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/*===========================================================================*/
/* Copyright (C) 2001 Authors                                                */
/*                                                                           */
/* This source file may be used and distributed without restriction provided */
/* that this copyright statement is not removed from the file and that any   */
/* derivative work contains the original copyright notice and the associated */
/* disclaimer.                                                               */
/*                                                                           */
/* This source file is free software; you can redistribute it and/or modify  */
/* it under the terms of the GNU Lesser General Public License as published  */
/* by the Free Software Foundation; either version 2.1 of the License, or    */
/* (at your option) any later version.                                       */
/*                                                                           */
/* This source 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 Lesser General Public       */
/* License for more details.                                                 */
/*                                                                           */
/* You should have received a copy of the GNU Lesser General Public License  */
/* along with this source; if not, write to the Free Software Foundation,    */
/* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA        */
/*                                                                           */
/*===========================================================================*/
/*                            DIGITAL I/O                                    */
/*---------------------------------------------------------------------------*/
/* Test the Digital I/O interface:                                           */
/*                                   - Interrupts.                           */
/*                                                                           */
/* Author(s):                                                                */
/*             - Olivier Girard,    olgirard@gmail.com                       */
/*                                                                           */
/*---------------------------------------------------------------------------*/
/* $Rev: 141 $                                                                */
/* $LastChangedBy: olivier.girard $                                          */
/* $LastChangedDate: 2012-05-05 23:22:06 +0200 (Sat, 05 May 2012) $          */
/*===========================================================================*/

.include "pmem_defs.asm"

.global main

main:
        ; Disable interrupts
        dint
        mov.b #0x00, &P1IE
        mov.b #0x00, &P2IE


        /* -------------- PORT 1: TEST INTERRUPT FLAGS  --------------- */

        
        mov.b   #0x00, &P1IES       ;# TEST IF RISING EDGE ENABLED

        mov     #DMEM_200, r15        ;# Make sure rising edge is detected test 1
p1ifg_re_loop1:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        mov.b   #0x00, &P1IFG
        inc      r15
        cmp     #DMEM_208, r15
        jne     p1ifg_re_loop1

        mov     #DMEM_210, r15        ;# Make sure falling edge is ignored
p1ifg_fe_loop1:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        mov.b   #0x00, &P1IFG
        inc      r15
        cmp     #DMEM_218, r15
        jne     p1ifg_fe_loop1

        mov     #DMEM_220, r15        ;# Make sure rising edge is detected test 2
p1ifg_re_loop2:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        inc      r15
        cmp     #DMEM_228, r15
        jne     p1ifg_re_loop2
        mov.b   #0x00, &P1IFG



        mov.b   #0xff, &P1IES       ;# TEST IF FALLING EDGE ENABLED

        mov     #DMEM_230, r15        ;# Make sure falling edge is detected test 1
p1ifg_fe_loop2:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        mov.b   #0x00, &P1IFG
        inc      r15
        cmp     #DMEM_238, r15
        jne     p1ifg_fe_loop2

        mov     #DMEM_240, r15        ;# Make sure rising edge is ignored
p1ifg_re_loop3:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        mov.b   #0x00, &P1IFG
        inc      r15
        cmp     #DMEM_248, r15
        jne     p1ifg_re_loop3

        mov     #DMEM_250, r15        ;# Make sure falling edge is detected test 2
p1ifg_fe_loop3:
        nop
        nop
        mov.b &P1IFG,  0(r15)
        inc      r15
        cmp     #DMEM_258, r15
        jne     p1ifg_fe_loop3
        mov.b   #0x00, &P1IFG


        /* -------------- PORT 2: TEST INTERRUPT FLAGS  --------------- */

        
        mov.b   #0x00, &P2IES       ;# TEST IF RISING EDGE ENABLED

        mov     #DMEM_200, r15        ;# Make sure rising edge is detected test 1
p2ifg_re_loop1:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        mov.b   #0x00, &P2IFG
        inc      r15
        cmp     #DMEM_208, r15
        jne     p2ifg_re_loop1

        mov     #DMEM_210, r15        ;# Make sure falling edge is ignored
p2ifg_fe_loop1:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        mov.b   #0x00, &P2IFG
        inc      r15
        cmp     #DMEM_218, r15
        jne     p2ifg_fe_loop1

