您好,基本结构没什么不同,就在细节处理上有点差别。主要有一下两点。
1.去掉了部分地址线上的上下拉电阻。
2.去掉了JTAG上的缓冲芯片,改为和仿真器直接相连的那种。
请问如何检测JTAG的信号的正确性,如何判断JTAG接口没有损坏?
非常感谢!
在ccs3.3开发环境下,使用seed 510仿真器连接时提示如下错误。
Error connecting to the target:
Error 0x80000240/-1146
Fatal Error during: Initialization, OCS,
Invalid data was scanned by the emulation controller.
Verify the board setup to make sure the scan chain is properly
defined.
If the setup is correct, then RESET EMULATOR. This will disconnect each
target from the emulator. The targets should then be power cycled
or hard reset followed by an emureset and reconnect to each target.
I/O Port = 240
Board Name: C6455 SEEDXDS510PLUS Emulator
Cpu Name: C6400PLUS_0
Abort: Close Code Composer Studio.
Retry: Try to connect to the target again.
Cancel: Remain disconnected from the target
Diagnostic: Run diagnostic utility.
后来换了XDS100V2仿真器在ccsV5开发环境下进行了jtag的测试。JTAG的连接测试是通过的。但程序无法下载。
但是在下载程序的时候依然提示错误,无法连接下载。
请问这可能是什么原因呢?谢谢!