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Don't clobber r16, fixes debug mode

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This commit is contained in:
William Toohey
2015-12-28 03:05:03 +10:00
parent 9425b66779
commit 14ba2e12a3
1 changed files with 5 additions and 3 deletions
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8
Firmware/Keyboard/i2cmaster.S
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@@ -94,13 +94,15 @@ i2c_delay_T2: ; 4 cycles
;*************************************************************************
.func i2c_delay_40us
i2c_delay_40us: ; 4 cycles
ldi r16, 103 ; 1
push r16 ; 2
ldi r16, 102 ; 1
delay:
dec r16 ; 1
brne delay ; 2
; 1
ret ; 5 "
.endfunc ; total 320 cyles = 40 microsec with 8 Mhz crystal
pop r16 ; 2
ret ; 5
.endfunc ; total 321 cyles almost 40 microsec with 8 Mhz crystal
;*************************************************************************