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更新 SJA1000_CAN.cs

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This commit is contained in:
yaomingjun
2026-05-25 15:33:24 +08:00
parent 1bad9fd8ce
commit d07b18df57
1 changed files with 276 additions and 268 deletions
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544
SJA1000_CAN.cs
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@@ -1,12 +1,15 @@
//
// SJA1000 CAN 控制器外设实现（简化版，支持发送/接收队列，提高速率）
// SJA1000 CAN 控制器外设实现（简化版，支持发送/接收队列，可配置长度）
// 仅支持 PeliCAN 模式的标准帧，不考虑 BasicCAN、扩展帧、错误处理、多帧、验收滤波和发送中断。
// 寄存器地址映射基于 PeliCAN 模式，包含 MOD, CMR, SR, IR, IER, BTR0, BTR1, OCR, RXERR, TXERR,
// 发送缓冲区（地址 16-26）、RBSA 和 CDR。命令寄存器位2=RRB，位3=CDO。
// 接收为单帧，无 FIFO，无数据溢出处理。
// 所有寄存器可随时读写，无复位模式限制。
//
// author: Generated based on UART16550 template
// 队列长度可通过修改静态字段 MaxTxQueueSize 和 MaxRxQueueSize 调整。
// 发送队列满时，CPU 发送请求被忽略，并设置 TBS=0（发送缓冲区忙）；
// 接收队列满时，外部注入的新帧被丢弃。
//
// 日志开关：EnableVerboseLog = false 可关闭所有日志输出。
//
using System;
@@ -25,6 +28,13 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
/// </summary>
public class SJA1000_CAN : IDoubleWordPeripheral, IBytePeripheral, IKnownSize
{
// 日志开关（设置为 false 可屏蔽所有日志）
public static bool EnableVerboseLog = false;
// 队列长度配置（可修改）
public static int MaxTxQueueSize = 64; // 发送队列最大帧数
public static int MaxRxQueueSize = 64; // 接收队列最大帧数
public SJA1000_CAN(IMachine machine)
{
this.machine = machine;
@@ -32,8 +42,8 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
txBuffer = new byte[11];
rxBuffer = new byte[11];
txFrameQueue = new Queue<byte[]>(); // 新增：发送队列
rxFrameQueue = new Queue<byte[]>(); // 新增：接收队列
txFrameQueue = new Queue<byte[]>(); // 发送队列
rxFrameQueue = new Queue<byte[]>(); // 接收队列
Reset();
}
@@ -56,12 +66,14 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
Array.Clear(txBuffer, 0, txBuffer.Length);
Array.Clear(rxBuffer, 0, rxBuffer.Length);
txFrameQueue.Clear(); // 清空发送队列
rxFrameQueue.Clear(); // 清空接收队列
txFrameQueue.Clear();
rxFrameQueue.Clear();
lastInterruptState = false; // 重置中断边沿状态
UpdateInterrupts();
this.Log(LogLevel.Info, "SJA1000 CAN controller reset (simplified)");
if (EnableVerboseLog)
this.Log(LogLevel.Info, $"SJA1000 CAN controller reset (txQueueMax={MaxTxQueueSize}, rxQueueMax={MaxRxQueueSize})");
}
// ================ IBusPeripheral 接口实现 ================
@@ -79,269 +91,260 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
public byte ReadByte(long offset)
{
byte value = 0;
switch ((Registers)offset)
lock (lockObject)
{
case Registers.MOD:
value = mod;
this.Log(LogLevel.Info, "Read MOD: 0x{0:X2}", value);
break;
switch ((Registers)offset)
{
case Registers.MOD:
value = mod;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read MOD: 0x{0:X2}", value);
break;
case Registers.CMR:
// 命令寄存器只写，读返回0
this.Log(LogLevel.Info, "Read CMR (always 0)");
value = 0;
break;
case Registers.CMR:
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read CMR (always 0)");
value = 0;
break;
case Registers.SR:
value = (byte)((sr_tbs << 2) | sr_rbs); // BS 恒为0
this.Log(LogLevel.Info, "Read SR: TBS={0}, RBS={1} -> 0x{2:X2}", sr_tbs, sr_rbs, value);
break;
case Registers.SR:
