f0767a316a
Mostly trivial fixes spotted by spell checker Change-Id: I3af693faf5506c866e2abe253a0e37aea3c4d284 Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: http://openocd.zylin.com/4510 Tested-by: jenkins Reviewed-by: Christopher Head <chead@zaber.com> Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
54 lines
1.4 KiB
Plaintext
54 lines
1.4 KiB
Plaintext
/** @remote_bitbangpage OpenOCD Developer's Guide
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The remote_bitbang JTAG driver is used to drive JTAG from a remote process. The
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remote_bitbang driver communicates via TCP or UNIX sockets with some remote
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process using an ASCII encoding of the bitbang interface. The remote process
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presumably then drives the JTAG however it pleases. The remote process should
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act as a server, listening for connections from the openocd remote_bitbang
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driver.
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The remote bitbang driver is useful for debugging software running on
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processors which are being simulated.
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The bitbang interface consists of the following functions.
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blink on
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Blink a light somewhere. The argument on is either 1 or 0.
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read
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Sample the value of tdo.
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write tck tms tdi
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Set the value of tck, tms, and tdi.
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reset trst srst
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Set the value of trst, srst.
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An additional function, quit, is added to the remote_bitbang interface to
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indicate there will be no more requests and the connection with the remote
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driver should be closed.
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These five functions are encoded in ASCII by assigning a single character to
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each possible request. The assignments are:
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B - Blink on
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b - Blink off
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R - Read request
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Q - Quit request
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0 - Write 0 0 0
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1 - Write 0 0 1
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2 - Write 0 1 0
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3 - Write 0 1 1
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4 - Write 1 0 0
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5 - Write 1 0 1
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6 - Write 1 1 0
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7 - Write 1 1 1
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r - Reset 0 0
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s - Reset 0 1
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t - Reset 1 0
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u - Reset 1 1
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The read response is encoded in ASCII as either digit 0 or 1.
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*/
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