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Add TCK padding in the OSCAN1 reset/online/activate sequence. (#406)

bscan_optimization
Greg Savin 2019-09-13 12:50:36 -07:00 committed by GitHub
parent 11e6127401
commit c5bb7fb230
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1 changed files with 14 additions and 0 deletions
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14
src/jtag/drivers/ftdi.c
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@ -927,6 +927,20 @@ static void oscan1_reset_online_activate(void)
/* TCK=0, TMS=1, TDI=0 (falling edge TCK with TMSC still 0) */
{'0', '1', '0'},
/* 3 TCK pulses for padding */
/* TCK=1, TMS=1, TDI=0 (drive rising TCK edge) */
{'1', '1', '0'},
/* TCK=0, TMS=1, TDI=0 (drive falling TCK edge) */
{'0', '1', '0'},
/* TCK=1, TMS=1, TDI=0 (drive rising TCK edge) */
{'1', '1', '0'},
/* TCK=0, TMS=1, TDI=0 (drive falling TCK edge) */
{'0', '1', '0'},
/* TCK=1, TMS=1, TDI=0 (drive rising TCK edge) */
{'1', '1', '0'},
/* TCK=0, TMS=1, TDI=0 (drive falling TCK edge) */
{'0', '1', '0'},
/* Drive cJTAG escape sequence for SELECT */
/* TCK=1, TMS=1, TDI=0 (rising edge of TCK with TMSC still 0, TAP reset that was just setup occurs here too) */
{'1', '1', '0'},