Mercurial > public > mk2
annotate code_part1/OSTC_code_asm_part1/start.asm @ 501:986ec4d76510
FRENCH brightness text updated.
| author | JeanDo |
|---|---|
| date | Wed, 16 Nov 2011 13:30:11 +0100 |
| parents | 014b2b1e82dc |
| children | ed51a7a89d9a |
| rev | line source |
|---|---|
| 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 ; Start and init | |
| 19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com | |
| 20 ; written: 10/13/04 | |
| 21 ; last updated: 06/24/08 | |
| 22 ; known bugs: | |
| 23 ; ToDo: | |
| 24 | |
| 25 start: | |
| 26 movlb b'00000001' ; ram bank 1 selected | |
| 119 | 27 movff STKPTR,temp10 |
| 235 | 28 clrf temp10+1 |
| 0 | 29 call init |
| 30 btfsc divemode ; Reset from Divemode? | |
| 31 call PLED_resetdebugger ; Yes! Something went wrong, show reset informations | |
| 306 | 32 start3: |
| 0 | 33 clrf STKPTR ; Clear Stackpointer |
| 359 | 34 lfsr FSR0,year+1 ; Clear rambank 1-9, do not delete RTC registers |
| 0 | 35 clear_rambank: |
| 36 clrf POSTINC0 | |
| 37 movlw 0x0A | |
| 38 cpfseq FSR0H ; Bank 9 done? | |
| 39 bra clear_rambank ; clear... | |
| 40 | |
| 41 ; Defaults for RTC | |
| 42 call disable_rs232 ; disable UART module | |
| 43 call RTCinit ; reset RTC | |
| 44 | |
| 45 ; Air pressure compensation after reset | |
| 46 call get_calibration_data ; Get calibration data from pressure sensor | |
| 47 | |
| 48 bcf pressure_refresh | |
| 49 wait_start_pressure: | |
| 50 btfss pressure_refresh ; Air pressure compensation | |
| 51 bra wait_start_pressure | |
| 52 | |
| 53 clrf rel_pressure+0 | |
| 54 clrf rel_pressure+1 | |
| 55 clrf surface_interval+0 | |
| 56 clrf surface_interval+1 | |
| 57 | |
| 58 bsf sleepmode ; Routine only works in sleepmode... | |
| 59 call pressuretest_sleep_fast ; Gets pressure without averaging (faster!) | |
| 60 bcf sleepmode ; Normal mode again | |
|
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61 SAFE_2BYTE_COPY amb_pressure_avg, amb_pressure ; copy for compatibility |
| 233 | 62 |
| 380 | 63 SAFE_2BYTE_COPY amb_pressure_avg, last_surfpressure |
| 64 SAFE_2BYTE_COPY amb_pressure_avg, amb_pressure | |
|
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65 movff last_surfpressure+0,last_surfpressure_15min+0 |
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66 movff last_surfpressure+1,last_surfpressure_15min+1 |
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67 movff last_surfpressure+0,last_surfpressure_30min+0 |
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68 movff last_surfpressure+1,last_surfpressure_30min+1 ; Rests all airpressure registers |
| 0 | 69 |
| 233 | 70 ; Extra power-up reset (JeanDo) |
| 71 ifdef TESTING | |
| 72 call do_menu_reset_all2 | |
| 73 endif | |
| 74 | |
| 0 | 75 ; reset deco data |
| 236 | 76 ostc_debug '0' ; Sends debug-information to screen if debugmode active |
| 77 | |
| 0 | 78 movlw d'79' ; 79% N2 |
| 197 | 79 movff WREG,char_I_N2_ratio ; No He at the Surface |
| 236 | 80 clrf WREG ; Use as buffer |
| 81 movff WREG,char_I_He_ratio ; No He at the Surface | |
| 82 movff WREG,char_I_step_is_1min ; 2 second deco mode | |
| 83 GETCUSTOM8 d'11' ; Saturation multiplier % | |
| 84 movff WREG,char_I_saturation_multiplier | |
| 85 GETCUSTOM8 d'12' ; Desaturation multiplier % | |
| 86 movff WREG,char_I_desaturation_multiplier | |
|
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87 SAFE_2BYTE_COPY amb_pressure,int_I_pres_respiration ; copy for deco routine |
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88 movff int_I_pres_respiration+0,int_I_pres_surface+0 ; copy for desat routine |
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89 movff int_I_pres_respiration+1,int_I_pres_surface+1 |
| 0 | 90 |
| 116 | 91 call deco_clear_tissue ; |
| 92 call deco_calc_desaturation_time ; calculate desaturation time | |
| 93 call deco_clear_CNS_fraction ; clear CNS | |
