Mercurial > public > hwos_code
annotate src/i2c.asm @ 621:1ad0531e9078
3.01 release
| author | heinrichsweikamp |
|---|---|
| date | Sat, 23 Feb 2019 16:51:14 +0100 |
| parents | cd986267a5ca |
| children | c40025d8e750 be8787f2034d |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 604 | 3 ; File i2c.asm V2.99c |
| 0 | 4 ; |
| 560 | 5 ; I2C Interface |
| 6 ; | |
| 0 | 7 ; Copyright (c) 2012, JD Gascuel, HeinrichsWeikamp, all right reserved. |
| 8 ;============================================================================= | |
| 582 | 9 ; |
| 10 ; Compass0 | |
| 11 ; -------- | |
| 12 ; HMC5883L's read address (8-Bit): 0x3D | |
| 13 ; HMC5883L's write address (8-Bit): 0x3C | |
| 14 ; MMA8452Q's read address (8-Bit): 0x39 | |
| 15 ; MMA8452Q's write address (8-Bit): 0x38 | |
| 16 ; | |
| 17 ; Compass1 | |
| 18 ; -------- | |
| 19 ; LSM303D's read address (8-Bit): 0x3D | |
| 20 ; LSM303D's write address (8-Bit): 0x3C | |
| 21 ; | |
| 22 ; Compass2 | |
| 23 ; -------- | |
| 24 ; LSM303AGR's Compass read address (8-Bit): 0x3D | |
| 25 ; LSM303AGR's Compass write address (8-Bit): 0x3C | |
| 26 ; LSM303AGR's Acceleration read address (8-Bit): 0x33 | |
| 27 ; LSM303AGR's Acceleration write address (8-Bit): 0x32 | |
| 28 ; | |
| 29 ; RX Circuity | |
| 30 ; ----------- | |
| 31 ; RX Circuity read address (8-Bit): 0x51 | |
| 32 ; RX Circuity write address (8-Bit): 0x50 | |
| 33 ; | |
| 34 ; | |
| 35 | |
| 0 | 36 ; HISTORY |
| 37 ; 2012-08-22 : [mH] Creation | |
| 565 | 38 ; 2018-02-18 : [mH] Sync with hwOS Sport release |
| 0 | 39 |
| 40 | |
| 582 | 41 #include "hwos.inc" ; Mandatory header |
| 0 | 42 #include "wait.inc" |
| 113 | 43 #include "math.inc" |
| 560 | 44 #include "external_flash.inc" |
| 113 | 45 |
| 582 | 46 |
| 47 i2c CODE | |
| 48 | |
| 49 ;============================================================================= | |
| 0 | 50 |
| 51 I2C_TX: | |
| 582 | 52 movwf SSP1BUF |
| 53 rcall WaitMSSP | |
| 604 | 54 bra I2C_WaitforACK ; returns... |
| 0 | 55 |
| 604 | 56 I2C_TwoBytesRX_div16: ; get two bytes and divide lo:hi/16 (signed) |
| 57 rcall I2C_OneByteRX ; get one byte | |
| 58 movff SSP1BUF,hi ; data byte | |
| 59 rcall I2C_OneByteRX ; get one byte | |
| 60 movff SSP1BUF,lo ; data byte | |
| 582 | 61 I2C_TwoBytesRX_div16_2: ; divide lo:hi/16 (signed) only |
| 62 bcf STATUS,C | |
| 604 | 63 btfsc hi,7 ; copy sign bit to carry |
| 582 | 64 bsf STATUS,C |
| 65 rrcf hi ; /2 | |
| 66 rrcf lo | |
| 67 I2C_TwoBytesRX_div8_2: ; divide lo:hi/8 (signed) only | |
| 68 bcf STATUS,C | |
| 604 | 69 btfsc hi,7 ; copy sign bit to carry |
| 582 | 70 bsf STATUS,C |
| 71 rrcf hi ; /4 | |
| 72 rrcf lo | |
| 73 bcf STATUS,C | |
| 604 | 74 btfsc hi,7 ; copy sign bit to carry |
| 582 | 75 bsf STATUS,C |
| 76 rrcf hi ; /8 | |
| 77 rrcf lo | |
| 78 bcf STATUS,C | |
| 604 | 79 btfsc hi,7 ; copy sign bit to carry |
| 582 | 80 bsf STATUS,C |
| 81 rrcf hi ; /16 | |
