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| author | Jonas Norling <jonas.norling@cyanconnode.com> | 2017-10-25 11:33:06 +0200 |
|---|---|---|
| committer | Spencer Oliver <spen@spen-soft.co.uk> | 2017-10-27 11:48:36 +0100 |
| commit | 41092636d1a10d7fe55a986f0d5556a4c34b58d2 (patch) | |
| tree | 1f306afcfaee38bc40feb589df69511adac63351 /src | |
| parent | c0881ba2d5752ce747a4f74daf7531662f9360a9 (diff) | |
| download | riscv-openocd-41092636d1a10d7fe55a986f0d5556a4c34b58d2.zip riscv-openocd-41092636d1a10d7fe55a986f0d5556a4c34b58d2.tar.gz riscv-openocd-41092636d1a10d7fe55a986f0d5556a4c34b58d2.tar.bz2 | |
ftdi: Enable SWDIO output before sending data on it
The SWDIO buffer has to be enabled, by setting SWDIO_OE, for data on
SWDIO to reach the target. Explicitly do this before sending the
switch sequences for JTAG-to-SWD, etc.
This makes the code insensitive to the state of SWDIO_OE specified in
ftdi_layout_init. It used to work only on adapters with a non-inverted
SWDIO_OE inited to 1, or inverted SWDIO_OE inited to 0.
Change-Id: I4b9e520ac1c7ce2a437251a05fc036bc68de718e
Signed-off-by: Jonas Norling <jonas.norling@cyanconnode.com>
Reviewed-on: http://openocd.zylin.com/4270
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/jtag/drivers/ftdi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c index 75a3ce4..32876ba 100644 --- a/src/jtag/drivers/ftdi.c +++ b/src/jtag/drivers/ftdi.c @@ -1218,14 +1218,17 @@ static int ftdi_swd_switch_seq(enum swd_special_seq seq) switch (seq) { case LINE_RESET: LOG_DEBUG("SWD line reset"); + ftdi_swd_swdio_en(true); mpsse_clock_data_out(mpsse_ctx, swd_seq_line_reset, 0, swd_seq_line_reset_len, SWD_MODE); break; case JTAG_TO_SWD: LOG_DEBUG("JTAG-to-SWD"); + ftdi_swd_swdio_en(true); mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_swd, 0, swd_seq_jtag_to_swd_len, SWD_MODE); break; case SWD_TO_JTAG: LOG_DEBUG("SWD-to-JTAG"); + ftdi_swd_swdio_en(true); mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_jtag, 0, swd_seq_swd_to_jtag_len, SWD_MODE); break; default: |