Mercurial > public > mk2
annotate code_part1/OSTC_code_asm_part1/adc_rtc.asm @ 695:5bf4f526f552
... minor cleanups ...
author | JeanDo |
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date | Wed, 13 Feb 2013 10:36:28 +0100 |
parents | 82f71a73f450 |
children | e6ff73e88e45 |
rev | line source |
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0 | 1 ; OSTC - diving computer code |
2 ; Copyright (C) 2008 HeinrichsWeikamp GbR | |
3 | |
4 ; This program is free software: you can redistribute it and/or modify | |
5 ; it under the terms of the GNU General Public License as published by | |
6 ; the Free Software Foundation, either version 3 of the License, or | |
7 ; (at your option) any later version. | |
8 | |
9 ; This program is distributed in the hope that it will be useful, | |
10 ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 ; GNU General Public License for more details. | |
13 | |
14 ; You should have received a copy of the GNU General Public License | |
15 ; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | |
17 | |
18 ; routines for AD converter, Realtime clock initialisation | |
19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com | |
20 ; written: 10/30/05 | |
21 ; last updated: 05/15/08 | |
22 ; known bugs: | |
23 ; ToDo: | |
24 | |
25 get_battery_voltage: ; starts ADC and waits until fnished | |
81
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26 ; In MPLAB Sim mode (hardware emulation), use a DMCI slider to |
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27 ; directly set a 16 bit value in the range 0..1023 |
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28 ; In normal mode, jut wait for the value to be ready: |
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29 |
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30 ifndef TESTING |
0 | 31 bsf ADCON0,0 ; power on ADC |
32 nop | |
33 bsf ADCON0,1 ; start ADC | |
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34 |
0 | 35 get_battery_voltage2: |
36 btfsc ADCON0,1 ; Wait... | |
37 bra get_battery_voltage2 | |
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38 endif |
0 | 39 |
40 ; 3.3V/1024=3,2227mV Input/Bit=9,6680mV Battery/Bit. | |
41 ; Example: 434*9,6680mV=4195,9mV Battery. | |
42 | |
43 movff ADRESH,xA+1 | |
44 movff ADRESL,xA+0 | |
45 movlw LOW d'966' | |
46 movwf xB+0 | |
47 movlw HIGH d'966' | |
48 movwf xB+1 | |
49 call mult16x16 ; AD_Result*966 | |
50 movlw d'100' | |
51 movwf xB+0 | |
52 clrf xB+1 | |
53 call div32x16 ;xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder | |
54 movff xC+0,batt_voltage+0 ; store value | |
55 movff xC+1,batt_voltage+1 | |
56 bcf ADCON0,0 ; power off ADC | |
57 | |
58 ; Check if we should enter deep-sleep mode | |
59 | |
60 movff batt_voltage+0,sub_b+0 | |
61 movff batt_voltage+1,sub_b+1 | |
62 movlw LOW d'2600' ; must be greater then 2600mV... | |
63 movwf sub_a+0 | |
64 movlw HIGH d'2600' | |
65 movwf sub_a+1 | |
66 call sub16 ; sub_c = sub_a - sub_b | |
67 bcf enter_error_sleep ; Clear flag | |
68 btfsc neg_flag ; neg_flag=1 if eeprom40:41 < 2000 | |
69 bra get_battery_voltage3 ; Battery in OK range | |
70 | |
71 movlw d'2' | |
72 movwf fatal_error_code ; Battery very low! | |
73 bsf enter_error_sleep ; enter error routine | |
74 | |
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75 get_battery_voltage3: |
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76 SAFE_2BYTE_COPY amb_pressure, sub_b |
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77 |
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78 movlw LOW d'15001' ; must be lower then 15001mbar |
0 | 79 movwf sub_a+0 |
80 movlw HIGH d'15001' | |
81 movwf sub_a+1 | |
82 call sub16 ; sub_c = sub_a - sub_b | |
83 bcf enter_error_sleep ; Clear flag | |
84 btfss neg_flag ; | |
85 bra get_battery_voltage4 ; Pressure in OK range | |
86 | |
87 movlw d'3' | |
88 movwf fatal_error_code ; too deep | |
89 bsf enter_error_sleep ; enter error routine | |
90 ; Continue with rest of routine | |
91 | |
92 get_battery_voltage4: | |
93 ; check if the battery control memory needs to be initialised! | |
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94 bcf initialize_battery1 ; clear check-flag |
