F;
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}
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}
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}
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