mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2014 INRIA
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU Lesser General
|
|
* Public License. See the file LICENSE in the top level directory for more
|
|
* details.
|
|
*/
|
|
|
|
/**
|
|
* @ingroup cpu
|
|
* @{
|
|
*
|
|
* @file hwtimer_msp430_.c
|
|
* @brief MSP430x16xx timer functions
|
|
*
|
|
* @author Oliver Hahm <oliver.hahm@inria.fr>
|
|
* @author Milan Babel <babel@inf.fu-berlin.de>
|
|
* @author Kévin Roussel <Kevin.Roussel@inria.fr>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "cpu.h"
|
|
#include "hwtimer.h"
|
|
#include "hwtimer_arch.h"
|
|
|
|
static uint32_t ticks = 0;
|
|
|
|
extern void (*int_handler)(int);
|
|
extern void timer_unset(short timer);
|
|
extern uint16_t overflow_interrupt[ARCH_MAXTIMERS+1];
|
|
extern uint16_t timer_round;
|
|
|
|
void timerA_init(void)
|
|
{
|
|
volatile unsigned int *ccr;
|
|
volatile unsigned int *ctl;
|
|
ticks = 0; // Set tick counter value to 0
|
|
timer_round = 0; // Set to round 0
|
|
TACTL = TASSEL_1 + TACLR; // Clear the timer counter, set ACLK
|
|
TACTL &= ~TAIFG; // Clear the IFG
|
|
TACTL &= ~TAIE; // Clear the IFG
|
|
|
|
for (int i = 0; i < ARCH_MAXTIMERS; i++) {
|
|
ccr = &TACCR0 + (i);
|
|
ctl = &TACCTL0 + (i);
|
|
*ccr = 0;
|
|
*ctl &= ~(CCIFG);
|
|
*ctl &= ~(CCIE);
|
|
}
|
|
|
|
TACTL |= MC_2;
|
|
}
|
|
|
|
interrupt(TIMERA0_VECTOR) __attribute__((naked)) timer_isr_ccr0(void)
|
|
{
|
|
__enter_isr();
|
|
timer_round += 1;
|
|
__exit_isr();
|
|
|
|
}
|
|
|
|
interrupt(TIMERA1_VECTOR) __attribute__((naked)) timer_isr(void)
|
|
{
|
|
__enter_isr();
|
|
|
|
short taiv = TAIV;
|
|
|
|
if (taiv & TAIV_TAIFG) {
|
|
} else {
|
|
|
|
short timer = (taiv/2);
|
|
if(overflow_interrupt[timer] == timer_round)
|
|
{
|
|
timer_unset(timer);
|
|
int_handler(timer);
|
|
}
|
|
}
|
|
__exit_isr();
|
|
}
|