ftdi swd: disable SWD output pin during input
* Disables the data output pin while SWD is reading, so that a simple FTDI SWD interface can be made by connecting TCK to SWD_CLK and TDI+TDO directly to SWDIO. Enabled by setting SWDIO_OE to 0. Change-Id: I7d3b71cf3f4eea163cb320aff69ed95d219190bd Signed-off-by: Patrick Stewart <patstew@gmail.com> Signed-off-by: Roger Lendenmann <roger.lendenmann@intel.com> Reviewed-on: http://openocd.zylin.com/2274 Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Tested-by: jenkins
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Patrick Stewart
Paul Fertser
parent
ab25205bbf
commit
1003bc7be7
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@ -1064,8 +1064,19 @@ static int ftdi_swd_init(void)
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static void ftdi_swd_swdio_en(bool enable)
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{
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struct signal *oe = find_signal_by_name("SWDIO_OE");
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if (oe)
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ftdi_set_signal(oe, enable ? '1' : '0');
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if (oe) {
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if (oe->data_mask)
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ftdi_set_signal(oe, enable ? '1' : '0');
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else {
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/* Sets TDI/DO pin (pin 2) to input during rx when both pins are connected
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to SWDIO */
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if (enable)
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direction |= jtag_direction_init & 0x0002U;
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else
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direction &= ~0x0002U;
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mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
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}
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}
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}
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/**
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@ -0,0 +1,11 @@
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#
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# nordic module NRF52 (nRF52832/52840) attached to an adafruit ft232h module
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# or any FT232H/FT2232H/FT4232H based board/module
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#
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source [find interface/ftdi/ft232h-module-swd.cfg]
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#source [find interface/ftdi/minimodule-swd.cfg]
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transport select swd
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source [find target/nrf52.cfg]
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@ -0,0 +1,52 @@
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#
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# ADAFRUIT FTDI FT232H as a SWD direct connect interface
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# Any FT232H based board may work
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#
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# http://www.ftdichip.com/Products/ICs/FT232H.htm
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#
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#
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interface ftdi
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ftdi_vid_pid 0x0403 0x6014
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# data MSB..LSB direction (1:out) MSB..LSB
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# 0000'0000'0011'0000 0000'0000'0011'1011
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ftdi_layout_init 0x0030 0x003b
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# 0xfff8 0xfffb
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# Those signal are only required on some platforms or may required to be
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# enabled explicitely (e.g. nrf5x chips).
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ftdi_layout_signal nSRST -data 0x0010 -oe 0x0010
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ftdi_layout_signal nTRST -data 0x0020 -oe 0x0020
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# swd enable
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ftdi_layout_signal SWD_EN -data 0
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# tri-state (configure as input) TDO/TIO when reading
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ftdi_layout_signal SWDIO_OE -data 0
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transport select swd
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# re-configure TDO as tri-state
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#ftdi_layout_signal TDO -data 0x0002 -oe 0x0002
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#ftdi_layout_signal TDI -data 0x0004
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# Adafruit FT232H JTAG SWD
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# Name Pin Name Func Func
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# D0 J1-3 ADBUS0 TCK SWDCLK
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# D1 J1-4 ADBUS1 TDO/DI SWDIO
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# D2 J1-5 ADBUS2 TDI/DO SWDIO
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# D3 J1-6 ADBUS3 TMS N/A
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# D4 J1-7 ADBUS4 (GPIOL0) /nSRST optional module reset
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# D5 J1-8 ADBUS5 (GPIOL1) /nTRST optional target reset
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# D6 J1-9 ADBUS6 (GPIOL2)
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# D7 J1-10 ADBUS7 (GPIOL3)
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# C0 J2-1 ACBUS0 (GPIOH0)
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# C1 J2-2 ACBUS1 (GPIOH1)
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# C2 J2-3 ACBUS2 (GPIOH2)
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# C3 J2-4 ACBUS3 (GPIOH3)
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# C4 J2-5 ACBUS4 (GPIOH4)
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# C5 J2-6 ACBUS5 (GPIOH5)
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# C6 J2-7 ACBUS6 (GPIOH6)
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# C7 J2-8 ACBUS7 (GPIOH7)
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# C8 J2-9 ACBUS8
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# C9 J2-10 ACBUS9
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@ -0,0 +1,54 @@
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#
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Supports SWD using the FT2232H or FT4232H minimodule.
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# Each can support 2 SWD interfaces.
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#
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# FT2232H or FT4232H minimodule channel 0 (Channel A)
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# Connector FTDI Target
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# Pin Name
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# --------- ------ ------
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# CN2-11 VIO VDD_IO (Or connect to CN2-5 on the minimodule instead for a 3V3 interface)
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# CN2-2 GND GND
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# CN2-7 ADBUS0 (TCK) SWCLK
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# CN2-9 ADBUS2 (TDI/TDO) SWDIO
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# CN2-10 ADBUS1 (TDO/TDI) SWDIO
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# CN2-14 ADBUS4 (GPIOL0) nRESET
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#
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# FT2232H minimodule channel 1 (Channel B)
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# FTDI Target
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# ---- ------
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# CN2-11 - VDD_IO
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# CN2-2 - GND
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# CN3-26 - SWCLK
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# CN3-25 - SWDIO
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# CN3-24 - SWDIO
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# CN3-21 - nRESET
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#
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# FT4232H minimodule channel 1 (Channel B)
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# FTDI Target
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# ---- ------
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# CN2-11 - VDD_IO
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# CN2-2 - GND
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# CN2-18 - SWCLK
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# CN2-17 - SWDIO
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# CN2-20 - SWDIO
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# CN2-22 - nRESET
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#
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interface ftdi
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#Select your module type and channel
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#ftdi_device_desc "FT2232H MiniModule"
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ftdi_vid_pid 0x0403 0x6010
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#ftdi_channel 1
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#ftdi_device_desc "FT4232H MiniModule"
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#ftdi_vid_pid 0x0403 0x6011
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#ftdi_channel 1
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ftdi_layout_init 0x0000 0x000b
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ftdi_layout_signal nSRST -data 0x0010 -oe 0x0010
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ftdi_layout_signal SWD_EN -data 0
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ftdi_layout_signal SWDIO_OE -data 0
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transport select swd
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