value = (byte)((sr_tbs << 2) | sr_rbs); // BS 恒为0
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read SR: TBS={0}, RBS={1} -> 0x{2:X2}", sr_tbs, sr_rbs, value);
break;
case Registers.IR:
value = ir;
// 读 IR 后清零，但需要根据当前 RBS 重新评估 RI（电平触发）
ir = 0;
UpdateIrFromRbs();
UpdateInterrupts();
this.Log(LogLevel.Info, "Read IR: 0x{0:X2}, cleared", value);
break;
case Registers.IR:
value = ir;
ir = 0;
UpdateIrFromRbs();
// 中断被软件清除，重置边沿检测状态，允许下次条件满足时再次触发中断
lastInterruptState = false;
UpdateInterrupts();
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read IR: 0x{0:X2}, cleared", value);
break;
case Registers.IER:
value = ier;
this.Log(LogLevel.Info, "Read IER: 0x{0:X2}", value);
break;
case Registers.IER:
value = ier;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read IER: 0x{0:X2}", value);
break;
case Registers.BTR0:
value = btr0;
break;
case Registers.BTR1:
value = btr1;
break;
case Registers.OCR:
value = ocr;
break;
case Registers.RXERR:
value = rxerr;
break;
case Registers.TXERR:
value = txerr;
break;
case Registers.RBSA:
value = rbsa;
break;
case Registers.CDR:
value = cdr;
break;
case Registers.BTR0:
value = btr0;
break;
case Registers.BTR1:
value = btr1;
break;
case Registers.OCR:
value = ocr;
break;
case Registers.RXERR:
value = rxerr;
break;
case Registers.TXERR:
value = txerr;
break;
case Registers.RBSA:
value = rbsa;
break;
case Registers.CDR:
value = cdr;
break;
// 发送/接收缓冲区地址 16-26
case Registers.TX_FRAME_INFO:
case Registers.TX_ID1:
case Registers.TX_ID2:
case Registers.TX_DATA1:
case Registers.TX_DATA2:
case Registers.TX_DATA3:
case Registers.TX_DATA4:
case Registers.TX_DATA5:
case Registers.TX_DATA6:
case Registers.TX_DATA7:
case Registers.TX_DATA8:
int bufIndex = (int)(offset - (long)Registers.TX_FRAME_INFO);
if (sr_rbs == 1)
{
// 接收缓冲区有数据时，读返回接收帧的内容
value = rxBuffer[bufIndex/4];
this.Log(LogLevel.Info, "Read RX buffer[{0}]: 0x{1:X2}", bufIndex/4, value);
}
else
{
//否则返回发送缓冲区的内容（通常无意义）
value = txBuffer[bufIndex/4];
this.Log(LogLevel.Info, "Read TX buffer[{0}]: 0x{1:X2}", bufIndex/4, value);
// 发送/接收缓冲区地址 16-26
case Registers.TX_FRAME_INFO:
case Registers.TX_ID1:
case Registers.TX_ID2:
case Registers.TX_DATA1:
case Registers.TX_DATA2:
case Registers.TX_DATA3:
case Registers.TX_DATA4:
case Registers.TX_DATA5:
case Registers.TX_DATA6:
case Registers.TX_DATA7:
case Registers.TX_DATA8:
int bufIndex = (int)(offset - (long)Registers.TX_FRAME_INFO) / 4;
if (sr_rbs == 1)
{
value = rxBuffer[bufIndex];
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read RX buffer[{0}]: 0x{1:X2}", bufIndex, value);
}
else
{
value = txBuffer[bufIndex];
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read TX buffer[{0}]: 0x{1:X2}", bufIndex, value);
}
break;
}
break;
default:
// 未实现的寄存器返回0
this.Log(LogLevel.Info, "Read from unimplemented offset 0x{0:X}", offset);
value = 0;
break;
default:
if (EnableVerboseLog) this.Log(LogLevel.Info, "Read from unimplemented offset 0x{0:X}", offset);
value = 0;
break;
}
}
return value;
}
public void WriteByte(long offset, byte value)
{
switch ((Registers)offset)
lock (lockObject)
{
case Registers.MOD:
mod = value;
