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/*
* slow_status_flash.s
*
* Copyright © 2018 Thomas White <taw@bitwiz.org.uk>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
.include "swi_numbers.h"
.global flash_status_led
flash_status_led:
forever:
SWI OS_GetCPUID
MOV R7, R0
MOV R6, R7
MOV R0, #0
1:
MOV R1, #1<<29
SWI OS_SetGPIO
BL longpause
MOV R1, #1<<29
SWI OS_ClearGPIO
BL longpause
SUBS R6, R6, #1
BNE 1b
BL longpause
BL longpause
BL longpause
B forever
longpause:
MOV R2, #0x3f0000
2:
SUBS R2, R2, #1
BNE 2b
MOV PC, LR
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