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more docs on jtag_add_pathmove() 

git-svn-id: svn://svn.berlios.de/openocd/trunk@1558 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2009-04-28 20:59:52 +00:00
parent abeee8b4c2
commit 18b5a88a8a
1 changed files with 12 additions and 1 deletions
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13
src/jtag/jtag.h
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@ -575,7 +575,18 @@ extern int interface_jtag_add_plain_dr_scan(int num_fields, scan_field_t* field
extern void jtag_add_tlr(void);
extern int interface_jtag_add_tlr(void);
/* Do not use jtag_add_pathmove() unless you need to, but do use it
/* Application code *must* assume that interfaces will
* implement transitions between states with different
* paths and path lengths through the state diagram. The
* path will vary across interface and also across versions
* of the same interface over time. Even if the OpenOCD code
* is unchanged, the actual path taken may vary over time
* and versions of interface firmware or PCB revisions.
*
* Use jtag_add_pathmove() when specific transition sequences
* are required.
*
* Do not use jtag_add_pathmove() unless you need to, but do use it
* if you have to.
*
* DANGER! If the target is dependent upon a particular sequence