| 0 | 94 call calc_deko_surfmode ; calculate desaturation every minute |
| 116 | 95 call deco_calc_wo_deco_step_1_min ; calculate deco in surface mode |
| 0 | 96 movlb b'00000001' ; select ram bank 1 |
| 412 | 97 clrf nofly_time+0 ; Reset NoFly |
| 98 clrf nofly_time+1 ; Reset NoFly | |
| 99 bcf nofly_active ; Clear flag | |
| 0 | 100 |
| 101 ; check firmware and reset Custom Functions after an update | |
|
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102 movlw d'1' |
| 0 | 103 movwf EEADR |
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104 movlw d'1' |
| 0 | 105 movwf EEADRH |
| 106 call read_eeprom ; read current version x | |
| 107 movff EEDATA,temp1 | |
| 108 incf EEADR,F ; set to 0x102 | |
| 109 call read_eeprom ; read current version y | |
| 110 movff EEDATA,temp2 | |
| 111 clrf EEADRH ; Reset EEADRH | |
| 112 | |
| 113 movlw softwareversion_x | |
| 114 cpfseq temp1 ; compare version x | |
| 115 bra check_firmware_new ; is not equal -> reset CF and store new version in EEPROM | |
| 116 | |
| 117 movlw softwareversion_y | |
| 118 cpfseq temp2 ; compare version y | |
| 119 bra check_firmware_new ; is not equal -> reset CF and store new version in EEPROM | |
| 120 bra restart ; x and y are equal -> do not reset cf | |
| 121 | |
| 122 check_firmware_new: | |
|
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123 movlw d'1' ; store current version in EEPROM |
| 0 | 124 movwf EEADR |
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125 movlw d'1' |
| 0 | 126 movwf EEADRH |
| 127 movlw softwareversion_x | |
| 128 movwf EEDATA | |
| 129 call write_eeprom ; write version x | |
| 130 incf EEADR,F ; set to 0x102 | |
| 131 movlw softwareversion_y | |
| 132 movwf EEDATA | |
| 133 call write_eeprom ; write version y | |
| 134 clrf EEADRH ; Reset EEADRH | |
| 392 | 135 |
| 500 | 136 ; After update resets |
| 137 ; Reset brightness to ECO | |
| 138 movlw LOW 0x104 | |
| 139 movwf EEADR | |
| 140 movlw HIGH 0x104 | |
| 141 movwf EEADRH ; OLED brightness (=0: Eco, =1: High) | |
| 142 movlw .0 | |
| 143 movwf EEDATA | |
| 144 call write_eeprom ; write byte | |
| 145 clrf EEADRH ; Reset EEADRH | |
| 0 | 146 |
| 147 restart: | |
| 390 | 148 movlw b'00000011' |
| 149 movwf T3CON ; Timer3 with 32768Hz clock running | |
| 150 clrf TMR3L | |
| 151 clrf TMR3H | |
| 21 | 152 bcf LED_red |
| 153 bcf LED_blue ; all LEDs off | |
| 43 | 154 GETCUSTOM8 d'48' ; time correction value |
| 155 movff WREG, time_correction_value ; store in Bank0 register | |
| 15 | 156 |
| 157 clrf flag1 ; clear all flags | |
| 158 clrf flag2 | |
| 159 clrf flag3 | |
| 160 clrf flag4 | |
| 161 clrf flag5 | |
| 162 clrf flag6 | |
| 163 clrf flag7 | |
| 164 clrf flag8 | |
| 165 clrf flag9 | |
| 166 clrf flag10 | |
| 167 clrf flag11 | |
| 168 clrf flag12 | |
| 169 clrf flag13 | |
| 170 clrf flag14 | |
| 171 clrf flag15 | |
| 153 | 172 |
|
169
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173 ; Should we set win_flip_screen ? |
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174 bsf flag1,0 ; Precondition to yes |
| 153 | 175 clrf EEADRH ; Reset EEADRH |
| 176 read_int_eeprom d'1' | |
| 177 movlw .7 | |
|
169
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178 cpfsgt EEDATA ; serial > 2048 (Mk2n hardware) ? |
| 153 | 179 bcf flag1,0 |
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180 incf EEDATA,W ; serial == 65535 (emulation) ? |
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181 btfsc STATUS,Z |
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182 bcf flag1,0 |
| 153 | 183 movff flag1,win_flags ; store in Bank0 register |
| 184 clrf flag1 ; Clear flag1 (again) | |
| 239 | 185 |
| 186 ; Select high altitude (Fly) mode? | |
| 187 movff last_surfpressure_30min+0,sub_b+0 | |
| 188 movff last_surfpressure_30min+1,sub_b+1 | |
| 189 movlw HIGH d'880' | |