this.Log(LogLevel.Info, "Write MOD: 0x{0:X2}", value);
break;
switch ((Registers)offset)
{
case Registers.MOD:
mod = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write MOD: 0x{0:X2}", value);
break;
case Registers.CMR:
// 命令寄存器只写，处理命令
this.Log(LogLevel.Info, "Write CMR: 0x{0:X2}", value);
if ((value & CMR_TR) != 0)
{
// 发送请求
case Registers.CMR:
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write CMR: 0x{0:X2}", value);
if ((value & CMR_TR) != 0)
{
// 发送请求
if (sr_tbs == 1)
{
var frame = new byte[11];
if (txFrameQueue.Count < (MaxTxQueueSize - 1))
{
Array.Copy(txBuffer, frame, 11);
txFrameQueue.Enqueue(frame);
Array.Clear(txBuffer, 0, txBuffer.Length);
sr_tbs = 1;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Frame enqueued for transmission, queue size: {0}", txFrameQueue.Count);
}
else if (txFrameQueue.Count == (MaxTxQueueSize - 1))
{
Array.Copy(txBuffer, frame, 11);
txFrameQueue.Enqueue(frame);
Array.Clear(txBuffer, 0, txBuffer.Length);
sr_tbs = 0;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Frame enqueued, TX queue now full, TBS cleared");
}
else
{
sr_tbs = 0;
if (EnableVerboseLog) this.Log(LogLevel.Warning, "Send request while TBS=0 ignored");
}
}
else
{
if (EnableVerboseLog) this.Log(LogLevel.Warning, "Send request while TBS=0 ignored");
}
}
if ((value & CMR_RRB) != 0)
{
LoadNextRxFrame();
if (EnableVerboseLog) this.Log(LogLevel.Info, "Receive buffer released");
}
if ((value & CMR_CDO) != 0)
{
// 清除数据溢出（无操作，但保留接口）
if (EnableVerboseLog) this.Log(LogLevel.Info, "Clear data overflow (no effect)");
}
break;
case Registers.SR:
if (EnableVerboseLog) this.Log(LogLevel.Warning, "Attempted write to read-only SR");
break;
case Registers.IR:
if (EnableVerboseLog) this.Log(LogLevel.Warning, "Attempted write to read-only IR");
break;
case Registers.IER:
ier = (byte)(value & 0x01);
UpdateIrFromRbs();
UpdateInterrupts();
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write IER: 0x{0:X2}", ier);
break;
case Registers.BTR0:
btr0 = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write BTR0: 0x{0:X2}", value);
break;
case Registers.BTR1:
btr1 = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write BTR1: 0x{0:X2}", value);
break;
case Registers.OCR:
ocr = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write OCR: 0x{0:X2}", value);
break;
case Registers.RXERR:
rxerr = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write RXERR: 0x{0:X2}", value);
break;
case Registers.TXERR:
txerr = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write TXERR: 0x{0:X2}", value);
break;
case Registers.RBSA:
rbsa = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write RBSA: 0x{0:X2}", value);
break;
case Registers.CDR:
cdr = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write CDR: 0x{0:X2}", value);
break;
// 发送缓冲区写入
case Registers.TX_FRAME_INFO:
case Registers.TX_ID1:
case Registers.TX_ID2:
case Registers.TX_DATA1:
case Registers.TX_DATA2:
case Registers.TX_DATA3:
case Registers.TX_DATA4:
case Registers.TX_DATA5:
case Registers.TX_DATA6:
case Registers.TX_DATA7:
case Registers.TX_DATA8:
int bufIndex = (int)(offset - (long)Registers.TX_FRAME_INFO) / 4;
