274 lines
11 KiB
C#
274 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using Antmicro.Renode.Core;
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using Antmicro.Renode.Peripherals.Bus;
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using Antmicro.Renode.Logging;
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namespace Antmicro.Renode.Peripherals.Timers
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{
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public class Custom_RTC_R17V1 : IDoubleWordPeripheral, IKnownSize
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{
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// 寄存器偏移地址定义
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private const uint CMD_ADDR_OFFSET = 0x00000000; // 命令寄存器
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private const uint STATUS_ADDR_OFFSET = 0x00000004; // 状态寄存器
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private const uint US_LOW_ADDR_OFFSET = 0x00000008; // 微秒低位
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private const uint US_HIGH_ADDR_OFFSET = 0x0000000C; // 微秒高位
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private const uint SEC_LOW_ADDR_OFFSET = 0x00000010; // 秒低位
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private const uint SEC_HIGH_ADDR_OFFSET = 0x00000014; // 秒高位
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// 寄存器存储
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private readonly Dictionary<long, uint> registerMap;
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private readonly object lockObject = new object();
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private readonly uint baseAddress;
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// 时间相关变量
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private DateTime startTime;
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private ulong baseOffsetUs;
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private ulong baseOffsetSec;
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private bool isTimeLocked;
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private uint lockedUsLow;
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private uint lockedUsHigh;
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private uint lockedSecLow;
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private uint lockedSecHigh;
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public Custom_RTC_R17V1(IMachine machine)
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{
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baseAddress = 0x20800D80;
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registerMap = new Dictionary<long, uint>();
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// 设置启动时间对齐到整秒
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var now = DateTime.Now;
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startTime = new DateTime(now.Year, now.Month, now.Day,
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now.Hour, now.Minute, now.Second,
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DateTimeKind.Local);
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InitializeRegisters();
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LogInitializationInfo();
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}
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private void InitializeRegisters()
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{
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lock (lockObject)
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{
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// 初始化所有寄存器为0
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registerMap[CMD_ADDR_OFFSET] = 0x00000000;
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registerMap[STATUS_ADDR_OFFSET] = 0x00000000;
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registerMap[US_LOW_ADDR_OFFSET] = 0x00000000;
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registerMap[US_HIGH_ADDR_OFFSET] = 0x00000000;
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registerMap[SEC_LOW_ADDR_OFFSET] = 0x00000000;
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registerMap[SEC_HIGH_ADDR_OFFSET] = 0x00000000;
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baseOffsetUs = 0;
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baseOffsetSec = 0;
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isTimeLocked = false;
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lockedUsLow = 0;
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lockedUsHigh = 0;
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lockedSecLow = 0;
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lockedSecHigh = 0;
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}
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}
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private void LogInitializationInfo()
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{
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this.Log(LogLevel.Info, "==========================================");
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this.Log(LogLevel.Info, "RTC实时时钟初始化完成");
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this.Log(LogLevel.Info, "基地址: 0x{0:X8}", baseAddress);
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this.Log(LogLevel.Info, "6个寄存器，32位有效");
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this.Log(LogLevel.Info, "寄存器定义: CMD(写0xBB锁定时间), US_LOW+US_HIGH(微秒20位), SEC_LOW+SEC_HIGH(秒32位)");
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this.Log(LogLevel.Info, "启动时间已对齐到整秒: {0}", startTime.ToString("HH:mm:ss.fff"));
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this.Log(LogLevel.Info, "");
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this.Log(LogLevel.Info, "寄存器地址映射:");
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this.Log(LogLevel.Info, " CMD寄存器 : 地址0x{0:X8} (偏移0x00), 写入0xBB锁定时间", baseAddress + CMD_ADDR_OFFSET);
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this.Log(LogLevel.Info, " STATUS寄存器 : 地址0x{0:X8} (偏移0x04), 只读", baseAddress + STATUS_ADDR_OFFSET);
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this.Log(LogLevel.Info, " US_LOW寄存器 : 地址0x{0:X8} (偏移0x08), 微秒低16位", baseAddress + US_LOW_ADDR_OFFSET);
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this.Log(LogLevel.Info, " US_HIGH寄存器: 地址0x{0:X8} (偏移0x0C), 微秒高4位", baseAddress + US_HIGH_ADDR_OFFSET);
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this.Log(LogLevel.Info, " SEC_LOW寄存器: 地址0x{0:X8} (偏移0x10), 秒低16位", baseAddress + SEC_LOW_ADDR_OFFSET);
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this.Log(LogLevel.Info, " SEC_HIGH寄存器: 地址0x{0:X8} (偏移0x14), 秒高16位(读取后自动解锁)", baseAddress + SEC_HIGH_ADDR_OFFSET);
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this.Log(LogLevel.Info, "==========================================");
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}
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// 获取当前微秒值
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private uint GetCurrentMicrosecondsLow()
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{
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var elapsed = DateTime.Now - startTime;
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if (elapsed.TotalSeconds < 0)
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{
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this.Log(LogLevel.Error, "检测到系统时间回退！重置startTime");
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startTime = DateTime.Now;
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elapsed = TimeSpan.Zero;
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}
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double totalSeconds = elapsed.TotalSeconds + (double)baseOffsetSec;
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double fractionalSeconds = totalSeconds - Math.Floor(totalSeconds);
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ulong microseconds = (ulong)(fractionalSeconds * 1_000_000.0);
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if (microseconds >= 1_000_000)
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{
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microseconds = 999_999;
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}
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return (uint)(microseconds & 0xFFFF);
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}
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private uint GetCurrentMicrosecondsHigh()
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{
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var elapsed = DateTime.Now - startTime;
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if (elapsed.TotalSeconds < 0)
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{
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return 0;
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}
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double totalSeconds = elapsed.TotalSeconds + (double)baseOffsetSec;
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double fractionalSeconds = totalSeconds - Math.Floor(totalSeconds);
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ulong microseconds = (ulong)(fractionalSeconds * 1_000_000.0);
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if (microseconds >= 1_000_000)
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{
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microseconds = 999_999;
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}
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return (uint)((microseconds >> 16) & 0xF);
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}