| 190 movwf sub_a+1 | |
| 191 movlw LOW d'880' ; Hard-wired 880mBar | |
| 192 movwf sub_a+0 | |
| 193 call sub16 ; sub_c = sub_a - sub_b | |
| 194 btfss neg_flag ; Result negative (Ambient>880mBar)? | |
| 195 bsf high_altitude_mode ; No, Set Flag! | |
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196 |
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197 ; Should we disable sleep (hardware emulator) |
| 390 | 198 restart_loop: |
| 199 btfss 0xF81,0,A | |
| 200 bra restart_loop | |
| 201 btfss 0xF81,1,A | |
| 202 bra restart_loop | |
| 203 movlw 0x80 | |
| 204 cpfslt 0xFB3,A | |
| 167 | 205 bsf nsm ; NO-SLEEP-MODE : for hardware debugging |
| 153 | 206 |
| 142 | 207 call gassetup_sort_gaslist ; Sorts Gaslist according to change depth |
| 0 | 208 WIN_TOP .0 |
| 209 WIN_LEFT .0 | |
| 210 WIN_FONT FT_SMALL | |
| 211 WIN_INVERT .0 ; Init new Wordprocessor | |
|
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212 setf WREG |
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213 movff WREG,win_color1 ; Beware: win_color1 is bank0, and we are bank1 currently |
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214 movff WREG,win_color2 |
| 0 | 215 call I2CReset ; Just in Case any I2C device blocks the Bus |
| 216 movff last_surfpressure_30min+0,last_surfpressure+0 ; Use 30min old airpressure | |
| 217 movff last_surfpressure_30min+1,last_surfpressure+1 ; Use 30min old airpressure | |
| 218 | |
| 219 ; Check if new CF were added in the last firmware version | |
| 220 clrf EEADRH | |
| 221 read_int_eeprom d'92' ; Read number of CF used in this firmware | |
| 222 movlw max_custom_number ; Defined in definitions.asm | |
| 223 cpfseq EEDATA ; Compare with last version | |
| 224 bra restart_01 ; New CF, show warning and store new number | |
| 225 bra restart_1 ; No new CF, continue with boot | |
| 226 restart_01: | |
| 227 ; Save new number of current CF count | |
|
411
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BUGFIX: CNS was not cleared with a "Reset Deco"
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228 call PLED_boot ; PLED boot (Incl. Clear Screen!) |
| 0 | 229 rcall display_new_cf_installed; Show warning |
| 230 movlw max_custom_number ; Defined in definitions.asm | |
| 231 movwf EEDATA | |
| 232 write_int_eeprom d'92' ; Store number of CF used in this firmware | |
| 233 | |
| 234 restart_1: | |
| 235 | |
| 236 ; Set Debug mode? | |
| 237 read_int_eeprom d'39' | |
| 238 bsf debug_mode | |
| 239 movlw d'1' | |
| 240 cpfseq EEDATA | |
| 241 bcf debug_mode ; clear flag if <> 1 | |
| 242 | |
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362
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Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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243 ; Check if logbook has been converted already (Internal EEPROM 0x100=0xAA) |
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Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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244 movlw LOW 0x100 |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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245 movwf EEADR |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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246 movlw HIGH 0x100 |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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247 movwf EEADRH |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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248 call read_eeprom ; read byte |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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249 movlw 0xAA |
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64da813d4726
Logbook converter (Needs ~8Minutes and is called one time). Backup your dives before use!!