| 82 rrcf lo | |
| 83 return | |
| 0 | 84 |
| 582 | 85 global I2C_RX_accelerometer |
| 0 | 86 I2C_RX_accelerometer: |
| 604 | 87 btfsc compass_type2 ; compass2 ? |
| 88 bra I2C_RX_accelerometer_compass2 ; YES | |
| 89 btfsc compass_type ; compass1 ? | |
| 90 bra I2C_RX_accelerometer_compass1 ; YES | |
| 560 | 91 I2C_RX_accelerometer_compass0: |
| 604 | 92 bsf SSP1CON2,SEN ; start condition |
| 582 | 93 rcall WaitMSSP |
| 94 movlw 0x38 ; address | |
| 95 rcall I2C_TX | |
| 96 movlw 0x00 | |
| 97 rcall I2C_TX | |
| 604 | 98 bsf SSP1CON2,RSEN ; repeated start condition |
| 582 | 99 rcall WaitMSSP |
| 100 movlw 0x39 ; address | |
| 101 rcall I2C_TX | |
| 0 | 102 |
| 604 | 103 rcall I2C_OneByteRX ; get status byte |
| 582 | 104 movf SSP1BUF,W |
| 158 | 105 |
| 582 | 106 ; Non-flipped screen: |
| 107 ; Chip orientation on the PCB requires | |
| 604 | 108 ; Original = corrected |
| 582 | 109 ; x = -x |
| 110 ; y = -y | |
| 111 ; z = -z | |
| 0 | 112 |
| 582 | 113 ; Flipped screen: |
| 114 ; Chip orientation on the PCB requires | |
| 604 | 115 ; Original = corrected |
| 582 | 116 ; x = x |
| 117 ; y = y | |
| 118 ; z = -z | |
|
166
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BUGFIX: Flip compass with flipped screen, too
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|
119 |
| 604 | 120 rcall I2C_TwoBytesRX_div16 ; get two bytes and divide /16 (signed) |
| 582 | 121 btfsc flip_screen ; 180° rotation ? |
| 604 | 122 bra I2C_RX_accelerometer2 ; YES |
| 123 comf hi ; 16 bit sign change | |
| 582 | 124 negf lo |
| 604 | 125 btfsc STATUS,C ; carry to propagate ? |
| 126 incf hi,F ; YES - do it | |
|
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|
127 I2C_RX_accelerometer2: |
| 582 | 128 movff lo,accel_DX+0 |
| 129 movff hi,accel_DX+1 ; Copy result | |
| 0 | 130 |
| 582 | 131 rcall I2C_TwoBytesRX_div16 ; Get two bytes and divide /16 (signed) |
| 132 btfsc flip_screen ; 180° rotation ? | |
| 133 bra I2C_RX_accelerometer3 ; Yes | |
| 134 comf hi ; 16bit sign change. | |
| 135 negf lo | |
| 136 btfsc STATUS,C ; Carry to propagate ? | |
| 137 incf hi,F ; YES: do it. | |
|
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BUGFIX: Flip compass with flipped screen, too
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|
138 I2C_RX_accelerometer3: |
| 582 | 139 movff lo,accel_DY+0 |
| 140 movff hi,accel_DY+1 ; Copy result | |
| 0 | 141 |
| 582 | 142 rcall I2C_OneByteRX ; Get one byte |
| 143 movff SSP1BUF,hi ; Data Byte | |
| 144 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 145 rcall WaitMSSP | |
| 146 ; According to data sheet there should be no Master Acknowledge for the last Byte (accel_DZ+0)... | |
| 147 movff SSP1BUF,lo ; Data Byte | |
| 0 | 148 |
| 582 | 149 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only |
| 150 comf hi ; 16bit sign change. | |
| 151 negf lo | |
| 152 btfsc STATUS,C ; Carry to propagate ? | |
