FreeCalypso > hg > fc-magnetite
view fcdev3b-hacks/src/romvecs-insert.S @ 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 | 8d9298e0823a |
children |
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.text .code 32 .globl _entry _entry: adr r0, vectors ldmia r0, {r1-r7} mov r0, #0x800000 stmia r0, {r1-r7} ldr pc, jumpaddr vectors: .word 0x4000 .word 0x4004 .word 0x4008 .word 0x400C .word 0x4010 .word 0x4014 .word 0x4018 jumpaddr: .word 0x4058