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95 |
0 | 96 read_int_eeprom d'40' ; get lowest battery voltage seen in mV |
97 movff EEDATA,sub_b+0 | |
98 read_int_eeprom d'41' | |
99 movff EEDATA,sub_b+1 | |
100 | |
101 movlw LOW d'2000' ; must be greater then 2000mV... | |
102 movwf sub_a+0 | |
103 movlw HIGH d'2000' | |
104 movwf sub_a+1 | |
105 call sub16 ; sub_c = sub_a - sub_b | |
106 btfss neg_flag ; neg_flag=1 if eeprom40:41 < 2000 | |
107 bsf initialize_battery1 ; battery need to be initialised | |
108 | |
109 movlw LOW d'4500' ; must be lower then 4500mV... | |
110 movwf sub_a+0 | |
111 movlw HIGH d'4500' | |
112 movwf sub_a+1 | |
113 call sub16 ; sub_c = sub_a - sub_b | |
114 btfss neg_flag ; neg_flag=1 if eeprom40:41 < 4500 | |
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115 bsf initialize_battery1 ; battery need to be initialised |
0 | 116 |
117 btfss initialize_battery1 ; battery need to be initialised? | |
118 bra get_battery_no_init ; No, we have already valid values, just check for new extremas | |
119 | |
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120 get_battery_voltage_reset: |
0 | 121 ; Init EEPROM for battery control |
122 ; Reset lowest battery seen | |
123 movlw LOW d'4200' ; reset to 4.2V | |
124 movwf EEDATA | |
125 write_int_eeprom d'40' | |
126 movlw HIGH d'4200' ; reset to 4.2V | |
127 movwf EEDATA | |
128 write_int_eeprom d'41' | |
129 movff month,EEDATA | |
130 write_int_eeprom d'42' | |
131 movff day,EEDATA | |
132 write_int_eeprom d'43' | |
133 movff year,EEDATA | |
134 write_int_eeprom d'44' | |
341
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135 SAFE_2BYTE_COPY temperature,lo |
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136 movff lo,EEDATA |
0 | 137 write_int_eeprom d'45' |
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138 movff hi,EEDATA |
0 | 139 write_int_eeprom d'46' |
140 ; Reset charge statistics | |
53 | 141 clrf EEDATA |
142 write_int_eeprom d'47' ; last complete charge | |
143 write_int_eeprom d'48' ; last complete charge | |
144 write_int_eeprom d'49' ; last complete charge | |
145 write_int_eeprom d'50' ; total cycles | |
146 write_int_eeprom d'51' ; total cycles | |
147 write_int_eeprom d'52' ; total complete cycles | |
148 write_int_eeprom d'53' ; total complete cycles | |
0 | 149 ; Reset temperature extremas |
341
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150 SAFE_2BYTE_COPY temperature,lo |
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151 movff lo,EEDATA ; Reset mimimum extrema |
0 | 152 write_int_eeprom d'54' |
341
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153 movff hi,EEDATA |
0 | 154 write_int_eeprom d'55' |
155 movff month,EEDATA | |
156 write_int_eeprom d'56' | |
157 movff day,EEDATA | |
158 write_int_eeprom d'57' | |
159 movff year,EEDATA | |
160 write_int_eeprom d'58' | |
341
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161 movff lo,EEDATA ; Reset maximum extrema |
0 | 162 write_int_eeprom d'59' |
341
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163 movff hi,EEDATA |
0 | 164 write_int_eeprom d'60' |
165 movff month,EEDATA | |
166 write_int_eeprom d'61' | |
167 movff day,EEDATA | |
168 write_int_eeprom d'62' | |
169 movff year,EEDATA | |
170 write_int_eeprom d'63' | |
171 | |
172 get_battery_no_init: | |
173 read_int_eeprom d'40' ; get lowest battery voltage seen in mV | |
174 movff EEDATA,sub_b+0 | |
175 read_int_eeprom d'41' | |
176 movff EEDATA,sub_b+1 | |
177 movff batt_voltage+0,sub_a+0 | |
178 movff batt_voltage+1,sub_a+1 | |
179 call sub16 ; sub_c = sub_a - sub_b | |
180 btfss neg_flag ; new lowest battery voltage? | |
181 return ; no, quit routine | |
182 ; Yes, store new value together with the date and temperature values | |
183 movff batt_voltage+0,EEDATA | |
184 write_int_eeprom d'40' | |
185 movff batt_voltage+1,EEDATA | |
186 write_int_eeprom d'41' | |
187 movff month,EEDATA | |
188 write_int_eeprom d'42' | |
189 movff day,EEDATA | |
190 write_int_eeprom d'43' | |
191 movff year,EEDATA | |
192 write_int_eeprom d'44' | |
341
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193 SAFE_2BYTE_COPY temperature,lo |
