From 1003bc7be7c471d28794280be69632c5f074789f Mon Sep 17 00:00:00 2001 From: Patrick Stewart Date: Wed, 27 Aug 2014 17:17:27 +0100 Subject: [PATCH] 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 Signed-off-by: Roger Lendenmann Reviewed-on: http://openocd.zylin.com/2274 Reviewed-by: Andreas Fritiofson Tested-by: jenkins --- src/jtag/drivers/ftdi.c | 15 ++++++- tcl/board/nordic_nrf52_ftx232.cfg | 11 +++++ tcl/interface/ftdi/ft232h-module-swd.cfg | 52 +++++++++++++++++++++++ tcl/interface/ftdi/minimodule-swd.cfg | 54 ++++++++++++++++++++++++ 4 files changed, 130 insertions(+), 2 deletions(-) create mode 100644 tcl/board/nordic_nrf52_ftx232.cfg create mode 100644 tcl/interface/ftdi/ft232h-module-swd.cfg create mode 100644 tcl/interface/ftdi/minimodule-swd.cfg diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c index 32876bac..e69707e5 100644 --- a/src/jtag/drivers/ftdi.c +++ b/src/jtag/drivers/ftdi.c @@ -1064,8 +1064,19 @@ static int ftdi_swd_init(void) static void ftdi_swd_swdio_en(bool enable) { struct signal *oe = find_signal_by_name("SWDIO_OE"); - if (oe) - ftdi_set_signal(oe, enable ? '1' : '0'); + if (oe) { + if (oe->data_mask) + ftdi_set_signal(oe, enable ? '1' : '0'); + else { + /* Sets TDI/DO pin (pin 2) to input during rx when both pins are connected + to SWDIO */ + if (enable) + direction |= jtag_direction_init & 0x0002U; + else + direction &= ~0x0002U; + mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff); + } + } } /** diff --git a/tcl/board/nordic_nrf52_ftx232.cfg b/tcl/board/nordic_nrf52_ftx232.cfg new file mode 100644 index 00000000..938efeda --- /dev/null +++ b/tcl/board/nordic_nrf52_ftx232.cfg @@ -0,0 +1,11 @@ +# +# nordic module NRF52 (nRF52832/52840) attached to an adafruit ft232h module +# or any FT232H/FT2232H/FT4232H based board/module +# + +source [find interface/ftdi/ft232h-module-swd.cfg] +#source [find interface/ftdi/minimodule-swd.cfg] + +transport select swd + +source [find target/nrf52.cfg] diff --git a/tcl/interface/ftdi/ft232h-module-swd.cfg b/tcl/interface/ftdi/ft232h-module-swd.cfg new file mode 100644 index 00000000..d2bd1da6 --- /dev/null +++ b/tcl/interface/ftdi/ft232h-module-swd.cfg @@ -0,0 +1,52 @@ +# +# ADAFRUIT FTDI FT232H as a SWD direct connect interface +# Any FT232H based board may work +# +# http://www.ftdichip.com/Products/ICs/FT232H.htm +# +# + +interface ftdi + +ftdi_vid_pid 0x0403 0x6014 + +# data MSB..LSB direction (1:out) MSB..LSB +# 0000'0000'0011'0000 0000'0000'0011'1011 +ftdi_layout_init 0x0030 0x003b +# 0xfff8 0xfffb +# Those signal are only required on some platforms or may required to be +# enabled explicitely (e.g. nrf5x chips). +ftdi_layout_signal nSRST -data 0x0010 -oe 0x0010 +ftdi_layout_signal nTRST -data 0x0020 -oe 0x0020 + +# swd enable +ftdi_layout_signal SWD_EN -data 0 +# tri-state (configure as input) TDO/TIO when reading +ftdi_layout_signal SWDIO_OE -data 0 + +transport select swd + +# re-configure TDO as tri-state +#ftdi_layout_signal TDO -data 0x0002 -oe 0x0002 +#ftdi_layout_signal TDI -data 0x0004 + +# Adafruit FT232H JTAG SWD +# Name Pin Name Func Func +# D0 J1-3 ADBUS0 TCK SWDCLK +# D1 J1-4 ADBUS1 TDO/DI SWDIO +# D2 J1-5 ADBUS2 TDI/DO SWDIO +# D3 J1-6 ADBUS3 TMS N/A +# D4 J1-7 ADBUS4 (GPIOL0) /nSRST optional module reset +# D5 J1-8 ADBUS5 (GPIOL1) /nTRST optional target reset +# D6 J1-9 ADBUS6 (GPIOL2) +# D7 J1-10 ADBUS7 (GPIOL3) +# C0 J2-1 ACBUS0 (GPIOH0) +# C1 J2-2 ACBUS1 (GPIOH1) +# C2 J2-3 ACBUS2 (GPIOH2) +# C3 J2-4 ACBUS3 (GPIOH3) +# C4 J2-5 ACBUS4 (GPIOH4) +# C5 J2-6 ACBUS5 (GPIOH5) +# C6 J2-7 ACBUS6 (GPIOH6) +# C7 J2-8 ACBUS7 (GPIOH7) +# C8 J2-9 ACBUS8 +# C9 J2-10 ACBUS9 diff --git a/tcl/interface/ftdi/minimodule-swd.cfg b/tcl/interface/ftdi/minimodule-swd.cfg new file mode 100644 index 00000000..5f0b212f --- /dev/null +++ b/tcl/interface/ftdi/minimodule-swd.cfg @@ -0,0 +1,54 @@ +# +Supports SWD using the FT2232H or FT4232H minimodule. +# Each can support 2 SWD interfaces. +# +# FT2232H or FT4232H minimodule channel 0 (Channel A) +# Connector FTDI Target +# Pin Name +# --------- ------ ------ +# CN2-11 VIO VDD_IO (Or connect to CN2-5 on the minimodule instead for a 3V3 interface) +# CN2-2 GND GND +# CN2-7 ADBUS0 (TCK) SWCLK +# CN2-9 ADBUS2 (TDI/TDO) SWDIO +# CN2-10 ADBUS1 (TDO/TDI) SWDIO +# CN2-14 ADBUS4 (GPIOL0) nRESET +# +# FT2232H minimodule channel 1 (Channel B) +# FTDI Target +# ---- ------ +# CN2-11 - VDD_IO +# CN2-2 - GND +# CN3-26 - SWCLK +# CN3-25 - SWDIO +# CN3-24 - SWDIO +# CN3-21 - nRESET +# +# FT4232H minimodule channel 1 (Channel B) +# FTDI Target +# ---- ------ +# CN2-11 - VDD_IO +# CN2-2 - GND +# CN2-18 - SWCLK +# CN2-17 - SWDIO +# CN2-20 - SWDIO +# CN2-22 - nRESET +# + +interface ftdi + +#Select your module type and channel + +#ftdi_device_desc "FT2232H MiniModule" +ftdi_vid_pid 0x0403 0x6010 +#ftdi_channel 1 + +#ftdi_device_desc "FT4232H MiniModule" +#ftdi_vid_pid 0x0403 0x6011 +#ftdi_channel 1 + +ftdi_layout_init 0x0000 0x000b +ftdi_layout_signal nSRST -data 0x0010 -oe 0x0010 +ftdi_layout_signal SWD_EN -data 0 +ftdi_layout_signal SWDIO_OE -data 0 + +transport select swd -- 2.39.5