| 153 incf hi,F ; YES: do it. | |
| 154 movff lo,accel_DZ+0 | |
| 155 movff hi,accel_DZ+1 ; Copy result | |
| 0 | 156 |
| 582 | 157 bsf SSP1CON2,PEN ; Stop condition |
| 158 bra WaitMSSP ; (And return) | |
| 0 | 159 |
| 427 | 160 I2C_RX_accelerometer_compass1: |
| 582 | 161 bsf SSP1CON2,SEN ; Start condition |
| 162 rcall WaitMSSP | |
| 163 movlw 0x3C ; address | |
| 164 rcall I2C_TX | |
| 165 movlw b'10101000' ; 0x28 with auto-increment (MSB=1) | |
| 166 rcall I2C_TX | |
| 167 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 168 rcall WaitMSSP | |
| 169 movlw 0x3D ; address | |
| 170 I2C_RX_accelerometer_compass1_xx: ; compass2 continues here... | |
| 171 rcall I2C_TX | |
| 172 | |
| 173 ; Non-flipped screen: | |
| 174 ; Chip orientation on the PCB requires | |
| 175 ; Original = Corrected | |
| 176 ; x = -x (Compass 1) | |
| 177 ; x = x (Compass 2) | |
| 178 ; y = -y | |
| 179 ; z = -z | |
| 180 | |
| 181 ; Flipped screen: | |
| 182 ; Chip orientation on the PCB requires | |
| 183 ; Original = Corrected | |
| 184 ; x = x (Compass 1) | |
| 185 ; x = -x (Compass 2) | |
| 186 ; y = y | |
| 187 ; z = -z | |
| 427 | 188 |
| 582 | 189 ; Dump the accelerator data |
| 190 rcall I2C_OneByteRX | |
| 191 movff SSP1BUF,lo ; accel_DX+0 | |
| 192 rcall I2C_OneByteRX | |
| 193 movff SSP1BUF,hi ;accel_DX+1 | |
| 194 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 195 btfss compass_type2 ; compass 2? | |
| 196 bra I2C_RX_accelerometer1_c1 ; No, compass 1 | |
| 197 ; compass 2 | |
| 198 btfss flip_screen ; 180° rotation ? | |
| 199 bra I2C_RX_accelerometer2_c1 ; No, continue with normal compass1 routines for Y and Z | |
| 200 ; flipped compass 2, negate x | |
| 201 comf hi ; 16bit sign change. | |
| 202 negf lo | |
| 203 btfsc STATUS,C ; Carry to propagate ? | |
| 204 incf hi,F ; YES: do it. | |
| 205 bra I2C_RX_accelerometer2_c1 ; continue with normal compass1 routines for Y and Z | |
| 206 | |
| 207 I2C_RX_accelerometer1_c1: | |
| 208 btfsc flip_screen ; 180° rotation ? | |
| 209 bra I2C_RX_accelerometer2_c1 ; Yes | |
| 210 ; non-flipped compass 1, negate x | |
| 211 comf hi ; 16bit sign change. | |
| 212 negf lo | |
| 213 btfsc STATUS,C ; Carry to propagate ? | |
| 214 incf hi,F ; YES: do it. | |
| 427 | 215 I2C_RX_accelerometer2_c1: |
| 582 | 216 ; flipped compass 1, non-flipped compass 2 |
| 217 movff lo,accel_DX+0 | |
| 218 movff hi,accel_DX+1 ; Copy result | |
| 219 rcall I2C_OneByteRX | |
| 220 movff SSP1BUF,lo ; accel_DY+0 | |
| 221 rcall I2C_OneByteRX | |
| 222 movff SSP1BUF,hi ; accel_DY+1 | |
| 223 | |
| 224 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 225 btfsc flip_screen ; 180° rotation ? | |
| 226 bra I2C_RX_accelerometer3_c1 ; Yes | |
| 227 comf hi ; 16bit sign change. | |
| 228 negf lo | |
| 229 btfsc STATUS,C ; Carry to propagate ? | |
| 230 incf hi,F ; YES: do it. | |
| 427 | 231 I2C_RX_accelerometer3_c1: |
