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authorDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
committerDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
commit67d25d837ac55f28a366c0a3b262e439a6e75fc3 (patch)
treedf7715c7724c5935ab87c807f3b8b4ef529315e3 /amforth-6.5/avr8/devices/atmega8535/words/sleep.asm
parente0d6784e89dba33226c0edb815bb974486fa7c48 (diff)
Add AmForth
Diffstat (limited to 'amforth-6.5/avr8/devices/atmega8535/words/sleep.asm')
-rw-r--r--amforth-6.5/avr8/devices/atmega8535/words/sleep.asm24
1 files changed, 24 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/devices/atmega8535/words/sleep.asm b/amforth-6.5/avr8/devices/atmega8535/words/sleep.asm
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+++ b/amforth-6.5/avr8/devices/atmega8535/words/sleep.asm
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+; ( mode -- )
+; MCU
+; put the controller into the specified sleep mode
+VE_SLEEP:
+ .dw $ff05
+ .db "sleep", 0
+ .dw VE_HEAD
+ .set VE_HEAD = VE_SLEEP
+XT_SLEEP:
+ .dw PFA_SLEEP
+PFA_SLEEP:
+ andi tosl, 7 ; leave only legal mode bits
+ swap tosl ; move to correct location (bits 6-4, atmega32)
+ ori tosl, $80 ; set the SE bit (atmega32: bit 7, not bit 0)
+ out_ MCUCR, tosl ; set the sleep config (atmega32: MCUCR not SMCR)
+ sleep ; nighty-night
+;; the 4 lower bits of MCUCR should not be touched
+ in_ tosl, MCUCR
+ andi tosl, $0F
+ out_ MCUCR, tosl
+ ;clr tosl ; need to clean up the SMCR reg before we leave
+ ;out SMCR, tosl ; 0 protects against accidental sleeps
+ loadtos ; pop argument from stack
+ jmp DO_NEXT