public static void Write(this Eeprom93C46B eeprom, ushort address, ushort data)
{
eeprom.Pulse(false);
eeprom.Pulse(true);
address &= 0x3F;
for (int i = 0; i < 6; i++)
{
eeprom.Pulse(((address >> (5 - i) & 0x01) != 0x00));
}
for (int i = 0; i < 16; i++)
{
bool value = ((data >> (15 - i)) & 0x01) == 1;
eeprom.Pulse(value);
}
}
public static void DisableEraseWrite(this Eeprom93C46B eeprom)
{
// Opcode for EWDS is 0000XXXX
for (int i = 0; i < 8; i++)
{
eeprom.Pulse(false);
}
}
public static void EnableEraseWrite(this Eeprom93C46B eeprom)
{
// Opcode for EWEN is 0011XXXX
eeprom.Pulse(false);
eeprom.Pulse(false);
eeprom.Pulse(true);
eeprom.Pulse(true);
eeprom.Pulse(false);
eeprom.Pulse(false);
eeprom.Pulse(false);
eeprom.Pulse(false);
}
public static ushort Read(this Eeprom93C46B eeprom, ushort address)
{
eeprom.Pulse(true);
eeprom.Pulse(false);
address &= 0x3F;
for (int i = 0; i < 6; i++)
{
eeprom.Pulse(((address >> (5 - i) & 0x01) != 0x00));
}
ushort value = 0;
for (int i = 0; i < 16; i++)
{
eeprom.Pulse(false);
value |= (ushort)((eeprom.DO ? 1 : 0) << (15 - i));
}
return(value);
}
public static void WriteAll(this Eeprom93C46B eeprom, ushort data)
{
eeprom.Pulse(false);
eeprom.Pulse(false);
eeprom.Pulse(false);
eeprom.Pulse(true);
eeprom.Pulse(true);
eeprom.Pulse(true);
eeprom.Pulse(true);
eeprom.Pulse(true);
for (int i = 0; i < 16; i++)
{
bool value = ((data >> (15 - i)) & 0x01) == 1;
eeprom.Pulse(value);
}
}
public void Clocking8BitsShouldExecuteInstruction()
{
// Arrange
eeprom.Start();
eeprom.EnableEraseWrite();
eeprom.Start();
Instruction instruction = null;
eeprom.InstructionDone += (sender, args) => { instruction = args.ExecutedInstruction; };
// Act
for (int i = 0; i < 8; i++)
{
eeprom.Pulse(true);
}
// Assert
Assert.AreEqual <OperationState>(OperationState.Standby, eeprom.State,
"After 8 cycles state should change to Standby for ERASE.");
Assert.IsNotNull(instruction, "An instruction should have executed.");
Assert.AreEqual <Opcode>(Opcode.ERASE, instruction.Opcode, "ERASE should have executed.");
Assert.AreEqual <ushort>(0x3F, instruction.Address, "Address for instruction should be lower 6 bits at one.");
}
