FreeCalypso > hg > fc-magnetite
view blobs/patches/main-fchw.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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# This patch applies to the Init_Target() function in the init.obj module in # main.lib; it is an example of how this code will need to be patched for # running on our own future FreeCalypso hardware if we choose to use the same # Spansion S71PL129NC0 flash+pSRAM MCP as used in the Pirelli DP-L10 and use # the same memory timings as set by Pirelli's firmware. [init.obj] # value goes into nCS0, nCS1 and nCS3 config registers .text 66 A4 # value goes into nCS2 config reg .text 6C A4 # nop out the write into 0x02700000 .text 128 C0 .text 129 46