| 582 | 232 movff lo,accel_DY+0 |
| 233 movff hi,accel_DY+1 ; Copy result | |
| 427 | 234 |
| 582 | 235 rcall I2C_OneByteRX |
| 236 movff SSP1BUF,lo ;accel_DZ+0 | |
| 237 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 238 rcall WaitMSSP | |
| 239 ; According to data sheet there should be no Master Acknowledge for the last Byte (accel_DZ+1)... | |
| 240 movff SSP1BUF,hi ;accel_DZ+1 | |
| 241 bsf SSP1CON2,PEN ; Stop condition | |
| 242 rcall WaitMSSP | |
| 243 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 244 comf hi ; 16bit sign change for Z | |
| 245 negf lo | |
| 246 btfsc STATUS,C ; Carry to propagate ? | |
| 247 incf hi,F ; YES: do it. | |
| 248 movff lo,accel_DZ+0 | |
| 249 movff hi,accel_DZ+1 ; Copy result | |
| 250 return | |
| 251 | |
| 560 | 252 I2C_RX_accelerometer_compass2: |
| 582 | 253 bsf SSP1CON2,SEN ; Start condition |
| 254 rcall WaitMSSP | |
| 255 movlw 0x32 ; address | |
| 256 rcall I2C_TX | |
| 257 movlw b'10101000' ; 0x28 with auto-increment (MSB=1) | |
| 258 rcall I2C_TX | |
| 259 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 260 rcall WaitMSSP | |
| 261 movlw 0x33 ; address | |
| 262 bra I2C_RX_accelerometer_compass1_xx | |
| 263 | |
| 0 | 264 I2C_OneByteRX: |
| 582 | 265 bsf SSP1CON2,RCEN ; Enable receive mode |
| 266 rcall WaitMSSP | |
| 267 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 268 bra WaitMSSP ; And return! | |
| 0 | 269 |
| 582 | 270 global I2C_RX_compass |
| 0 | 271 I2C_RX_compass: |
| 582 | 272 btfsc compass_type2 ; compass2 |
| 273 bra I2C_RX_compass2 ; yes | |
| 274 btfsc compass_type ; compass1? | |
| 275 bra I2C_RX_compass1 ; yes | |
| 560 | 276 I2C_RX_compass0: |
| 582 | 277 bsf SSP1CON2,SEN ; Start condition |
| 278 rcall WaitMSSP | |
| 279 movlw 0x3C ; address | |
| 280 rcall I2C_TX | |
| 281 movlw 0x03 | |
| 282 rcall I2C_TX | |
| 283 bsf SSP1CON2,PEN ; Stop condition | |
| 284 rcall WaitMSSP | |
| 0 | 285 |
| 582 | 286 bcf PIR1,SSP1IF |
| 287 bsf SSP1CON2,SEN ; Start condition | |
| 288 rcall WaitMSSP | |
| 289 movlw 0x3D ; address | |
| 290 rcall I2C_TX | |
| 0 | 291 |
| 582 | 292 ; Compass IC sends data in following order: |
| 293 ; x MSB | |
| 294 ; x LSB | |
| 295 ; z MSB | |
| 296 ; z LSB | |
| 297 ; y MSB | |
| 298 ; y LSB | |
| 0 | 299 |
| 582 | 300 ; Non-flipped screen |
| 301 ; Chip orientation on the PCB requires | |
| 302 ; Original = Corrected | |
| 303 ; x = -y | |
| 304 ; z = z | |
| 305 ; y = x | |
| 0 | 306 |
| 582 | 307 ; Flipped screen |
| 308 ; Chip orientation on the PCB requires | |
| 309 ; Original = Corrected | |
| 310 ; x = y | |
| 311 ; z = z | |
| 312 ; y = -x | |
|
166
30ebaf72170d
BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents:
158
diff
changeset
|
313 |
| 582 | 314 rcall I2C_OneByteRX ; Get one byte |
| 315 movff SSP1BUF,compass_DY+1 ; Data Byte | |
| 316 rcall I2C_OneByteRX ; Get one byte | |
| 317 movff SSP1BUF,compass_DY+0 ; Data Byte | |
