FreeCalypso > hg > fc-magnetite
view blobs/patches/frame_na7_db_ir-systrace.patch @ 680:ee3ac8c617cb
armio.c: set GPIO2 output high initially
On TI-canonical platforms GPIO2 is DCD modem control output. In TI's
original code the AI_InitIOConfig() function called from Init_Target()
would configure GPIO2 as an output and set the initial output value to
low, but then the init code in uartfax.c called from Init_Serial_Flows()
would immediately change it to high, corresponding to DCD not asserted.
The result is a momentary asserted-state glitch on the DCD output.
The present change eliminates this glitch, setting DCD output to
not-asserted initially like it should be.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 25 Jun 2020 03:17:43 +0000 |
parents | acb07ce22054 |
children |
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line source
# TI's original version of the pf_TaskEntry() function in the guts of GPF # does this number once all GPF tasks have entered their main loop: # # TraceMask[0] = 0; # # The effect of this line is that "system" trace output gets disabled; # in particular, "system primitive" requests like querying for existing # TRACECLASS of various entities or for the GPF version elicit no response # whatsoever until one sends a TRACECLASS setting sysprim which restores # the TC_SYSTEM bit in TraceMask[0]. # # In FreeCalypso we consider this clearing of TraceMask[0] to be either # a bug or a misfeature, and we would like to change it. In the case of # the GPF code in question, we do have a copy of frame.c source (the module # where the offending pf_TaskEntry() function is implemented) which we believe # is the same code as what's in the TCS211 version of GPF, but TCS211 is not # set up to recompile any part of GPF from source, and there are other modules # in the same frame_na7_db_ir.lib for which we don't have the original source # (os_*), hence it is easier to do a binary lib patch. # # The present patch is a binary form of: # # -TraceMask[0] = 0; # +TraceMask[0] = TC_SYSTEM; [frame.obj] .text 2ee 10