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base repository: whitequark/glasgow
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head repository: whitequark/glasgow
compare: 9cc3d9a48161
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  • 3 commits
  • 2 files changed
  • 1 contributor

Commits on Feb 26, 2019

  1. applet.jtag_mips: reset Rocc before entering probe mode. 

    Otherwise all our writes will just get ignored.

This commit also adds detection of unexpected core reset.
    @whitequark
    whitequark committed Feb 26, 2019
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Commits on Feb 27, 2019

  1. applet.jtag: reset TAP chain before selecting a TAP. 

    Selecting a TAP requires reading IDCODE/BYPASS from DR, which means
that a TAP chain reset was a precondition for select_tap(), but this
wasn't intended or documented. The current design requires a reset,
so just add that.

Since all derived applets want to select a TAP, remove the TAP reset
via TMS from run(); however, keep TAP reset via TRST#, because that
enables the TRST# driver.
    @whitequark
    whitequark committed Feb 27, 2019
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  2. applet.jtag: enumerate-ir: handle incorrect TAP selection.

    @whitequark
    whitequark committed Feb 27, 2019
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