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HiCPU:dsPIC30F5015 MPLAB XXC16:v1.26ICD3I有一个由两个处理器A和C组成的系统，它们通过半双工RS485线路相互通信。因为两边都是半双工的，所以大部分时间都在监听，但是C每半秒就发送一个“ping”。当系统启动时，A处理器对这个“ping”作出响应，并带有“ACK”消息（这也意味着A和B在发送时需要改变各自RS 465收发信机上的“方向”）。半双工发送和接收工作大约4秒钟，然后A停止对来自C的ping的响应。我可以看到C处理器上的发送和接收通过两个闪光的LED进行，闪光灯位于“C处理器RS 485收发信机内，即直接在C处理器UART传输上”。奇怪的是，如果我在第一个字节被写到U1TXREG之前在一行上设置断点（在A的源代码中，在A已经“停止”之后），A就发送响应（如果我继续按IDE中的运行按钮，A就继续发送消息），但是如果我设置了当A应该已经发送了所有字节时，A处理器不发送消息。为什么A发送只在启动时“工作”大约4秒钟，并且只有当我使用断点时才继续？有没有看到这个，有一些硅勘误表可以帮助我吗？ICD3“冻结外围设备”重载CPU吗？问候/斯特凡
以上来自于百度翻译 以下为原文 Hi CPU: dsPIC30F5015 MPLAB X XC16: v1.26 ICD3 I have a system here consisting of two processors, A and C, which are communicating with each other via a half duplex RS485 line. Because of the half duplex both sides most of the time is listening but C sends a "pings" every half second. The A processor respond on this "ping" with an "ACK" message (this also means that A and B need to change "direction" on their respective RS 465 transceiver when sending) When the system starts the half duplex sending and receiving works for some 4 seconds and then the A stops responding on the ping from C. I can see the transmit and receive on the C processor via two LED's that flashes that sits "inside the C processor RS 485 transceiver, that is directly on the C processor UART transmit and receive pins. The strange thing is that if I set a break point (in the source code for A after A have "stalled") on a line just before the first byte is written to U1TXREG the A sends it respond (and if I continue to press the run button in the IDE the A continue to send messages) but if I set a break point on a line when the A is supposed to have sent all bytes, the A processor is not sending the messages. How come the A sending only "works" for some 4 seconds at start up and only continue if I use a break point? Have any seen this, is there some silicon errata that might help me? Do the ICD3 "freeze peripherals" ghosting the CPU ? Regards /Stefan 
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可能是RS-485收发器的安装时间有点短吗？结合一些热效应，这可能可以解释为什么在Tx重置为“良好行为”之前断裂（我预计不会再持续4秒左右）。
以上来自于百度翻译 以下为原文 Could it be that the setup time for the RS-485 transceiver is a bit short? Combined with some thermal effects this might explain why breaking before Tx resets to 'good behavior' (that I'd expect to last no longer than another 4 seconds or so). |
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是否有USAT错误检查？（如果不是，这将永远阻止你的串口）调试器，是的，它确实可以阻止外设…
以上来自于百度翻译 以下为原文 DO you have USART error checking in place? (if not, this could stop your serial port forever) The debugger, yes, indeed it could stop the peripherals... |
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你好，我对此表示怀疑，切换到收发机模式的等待时间是1毫秒，而事实上，每样东西在最初4秒看起来都很好，这感觉不是“开关收发机”模式的问题。系统总是接通的，而且是可重复的。
以上来自于百度翻译 以下为原文 Hi I am sceptical to this, the wait time for switching to transceiver mode is 1 millisecond, and the fact that everything looks good the first 4 seconds it feels not being a "switch transceiver" mode problem. The system is switched on all the time and it is repeatable. |
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是的，USART错误检查已经就位，我可以检查这些位，但是这意味着ICD3会在后台以不希望的方式影响USART（当它仅在断点停止时）。我会尝试旧的时尚学校，这是注释越来越多的代码，直到它只剩下UART代码。
以上来自于百度翻译 以下为原文 Yes, USART error checking is in place, I can check those bits but that means that the ICD3 would then affect the USART in the background (when it only stops at a breakpoint) in a undesired way. I am leaning towards the ICD3, but it must be some delayed effect because everything works at start up. I will try the old fashion school, that is comment away more and more code until it is only the UART code left. |
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1毫秒翻译成多少指令？典型地，驱动器设置时间随(芯片)温度、工作电压等而变化。Re ICD3：如果没有监视窗口是活动的，并且dsPIC正在启动和运行，我不期望ICD3干扰。这也证实了TX断开后不会影响故障的事实。
以上来自于百度翻译 以下为原文 1 ms translates to how many THOUSANDS of instructions? Typically driver setup times vary with (chip) temperature, operating voltage etc. Re ICD3: if no watch window is active and the dsPIC is up and running, I do not expect the ICD3 to interfere. Which is also confirmed by the fact that breaking AFTER the Tx does not influence the malfunction. |
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