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[/] [openmsp430/] [trunk/] [core/] [sim/] [rtl_sim/] [src/] [dma_lpm4_asic.s43] - Rev 224
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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 */
/* */
/*===========================================================================*/
/* CPU LOW POWER MODES & DMA TRANSFER */
/*---------------------------------------------------------------------------*/
/* Test DMA transfer with the CPU Low Power modes: */
/* */
/* - LPM0 <=> CPUOFF */
/* - LPM1 <=> CPUOFF + SCG0 */
/* - LPM2 <=> CPUOFF + SCG1 */
/* - LPM3 <=> CPUOFF + SCG0 + SCG1 */
/* - LPM4 <=> CPUOFF + SCG0 + SCG1 + OSCOFF */
/* */
/* */
/* Reminder about config registers: */
/* */
/* - CPUOFF <=> turns off CPU. */
/* - SCG0 <=> turns off DCO. */
/* - SCG1 <=> turns off SMCLK. */
/* - OSCOFF <=> turns off LFXT_CLK. */
/* */
/* - DMA_CPUOFF <=> allow DMA to turn on MCLK */
/* - DMA_SCG0 <=> allow DMA to turn on DCO */
/* - DMA_SCG1 <=> allow DMA to turn on SMCLK */
/* - DMA_OSCOFF <=> allow DMA to turn on LFXT_CLK */
/* */
/* Author(s): */
/* - Olivier Girard, olgirard@gmail.com */
/* */
/*---------------------------------------------------------------------------*/
/* $Rev: 19 $ */
/* $LastChangedBy: olivier.girard $ */
/* $LastChangedDate: 2009-08-04 23:47:15 +0200 (Tue, 04 Aug 2009) $ */
/*===========================================================================*/
.include "pmem_defs.asm"
.global main
.macro LPM0
bis #0x0010, r2
.endm
.macro LPM1
bis #0x0050, r2
.endm
.macro LPM2
bis #0x0090, r2
.endm
.macro LPM3
bis #0x00D0, r2
.endm
.macro LPM4
bis #0x00F0, r2
.endm
.macro LPM0_exit
bic #0x0010, @r1
.endm
.macro LPM1_exit
bic #0x0050, @r1
.endm
.macro LPM2_exit
bic #0x0090, @r1
.endm
.macro LPM3_exit
bic #0x00D0, @r1
.endm
.macro LPM4_exit
bic #0x00F0, @r1
.endm
.macro DMA_NO_LPM
bic.b #0x0F, &BCSCTL1
.endm
.macro DMA_CPUOFF
bis.b #0x01, &BCSCTL1
.endm
.macro DMA_OSCOFF
bis.b #0x02, &BCSCTL1
.endm
.macro DMA_SCG0
bis.b #0x04, &BCSCTL1
.endm
.macro DMA_SCG1
bis.b #0x08, &BCSCTL1
.endm
/* ---------------------- SOME VARIABLES IN ROM --------------- */
diverse_data:
.word 0x0000 ; set to 1 in order to end test
.word 0x0001 ; increment value
/* ---------------------- MAIN --------------- */
WAIT_FUNC:
dec r14
jnz WAIT_FUNC
ret
main:
; Initialize stack and enable global interrupts
mov #DMEM_250, r1
eint
; Wait for a while to give enough time to ACLK
mov #0x0050, r14
call #WAIT_FUNC
mov #0x1000, r15
/* -------------------------- ACTIVE ----------------------------- */
mov #0x1001, r15
mov.b #0x00, &BCSCTL2 ; # MCLK = DCO_CLK
; # SMCLK = DCO_CLK
mov #0x0080, r14
call #WAIT_FUNC
mov #0x2000, r15
/* -------------------------- LPM4 ----------------------------- */
;; Go to LPM4 mode for all possible DMA configuration
mov #0x3000, r15
mov #0x0000, r12
mov #0x0010, r10 ; # Number of combination to try
mov.b #0x00, &BCSCTL1 ; # Initialize DMA low-power mode
lpm0_loop:
cmp.b r10, r12
jge lpm0_loop_done
LPM4 ; # CPU_MCLK off + SMCLK off + DCO off + LFXT off
mov #0x0090, r14
call #WAIT_FUNC
inc r15
inc r12
mov.b r12, &BCSCTL1 ; # Set DMA low-power mode for next round
jmp lpm0_loop
lpm0_loop_done:
mov.b #0x00, &BCSCTL1
/* ---------------------- END OF TEST --------------- */
end_of_test:
nop
br #0xffff
/* ---------------------- INTERRUPT ROUTINES --------------- */
PORT2_VECTOR:
push r13
push r14
mov #0x0060, r14
call #WAIT_FUNC
mov #0xbbbb, r13
pop r14
pop r13
bic #0xf0, 0(r1) ; exit all lowpower mode
reti
/* ---------------------- INTERRUPT VECTORS --------------- */
.section .vectors, "a"
.word end_of_test ; Interrupt 0 (lowest priority) <unused>
.word end_of_test ; Interrupt 1 <unused>
.word end_of_test ; 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
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