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// 获取当前秒值
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private uint GetCurrentSecondsLow()
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{
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var elapsed = DateTime.Now - startTime;
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if (elapsed.TotalSeconds < 0)
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{
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return (uint)(baseOffsetSec & 0xFFFF);
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}
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ulong seconds = baseOffsetSec + (ulong)elapsed.TotalSeconds;
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return (uint)(seconds & 0xFFFF);
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}
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private uint GetCurrentSecondsHigh()
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{
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var elapsed = DateTime.Now - startTime;
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if (elapsed.TotalSeconds < 0)
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{
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return (uint)((baseOffsetSec >> 16) & 0xFFFF);
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}
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ulong seconds = baseOffsetSec + (ulong)elapsed.TotalSeconds;
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return (uint)((seconds >> 16) & 0xFFFF);
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}
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// 锁定时间
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private void LockTime()
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{
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lockedUsLow = GetCurrentMicrosecondsLow();
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lockedUsHigh = GetCurrentMicrosecondsHigh();
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lockedSecLow = GetCurrentSecondsLow();
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lockedSecHigh = GetCurrentSecondsHigh();
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isTimeLocked = true;
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this.Log(LogLevel.Debug, "时间已锁定: 微秒=0x{0:X4}{1:X4}, 秒=0x{2:X4}{3:X4}",
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lockedUsHigh, lockedUsLow, lockedSecHigh, lockedSecLow);
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}
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public uint ReadDoubleWord(long offset)
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{
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lock (lockObject)
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{
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uint fullAddress = baseAddress + (uint)offset;
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// 处理各个寄存器的读取
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if (offset == US_LOW_ADDR_OFFSET)
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{
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uint value = isTimeLocked ? lockedUsLow : GetCurrentMicrosecondsLow();
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this.Log(LogLevel.Info, "US_LOW读取: 地址0x{0:X8} (偏移0x08), 值0x{1:X4}",
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fullAddress, value);
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return value;
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}
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else if (offset == US_HIGH_ADDR_OFFSET)
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{
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uint value = isTimeLocked ? lockedUsHigh : GetCurrentMicrosecondsHigh();
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this.Log(LogLevel.Info, "US_HIGH读取: 地址0x{0:X8} (偏移0x0C), 值0x{1:X4}",
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fullAddress, value);
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return value;
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}
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else if (offset == SEC_LOW_ADDR_OFFSET)
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{
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uint value = isTimeLocked ? lockedSecLow : GetCurrentSecondsLow();
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this.Log(LogLevel.Info, "SEC_LOW读取: 地址0x{0:X8} (偏移0x10), 值0x{1:X4}",
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fullAddress, value);
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return value;
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}
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else if (offset == SEC_HIGH_ADDR_OFFSET)
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{
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uint value = isTimeLocked ? lockedSecHigh : GetCurrentSecondsHigh();
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this.Log(LogLevel.Info, "SEC_HIGH读取: 地址0x{0:X8} (偏移0x14), 值0x{1:X4}",
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fullAddress, value);
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// 读取SEC_HIGH后自动解锁
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if (isTimeLocked)
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{
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isTimeLocked = false;
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this.Log(LogLevel.Debug, "时间自动解锁（读取SEC_HIGH后）");
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}
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return value;
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}
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else if (offset == STATUS_ADDR_OFFSET)
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{
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uint value = 0; // 状态寄存器始终返回0
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this.Log(LogLevel.Info, "STATUS读取: 地址0x{0:X8} (偏移0x04), 值0x{1:X4}",
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fullAddress, value);
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return value;
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}
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this.Log(LogLevel.Warning, "尝试读取未定义的寄存器偏移: 0x{0:X8} (地址0x{1:X8})",
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offset, fullAddress);
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return 0;
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}
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}
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public void WriteDoubleWord(long offset, uint value)
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{
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lock (lockObject)
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{
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uint fullAddress = baseAddress + (uint)offset;
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// 只允许写入CMD寄存器
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if (offset == CMD_ADDR_OFFSET)
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{
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this.Log(LogLevel.Info, "CMD写入: 地址0x{0:X8} (偏移0x00), 值0x{1:X8}",
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fullAddress, value);
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if (value == 0xBB)
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{
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LockTime();
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this.Log(LogLevel.Info, "时间锁定命令已执行");
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}
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else
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{
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this.Log(LogLevel.Warning, "未知的CMD命令: 0x{0:X8}", value);
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}
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}
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else
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{
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this.Log(LogLevel.Warning, "尝试写入未定义的寄存器偏移: 0x{0:X8} (地址0x{1:X8}), 值0x{2:X8}",
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offset, fullAddress, value);
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}
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}
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}
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public void Reset()
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{
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lock (lockObject)
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{
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registerMap.Clear();
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InitializeRegisters();
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// 重置启动时间
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var now = DateTime.Now;
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startTime = new DateTime(now.Year, now.Month, now.Day,
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now.Hour, now.Minute, now.Second,
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DateTimeKind.Local);
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}
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this.Log(LogLevel.Info, "RTC (基地址0x{0:X8}) 已复位，时间重置", baseAddress);
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}
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public long Size => 0x80; // 4KB地址空间
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}
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} |