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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [h8300/] [aki3068net/] [v2_0/] [src/] [delay_us.S] - Rev 454
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;;delay_us
#include <pkgconf/hal.h>
#include <cyg/hal/arch.inc>
#include <cyg/hal/basetype.h>
#include <cyg/hal/mod_regs_tmr.h>
#define DELAY_COUNT (CYGHWR_HAL_H8300_PROCESSOR_SPEED/1000000)*16/8
// .file "delay_us.S"
.h8300h
.text
.global CYG_LABEL_DEFN(hal_delay_us)
CYG_LABEL_DEFN(hal_delay_us):
mov.b #0,r1l
mov.b r1l,@CYGARC_8TCNT2:8
mov.b r1l,@CYGARC_8TCSR2:8
mov.b #DELAY_COUNT+1,r1l
mov.b r1l,@CYGARC_TCORA2:8
mov.b #0x09,r1l
mov.b r1l,@CYGARC_8TCR2:8
mov.b #0,r2h
sub.w e1,e1
1:
mov.l er0,er0
ble 3f
2:
btst #6,@CYGARC_8TCSR2:8
beq 2b
bclr #6,@CYGARC_8TCSR2:8
dec.l #1,er0
bra 1b
3:
mov.b #0,r0l
mov.b r0l,@CYGARC_8TCR2
rts
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