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comment about slow RTCK 

git-svn-id: svn://svn.berlios.de/openocd/trunk@972 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2008-08-27 06:05:27 +00:00
parent 113436df6f
commit a5cbe5bd85
1 changed files with 7 additions and 1 deletions
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8
src/jtag/jtag.h
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@ -199,7 +199,13 @@ typedef struct jtag_interface_s
int (*init)(void); int (*init)(void);
int (*quit)(void); int (*quit)(void);
/* returns JTAG maxium speed for KHz. 0=RTCK. The function returns /* returns JTAG maxium speed for KHz. 0=RTCK. The function returns
a failure if it can't support the KHz/RTCK. */ a failure if it can't support the KHz/RTCK.
WARNING!!!! if RTCK is *slow* then think carefully about
whether you actually want to support this in the driver.
Many target scripts are written to handle the absence of RTCK
and use a fallback kHz TCK.
*/
int (*khz)(int khz, int *jtag_speed); int (*khz)(int khz, int *jtag_speed);
/* returns the KHz for the provided JTAG speed. 0=RTCK. The function returns /* returns the KHz for the provided JTAG speed. 0=RTCK. The function returns
a failure if it can't support the KHz/RTCK. */ a failure if it can't support the KHz/RTCK. */