public PicoRV_SPI(Machine machine) : base(machine)
{
bbHelper = new BitBangHelper(8, loggingParent: this, outputMsbFirst: true);
var registers = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.Config1, new DoubleWordRegister(this)
.WithFlag(0, out var data0, FieldMode.Write, name: "data0")
.WithFlag(1, FieldMode.Write, name: "data1") // data 1-3 used in QSPI only
.WithFlag(2, FieldMode.Write, name: "data2")
.WithFlag(3, FieldMode.Write, name: "data3")
.WithFlag(4, out var clock, FieldMode.Write, name: "clk")
.WithFlag(5, out var chipSelectNegated, FieldMode.Write, name: "cs_n")
.WithReservedBits(6, 2)
.WithWriteCallback((_, val) =>
{
if (memioEnable.Value)
{
this.Log(LogLevel.Warning, "MEMIO mode not enabled - bit banging not supported in this mode");
return;
}
if (qspiEnable.Value)
{
this.Log(LogLevel.Warning, "QSPI mode not yet supported");
return;
}
if (RegisteredPeripheral == null)
{
this.Log(LogLevel.Warning, "Trying to send bytes over SPI, but there is no device attached");
return;
}
if (chipSelectNegated.Value && !previousChipSelectNegated)
{
this.Log(LogLevel.Noisy, "ChipSelect signal down - finishing the transmission");
RegisteredPeripheral.FinishTransmission();
bbHelper.ResetOutput();
}
previousChipSelectNegated = chipSelectNegated.Value;
// do not latch bits when MEMIO is enabled or chipSelect is not set
if (bbHelper.Update(clock.Value, data0.Value, !memioEnable.Value && !chipSelectNegated.Value))
{
this.Log(LogLevel.Noisy, "Sending byte 0x{0:X}", bbHelper.DecodedOutput);
var input = RegisteredPeripheral.Transmit((byte)bbHelper.DecodedOutput);
this.Log(LogLevel.Noisy, "Received byte 0x{0:X}", input);
bbHelper.SetInputBuffer(input);
}
}) },
public LiteX_SPI_Flash(Machine machine) : base(machine)
{
bbHelper = new BitBangHelper(8, loggingParent: this, outputMsbFirst: true);
var registers = new Dictionary <long, DoubleWordRegister>
{
{ (long)Registers.BitBang, new DoubleWordRegister(this)
.WithFlag(0, out var valueSignal, FieldMode.Write, name: "value")
.WithFlag(1, out var clockSignal, FieldMode.Write, name: "clk")
.WithFlag(2, out var chipSelectNegatedSignal, FieldMode.Write, name: "cs_n")
.WithFlag(3, out var dqInputSignal, FieldMode.Write, name: "dq_input")
.WithWriteCallback((_, val) =>
{
if (!bitBangEnabled.Value)
{
this.Log(LogLevel.Warning, "Write to not-enabled BitBang register ignored");
return;
}
if (RegisteredPeripheral == null)
{
this.Log(LogLevel.Warning, "Trying to send bytes over SPI, but there is no device attached");
return;
}
if (chipSelectNegatedSignal.Value && !previousChipSelectNegatedSignal)
{
this.Log(LogLevel.Noisy, "ChipSelect signal down - finishing the transmission");
RegisteredPeripheral.FinishTransmission();
}
previousChipSelectNegatedSignal = chipSelectNegatedSignal.Value;
// do not latch bits when dqInputSignal is set or chipSelect is not set
if (bbHelper.Update(clockSignal.Value, valueSignal.Value, !dqInputSignal.Value && !chipSelectNegatedSignal.Value))
{
this.Log(LogLevel.Noisy, "Sending byte 0x{0:X}", bbHelper.DecodedOutput);
var input = RegisteredPeripheral.Transmit((byte)bbHelper.DecodedOutput);
this.Log(LogLevel.Noisy, "Received byte 0x{0:X}", input);
bbHelper.SetInputBuffer(input);
}
}) },
public LiteX_Ethernet(Machine machine, int numberOfWriteSlots = 2, int numberOfReadSlots = 2) : base(machine)
{
Interlocked.Add(ref NumberOfInstances, 1);
MAC = MACAddress.Parse("10:e2:d5:00:00:00").Next(NumberOfInstances - 1);
writeSlots = new Slot[numberOfWriteSlots];
readSlots = new Slot[numberOfReadSlots];
for (var i = 0; i < numberOfWriteSlots; i++)
{
writeSlots[i] = new Slot();
}
for (var i = 0; i < numberOfReadSlots; i++)
{
readSlots[i] = new Slot();
}
bbHelper = new BitBangHelper(width: 16, loggingParent: this);
RegistersCollection = new DoubleWordRegisterCollection(this);
DefineRegisters();
}
