diff options
| author | Joshua Wise <joshua@joshuawise.com> | 2014-05-16 01:08:43 -0700 |
|---|---|---|
| committer | Andreas Fritiofson <andreas.fritiofson@gmail.com> | 2014-06-22 08:32:13 +0000 |
| commit | dd4e3a2406f97e19487aaaecbaaa3c542169e7af (patch) | |
| tree | d68b0e5f6e48943600d6d55ffb3cb4d12f127746 /src | |
| parent | f9e82f3ffb5dcf6a11770a79b193812f94de8582 (diff) | |
svf: Only read TDO back from the device if we actually need to look at the bits.
This results in a 90% speedup on USB-Blaster, which serializes repeated
TDI input against TDO readback; program time on an 5CGXFC5C6F27 part was
dropped from 2m30s to 9s.
Signed-off-by: Joshua Wise <joshua@joshuawise.com>
Change-Id: I92d5a8b800492283d619328549235b610528c338
Reviewed-on: http://openocd.zylin.com/2145
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Diffstat (limited to 'src')
| -rw-r--r-- | src/svf/svf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/svf/svf.c b/src/svf/svf.c index ac7c2c68..0d37c8ff 100644 --- a/src/svf/svf.c +++ b/src/svf/svf.c @@ -1171,7 +1171,7 @@ XXR_common: svf_add_check_para(0, svf_buffer_index, i); field.num_bits = i; field.out_value = &svf_tdi_buffer[svf_buffer_index]; - field.in_value = &svf_tdi_buffer[svf_buffer_index]; + field.in_value = (xxr_para_tmp->data_mask & XXR_TDO) ? &svf_tdi_buffer[svf_buffer_index] : NULL; if (!svf_nil) { /* NOTE: doesn't use SVF-specified state paths */ jtag_add_plain_dr_scan(field.num_bits, @@ -1261,7 +1261,7 @@ XXR_common: svf_add_check_para(0, svf_buffer_index, i); field.num_bits = i; field.out_value = &svf_tdi_buffer[svf_buffer_index]; - field.in_value = &svf_tdi_buffer[svf_buffer_index]; + field.in_value = (xxr_para_tmp->data_mask & XXR_TDO) ? &svf_tdi_buffer[svf_buffer_index] : NULL; if (!svf_nil) { /* NOTE: doesn't use SVF-specified state paths */ jtag_add_plain_ir_scan(field.num_bits, |