contiki/src/isr.c

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/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of libmc1322x: see http://mc1322x.devl.org
* for details.
*
*
*/
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#include <mc1322x.h>
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static void (*tmr_isr_funcs[4])(void) = {
tmr0_isr,
tmr1_isr,
tmr2_isr,
tmr3_isr
};
void irq_register_timer_handler(int timer, void (*isr)(void))
{
tmr_isr_funcs[timer] = isr;
}
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__attribute__ ((section (".irq")))
__attribute__ ((interrupt("IRQ")))
void irq(void)
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{
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uint32_t pending;
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while ((pending = *NIPEND)) {
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if(bit_is_set(pending, INT_NUM_TMR)) {
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/* dispatch to individual timer isrs if they exist */
/* timer isrs are responsible for determining if they
* caused an interrupt */
/* and clearing their own interrupt flags */
if (tmr_isr_funcs[0] != 0) { (tmr_isr_funcs[0])(); }
if (tmr_isr_funcs[1] != 0) { (tmr_isr_funcs[1])(); }
if (tmr_isr_funcs[2] != 0) { (tmr_isr_funcs[2])(); }
if (tmr_isr_funcs[3] != 0) { (tmr_isr_funcs[3])(); }
}
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if(bit_is_set(pending, INT_NUM_MACA)) {
if(maca_isr != 0) { maca_isr(); }
}
if(bit_is_set(pending, INT_NUM_UART1)) {
if(uart1_isr != 0) { uart1_isr(); }
}
if(bit_is_set(pending, INT_NUM_CRM)) {
if(rtc_wu_evt() && (rtc_isr != 0)) { rtc_isr(); }
if(kbi_evnt(4) && (kbi4_isr != 0)) { kbi4_isr(); }
if(kbi_evnt(5) && (kbi5_isr != 0)) { kbi5_isr(); }
if(kbi_evnt(6) && (kbi6_isr != 0)) { kbi6_isr(); }
if(kbi_evnt(7) && (kbi7_isr != 0)) { kbi7_isr(); }
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if (CRM->STATUSbits.CAL_DONE && CRM->CAL_CNTLbits.CAL_IEN && cal_isr)
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{
CRM->STATUSbits.CAL_DONE = 0;
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cal_isr();
}
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}
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if(bit_is_set(pending, INT_NUM_ASM)) {
if(asm_isr != 0) { asm_isr(); }
}
*INTFRC = 0; /* stop forcing interrupts */
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}
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}