public void WriteDoubleWord(long offset, uint value)
{
switch ((Registers)offset)
{
case Registers.InterruptMask:
interruptMask = value;
break;
case Registers.EventMask:
eventMask = value;
break;
case Registers.RisingTriggerSelection:
risingTrigger = value;
break;
case Registers.FallingTriggerSelection:
fallingTrigger = value;
break;
case Registers.SoftwareInterruptEvent:
var allNewAndOld = softwareInterrupt | value;
var bitsToSet = allNewAndOld ^ softwareInterrupt;
BitHelper.ForeachActiveBit(bitsToSet, (x) =>
{
if (BitHelper.IsBitSet(interruptMask, x))
{
Connections[gpioMapping[x]].Set();
}
});
break;
case Registers.PendingRegister:
pending &= ~value;
softwareInterrupt &= ~value;
BitHelper.ForeachActiveBit(value, (x) =>
{
Connections[gpioMapping[x]].Unset();
});
break;
default:
this.LogUnhandledWrite(offset, value);
break;
}
}
private void DefineRegisters()
{
Registers.Request.Define(this)
.WithValueField(0, 10, FieldMode.Write, writeCallback: (_, value) => BitHelper.ForeachActiveBit(value, x => systemDma.InitTransfer(x, true)), name: "dma_req")
.WithReservedBits(11, 5)
.WithValueField(16, 10, FieldMode.Write, writeCallback: (_, value) => BitHelper.ForeachActiveBit(value, x => systemDma.InitTransfer(x, false)), name: "dma_req")
.WithReservedBits(27, 5)
;
Registers.Active.Define(this)
.WithValueField(0, 10, FieldMode.Read, name: "dma_active") //it always returns 0, as the transfer is instant. Keeping this field for possible future latching etc
.WithReservedBits(11, 21)
;
// this register is effectively a scratchpad
Registers.SramTimingAdjust.Define(this)
.WithReservedBits(0, 1)
.WithFlag(1, name: "sdma_sram_rme")
.WithValueField(2, 4, name: "sdma_sram_rm")
.WithReservedBits(6, 26)
;
}