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/* SimTrace TC (Timer / Clock) support code
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*------------------------------------------------------------------------------
* Headers
*------------------------------------------------------------------------------*/
#include "board.h"
#include <string.h>
//FIXME:
static const Pin pTC[] = {{PIO_PA4B_TCLK0, PIO_PA0B_TIOA0, PIO_PA1B_TIOB0}};
/** Global timestamp in milliseconds since start of application */
volatile uint32_t dwTimeStamp = 0;
volatile uint8_t timeout_occured = 0;
// FIXME: Do I need the function?:
/**
* \brief Handler for Sytem Tick interrupt.
*
* Process System Tick Event
* Increments the timestamp counter.
*/
void SysTick_Handler( void )
{
dwTimeStamp ++;
}
void TC0_IrqHandler( void )
{
volatile uint32_t dummy;
/* Clear status bit to acknowledge interrupt */
dummy = TC0->TC_CHANNEL[ 0 ].TC_SR;
timeout_occured++;
// printf("++++ TC0_Irq %d\n\r", timeout_occured);
}
void TC0_Counter_Reset( void )
{
TC0->TC_CHANNEL[ 0 ].TC_CCR = TC_CCR_SWTRG ;
timeout_occured = 0;
}
/* == Timeouts ==
* One symbol is about 2ms --> Timeout = BUFLEN * 2ms ?
* For BUFLEN = 64 that is 7.8 Hz
*/
void Timer_Init()
{
uint32_t div;
uint32_t tcclks;
/** Enable peripheral clock. */
PMC_EnablePeripheral(ID_TC0);
/** Configure TC for a $ARG1 Hz frequency and trigger on RC compare. */
TC_FindMckDivisor( 8, BOARD_MCK, &div, &tcclks, BOARD_MCK );
TRACE_INFO("Chosen div, tcclk: %d, %d\r\n", div, tcclks);
/* TC_CMR: TC Channel Mode Register: Capture Mode */
/* CPCTRG: RC Compare resets the counter and starts the counter clock. */
TC_Configure( TC0, 0, tcclks | TC_CMR_CPCTRG );
/* TC_RC: TC Register C: contains the Register C value in real time. */
TC0->TC_CHANNEL[ 0 ].TC_RC = ( BOARD_MCK / div ) / 4;
/* Configure and enable interrupt on RC compare */
NVIC_EnableIRQ( (IRQn_Type)ID_TC0 );
TC0->TC_CHANNEL[ 0 ].TC_IER = TC_IER_CPCS; /* CPCS: RC Compare */
TC_Start( TC0, 0 );
return;
/*** From here on we have code based on old simtrace code */
/* Cfg PA4(TCLK0), PA0(TIOA0), PA1(TIOB0) */
PIO_Configure( pTC, PIO_LISTSIZE( pTC ) );
// FIXME:
// PIO_ConfigureIt( &pinPhoneRST, ISR_PhoneRST ) ;
// PIO_EnableIt( &pinPhoneRST ) ;
/* enable interrupts for Compare-C and External Trigger */
TC0->TC_CHANNEL[0].TC_IER = TC_IER_CPCS | TC_IER_ETRGS;
//...
/* Enable master clock for TC0 */
// TC0->TC_CHANNEL[0].TC_CCR
/* Reset to start timers */
//...
}
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