| 318 btfsc flip_screen ; 180° rotation ? | |
| 319 bra I2C_RX_compass0_2 ; Yes | |
| 320 banksel compass_DY | |
| 321 comf compass_DY+1 ; 16bit sign change. | |
| 322 negf compass_DY+0 | |
| 323 btfsc STATUS,C ; Carry to propagate ? | |
| 324 incf compass_DY+1,F ; YES: do it. | |
| 560 | 325 I2C_RX_compass0_2: |
| 582 | 326 banksel common |
| 327 rcall I2C_OneByteRX ; Get one byte | |
| 328 movff SSP1BUF,compass_DZ+1 ; Data Byte | |
| 329 rcall I2C_OneByteRX ; Get one byte | |
| 330 movff SSP1BUF,compass_DZ+0 ; Data Byte | |
| 331 rcall I2C_OneByteRX ; Get one byte | |
| 332 movff SSP1BUF,compass_DX+1 ; Data Byte | |
| 333 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 334 rcall WaitMSSP | |
| 335 movff SSP1BUF,compass_DX+0 ; Data Byte | |
| 336 bsf SSP1CON2,PEN ; Stop condition | |
| 337 rcall WaitMSSP | |
| 338 btfss flip_screen ; 180° rotation ? | |
| 339 return ; No, done. | |
| 340 ; Yes, flip X | |
| 341 banksel compass_DX | |
| 342 comf compass_DX+1 ; 16bit sign change. | |
| 343 negf compass_DX+0 | |
| 344 btfsc STATUS,C ; Carry to propagate ? | |
| 345 incf compass_DX+1,F ; YES: do it. | |
| 346 banksel common | |
| 347 return | |
| 348 | |
| 349 I2C_RX_compass1: ; New compass | |
| 350 bsf SSP1CON2,SEN ; Start condition | |
| 351 rcall WaitMSSP | |
| 352 movlw 0x3C ; address | |
| 353 rcall I2C_TX | |
| 354 movlw b'10001000' ; 0x08 with auto-increment (MSB=1) | |
| 355 rcall I2C_TX | |
| 356 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 357 rcall WaitMSSP | |
| 358 movlw 0x3D ; address | |
| 359 rcall I2C_TX | |
| 360 ;rcall WaitMSSP ; Needed? (mH) | |
| 361 rcall I2C_OneByteRX ; Get one byte | |
| 362 movff SSP1BUF,lo ; Data Byte | |
| 363 rcall I2C_OneByteRX ; Get one byte | |
| 364 movff SSP1BUF,hi ; Data Byte | |
| 365 rcall I2C_TwoBytesRX_div8_2 | |
| 366 movff lo,compass_DX+0 | |
| 367 movff hi,compass_DX+1 | |
| 368 btfss flip_screen ; 180° rotation ? | |
| 369 bra I2C_RX_compass1_1 ; Yes | |
| 370 ; Yes, flip X | |
| 371 banksel compass_DX | |
| 372 comf compass_DX+1 ; 16bit sign change. | |
| 373 negf compass_DX+0 | |
| 374 btfsc STATUS,C ; Carry to propagate ? | |
| 375 incf compass_DX+1,F ; YES: do it. | |
| 376 banksel common | |
| 427 | 377 I2C_RX_compass1_1: |
| 582 | 378 rcall I2C_OneByteRX ; Get one byte |
| 379 movff SSP1BUF,lo ; Data Byte | |
| 380 rcall I2C_OneByteRX ; Get one byte | |
| 381 movff SSP1BUF,hi ; Data Byte | |
| 382 rcall I2C_TwoBytesRX_div8_2 | |
| 383 movff lo,compass_DY+0 | |
| 384 movff hi,compass_DY+1 | |
| 385 btfss flip_screen ; 180° rotation ? | |
| 386 bra I2C_RX_compass1_2 ; Yes | |
| 387 ; Yes, flip Y | |
| 388 banksel compass_DY | |
| 389 comf compass_DY+1 ; 16bit sign change. | |
| 390 negf compass_DY+0 | |
| 391 btfsc STATUS,C ; Carry to propagate ? | |
| 392 incf compass_DY+1,F ; YES: do it. | |
| 427 | 393 I2C_RX_compass1_2: |
| 582 | 394 banksel common |
