阻止Real Ice为电路供电

嗨，真正的冰，不像ICD3和PICTIT3，不能为目标板供电。你到底注意到什么让你恼火？当做



      以下为原文

    Hi,
Real-Ice, unlike ICD3 and Pickit3, cannot power the target board.
What do you exactly notice which annoys you ?
Regards
 

因此，我有PIC32 MZ EF启动器套件（DM3200 07），插入IO转换器板（AC3200 06），插入IO扩展板（DMS3200）。真正的ICE通过RJ12编程头插入IO扩展板，并删除启动工具包上的编程跳线（断开车载调试器，并从IO扩展板连接编程头）。唯一的另一条电缆是一根电力电缆进入IO扩展板上的桶连接器。如果我把所有的电源都供电，然后用实心板编程，然后拔掉电源电缆，板就保持供电。没有完全供电，因为LED暗淡，但它确实从现实中汲取电力，因为这是唯一的其他电缆。我也尝试了ICD3，进入设置，并确保“电源电路”选项被禁用。我也有同样的结果。我只想能够用电源连接器来循环我的电路，但是现在我还必须把程序员断开，使电路完全不供电。谢谢，John Vickers。



      以下为原文

    So I have the PIC32MZ EF Starter Kit (DM320007), plugged into the IO converter board (AC320006), plugged into the IO expansion board (DM320002). The Real ICE is plugged into the IO expansion board via the RJ12 programming header, and the programming jumper on the Starter Kit is removed (to disconnect the onboard debugger, and connect the programming header from the IO expansion board). The only other cable is a power cable going into the barrel connector on the IO expansion board.
 
If I power everything on, and program the board with the RealICE, then unplug the power cable, the board stays powered. Not fully powered because the LEDs dim, but it is definitely drawing power from the RealICE since that is the only other cable.
 
I tried this with the ICD3 as well, went into the settings and made sure the "Power Circuit" option is disabled. I had the same results.
 
I just want to be able to power cycle my circuit with only the power connector, but currently I have to also disconnect the programmer to full unpower the circuit.
 
Thanks,
John Vickers

当使用外部电源时，实际ICE和ICD3都将检测目标功率并将缓冲驱动器设置为该电压。这是不连续监测，所以我猜是PGC/PGD线为您的电路供电。你必须断开RJ11电缆来完全消除这个电压。



      以下为原文

    Both REAL ICE and ICD3 when using external power will sense the target power and set the buffer drivers to that voltage.  This is not monitored constantly so my guess is that the PGC/PGD lines are powering your circuit.  You will have to disconnect the RJ11 cable to totally eliminate this voltage.
 
 

但这是我的观点，是否有任何设置来阻止这种情况发生，所以我不必每次我想为我的系统供电时断开调试器。维克斯



      以下为原文

    But that is my point, is there any setting to stop that from happening so I don't have to disconnect my debugger every time I want to power cycle my system?
 
John Vickers

你只是担心电路板有功率，还是有特定的东西没有被MCLR/RESET输入重置？在实践中，我想我会测量你正在获得的电压，并加载板上的电源，比如说，一个100欧姆的电阻，这样泄漏就不能使电路板供电。我也会看“保持板复位”选项，希望三态PGC输出。



      以下为原文

    Are you simply concerned that the board has power, or is there something specific that isn't reset by the MCLR/reset input?
 
In practice, I think I would measure the voltage you are getting, and load down the power supply on the boards with, say, a 100 ohm resistor so that leakage could not power up the board.
 
I'd also look at the "hold board in reset" option, which hopefully tri-states the PGC output.

不，你不能关掉司机，他们将在100%的时间。但我想大多数时候司机都是低的，所以他们不应该为你的目标提供动力。你可以在断开时，分出哪些线是高的（PGC/PGD/MCLR）？MCLR应该是高的让你的设备运行。该设备需要运行，以便调试器可以访问调试引擎并与设备进行对话。如果该部件处于复位状态（MCLR低），我们不能对设备进行任何操作。



      以下为原文

    No, you can't turn off the drivers, they will be on 100% of the time.  But I would think that most of the time the drivers are low so they should not be powering your target.
 
Can you scope out and see which lines are high (PGC/PGD/MCLR) when you disconnect?
 
MCLR should be high to have your device running.  and the device needs to run so the debugger can access the debug engine and talk to the device.  If the part is in reset (MCLR low) we can't do anything with the device.