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olivier.gi |
/*===========================================================================*/
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/* Copyright (C) 2001 Authors */
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/* */
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/* This source file may be used and distributed without restriction provided */
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/* that this copyright statement is not removed from the file and that any */
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/* derivative work contains the original copyright notice and the associated */
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/* disclaimer. */
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/* */
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/* This source file is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU Lesser General Public License as published */
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/* by the Free Software Foundation; either version 2.1 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This source is distributed in the hope that it will be useful, but WITHOUT*/
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* License for more details. */
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/* */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* along with this source; if not, write to the Free Software Foundation, */
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/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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/* */
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/*===========================================================================*/
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/* WATCHDOG TIMER */
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/*---------------------------------------------------------------------------*/
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/* Test the Watdog timer: */
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/* - Clock source selection. */
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/*===========================================================================*/
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.global main
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.set BCSCTL1, 0x0057
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.set BCSCTL2, 0x0058
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.set IE1, 0x0000
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.set IFG1, 0x0002
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.set WDTCTL, 0x0120
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WAIT_FUNC:
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dec r14
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jnz WAIT_FUNC
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ret
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main:
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/* ------- WATCHDOG TEST INTERVAL MODE /64 - SMCLK /2 ------ */
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mov #0x0250, r1 ;# Initialize stack & Enable interrupts
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eint
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bis.b #0x01, &IE1
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mov.b #0x02, &BCSCTL2 ;# SMCLK = MCLK/2
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mov #0x5a1b, &WDTCTL ;# Enable interval mode /64 & clear counter
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mov #0x0001, r15
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mov #0x0170, r14
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call #WAIT_FUNC
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mov #0x1000, r15
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/* ------- WATCHDOG TEST INTERVAL MODE /64 - ACLK ------ */
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mov #0x0250, r1 ;# Initialize stack & Enable interrupts
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eint
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bis.b #0x01, &IE1
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mov.b #0x00, &BCSCTL1 ;# ACLK = LFXTCLK/1
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mov #0x5a1f, &WDTCTL ;# Enable interval mode /64 & clear counter
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mov #0x1001, r15
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mov #0x1000, r14
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call #WAIT_FUNC
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mov #0x2000, r15
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/* ---------------------- END OF TEST --------------- */
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end_of_test:
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nop
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br #0xffff
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/* ---------------------- INTERRUPT ROUTINES --------------- */
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WDOG_VECTOR:
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xor #0x0001, r5 ; # Toggle r5[0] for testbench stimulus check
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reti
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/* ---------------------- INTERRUPT VECTORS --------------- */
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.section .vectors, "a"
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.word end_of_test ; Interrupt 0 (lowest priority)
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.word end_of_test ; Interrupt 1
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.word end_of_test ; Interrupt 2
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.word end_of_test ; Interrupt 3
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.word end_of_test ; Interrupt 4
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.word end_of_test ; Interrupt 5
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.word end_of_test ; Interrupt 6
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.word end_of_test ; Interrupt 7
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.word end_of_test ; Interrupt 8
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.word end_of_test ; Interrupt 9
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.word WDOG_VECTOR ; Interrupt 10 Watchdog timer
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.word end_of_test ; Interrupt 11
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.word end_of_test ; Interrupt 12
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.word end_of_test ; Interrupt 13
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.word end_of_test ; Interrupt 14 NMI
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.word main ; Interrupt 15 (highest priority) RESET
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