+
−/*******************************************************************************
+
−            TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION           
+
−                                                                             
+
−   Property of Texas Instruments -- For  Unrestricted  Internal  Use  Only 
+
−   Unauthorized reproduction and/or distribution is strictly prohibited.  This 
+
−   product  is  protected  under  copyright  law  and  trade  secret law as an 
+
−   unpublished work.  Created 1987, (C) Copyright 1997 Texas Instruments.  All 
+
−   rights reserved.                                                            
+
−                  
+
−                                                           
+
−   Filename         : timer.c
+
−
+
−   Description      : timer.c
+
−
+
−   Project          : drivers
+
−
+
−   Author           : pmonteil@tif.ti.com  Patrice Monteil.
+
−
+
−   Version number   : 1.3
+
−
+
−   Date and time    : 07/23/98 16:25:32
+
−   Previous delta   : 07/23/98 16:25:32
+
−
+
−   SCCS file        : /db/gsm_asp/db_ht96/dsp_0/gsw/rel_0/mcu_l1/release1.5/mod/emu/EMU_MCMP/eva3_drivers/source/SCCS/s.timer.c
+
−
+
−   Sccs Id  (SID)       : '@(#) timer.c 1.3 07/23/98 16:25:32 '
+
−
+
− 
+
−*****************************************************************************/
+
−
+
−#include "l1sw.cfg"
+
−
+
−#if (OP_L1_STANDALONE == 0)
+
−  #include "main/sys_types.h"
+
−#else
+
−  #include "sys_types.h"
+
−#endif
+
−#include "memif/mem.h"
+
−#include "inth/iq.h"
+
−#include "timer.h"
+
−
+
−
+
−/*--------------------------------------------------------------
+
− *  TIMER_Read()
+
− *--------------------------------------------------------------
+
− * Parameters :	num of the register to be read
+
− * Return     :value of the timer register read
+
− * Functionality :  read one of the TIMER register
+
− *--------------------------------------------------------------*/
+
−SYS_UWORD16 TIMER_Read (unsigned short regNum)
+
−{
+
−   volatile SYS_UWORD16 timerReg;
+
−
+
−   switch (regNum) {
+
−   case 0:
+
−      timerReg = (( * (SYS_UWORD16 *) TIMER_CNTL_REG) & TIMER_CNTL_MASK);
+
−      break;
+
−   case 1:
+
−      timerReg = ( * (SYS_UWORD16 *) TIMER_READ_REG);
+
−      break;
+
−   case 2:
+
−      timerReg = (( * (SYS_UWORD16 *) TIMER_MODE_REG) & TIMER_MODE_MASK);
+
−      break;
+
−   default:
+
−       break;
+
−   }
+
−   return(timerReg);
+
−}
+
−/*--------------------------------------------------------------
+
− *  TM_ResetTimer()
+
− *--------------------------------------------------------------
+
− * Parameters : timer number (1 or 2) 
+
− *              timer value, reload yes or not, scale
+
− * Return     : none
+
− * Functionality : Give the timewr state
+
− *--------------------------------------------------------------*/
+
−void  TM_ResetTimer (SYS_UWORD16 timerNum,  SYS_UWORD16 countValue, 
+
−                     SYS_UWORD16 autoReload, SYS_UWORD16 clockScale)
+
−{
+
−     volatile SYS_UWORD16 *cntl;
+
−    
+
−    if (timerNum == 1) 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL; 
+
−
+
−        *cntl &= ~(START_STOP | PTV);        /* stop and reset values */
+
−
+
−        (autoReload) ? (*cntl |= AR) : (*cntl &= ~AR);
+
−
+
−        *cntl |= (clockScale << 2 );
+
−
+
−
+
−        * (SYS_UWORD16 *) TIMER1_LOAD_TIM = countValue;  /*load the value */
+
−
+
−        *cntl |= START_STOP;    
+
−    }
+
−    else 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL; 
+
−
+
−        *cntl &= ~(START_STOP | PTV);        /* stop and reset values */
+
−
+
−        (autoReload) ? (*cntl |= AR) : (*cntl &= ~AR);
+
−
+
−        *cntl |= (clockScale << 2 );