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250 cpfseq EEDATA ; is 0xAA already? |
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251 call logbook_convert_64k ; No, convert now (And write 0xAA to internal EEPROM 0x100) |
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252 |
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253 ; Set OLED brightness flag |
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254 movlw LOW 0x104 |
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255 movwf EEADR |
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256 movlw HIGH 0x104 |
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257 movwf EEADRH ; OLED brightness (=0: Eco, =1: High) |
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258 call read_eeprom ; read byte |
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259 bcf oled_brightness_high ; Eco mode |
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260 movlw .0 |
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261 cpfseq EEDATA ; High? |
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262 bsf oled_brightness_high ; Yes! |
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263 |
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264 clrf EEADRH ; Reset EEADRH |
| 0 | 265 goto surfloop ; Jump to Surfaceloop! |
| 266 | |
| 267 | |
| 268 display_new_cf_installed: | |
| 269 call PLED_new_cf_warning ; Display new CF warning screen | |
| 270 movlw d'20' ; timeout for warning screen | |
| 271 bra startup_screen3a ; Will RETURN after timeout or button press | |
| 197 | 272 |
| 273 ;============================================================================= | |
| 274 ; Setup all flags and parameters for divemode and simulator computations. | |
| 275 ; | |
| 276 restart_set_modes_and_flags: ; "Call"ed from divemode, as well! | |
| 0 | 277 bcf gauge_mode |
| 278 bcf FLAG_const_ppO2_mode | |
| 279 bcf FLAG_apnoe_mode | |
| 45 | 280 |
| 281 ; Pre-load modes for OC, GF 90/90 and no Aponoe or Gauge. | |
| 197 | 282 bcf no_deco_customviews ; Clear no-deco-mode-flag |
| 45 | 283 movlw d'0' |
| 469 | 284 movff WREG,char_I_deco_model ; ZH-L16 |
| 45 | 285 ; Load GF values into RAM |
| 286 movlw d'90' | |
| 197 | 287 movff WREG,char_I_GF_Low_percentage |
| 288 movff WREG,char_I_GF_High_percentage ; Set to 90/90... | |
| 0 | 289 clrf EEADRH |
| 197 | 290 read_int_eeprom d'34' ; Read deco data |
| 291 movlw d'1' ; Gauge mode | |
| 0 | 292 cpfseq EEDATA |
| 197 | 293 bra restart_3_test_ppO2_mode ; check for ppO2 mode |
| 294 bsf gauge_mode ; Set flag for gauge mode | |
| 295 bsf no_deco_customviews ; Set no-deco-mode-flag | |
| 296 return ; start in Surfacemode | |
| 0 | 297 restart_3_test_ppO2_mode: |
| 197 | 298 movlw d'2' ; const ppO2 mode |
| 0 | 299 cpfseq EEDATA |
| 197 | 300 bra restart_3_test_apnoe_mode; check for apnoe mode |
| 301 bsf FLAG_const_ppO2_mode ; Set flag for ppO2 mode | |
| 302 return ; start in Surfacemode | |
