TI中文支持网Part Number:LAUNCHXL-CC3235SFOther Parts Discussed in Thread:UNIFLASH
请问我在板子上换了个主控芯片，但是重新进行烧录时出现了以下错误，也用UNIFLASH改了development模式并烧了进去，但是还是不能进行DEBUG，请问是什么原因呢？
Kevin Qiu1：
看下关于这个错误的说明，可能时连接线有问题或者接触不良等
This error means the JTAG debugger is unable to access the core or device on the board.
Technically speaking, this happens if the JTAG debugger fails to access an ICEPick register (exceptions are MSP430, Stellaris and some C2000 Wireless connectivity and Digital Power MCUs, which do not have an ICEPICK). If the ICEPick driver reports this error immediately upon connect, it's likely a hard fail with the JTAG connection itself (loose cables or connections, etc.). However, if the error happens later in the debug session the reasons are different (perhaps the reliability of the JTAG connection due to noise, or improper firmware that causes the device to power cycle or reset, etc.).
This issue can also manifest itself if the Debug Probe senses the scan path is broken. Some troubleshooting tips can be found at the section Invalid data read back below.
In certain scenarios the loaded code may cause issues with the normal connection and/or execution. In this case, check the troubleshooting tips in the error Invalid device ID below.
Additional tips to properly debug and correct this error are also in the section Troubleshooting the connect phase above.
Error connecting to the target:(Error -2131 @ 0x0)Unable to access device register. Reset the device, and retry the operation. Iferror persists, confirm configuration, power-cycle the board, and/or trymore reliable JTAG settings (e.g. lower TCLK).
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wu：
连接线是买开发板自带的USB线，之前都是可以用的，应该不是连接线的问题，而接触也不太可能，因为都拔插过几次进行测试了，依旧会出现这种问题，请问应该怎么处理呢？之前也是更换了开发板上的主控就会出现这种问题，而开发板自带的主控就不会，这是什么原因呢？
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Kevin Qiu1：
将更换后连接图传上来
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wu：
我们的板通过连接开发板的TDI TDO TCK TMS RST VDD GND TX RX，然后通过开发板将程序烧录到我们的板子上，之前通过开发板上的主控芯片换到我们的板子上的时候是可以进行烧录的，但是换了新的芯片后就出现问题了。
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Kevin Qiu1：
wu 说：之前通过开发板上的主控芯片换到我们的板子上的时候是可以进行烧录的，但是换了新的芯片后就出现问题了。
你要检查焊接有没有问题
你的连线看起来不是很好，我不确定它们是否有问题，一个建议：初始测试板应保留必要的测试、调试接口
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wu：
换了个主控芯片，用UNIFLASH进行烧录时出现了以下错误，请问是什么原因呢？
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Kevin Qiu1：
和上面一样，检查连线或焊接，用Uniflash尤其注意UART的连线