if (sr_tbs == 1)
{
// 将当前 txBuffer 复制一份加入发送队列
var frame = new byte[11];
Array.Copy(txBuffer, frame, 11);
lock (lockObject)
{
txFrameQueue.Enqueue(frame);
}
// 清空发送缓冲区，并立即释放 TBS，允许 CPU 继续写入下一帧
Array.Clear(txBuffer, 0, txBuffer.Length);
sr_tbs = 1;
this.Log(LogLevel.Info, "Frame enqueued for transmission, queue size: {0}", txFrameQueue.Count);
txBuffer[bufIndex] = value;
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write TX buffer[{0}]: 0x{1:X2}", bufIndex, value);
}
else
{
this.Log(LogLevel.Warning, "Send request while TBS=0 ignored");
if (EnableVerboseLog) this.Log(LogLevel.Warning, "Write to TX buffer while TBS=0 ignored");
}
}
if ((value & CMR_RRB) != 0)
{
// 释放接收缓冲器：尝试从接收队列中加载下一帧
lock (lockObject)
{
LoadNextRxFrame();
}
this.Log(LogLevel.Info, "Receive buffer released");
}
if ((value & CMR_CDO) != 0)
{
// 清除数据溢出（无操作）
this.Log(LogLevel.Info, "Clear data overflow (no effect)");
}
break;
break;
case Registers.SR:
if (sr_tbs == 1)
{
sr_tbs = 0;
}
else
{
sr_tbs = 1;
}
if (sr_rbs == 1)
{
sr_rbs = 0;
}
else
{
sr_rbs = 1;
}
break;
case Registers.IR:
// 只读，忽略写
this.Log(LogLevel.Warning, "Attempted write to read-only IR");
break;
case Registers.IER:
ier = (byte)(value & 0x01); // 只使用 bit0 (RIE)
UpdateIrFromRbs();
UpdateInterrupts();
this.Log(LogLevel.Info, "Write IER: 0x{0:X2}", ier);
break;
case Registers.BTR0:
btr0 = value;
this.Log(LogLevel.Info, "Write BTR0: 0x{0:X2}", value);
break;
case Registers.BTR1:
btr1 = value;
this.Log(LogLevel.Info, "Write BTR1: 0x{0:X2}", value);
break;
case Registers.OCR:
ocr = value;
this.Log(LogLevel.Info, "Write OCR: 0x{0:X2}", value);
break;
case Registers.RXERR:
rxerr = value;
this.Log(LogLevel.Info, "Write RXERR: 0x{0:X2}", value);
break;
case Registers.TXERR:
txerr = value;
this.Log(LogLevel.Info, "Write TXERR: 0x{0:X2}", value);
break;
case Registers.RBSA:
rbsa = value;
this.Log(LogLevel.Info, "Write RBSA: 0x{0:X2}", value);
break;
case Registers.CDR:
cdr = value;
this.Log(LogLevel.Info, "Write CDR: 0x{0:X2}", value);
break;
// 发送缓冲区写入
case Registers.TX_FRAME_INFO:
case Registers.TX_ID1:
case Registers.TX_ID2:
case Registers.TX_DATA1:
case Registers.TX_DATA2:
case Registers.TX_DATA3:
case Registers.TX_DATA4:
case Registers.TX_DATA5:
case Registers.TX_DATA6:
case Registers.TX_DATA7:
case Registers.TX_DATA8:
int bufIndex = (int)(offset - (long)Registers.TX_FRAME_INFO);
if (sr_tbs == 1)
{
txBuffer[bufIndex/4] = value;
this.Log(LogLevel.Info, "Write TX buffer[{0}]: 0x{1:X2}", bufIndex/4, value);
}
else
{
this.Log(LogLevel.Warning, "Write to TX buffer while TBS=0 ignored");
}
break;
default:
// 未实现的寄存器忽略写
this.Log(LogLevel.Info, "Write to unimplemented offset 0x{0:X} = 0x{1:X2}", offset, value);
break;
default:
if (EnableVerboseLog) this.Log(LogLevel.Info, "Write to unimplemented offset 0x{0:X} = 0x{1:X2}", offset, value);
break;
}
}
}
// ================ 公共方法与事件 ================
// ================ 内部辅助方法 ================
private void UpdateIrFromRbs()
{
if (sr_rbs == 1)
ir |= IR_RI;
else
ir = (byte)(ir & ~IR_RI);
ir = (byte)(ir & ~IR_RI);
}
private void UpdateInterrupts()
{
bool interrupt = ((ir & IR_RI) != 0) && ((ier & IER_RIE) != 0);
