98 lines
3.0 KiB
C#
98 lines
3.0 KiB
C#
//
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// Copyright (c) 2010 - 2019 Antmicro
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//
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// This file is licensed under the MIT License.
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// Full license text is available in 'licenses/MIT.txt'.
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//
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using System;
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using System.Linq;
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using Antmicro.Renode.Backends.Display;
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using Antmicro.Renode.Core;
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using Antmicro.Renode.Core.Structure.Registers;
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using Antmicro.Renode.Logging;
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using Antmicro.Renode.Peripherals.Bus;
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using Antmicro.Renode.Peripherals.Memory;
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using Antmicro.Renode.Utilities;
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namespace Antmicro.Renode.Peripherals.Video
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{
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public class fb : AutoRepaintingVideo, IDoubleWordPeripheral, IProvidesRegisterCollection<DoubleWordRegisterCollection>, IKnownSize
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{
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public fb(Machine machine) : base(machine)
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{
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this.machine = machine;
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RegistersCollection = new DoubleWordRegisterCollection(this);
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Reconfigure(336, 536, PixelFormat.RGB565, false);
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for (int i = 0; i < buffer.Length; i++) buffer[i] = 0;
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DoRepaint();
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DefineRegisters();
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Reset();
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}
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public void WriteDoubleWord(long address, uint value)
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{
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RegistersCollection.Write(address, value);
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}
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public uint ReadDoubleWord(long offset)
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{
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return RegistersCollection.Read(offset);
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}
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public override void Reset()
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{
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RegistersCollection.Reset();
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}
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public long Size { get{ return 0x800; }}
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public DoubleWordRegisterCollection RegistersCollection { get; private set; }
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protected override void Repaint()
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{
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var newbuf = new Byte[44*Height];
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machine.SystemBus.ReadBytes(bufferAddress, newbuf.Length, newbuf, 0);
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for (int y = 0; y < Height; y++) {
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if (!updateDirty || updateAll || ((newbuf[y*44+0x2a] & 0x1) == 0x1)) for (int x = 0; x < Width; x++) {
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if (((newbuf[((x+y*44*8))/8] >> (x%8))&1) > 0) {
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buffer[2*(x+y*Width)] = 0xFF;
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buffer[2*(x+y*Width)+1] = 0xFF;
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} else {
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buffer[2*(x+y*Width)] = 0x0;
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buffer[2*(x+y*Width)+1] = 0x0;
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}
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}
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}
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}
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private void DefineRegisters()
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{
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Registers.COMMAND.Define(this)
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.WithValueField(0, 32, writeCallback: (_, val) =>
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{
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updateDirty = (val & 0x1) == 0x1;
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updateAll = (val & 0x2) == 0x2;
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DoRepaint();
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})
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;
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Registers.BUSY.Define(this)
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.WithValueField(0, 32, valueProviderCallback: _ => { return 0; })
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;
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}
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private bool updateDirty = false;
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private bool updateAll = false;
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private uint bufferAddress = 0xB0000000;
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private readonly Machine machine;
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private enum Registers
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{
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COMMAND = 0x0,
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BUSY = 0x04
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}
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}
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}
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