| 0 | 303 restart_3_test_apnoe_mode: |
| 197 | 304 movlw d'3' ; Apnoe mode |
| 0 | 305 cpfseq EEDATA |
| 197 | 306 bra restart_4_test_gf_mode ; check for GF OC mode |
| 307 bsf FLAG_apnoe_mode ; Set flag for Apnoe Mode | |
| 308 bsf no_deco_customviews ; Set no-deco-mode-flag | |
| 309 return ; start in Surfacemode | |
| 0 | 310 restart_4_test_gf_mode: |
| 197 | 311 movlw d'4' ; GF OC mode |
| 0 | 312 cpfseq EEDATA |
| 197 | 313 bra restart_5_test_gfO2_mode ; check for GF CC mode |
| 0 | 314 movlw d'1' |
| 197 | 315 movff WREG,char_I_deco_model ; Set Flagbyte for GF method |
| 45 | 316 ; Load GF values into RAM |
| 197 | 317 GETCUSTOM8 d'32' ; GF low |
| 318 movff EEDATA,char_I_GF_Low_percentage | |
| 319 GETCUSTOM8 d'33' ; GF high | |
| 320 movff EEDATA,char_I_GF_High_percentage | |
| 321 return ; start in Surfacemode | |
| 0 | 322 restart_5_test_gfO2_mode: |
| 197 | 323 movlw d'5' ; GF CC mode |
| 0 | 324 cpfseq EEDATA |
| 197 | 325 return ; Start in Surfacemode |
| 326 bsf FLAG_const_ppO2_mode ; Set flag for ppO2 mode | |
| 0 | 327 movlw d'1' |
| 197 | 328 movff WREG,char_I_deco_model ; Set Flagbyte for GF method |
| 137 | 329 ; Load GF values into RAM |
| 197 | 330 GETCUSTOM8 d'32' ; GF low |
| 163 | 331 movff EEDATA,char_I_GF_Low_percentage |
| 197 | 332 GETCUSTOM8 d'33' ; GF high |
| 163 | 333 movff EEDATA,char_I_GF_High_percentage |
| 197 | 334 return ; start in Surfacemode |
| 335 | |
| 336 ;============================================================================= | |
| 0 | 337 |
| 338 startup_screen1: | |
| 339 call PLED_ClearScreen | |
| 340 call PLED_startupscreen1 ; show startup sreen | |
| 341 startup_screen1_2: | |
| 342 movlw d'10' ; timeout for startup screen | |
| 343 movwf temp1 | |
| 344 WAITMS d'200' | |
| 345 bcf switch_left | |
| 346 bcf switch_right | |
| 347 screen1_loop: | |
| 337 | 348 btfsc uart_dump_screen ; Asked to dump screen contains ? |
| 349 call dump_screen ; Yes! | |
| 350 | |
| 0 | 351 btfsc onesecupdate ; do every second tasks? |
| 352 call set_dive_modes ; tests if depth>threshold | |
| 353 btfsc onesecupdate ; do every second tasks? | |
| 354 decf temp1,F | |
| 355 bcf onesecupdate ; every second tasks done | |
| 356 | |
| 357 tstfsz temp1 ; timout occured? | |
| 358 bra screen1_loop2 ; no | |
| 359 return | |
| 360 | |
| 361 screen1_loop2: | |
| 362 btfsc divemode ; Divemode active? | |
| 363 return | |
| 364 btfsc switch_left ; Ack? | |
| 365 return | |
| 366 btfsc switch_right ; Ack? | |
| 367 return | |
| 368 bra screen1_loop ; loop screen | |
| 369 | |
| 370 startup_screen2: | |
| 371 call PLED_ClearScreen ; Page 1 | |
| 372 call PLED_startupscreen2 ; show startup sreen | |
| 373 bra startup_screen1_2 | |
| 374 | |
| 375 startup_screen3a:; WARNING: Also used for decodescriptions and CF Warning screen! | |
| 376 movwf temp1 | |
| 377 WAITMS d'200' | |
| 378 bcf switch_left | |
| 379 bcf switch_right | |
| 380 screen3_loop: | |
| 337 | 381 btfsc uart_dump_screen ; Asked to dump screen contains ? |
