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设备重置时USB串行端口垃圾

[英]USB serial port garbage when the device resets

原文 2011-04-12 06:21:11 0 1 c/ serial-port/ arduino

When I reset a USB device that is connected via USB serial it starts printing garbage. 当我重置通过USB串行连接的USB设备时，它将开始打印垃圾。

If I close out the serial monitor (using Arduino's serial console but should not matter) and reopen, clean text starts printing. 如果我关闭了串行监视器（使用Arduino的串行控制台，但没有关系）并重新打开，则开始打印干净的文本。 Judging by the rate of transmission, the garbage is clearly caused by my device doing normal serial printing -- that is, it is not random garbage. 从传输速率来看，垃圾显然是由我的设备执行正常的串行打印导致的，也就是说，它不是随机垃圾。

This is a homebrew USB serial device so the problem could very well be in there. 这是一个自制的USB串行设备，因此问题很可能就在那里。 In fact, I can very easily change the code in USB serial device, but cannot do the same for the serial terminal program :-), so would prefer if the solution was there. 实际上，我可以很容易地更改USB串行设备中的代码，但是不能对串行终端程序:-)进行相同的操作，因此，如果有解决方案，则我更愿意这样做。

No, this is not an incorrect baud or parity setting so please don't suggest it! 不，这不是错误的波特率或奇偶校验设置，因此请不要提出！ :-) :-)

Thanks for any help/ideas! 感谢您的帮助/想法！

1 个解决方案

Is it printing garbage even when nothing is being (intentionally) transmitted? 即使什么也没有（有意地）传输，它也打印垃圾吗？ If so, there is a hardware problem. 如果是这样，则存在硬件问题。 Either it resets into a "break" state, or it is jabbering. 它要么重置为“中断”状态，要么正在刺戳。

If it happens only when data is written through it, then, when the device resets, what serial settings does it default to? 如果仅在写入数据时发生这种情况，那么当设备复位时，它默认为什么串行设置？ Almost certainly this is caused by a speed/data bits/stop bits problem. 几乎可以肯定，这是由速度/数据位/停止位问题引起的。