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git://git.code.sf.net/p/openocd/code
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fe52282c37
This driver implements a bitbang jtag interface using gpio lines exported via sysfs. The aim of this driver implementation is to use system GPIOs but to avoid the need for an additional kernel driver. A config suitable for RaspberryPi is included. Change-Id: Ib2acf720247a219768d1cbfeebd88057ed2d7b8b Signed-off-by: Marc Reilly <marc@cpdesign.com.au> Reviewed-on: http://openocd.zylin.com/762 Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk> Tested-by: jenkins Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
25 lines
623 B
INI
25 lines
623 B
INI
#
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# Config for using RaspberryPi's expansion header
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#
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# This is best used with a fast enough buffer but also
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# is suitable for direct connection if the target voltage
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# matches RPi's 3.3V
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#
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# Do not forget the GND connection, pin 6 of the expansion header.
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#
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interface sysfsgpio
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# This has no effect on the driver, but is required
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adapter_khz 100
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# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
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# Header pin numbers: 23 22 19 21
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sysfsgpio_jtag_nums 11 25 10 9
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# At least one of srst or trst needs to be specified
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# Header pin numbers: TRST - 26, SRST - 18
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sysfsgpio_trst_num 7
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# sysfsgpio_srst_num 24
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