| 395 rcall I2C_OneByteRX ; Get one byte | |
| 396 movff SSP1BUF,lo ; Data Byte | |
| 397 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 398 rcall WaitMSSP | |
| 399 movff SSP1BUF,hi ; Data Byte | |
| 400 rcall I2C_TwoBytesRX_div8_2 | |
| 401 movff lo,compass_DZ+0 | |
| 402 movff hi,compass_DZ+1 | |
| 403 bsf SSP1CON2,PEN ; Stop condition | |
| 404 bra WaitMSSP ;(And return) | |
| 560 | 405 |
| 582 | 406 I2C_RX_compass2: ; newest compass |
| 407 bsf SSP1CON2,SEN ; Start condition | |
| 408 rcall WaitMSSP | |
| 409 movlw 0x3C ; address | |
| 410 rcall I2C_TX | |
| 411 movlw 0xE8 ; 0x68 with auto-increment (MSB=1) | |
| 412 rcall I2C_TX | |
| 413 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 414 rcall WaitMSSP | |
| 415 movlw 0x3D ; address | |
| 416 rcall I2C_TX | |
| 417 ; rcall WaitMSSP | |
| 418 rcall I2C_OneByteRX ; Get one byte | |
| 419 movff SSP1BUF,lo ; Data Byte | |
| 420 rcall I2C_OneByteRX ; Get one byte | |
| 421 movff SSP1BUF,hi ; Data Byte | |
| 422 ; rcall I2C_TwoBytesRX_div8_2 | |
| 423 btfsc flip_screen ; 180° rotation ? | |
| 424 bra I2C_RX_compass2_1 ; Yes, do nothing with X | |
| 425 ; No, flip X | |
| 426 comf hi ; 16bit sign change. | |
| 427 negf lo | |
| 428 btfsc STATUS,C ; Carry to propagate ? | |
| 429 incf hi,F ; YES: do it. | |
| 430 I2C_RX_compass2_1: | |
| 431 movff lo,compass_DX+0 | |
| 432 movff hi,compass_DX+1 | |
| 433 rcall I2C_OneByteRX ; Get one byte | |
| 434 movff SSP1BUF,lo ; Data Byte | |
| 435 rcall I2C_OneByteRX ; Get one byte | |
| 436 movff SSP1BUF,hi ; Data Byte | |
| 437 ; rcall I2C_TwoBytesRX_div8_2 | |
| 438 btfss flip_screen ; 180° rotation ? | |
| 439 bra I2C_RX_compass2_2 ; No, do nothing with Y | |
| 440 ; Yes, flip Y | |
| 441 comf hi ; 16bit sign change. | |
| 442 negf lo | |
| 443 btfsc STATUS,C ; Carry to propagate ? | |
| 444 incf hi,F ; YES: do it. | |
| 560 | 445 I2C_RX_compass2_2: |
| 582 | 446 movff lo,compass_DY+0 |
| 447 movff hi,compass_DY+1 | |
| 448 rcall I2C_OneByteRX ; Get one byte | |
| 449 movff SSP1BUF,lo ; Data Byte | |
| 450 rcall I2C_OneByteRX ; Get one byte | |
| 451 movff SSP1BUF,hi ; Data Byte | |
| 452 ; rcall I2C_TwoBytesRX_div8_2 | |
| 453 movff lo,compass_DZ+0 | |
| 454 movff hi,compass_DZ+1 | |
| 455 bsf SSP1CON2,PEN ; Stop condition | |
| 456 bra WaitMSSP ;(And return) | |
| 457 | |
| 458 | |
| 459 global I2C_init_compass | |
| 0 | 460 I2C_init_compass: |
| 582 | 461 bsf compass_enabled |
| 462 bcf compass_type2 | |
| 463 ; probe compass 2 | |
| 464 bsf SSP1CON2,SEN ; Start condition | |
| 465 rcall WaitMSSP | |
| 466 movlw 0x32 ; Address byte + Write bit | |
| 467 movwf SSP1BUF ; control byte | |
| 468 rcall WaitMSSP | |
| 469 btfss SSP1CON2,ACKSTAT ; ACK? | |
| 470 bsf compass_type2 ; ACK send. compass2 present | |
| 471 bsf SSP1CON2,PEN ; Stop condition | |
| 472 rcall WaitMSSP | |
| 427 | 473 |
| 582 | 474 btfsc compass_type2 |
| 475 bra I2C_init_compass2 ; Compass2 | |
