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fix(device): 修复 macOS/Linux 下打开串口导致 ESP32 复位、握手失败 #67

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Merged
ca1e merged 1 commit into from
Oct 7, 2026
Merged

fix(device): 修复 macOS/Linux 下打开串口导致 ESP32 复位、握手失败 #67

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13 changes: 13 additions & 0 deletions src/EasyCon.Device/Connection/TTLSerialClient.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,14 @@ public override void Connect()
return;

_sport = new SerialPort(_connStr, _port);
// 非 Windows 平台打开串口时系统会先拉高 DTR/RTS，若随后先撤销 DTR，会短暂出现
// “RTS 高、DTR 低”，经 ESP32 等板子的自动下载电路拉低 EN 导致单片机复位。
// 因此以拉高状态打开，再在 Open 后按“先 RTS、后 DTR”的顺序撤销（见 Loop）。
if (!OperatingSystem.IsWindows())
{
_sport.DtrEnable = true;
_sport.RtsEnable = true;
}

source = new CancellationTokenSource();
var token = source.Token;
Expand Down Expand Up @@ -88,6 +96,11 @@ void Loop()
{
byte[] inBuffer = new byte[2550];
_sport.Open();
if (!OperatingSystem.IsWindows())
{
_sport.RtsEnable = false;
_sport.DtrEnable = false;
}
_sport.DiscardInBuffer();
_sport.DiscardOutBuffer();
var stream = _sport.BaseStream;
Expand Down