X-Git-Url: http://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fjtag%2F__init__.py;fp=decoders%2Fjtag%2F__init__.py;h=047e54a86530aa19d369cd8692f37ef71b7f8c3e;hp=16cf6c6d31bffe883858c1e114a720f0edf4bb53;hb=4c3b1846c9c307c1c35f86d259ddb968ed92718d;hpb=37e4c724efa64dd6061f7bb83f126b81da949771 diff --git a/decoders/jtag/__init__.py b/decoders/jtag/__init__.py index 16cf6c6..047e54a 100644 --- a/decoders/jtag/__init__.py +++ b/decoders/jtag/__init__.py @@ -19,34 +19,10 @@ ## ''' -JTAG protocol decoder. - JTAG (Joint Test Action Group), a.k.a. "IEEE 1149.1: Standard Test Access Port and Boundary-Scan Architecture", is a protocol used for testing, debugging, and flashing various digital ICs. -TODO: Protocol details. - -Protocol output format (WORK IN PROGRESS!): - -JTAG packet: -[, ] - - is one of: - - 'NEW STATE': is the new state of the JTAG state machine. - Valid values: 'TEST-LOGIC-RESET', 'RUN-TEST/IDLE', 'SELECT-DR-SCAN', - 'CAPTURE-DR', 'SHIFT-DR', 'EXIT1-DR', 'PAUSE-DR', 'EXIT2-DR', 'UPDATE-DR', - 'SELECT-IR-SCAN', 'CAPTURE-IR', 'SHIFT-IR', 'EXIT1-IR', 'PAUSE-IR', - 'EXIT2-IR', 'UPDATE-IR'. - - 'IR TDI': Bitstring that was clocked into the IR register. - - 'IR TDO': Bitstring that was clocked out of the IR register. - - 'DR TDI': Bitstring that was clocked into the DR register. - - 'DR TDO': Bitstring that was clocked out of the DR register. - - ... - -All bitstrings are a sequence of '1' and '0' characters. The right-most -character in the bitstring is the LSB. Example: '01110001' (1 is LSB). - Details: https://en.wikipedia.org/wiki/Joint_Test_Action_Group http://focus.ti.com/lit/an/ssya002c/ssya002c.pdf