IRQ.Set(interrupt);
if (interrupt)
bool currentInterrupt = ((ir & IR_RI) != 0) && ((ier & IER_RIE) != 0);
if (currentInterrupt && !lastInterruptState)
{
IRQ.Set(true);
machine.ScheduleAction(TimeInterval.FromMicroseconds(1), _ =>
{
IRQ.Set(false);
});
this.Log(LogLevel.Info, "Interrupt asserted (RI)");
}
else
{
this.Log(LogLevel.Info, "Interrupt deasserted");
}
if (EnableVerboseLog) this.Log(LogLevel.Info, "Interrupt pulse generated (RI)");
}
lastInterruptState = currentInterrupt;
}
private readonly object lockObject = new object(); // 用于线程安全的锁对象
private readonly object lockObject = new object();
/// <summary>
/// 获取发送队列中所有帧的字符串表示（每帧以空格分隔的十六进制字节，帧间用换行分隔）
/// 调用后清空发送队列。
/// 调用后清空发送队列，并恢复发送缓冲区状态（如果之前因队列满被锁定）。
/// </summary>
public string GetTxBufferDataString()
{
@@ -349,7 +352,8 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
{
if (txFrameQueue.Count == 0)
{
Console.WriteLine("GetTxBufferDataString: no frames in TX queue");
if (EnableVerboseLog) Console.WriteLine("GetTxBufferDataString: no frames in TX queue");
if (sr_tbs == 0) sr_tbs = 1;
return null;
}
var sb = new StringBuilder();
@@ -361,17 +365,19 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
if (i > 0) sb.Append(" ");
sb.Append(frame[i].ToString("X2"));
}
sb.AppendLine(); // 帧间换行
sb.AppendLine();
}
string result = sb.ToString().TrimEnd();
Console.WriteLine("GetTxBufferDataString returning: " + result);
sr_tbs = 1;
if (EnableVerboseLog) Console.WriteLine("GetTxBufferDataString returning: " + result);
return result;
}
}
/// <summary>
/// 外部接口注入一帧接收数据（11字节的十六进制字符串，空格分隔）
/// 可多次调用以注入多帧，帧将存入接收队列。
/// 若接收队列已满，则新帧被丢弃。
/// </summary>
public void SendRxBufferDataString(string frameString)
{
@@ -379,13 +385,13 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
{
if (string.IsNullOrWhiteSpace(frameString))
{
Console.WriteLine("SendRxBufferDataString: empty string, ignored");
if (EnableVerboseLog) Console.WriteLine("SendRxBufferDataString: empty string, ignored");
return;
}
string[] parts = frameString.Split(new[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length != 11)
{
Console.WriteLine($"SendRxBufferDataString: expected 11 bytes, got {parts.Length}, ignored");
if (EnableVerboseLog) Console.WriteLine($"SendRxBufferDataString: expected 11 bytes, got {parts.Length}, ignored");
return;
}
byte[] frame = new byte[11];
@@ -395,15 +401,21 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
if (!byte.TryParse(part, System.Globalization.NumberStyles.HexNumber,
System.Globalization.CultureInfo.InvariantCulture, out byte b))
{
Console.WriteLine($"SendRxBufferDataString: invalid hex byte '{part}' at index {i}, set to 0");
if (EnableVerboseLog) Console.WriteLine($"SendRxBufferDataString: invalid hex byte '{part}' at index {i}, set to 0");
b = 0;
}
frame[i] = b;
}
rxFrameQueue.Enqueue(frame);
Console.WriteLine($"Frame enqueued to RX queue, size: {rxFrameQueue.Count}");
// 如果当前接收缓冲区空闲，立即加载第一帧
if (rxFrameQueue.Count >= MaxRxQueueSize)
{
if (EnableVerboseLog) Console.WriteLine($"SendRxBufferDataString: RX queue full (max={MaxRxQueueSize}), frame dropped");
return;
}
rxFrameQueue.Enqueue(frame);