+
−         
+
−
+
−        * (SYS_UWORD16 *) TIMER2_LOAD_TIM = countValue;  /*load the value */
+
−
+
−        *cntl |= START_STOP;    
+
−    }
+
−}
+
−
+
−/*
+
− *  TM_StopTimer
+
− *
+
− * Parameters : timer number (1 or 2)
+
− */
+
−void   TM_StopTimer (int timerNum)
+
−{
+
−
+
−    volatile SYS_UWORD16 *cntl;
+
−    
+
−    if (timerNum == 1) 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
+
−    }
+
−    else
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
+
−    }
+
−    *cntl &= ~START_STOP;
+
−
+
−}   
+
−
+
−/*
+
− * TM_ReadTimer
+
− *
+
− * Returns current timer value
+
− *
+
− * Parameters : timer number (1 or 2)
+
− *
+
− */
+
−SYS_UWORD16 TM_ReadTimer (int timerNum)
+
−{
+
−    if (timerNum == 1) 
+
−    {
+
−        return (* (SYS_UWORD16 *) TIMER1_READ_TIM);
+
−    }
+
−    else
+
−    {
+
−        return (* (SYS_UWORD16 *) TIMER2_READ_TIM);
+
−    }
+
−}   
+
−
+
−
+
−/*
+
− * TM_StartTimer
+
− *
+
− * Parameters : timer number (1 or 2)
+
− *
+
− */
+
−void TM_StartTimer (int timerNum)
+
−{
+
−    volatile SYS_UWORD16 *cntl;
+
−    
+
−    if (timerNum == 1) 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
+
−    }
+
−    else
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
+
−    }
+
−    *cntl |= START_STOP;
+
−}   
+
−
+
−void TM_DisableWatchdog (void)
+
−{
+
−   /* volatile variable needed due C to optimization */
+
−   volatile SYS_UWORD16 *reg = (volatile SYS_UWORD16 *) TIMER_MODE_REG;
+
−
+
−   *reg = 0xf5;                
+
−   *reg = 0xa0;
+
−}
+
−
+
−
+
− /*
+
− * TM_EnableWatchdog
+
− * 
+
− */
+
−void TM_EnableWatchdog(void)
+
−{
+
−    * ((volatile SYS_UWORD16 *) TIMER_MODE_REG) = TIMER_WDOG;
+
−}
+
−
+
−/*
+
− * TM_ResetWatchdog
+
− * 
+
− * Parameter : Tick count 
+
− * Use a different value each time, otherwise watchdog bites 
+
− */
+
−void TM_ResetWatchdog(SYS_UWORD16 count)
+
−{
+
−  * ((volatile SYS_UWORD16 *) TIMER_LOAD_REG) = count;
+
−}
+
−
+
−/*
+
−* TM_EnableTimer (int TimerNum)
+
−* 
+
−* Parameter : TimerNum : timer to enable (timer1 or timer2)
+
−*
+
−*/
+
−void TM_EnableTimer (int TimerNum)
+
−{
+
−     volatile SYS_UWORD16 *cntl;
+
−    
+
−    if (TimerNum == 1) 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
+
−    }
+
−    else
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
+
−    }
+
−    *cntl |= TIMER_CLK_EN;
+
−
+
−}
+
−
+
−/*
+
−* TM_DisableTimer (int TimerNum)
+
−* 
+
−* Parameter : TimerNum : timer to enable (timer1 or timer2)
+
−*
+
−*/
+
−void TM_DisableTimer (int TimerNum)
+
−{
+
−     volatile SYS_UWORD16 *cntl;
+
−    
+
−    if (TimerNum == 1) 
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
+
−    }
+
−    else
+
−    {
+
−        cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
+
−    }
+
−    *cntl &= ~TIMER_CLK_EN;
+
−}
+
−
+
−/*--------------------------------------------------------------
+
− *  TIMER_ReadValue()
+
− *--------------------------------------------------------------
+
− * Parameters : none
+
− * Return     :	none
+
− * Functionality :  Read timer value
+
− *--------------------------------------------------------------*/
+
−
+
−unsigned short TIMER_ReadValue (void)
+
−{
+
−  return(* (SYS_UWORD16 *) TIMER_READ_REG);
+
− 
+
−}
+
−
+
−/*--------------------------------------------------------------
+
− *  TIMER_WriteValue()
+
− *--------------------------------------------------------------
+
− * Parameters : none
+
− * Return     :	none
+
− * Functionality :  Write timer value
+
− *--------------------------------------------------------------*/
+
−
+
−void TIMER_WriteValue (SYS_UWORD16 value)
+
−{
+
−  * (SYS_UWORD16 *) TIMER_LOAD_REG = value;	/*load the value */
+
− 
+
−}