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nds32: Avoid detected JTAG clock 

AICE2 doesn't support scan for the maximum clock frequency of
JTAG chain. It will cause USB command timeout.

Change-Id: I41d1e3be387b6ed5a4dd0be663385a5f053fbcf9
Signed-off-by: Hellosun Wu <wujiheng.tw@gmail.com>
Reviewed-on: http://openocd.zylin.com/4292
Tested-by: jenkins
Reviewed-by: Hsiangkai Wang <hsiangkai@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
bscan_tunnel
Hellosun Wu 2017-11-08 17:04:11 +08:00 committed by Tomas Vanek
parent 84b571f667
commit e36c2f2da4
2 changed files with 28 additions and 25 deletions
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2
src/jtag/aice/aice_usb.c
View File

@ -2289,6 +2289,7 @@ get_delay:
static int aice_usb_set_clock(int set_clock)
{
if (set_clock & AICE_TCK_CONTROL_TCK_SCAN) {
if (aice_write_ctrl(AICE_WRITE_CTRL_TCK_CONTROL,
AICE_TCK_CONTROL_TCK_SCAN) != ERROR_OK)
return ERROR_FAIL;
@ -2321,6 +2322,7 @@ static int aice_usb_set_clock(int set_clock)
LOG_ERROR("User specifies higher jtag clock than TCK_SCAN clock");
return ERROR_FAIL;
}
}
if (aice_write_ctrl(AICE_WRITE_CTRL_TCK_CONTROL, set_clock) != ERROR_OK)
return ERROR_FAIL;

1
src/jtag/aice/aice_usb.h
View File

@ -71,6 +71,7 @@
/* Constants for AICE command WRITE_CTRL:TCK_CONTROL */
#define AICE_TCK_CONTROL_TCK3048 0x08
#define AICE_TCK_CONTROL_TCK_SCAN 0x10
/* Constants for AICE command WRITE_CTRL:JTAG_PIN_CONTROL */
#define AICE_JTAG_PIN_CONTROL_SRST 0x01