if (EnableVerboseLog) Console.WriteLine($"Frame enqueued to RX queue, size: {rxFrameQueue.Count}");
if (sr_rbs == 0)
{
LoadNextRxFrame();
@@ -411,7 +423,6 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
}
}
// 从接收队列中加载下一帧到 rxBuffer，并更新状态
private void LoadNextRxFrame()
{
if (rxFrameQueue.Count > 0)
@@ -421,20 +432,20 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
sr_rbs = 1;
UpdateIrFromRbs();
UpdateInterrupts();
Console.WriteLine("Loaded next RX frame into buffer, queue remaining: {0}", rxFrameQueue.Count);
if (EnableVerboseLog) Console.WriteLine("Loaded next RX frame into buffer, queue remaining: {0}", rxFrameQueue.Count);
}
else
{
sr_rbs = 0;
UpdateIrFromRbs();
UpdateInterrupts();
Console.WriteLine("RX queue empty, buffer cleared");
if (EnableVerboseLog) Console.WriteLine("RX queue empty, buffer cleared");
}
}
// ================ 属性 ================
public long Size => 0x80; // 地址范围 0-31
public long Size => 0x80;
public GPIO IRQ { get; }
@@ -444,15 +455,15 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
{
MOD = 0x00,
CMR = 0x04,
SR = 0x08,
IR = 0x0C,
SR = 0x08,
IR = 0x0C,
IER = 0x10,
BTR0 = 0x18,
BTR1 = 0x1C,
OCR = 0x20,
RXERR = 0x38, // 14
TXERR = 0x3C, // 15
TX_FRAME_INFO = 0x40, // 16
OCR = 0x20,
RXERR = 0x38,
TXERR = 0x3C,
TX_FRAME_INFO = 0x40,
TX_ID1 = 0x44,
TX_ID2 = 0x48,
TX_DATA1 = 0x4C,
@@ -462,31 +473,28 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
TX_DATA5 = 0x5C,
TX_DATA6 = 0x60,
TX_DATA7 = 0x64,
TX_DATA8 = 0x68, // 26
RBSA = 0x78, // 30
CDR = 0x7C, // 31
TX_DATA8 = 0x68,
RBSA = 0x78,
CDR = 0x7C,
}
// ================ 常量位定义 ================
private const byte CMR_TR = 0x01; // 发送请求 (bit0)
private const byte CMR_RRB = 0x04; // 释放接收缓冲器 (bit2)
private const byte CMR_CDO = 0x08; // 清除数据溢出 (bit3)
private const byte CMR_TR = 0x01;
private const byte CMR_RRB = 0x04;
private const byte CMR_CDO = 0x08;
private const byte SR_BS = 0x80; // 总线状态 (bit7) - 本模拟中恒0
private const byte SR_TBS = 0x04; // 发送缓冲器状态 (bit2)
private const byte SR_RBS = 0x01; // 接收缓冲器状态 (bit0)
private const byte SR_BS = 0x80;
private const byte SR_TBS = 0x04;
private const byte SR_RBS = 0x01;
private const byte IR_RI = 0x01; // 接收中断 (bit0)
private const byte IER_RIE = 0x01; // 接收中断使能 (bit0)
private const byte IR_RI = 0x01;
private const byte IER_RIE = 0x01;
// ================ 私有字段 ================
private readonly IMachine machine;
// 寄存器存储
private byte mod;
private byte ier;
private byte btr0, btr1;
@@ -495,16 +503,16 @@ namespace Antmicro.Renode.Peripherals.CustomPeripherals
private byte rbsa;
private byte cdr;
// 状态位
private byte sr_tbs; // 1=空闲
private byte sr_rbs; // 1=有数据
private byte sr_tbs;
private byte sr_rbs;
private byte ir;
private byte ir; // 仅 bit0 有效
private bool lastInterruptState; // 用于中断边沿检测
private readonly byte[] txBuffer; // 临时发送缓冲区（单帧）
private readonly byte[] rxBuffer; // 当前接收帧（单帧）
private readonly byte[] txBuffer;
private readonly byte[] rxBuffer;
private readonly Queue<byte[]> txFrameQueue; // 发送队列
private readonly Queue<byte[]> rxFrameQueue; // 接收队列
private readonly Queue<byte[]> txFrameQueue;
private readonly Queue<byte[]> rxFrameQueue;
}
}