| 382 call dump_screen ; Yes! | |
| 383 | |
| 0 | 384 btfsc onesecupdate ; do every second tasks? |
| 385 call set_dive_modes ; tests if depth>threshold | |
| 386 | |
| 387 btfsc onesecupdate ; do every second tasks? | |
| 388 decf temp1,F | |
| 389 bcf onesecupdate ; every second tasks done | |
| 390 | |
| 391 tstfsz temp1 ; timout occured? | |
| 392 bra screen3_loop2 ; no | |
| 393 return | |
| 394 screen3_loop2: | |
| 395 btfsc switch_left ; Ack? | |
| 396 return | |
| 397 btfsc switch_right ; Ack? | |
| 398 return | |
| 399 bra screen3_loop ; loop screen | |
| 400 | |
| 337 | 401 ;============================================================================= |
| 402 | |
| 306 | 403 first_start: |
| 404 movlw max_custom_number ; Defined in definitions.asm | |
| 405 movwf EEDATA | |
| 406 write_int_eeprom d'92' ; Store number of CF used in this firmware | |
| 407 bra start3 ; continue with normal start | |
| 408 | |
| 0 | 409 init: |
| 466 | 410 movlw OSCCON_VALUE |
| 0 | 411 movwf OSCCON |
| 412 | |
| 413 movlw b'00010001' ; I/O Ports | |
| 414 movwf TRISA | |
| 415 clrf PORTA | |
| 416 movlw b'00000011' | |
| 417 movwf TRISB | |
| 418 clrf PORTB | |
| 419 movlw b'11011101' ; UART | |
| 420 movwf TRISC | |
| 421 clrf PORTC | |
| 422 movlw b'00000000' | |
| 423 movwf TRISE | |
| 424 clrf PORTE | |
| 425 movlw b'00000000' | |
| 426 movwf TRISD | |
| 427 clrf PORTD | |
| 428 | |
| 429 movlw b'01000000' ; Bit6: PPL enable | |
| 430 movwf OSCTUNE | |
| 431 | |
| 466 | 432 movlw T0CON_VALUE ; Timer0 |
| 0 | 433 movwf T0CON |
| 434 | |
| 435 movlw b'00000111' ; Timer1 | |
| 436 movwf T1CON | |
| 437 | |
| 438 movlw b'11010000' ; Interrups | |
| 439 movwf INTCON | |
| 440 movlw b'00000101' | |
| 441 movwf INTCON2 | |
| 442 movlw b'00001000' | |
| 443 movwf INTCON3 | |
| 444 movlw b'00100001' | |
| 445 movwf PIE1 | |
| 446 movlw b'00000000' | |
| 447 movwf PIE2 | |
| 448 clrf RCON | |
| 449 | |
| 450 movlw b'00000000' ; A/D Converter | |
| 451 movwf ADCON0 | |
| 452 movlw b'00001110' | |
| 453 movwf ADCON1 | |
| 454 movlw b'10001010' ; Right justified | |
| 455 movwf ADCON2 | |
| 456 | |
| 457 clrf SSPCON1 ; Set I²C Mode | |
| 458 movlw b'00000000' | |
| 459 movwf SSPSTAT | |
| 460 movlw b'00101000' | |
| 461 movwf SSPCON1 | |
| 462 movlw b'00000000' | |
| 463 movwf SSPCON2 | |
| 466 | 464 movlw SSPADD_VALUE ; I²C Speed |
| 0 | 465 movwf SSPADD |
| 466 | |
| 467 clrf CCP1CON ; PWM Module off | |
| 468 clrf ECCP1CON ; PWM Module off | |
| 469 | |
| 470 movlw b'00000111' ; Comperator Module off | |
| 471 movwf CMCON | |
| 472 | |
| 473 movlw b'00100000' | |
| 474 movwf CANCON ; ECAN Module OFF | |
| 475 | |
| 476 movlw b'00100100' ; UART | |
| 477 movwf TXSTA | |
| 478 movlw b'10010000' | |
| 479 movwf RCSTA | |
| 480 movlw b'00001000' | |
| 481 movwf BAUDCON | |
| 482 clrf SPBRGH | |
| 466 | 483 movlw SPBRG_VALUE |
| 0 | 484 movwf SPBRG |
| 485 clrf RCREG | |
| 486 clrf PIR1 | |
| 487 return |