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194 movff lo,EEDATA |
0 | 195 write_int_eeprom d'45' |
341
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196 movff hi,EEDATA |
0 | 197 write_int_eeprom d'46' |
198 return | |
199 | |
200 RTCinit: ; resets RTC | |
201 movlw 0x80 | |
202 movwf TMR1H | |
537 | 203 nop ; See errata DS80284E-page 2 |
0 | 204 clrf TMR1L |
205 ; Reset RTC if any part of the time/date is out of range | |
206 movlw d'60' ; Limit | |
207 cpfslt secs ; Check part | |
208 bra RTCinit2 ; Reset time... | |
209 movlw d'60' ; Limit | |
210 cpfslt mins ; Check part | |
211 bra RTCinit2 ; Reset time... | |
212 movlw d'24' ; Limit | |
213 cpfslt hours ; Check part | |
214 bra RTCinit2 ; Reset time... | |
215 movlw d'32' ; Limit | |
216 cpfslt day ; Check part | |
217 bra RTCinit2 ; Reset time... | |
218 movlw d'12' ; Limit | |
219 cpfslt month ; Check part | |
220 bra RTCinit2 ; Reset time... | |
221 movlw d'100' ; Limit | |
222 cpfslt year ; Check part | |
223 bra RTCinit2 ; Reset time... | |
614 | 224 ; Make sure day and month <> zero |
225 movlw .0 | |
226 cpfseq day ; =0? | |
227 incf day,F ; Yes, +1 | |
228 cpfseq month ; =0? | |
229 incf month,F ; Yes, +1 | |
230 bsf PIE1, TMR1IE ; Enable clock int | |
0 | 231 return |
232 | |
233 RTCinit2: | |
234 movlw .00 | |
235 movwf secs | |
236 movlw .00 | |
237 movwf mins | |
238 movlw .12 | |
239 movwf hours | |
692 | 240 movlw .11 |
0 | 241 movwf day |
692 | 242 movlw .2 |
0 | 243 movwf month |
692 | 244 movlw .13 |
0 | 245 movwf year |
614 | 246 bsf PIE1, TMR1IE ; Enable clock int |
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247 return |
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248 |
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249 reset_battery_stats: |
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250 bcf uart_reset_battery_stats ; Clear flag |
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251 bcf PIE1,RCIE ; no interrupt for UART |
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252 call rs232_get_byte ; Get Byte |
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253 bcf PIR1,RCIF ; clear flag |
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254 |
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255 btfsc rs232_recieve_overflow ; Byte received? |
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256 bra reset_battery_stats_exit ; No, exit |
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257 movlw 'f' |
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258 cpfseq RCREG ; Really reset statistics? |
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259 bra reset_battery_stats_exit ; No, exit |
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260 call rs232_get_byte ; Get byte |
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261 bcf PIR1,RCIF ; clear flag |
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262 |
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263 btfsc rs232_recieve_overflow ; Byte received? |
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264 bra reset_battery_stats_exit ; No, exit |
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265 movlw 'f' |
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266 cpfseq RCREG ; Really reset statistics? |
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267 bra reset_battery_stats_exit ; No, exit |
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268 ; Yes, Reset now. |
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269 rcall get_battery_voltage_reset ; Reset Statistics |
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270 movlw 'f' |
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271 movwf TXREG |
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272 call rs232_wait_tx ; Wait for uart |
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273 |
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274 reset_battery_stats_exit: |
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275 bsf PIE1,RCIE ; re-enable interrupt for UART |
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276 goto surfloop_loop ; return to surface loop |