Several minor fixes for the new doxygen manual.
git-svn-id: svn://svn.berlios.de/openocd/trunk@1789 b42882b7-edfa-0310-969c-e2dbd0fdcd60__archive__
parent
ca7ec066b2
commit
30f6b1ebbc
|
@ -1,7 +1,7 @@
|
|||
/** @page jtagdocs OpenOCD JTAG APIs
|
||||
|
||||
This document contains @subpage jtagprimer, which introduces the
|
||||
IEEE JTAG interface.
|
||||
For new developers unfamiliar with the technology, @ref primerjtag provides
|
||||
a brief introduction to the IEEE JTAG interface.
|
||||
|
||||
The OpenOCD JTAG library API covers several functional areas:
|
||||
|
||||
|
|
|
@ -7,9 +7,9 @@ of APIs and gives an overview of how they fit together.
|
|||
|
||||
*/
|
||||
|
||||
/** @page primer OpenOCD Techincal Primers
|
||||
/** @page primer OpenOCD Technical Primers
|
||||
|
||||
This pages lists Techincal Primers available for OpenOCD Developers.
|
||||
This pages lists Technical Primers available for OpenOCD Developers.
|
||||
They seek to provide information to pull novices up the learning curves
|
||||
associated with the fundamental technologies used by OpenOCD.
|
||||
|
||||
|
|
|
@ -30,10 +30,10 @@ between TDI and TDO. The second diagram shows the state transitions on
|
|||
TMS which will select different shift registers.
|
||||
|
||||
The first thing you need to do is reset the state machine, because when
|
||||
you connect to a chip you dont know what state the jtag is in,you need
|
||||
you connect to a chip you do not know what state the controller is in,you need
|
||||
to clock TMS as 1, at least 7 times. This will put you into "Test Logic
|
||||
Reset" State. Knowing this, you can, once reset, then track what each
|
||||
transition on TMS will do, and hence know what state the jtag state
|
||||
transition on TMS will do, and hence know what state the JTAG state
|
||||
machine is in.
|
||||
|
||||
There are 2 "types" of shift registers. The Instruction shift register
|
||||
|
@ -47,7 +47,7 @@ instruction register.
|
|||
|
||||
For example, one of the data registers will be known as "bypass" this is
|
||||
(usually) a single bit which has no function and is used to bypass the
|
||||
chip. Eg, assume we have 3 identical chips, wired up like the picture
|
||||
chip. Assume we have 3 identical chips, wired up like the picture
|
||||
and each has a 3 bit instruction register, and there are 2 known
|
||||
instructions (110 = bypass, 010 = some other function) if we want to use
|
||||
"some other function", on the second chip in the line, and not change
|
||||
|
@ -88,7 +88,8 @@ TDI (holding TMS to 0):
|
|||
|
||||
0 1 0 1 0 1 1 1 1 0
|
||||
|
||||
Again, we are clocking the lsbit first. Then we would clock TMS:
|
||||
Again, we are clocking the least-significant bit first. Then we would
|
||||
clock TMS:
|
||||
|
||||
1 1 0
|
||||
|
||||
|
|
Loading…
Reference in New Issue