P&E报错：“Cannot enter background mode.”

kinetis-425530 · 发表于 2013-8-30 16:04:53

最近客户反映，他们使用P&E工具读MPC5565的ROM程序时，读取异常，并报错：“Cannot enter background mode.”我在网上查到相应资料，有关于对应错误的解决办法，只是自己从来没有使用过P&E工具，对应看的不是很懂，还请各位帮忙！
附件是对应客户提供的P&E工具下的，里面有对应的解决办法。
This is accomplished by P&E's ICD (In-Circuit Debugger) software on the host PC by generating the following reset
sequence:
1. Reset is driven low (to processor).
2. Shifting activity appears on TCLK, TDI and TDO. (PC software instructs the processor to enable debug
mode).
3. Reset is released by Multilink and will go high.
4. Shifting activity appears on TCLK, TDI and TDO. (Debug activity).
Note that if the device does not enter debug mode, the ICD debugger issues the error message “Cannot enter
background mode.” If you receive this message, you should first refer to the troubleshooting section of this
document. You should then check your hardware with a scope, logic analyzer or logic probe.
First check for power on,---》板子需要外部供电？通过P&E工具连PC不会自动给板子供电么？
then check to make sure the processor oscillator is running.---》具体如何检测确认cpu在运行？
Finally, look for the startup sequence given above.---》上面的流程可以用示波器检测对应外部引脚看到结果，这些流程不是P&E工具ICD软件自动完成的么，可以步进检测么？

我知道答案目前已有5人回答

阅读全文

kinetis-425530 · 发表于 2013-8-30 16:06:13

This is
accomplished by P&E's ICD (In-Circuit Debugger) software on the host PC by generating the following reset
sequence:
1. Reset is driven low (to processor).
2. Shifting activity appears on TCLK, TDI and TDO. (PC software instructs the processor to enable debug
mode).
3. Reset is released by Multilink and will go high.
4. Shifting activity appears on TCLK, TDI and TDO. (Debug activity).
Note that if the device does not enter debug mode, the ICD debugger issues the error message “Cannot enter
background mode.” If you receive this message, you should first refer to the troubleshooting section of this
document. You should then check your hardware with a scope, logic analyzer or logic probe. First check for power
on, then check to make sure the processor oscillator is running. Finally, look for the startup sequence given above.