Arduino IDE 未连接到微控制器

Question

尝试通过 USB 串行连接连接到 Arduino 时出现此错误。我使用的是 Arduino IDE 1.0.1 和 64 位版本的 Ubuntu 12.04。自 10.04 以来，这一直是一个反复出现的问题，并且也发生在其他一些使用串行连接的程序中。我使用 Python 或 Screen 从 Arduino 获取串行数据没有问题。否则 Arduino IDE 似乎工作得很好。

processing.app.SerialException: Error opening serial port '/dev/ttyACM0'.
at processing.app.Serial.<init>(Serial.java:178)
at processing.app.Serial.<init>(Serial.java:92)
at processing.app.SerialMonitor.openSerialPort(SerialMonitor.java:207)
at processing.app.Editor.handleSerial(Editor.java:2447)
at processing.app.EditorToolbar.mousePressed(EditorToolbar.java:353)
at java.awt.Component.processMouseEvent(Component.java:6386)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3268)
at java.awt.Component.processEvent(Component.java:6154)
at java.awt.Container.processEvent(Container.java:2045)
at java.awt.Component.dispatchEventImpl(Component.java:4750)
at java.awt.Container.dispatchEventImpl(Container.java:2103)
at java.awt.Component.dispatchEvent(Component.java:4576)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4633)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4294)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4227)
at java.awt.Container.dispatchEventImpl(Container.java:2089)
at java.awt.Window.dispatchEventImpl(Window.java:2518)
at java.awt.Component.dispatchEvent(Component.java:4576)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:672)
at java.awt.EventQueue.access$400(EventQueue.java:96)
at java.awt.EventQueue$2.run(EventQueue.java:631)
at java.awt.EventQueue$2.run(EventQueue.java:629)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:116)
at java.awt.EventQueue$3.run(EventQueue.java:645)
at java.awt.EventQueue$3.run(EventQueue.java:643)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:642)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
Caused by: gnu.io.UnsupportedCommOperationException: Invalid Parameter
at gnu.io.RXTXPort.setSerialPortParams(RXTXPort.java:171)
at processing.app.Serial.<init>(Serial.java:163)
... 35 more

Answer 1

我也遇到了这个问题，结果证明它是由串行监视器设置为速度 14400 引起的。由于您无法在没有工作串行端口的情况下更改设置，因此唯一的方法是退出 Arduino UI 并编辑preferences.txt 文件（在Unix 中，它在 中~/.arduino/preferences.txt）。查找Serial.debug_rate并将其更改为9600. 重新启动 Arduino UI 并尝试上传一个简单的草图（例如“闪烁”），看看它是否能解决问题。

我不确定为什么会发生这种情况 - 我使用过 14400 并且从未遇到过问题。我想这只是那些似乎永远没有可重复原因的奇怪问题之一？