firmware/src/os/trigger.c

   1 /* AT91SAM7 Trigger output routines for OpenPCD / OpenPICC
   2  * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20 #include <lib_AT91SAM7.h>
  21 #include <os/trigger.h>
  22 #include "../openpcd.h"
  23
  24 void trigger_init(void)
  25 {
  26         AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
  27 }
  28
  29 void trigger_pulse(void)
  30 {
  31         volatile int i;
  32         AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
  33         for (i=0; i < 0xff; i++)
  34                 { }
  35         AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
  36 }