embeded/ARM2015. 12. 14. 10:30

음.. JTAG없이 SWD만으로 하는데

SWD로 안되면.. 머가 문제일려나..

TCK/TMS 인식인가..?

How do I switch the debugger connection between JTAG and SWD (Serial Wire Debug) protocol?

Applies to: Debug Access Port (DAP)


The SWJ-DP component supports both protocols - Serial Wire and JTAG. The selector is part of the SWJ-DP.

The default protocol at power-up is JTAG, so if you want to use Serial Wire, you need to use the TCK and TMS pins to scan in a special 'key', which is a sequence of TMS values which has no effect for a pure JTAG TAP but is recognized by a SWJ-DP TAP as a request to switch into Serial Wire mode. Similarly, there is another another TMS sequence to switch back from SWD to JTAG protocol.

[링크 : http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka11775.html]

'embeded > ARM' 카테고리의 다른 글

armada 370 - ARMv7 인데 neon이 없네?  (0) 2015.12.30
jtag/swd pullup & pulldown  (0) 2015.12.17
jtag과 swd  (0) 2015.12.14
비글본 github 저장소  (0) 2015.10.30
arm9 dsp / arm11 simd instuction 비교?  (0) 2015.10.01
arm11 simd instruction  (0) 2015.10.01
Posted by 구차니

댓글을 달아 주세요