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| author | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2009-04-28 20:59:52 +0000 |
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| committer | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2009-04-28 20:59:52 +0000 |
| commit | 18b5a88a8a6ea6cf93864d27a65b4d229a6f6fb6 (patch) | |
| tree | 34f03bdcf830ec5ccf25be0768e7be45d17bae1c | |
| parent | abeee8b4c237914a87921f2e3aa733b9fc699908 (diff) | |
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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
| -rw-r--r-- | src/jtag/jtag.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h index e0761463..8f0f477c 100644 --- a/src/jtag/jtag.h +++ b/src/jtag/jtag.h @@ -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 |