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SuperCIC key: improve mid-operation pair mode detect; documentation, cleanup.

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This commit is contained in:
ikari
2010-05-08 10:07:15 +02:00
parent 18d7cbbd6f
commit bc5cf05880
2 changed files with 21 additions and 20 deletions
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17
cic/supercic/supercic-key.asm
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@@ -28,7 +28,7 @@ processor p12f629
; +5V (27,58) [16] |1 8| GND (5,36) [8]
; CIC clk (56) [6] |2 7| CIC data i/o 0 (55) [2]
; status out |3 6| CIC data i/o 1 (24) [1]
; nc |4 5| CIC slave reset (25) [7]
; /PAIR |4 5| CIC slave reset (25) [7]
; `-------'
;
;
@@ -38,7 +38,7 @@ processor p12f629
; -------------------------+----------------------------
; OK or no lock CIC | high
; error | low
; SuperCIC pair mode | high-low alternating @1kHz
; SuperCIC pair mode | 148.75kHz / 50% duty cycle
;
; In case lockout fails, the region is switched automatically and
; will be used after the next reset.
@@ -53,7 +53,8 @@ processor p12f629
; 0x4d buffer for eeprom access
; 0x4e loop variable for longwait
; 0x4f loop variable for wait
;
; 0x5e SuperCIC pair mode detect (phase 1)
; 0x5f SuperCIC pair mode detect (phase 2)
; ---------------------------------------------------------------------
@@ -444,13 +445,13 @@ mangle_key_withskip
bcf GPIO, 0
movf GPIO, w
movwf 0x5e
btfsc GPIO, 3
btfss GPIO, 3
bsf GPIO, 0
movf GPIO, w
movwf 0x5f
bcf GPIO, 0
nop
nop
btfsc GPIO, 3
clrf 0x5e
nop
btfss 0x20, 4 ; skip if half-byte carry
goto mangle_return ; +2 cycles in return
@@ -622,7 +623,7 @@ mangle_lock_withskip
goto scic_pair_skip1
btfsc 0x5f, 1
goto scic_pair_skip2
btfss GPIO, 3
btfsc GPIO, 3
goto scic_pair_skip3
goto supercic_pairmode
scic_pair_skip1
@@ -696,7 +697,7 @@ die_intloop
banksel GPIO
bcf GPIO, 4
; --------forever: blink status pin--------
; --------get caught up--------
die_trap
goto die_trap
; -----------------------------------------------------------------------