firmware/target/arm/tms320dm320/kernel-dm320.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Karl Kurbjun
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "kernel.h"
  25 #include "timer.h"
  26 #include "thread.h"
  27
  28 void tick_start(unsigned int interval_in_ms)
  29 {
  30 /*    TODO: set up TIMER1 clock settings
  31     IO_CLK_MOD2 &= ~CLK_MOD2_TMR1; //disable TIMER1 clock
  32     IO_CLK_SEL0 |= (1 << 2); //set TIMER1 clock to PLLIN*/
  33     IO_CLK_MOD2 |= CLK_MOD2_TMR1; //enable TIMER1 clock!!!!!!!!!
  34     IO_TIMER1_TMMD = CONFIG_TIMER1_TMMD_STOP;
  35
  36     /*  Setup the Prescalar (Divide by 10)
  37      *  Based on linux/include/asm-arm/arch-integrator/timex.h
  38      */
  39     IO_TIMER1_TMPRSCL = 0x0009;
  40
  41     /* Setup the Divisor */
  42     IO_TIMER1_TMDIV = (TIMER_FREQ / (10*1000))*interval_in_ms - 1;
  43
  44     /* Turn Timer1 to Free Run mode */
  45     IO_TIMER1_TMMD = CONFIG_TIMER1_TMMD_FREE_RUN;
  46
  47     /* Enable the interrupt */
  48     IO_INTC_EINT0 |= INTR_EINT0_TMR1;
  49 }
  50
  51 void TIMER1(void)
  52 {
  53     IO_INTC_IRQ0 = INTR_IRQ0_TMR1;
  54
  55     /* Run through the list of tick tasks */
  56     call_tick_tasks();
  57 }