126 lines
4.1 KiB
Plaintext
126 lines
4.1 KiB
Plaintext
RTC functions from Graph 35+E II OS 3.10
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<80054456 RTC_GetRawTime>
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Gets the time into a structure of the following form, where all objects are
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written in BCD notation.
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struct RTC_RawTime {
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uint16_t YEAR;
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uint8_t MONTH;
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uint8_t DAY;
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uint8_t HOURS;
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uint8_t MINUTES;
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uint8_t SECONDS;
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uint8_t zero;
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}; /* 8 bytes */
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r4: Pointer to [struct RTC_RawTime]
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80054456: d510 mov.l 0xa413fec2 RTC.RSECCNT, r5
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80054458: e1f8 mov #-8, r1
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8005445a: 8556 mov.w @(12,r5), r0
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8005445c: 620d extu.w r0, r2
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8005445e: 421c shad r1, r2
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80054460: 2420 mov.b r2, @r4
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80054462: 8041 mov.b r0, @(1,r4)
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80054464: 845a mov.b @(10,r5), r0
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80054466: 8042 mov.b r0, @(2,r4)
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80054468: 8458 mov.b @(8,r5), r0
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8005446a: 8043 mov.b r0, @(3,r4)
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8005446c: 8454 mov.b @(4,r5), r0
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8005446e: 8044 mov.b r0, @(4,r4)
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80054470: 8452 mov.b @(2,r5), r0
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80054472: 8045 mov.b r0, @(5,r4)
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80054474: 6050 mov.b @r5, r0
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80054476: 8046 mov.b r0, @(6,r4)
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80054478: e000 mov #0, r0
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8005447a: 000b rts
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8005447c: 8047 mov.b r0, @(7,r4)
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...
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<8005788c RTC_IsInitialized>
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Checks whether the RTC is initialized by comparing the current date with the
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(probably default) date of 2019-01-01. (Note: this OS 3.10 was compiled in
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2019 so this choice makes sense, even if the default has long been 2012.)
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r0: 1 if the RTC is initialized, 0 otherwise.
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# Get current time in BCD format
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8005788c: 4f22 sts.l pr, @-r15
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8005788e: 7ff8 add #-8, r15
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80057890: d271 mov.l 0x80054456 RTC_GetRawTime, r2
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80057892: 420b jsr @r2
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80057894: 64f3 mov r15, r4
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# Return 1 if the current date is not 2019-01-01
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80057896: 60f0 mov.b @r15, r0
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80057898: 8820 cmp/eq #32, r0
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8005789a: 8b09 bf <800578b0>
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8005789c: 84f1 mov.b @(1,r15), r0
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8005789e: 8819 cmp/eq #25, r0
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800578a0: 8b06 bf <800578b0>
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800578a2: 84f2 mov.b @(2,r15), r0
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800578a4: 8801 cmp/eq #1, r0
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800578a6: 8b03 bf <800578b0>
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800578a8: 84f3 mov.b @(3,r15), r0
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800578aa: 8801 cmp/eq #1, r0
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# Return 0 otherwise
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800578ac: 8d01 bt.s <800578b2>
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800578ae: e000 mov #0, r0
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800578b0: e001 mov #1, r0
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800578b2: 7f08 add #8, r15
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800578b4: 4f26 lds.l @r15+, pr
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800578b6: 000b rts
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800578b8: 0009 nop
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<800578ba RTC_TimeCategorySinceReset>
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Returns a broad categorization of the time spent since last RTC reset. The
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category is computed by comparing the current time to the default time of
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RTC_IsInitialized (2019-01-01). The categories are defined by the following
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ranges of time spent since last RTC reset:
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3: More than 12 hours
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2: Between 15 minutes and 12 hours
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1: Between 10 minutes and 15 minutes
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0: Less than 10 minutes
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# Get tick-based time, divide by 128 to get second-based time and round to 0
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# (adding 127 to a negative tick-time rounds near 0, but is useless here).
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800578ba: 2fe6 mov.l r14, @-r15
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800578bc: 4f22 sts.l pr, @-r15
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800578be: d267 mov.l %03b RTC_GetTicks, r2
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800578c0: 420b jsr @r2
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800578c2: 0009 nop
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800578c4: 4011 cmp/pz r0
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800578c6: 8d01 bt.s <800578cc>
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800578c8: 6e03 mov r0, r14
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800578ca: 7e7f add #127, r14
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800578cc: e2f9 mov #-7, r2
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# Return:
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# -> 3 if current date is after 2019-01-01 12:00
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# -> 2 if it's before that but still after 00:15
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# -> 1 if it's before that but still after 00:10
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# -> 0 if it's before 00:10
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800578ce: bfdd bsr <8005788c RTC_IsInitialized>
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800578d0: 4e2c shad r2, r14
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800578d2: 8801 cmp/eq #1, r0
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800578d4: 890a bt <800578ec>
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800578d6: d262 mov.l 0x0000a8c0, r2
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800578d8: 3e23 cmp/ge r2, r14
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800578da: 8907 bt <800578ec>
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800578dc: 9293 mov.w 0x00000384, r2
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800578de: 3e23 cmp/ge r2, r14
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800578e0: 8d05 bt.s <800578ee>
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800578e2: e002 mov #2, r0
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800578e4: 9290 mov.w 0x00000258, r2
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800578e6: 3e23 cmp/ge r2, r14
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800578e8: a001 bra <800578ee>
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800578ea: 0029 movt r0
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800578ec: e003 mov #3, r0
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800578ee: 4f26 lds.l @r15+, pr
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800578f0: 000b rts
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800578f2: 6ef6 mov.l @r15+, r14
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