TI工程师,您好!
我们设计制作了一块C6747板卡,但是在CCS3.3中使用仿真器连接时出现以下问题:
Error connecting to the target:
Error 0x80000240/-275
Fatal Error during: Initialization, OCS,
This error was generated by TI's USCIF driver.
Error 0x80000240/-275
Fatal Error during: Initialization, OCS,
This error was generated by TI's USCIF driver.
SC_ERR_SCAN_POLL_BUSY <-275>
The attempt to poll a target device exceeded its timeout limit.
The utility or debugger has requested that a target device be repeatedly accessed for a specific data or status value.
This has failed because the built-in limit for the maximum number of attempts when polling the JTAG scan-path has been exceeded.
Board Name: C6747 XDS560 Emulator
Cpu Name: TMS320C674X_0
仿真器为合众达XDS560PLUS,使用相同的软件和仿真器连接其它型号的C6747的板卡时均未出现问题,JTAG接口电路也是完全复制以前的成熟板卡。
请问造成以上问题的原因是什么?
或者如何逐步检测以确定问题所在、并解决上述问题?
Fengyan An:
回复 Shine:
目前问题已经得到解决,是板子上电后reset未拉高导致DSP未正常工作所致。
根据查阅的资料,当电源正常供电、晶振起振、reset拉高后JTAG就应该能够正常工作,否则应该怀疑软件的设置。不知是否可以这样理解。希望对其他人有所帮助。
感谢回复!
Shine:
回复 Fengyan An:
谢谢分享!
一般DSP跑起来, JTAG口电路连接没问题的话, JTAG就能正常工作.