        mov     #DMEM_220, r15        ;# Make sure rising edge is detected test 2
p2ifg_re_loop2:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        inc      r15
        cmp     #DMEM_228, r15
        jne     p2ifg_re_loop2
        mov.b   #0x00, &P2IFG



        mov.b   #0xff, &P2IES       ;# TEST IF FALLING EDGE ENABLED

        mov     #DMEM_230, r15        ;# Make sure falling edge is detected test 1
p2ifg_fe_loop2:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        mov.b   #0x00, &P2IFG
        inc      r15
        cmp     #DMEM_238, r15
        jne     p2ifg_fe_loop2

        mov     #DMEM_240, r15        ;# Make sure rising edge is ignored
p2ifg_re_loop3:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        mov.b   #0x00, &P2IFG
        inc      r15
        cmp     #DMEM_248, r15
        jne     p2ifg_re_loop3

        mov     #DMEM_250, r15        ;# Make sure falling edge is detected test 2
p2ifg_fe_loop3:
        nop
        nop
        mov.b &P2IFG,  0(r15)
        inc      r15
        cmp     #DMEM_258, r15
        jne     p2ifg_fe_loop3
        mov.b   #0x00, &P2IFG


        /* --------------            CLEAR MEMORY        --------------- */

        mov     #DMEM_200, r5
mem_clear_loop:
        mov     #0x00,  0(r5)
        incd      r5
        cmp     #DMEM_260, r5
        jne     mem_clear_loop


        /* -------------- PORT 1: TEST INTERRUPT VECTOR  --------------- */

        mov     #DMEM_250, r1     ; Initialize stack
        eint                    ; Enable interrupts

        mov.b   #0x0001, r6
        mov.b        r6, &P1IE
        mov     #DMEM_200, r15;
p1_irq_loop:
        mov.b        r6, &P1IFG ; Generate soft interrupt
        nop
        nop
        nop
        rla          r6
        mov.b        r6, &P1IE
        inc         r15
        cmp     #DMEM_208, r15
        jne     p1_irq_loop


        /* -------------- PORT 2: TEST INTERRUPT VECTOR  --------------- */

        mov     #DMEM_250, r1     ; Initialize stack
        eint                    ; Enable interrupts

        mov.b   #0x0001, r6
        mov.b        r6, &P2IE
        mov     #DMEM_210, r15;
p2_irq_loop:
        mov.b        r6, &P2IFG ; Generate soft interrupt
        nop
        nop
        nop
        rla          r6
        mov.b        r6, &P2IE
        inc         r15
        cmp     #DMEM_218, r15
        jne     p2_irq_loop


        /* ----------------------         END OF TEST        --------------- */
end_of_test:
        nop
        br #0xffff


        /* ----------------------      INTERRUPT ROUTINES    --------------- */

PORT1_VECTOR:
        mov.b &P1IFG,  0(r15)
        mov.b  #0x00, &P1IFG
        reti    

PORT2_VECTOR:
        mov.b &P2IFG,  0(r15)
        mov.b  #0x00, &P2IFG
        reti    



        /* ----------------------         INTERRUPT VECTORS  --------------- */

.section .vectors, "a"
.word end_of_test  ; Interrupt  0 (lowest priority)    <unused>
.word end_of_test  ; Interrupt  1                      <unused>
.word PORT1_VECTOR ; Interrupt  2                      <unused>
.word PORT2_VECTOR ; Interrupt  3                      <unused>
.word end_of_test  ; Interrupt  4                      <unused>
.word end_of_test  ; Interrupt  5                      <unused>
.word end_of_test  ; Interrupt  6                      <unused>
.word end_of_test  ; Interrupt  7                      <unused>
.word end_of_test  ; Interrupt  8                      <unused>
.word end_of_test  ; Interrupt  9                      <unused>
.word end_of_test  ; Interrupt 10                      Watchdog timer
.word end_of_test  ; Interrupt 11                      <unused>
.word end_of_test  ; Interrupt 12                      <unused>
.word end_of_test  ; Interrupt 13                      <unused>
.word end_of_test  ; Interrupt 14                      NMI
.word main         ; Interrupt 15 (highest priority)   RESET