| 476 ; Check for compass0 or compass1... | |
| 477 bsf compass_type ; set flag | |
| 478 bsf SSP1CON2,SEN ; Start condition | |
| 479 rcall WaitMSSP | |
| 480 movlw 0x3C ; address | |
| 481 rcall I2C_TX | |
| 482 movlw 0x0F | |
| 483 rcall I2C_TX | |
| 484 bsf SSP1CON2,PEN ; Stop condition | |
| 485 rcall WaitMSSP | |
| 486 bcf PIR1,SSP1IF | |
| 487 bsf SSP1CON2,SEN ; Start condition | |
| 488 rcall WaitMSSP | |
| 489 movlw 0x3D ; address | |
| 490 rcall I2C_TX | |
| 491 rcall I2C_OneByteRX ; Get one byte | |
| 492 movlw 0x49 ; 0x49 = Compass1 | |
| 493 cpfseq SSP1BUF | |
| 494 bcf compass_type ; clear flag | |
| 495 bsf SSP1CON2,PEN ; Stop condition | |
| 496 rcall WaitMSSP | |
| 497 | |
| 498 btfsc compass_type ; compass1? | |
| 499 bra I2C_init_compass1 ; yes | |
| 427 | 500 ; init compass0 |
| 582 | 501 bsf SSP1CON2,SEN ; Start condition |
| 502 rcall WaitMSSP | |
| 503 movlw 0x3C ; address | |
| 504 rcall I2C_TX | |
| 505 movlw 0x00 | |
| 506 rcall I2C_TX | |
| 507 ; movlw b'01101001' ; ConfigA: 3Hz, 8 Samples averaged, Test Mode (Positive Bias) | |
| 508 movlw b'01101000' ; ConfigA: 3Hz, 8 Samples averaged | |
| 509 rcall I2C_TX | |
| 20 | 510 I2C_init_compass_common: |
| 582 | 511 movff opt_compass_gain,i2c_temp1 ; 0-7 (230LSB/Gauss to 1370LSB/Gauss) |
| 512 swapf i2c_temp1,F | |
| 513 comf i2c_temp1,F | |
| 514 bcf STATUS,C | |
| 515 rlcf i2c_temp1 | |
| 516 movf i2c_temp1,W | |
| 517 clrf i2c_temp1 | |
| 518 rcall I2C_TX | |
| 519 movlw b'00000000' ; Continuous Mode | |
| 520 rcall I2C_TX | |
| 521 bsf SSP1CON2,PEN ; Stop condition | |
| 522 bra WaitMSSP ; (And return) | |
| 0 | 523 |
| 427 | 524 I2C_init_compass1: |
| 582 | 525 bsf SSP1CON2,SEN ; Start condition |
| 526 rcall WaitMSSP | |
| 527 movlw 0x3C ; address | |
| 528 rcall I2C_TX | |
| 529 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 530 rcall I2C_TX | |
| 531 movlw b'00000000' ; CTRL0 | |
| 532 rcall I2C_TX | |
| 533 movlw b'00101111' ; CTRL1 (6,25Hz, BDU=0, x,y,z = ON) | |
| 534 rcall I2C_TX | |
| 535 movlw b'11000000' ; CTRL2 (50Hz, +/-2g, | |
| 536 rcall I2C_TX | |
| 537 movlw b'00000000' ; CTRL3 | |
| 538 rcall I2C_TX | |
| 539 movlw b'00000000' ; CTRL4 | |
| 540 rcall I2C_TX | |
| 541 movlw b'01100100' ; CTRL5 HIGH res, 6,25Hz | |
| 542 rcall I2C_TX | |
| 429 | 543 init_compass1_common: |
| 582 | 544 movff opt_compass_gain,i2c_temp1 ; 0-7 (230LSB/Gauss to 1370LSB/Gauss) +++ |
| 545 movlw b'01100000' ; CTRL6 Full scale (+/-12 Gauss -> 2730LSB/Gauss) | |
| 546 dcfsnz i2c_temp1,F ; = 1? | |
| 547 movlw b'01100000' ; Yes, CTRL6 Full scale (+/-12 Gauss -> 2730LSB/Gauss) | |
| 548 dcfsnz i2c_temp1,F ; = 2? | |
| 549 movlw b'01000000' ; Yes, CTRL6 (+/-8 Gauss) | |
| 550 dcfsnz i2c_temp1,F ; = 3? | |
| 551 movlw b'01000000' ; Yes, CTRL6 (+/-8 Gauss) | |
| 552 dcfsnz i2c_temp1,F ; = 4? | |
| 553 movlw b'00100000' ; Yes, CTRL6 (+/-4 Gauss) | |
| 554 dcfsnz i2c_temp1,F ; = 5? | |
| 555 movlw b'00100000' ; Yes, CTRL6 (+/-4 Gauss) | |
| 556 dcfsnz i2c_temp1,F ; = 6? | |
| 557 movlw b'00000000' ; Yes, CTRL6 (+/-2 Gauss) | |
| 558 dcfsnz i2c_temp1,F ; = 7? | |
| 559 movlw b'00000000' ; Yes, CTRL6 (+/-2 Gauss) | |
| 560 rcall I2C_TX | |
| 561 movlw b'00000000' ; CTRL7 Continuous Mode | |
| 562 rcall I2C_TX | |
| 563 bsf SSP1CON2,PEN ; Stop condition | |
| 564 bra WaitMSSP ; (And return) | |
| 565 | |
| 560 | 566 I2C_init_compass2: |
| 608 | 567 bsf SSP1CON2,SEN ; Start condition |
| 568 rcall WaitMSSP | |
| 569 movlw 0x3C ; address | |
| 570 rcall I2C_TX | |
| 571 movlw 0xE0 ; 0x60 with auto-increment (MSB=1) | |
| 572 rcall I2C_TX | |
| 573 movlw b'00000000' ; CFG_REG_A_M (10Hz, Continuous) 0x60 | |
| 574 rcall I2C_TX | |
| 575 movlw b'00000000' ; CFG_REG_B_M (Low-Pass Filter off) 0x61 (set pulse is released every 63 ODR) | |
| 576 rcall I2C_TX | |
| 577 movlw b'00000000' ; CFG_REG_C_M BDU=0 0x62 | |
| 578 rcall I2C_TX | |
| 579 bsf SSP1CON2,PEN ; Stop condition | |
| 580 bra WaitMSSP ;(And return) | |
| 582 | 581 |
| 582 | |
| 583 global I2C_sleep_compass | |
| 0 | 584 I2C_sleep_compass: |
| 582 | 585 bcf compass_enabled |
| 586 btfsc compass_type2 ; compass2? | |
| 587 bra I2C_sleep_compass2 ; yes | |
| 588 btfsc compass_type ; compass1? | |
| 589 bra I2C_sleep_compass1 ; yes | |
| 560 | 590 I2C_sleep_compass0: |
| 582 | 591 bsf SSP1CON2,SEN ; Start condition |
| 592 rcall WaitMSSP | |
| 593 movlw 0x3C ; address | |
| 594 rcall I2C_TX | |
| 595 movlw 0x00 | |
| 596 rcall I2C_TX | |
| 597 movlw b'01101000' ; ConfigA | |
| 598 rcall I2C_TX | |
| 599 movlw b'00100000' ; ConfigB | |
| 600 rcall I2C_TX | |
| 601 movlw b'00000010' ; Idle Mode | |
| 602 rcall I2C_TX | |
| 603 bsf SSP1CON2,PEN ; Stop condition | |
| 604 bra WaitMSSP ; (And return) | |
| 0 | 605 |
| 427 | 606 I2C_sleep_compass1: |
| 582 | 607 bsf SSP1CON2,SEN ; Start condition |
| 608 rcall WaitMSSP | |
| 609 movlw 0x3C ; address | |
| 610 rcall I2C_TX | |
| 611 movlw 0x20 ; CTRL_REG1 | |
| 612 rcall I2C_TX | |
| 613 movlw b'00000000' ; data for CTRL_REG1: acceleration sensor Power-down mode | |
| 614 rcall I2C_TX | |
| 615 bsf SSP1CON2,PEN ; Stop condition | |
| 616 rcall WaitMSSP | |
| 617 bsf SSP1CON2,SEN ; Start condition | |
| 618 rcall WaitMSSP | |
| 619 movlw 0x3C ; address | |
| 620 rcall I2C_TX | |
| 621 movlw 0x26 ; CTRL_REG7 | |
| 622 rcall I2C_TX | |
| 623 movlw b'00000010' ; data for CTRL_REG7: magnetic sensor Power-down mode | |
| 624 rcall I2C_TX | |
| 625 bsf SSP1CON2,PEN ; Stop condition | |
| 626 bra WaitMSSP ;(And return) | |
| 560 | 627 |
| 628 I2C_sleep_compass2: | |
| 608 | 629 ; magnetic |
| 630 bsf SSP1CON2,SEN ; Start condition | |
| 631 rcall WaitMSSP | |
| 632 movlw 0x3C ; address | |
| 633 rcall I2C_TX | |
| 634 movlw 0xE0 ; 0x60 with auto-increment (MSB=1) | |
| 635 rcall I2C_TX | |
| 636 movlw b'00000011' ; CFG_REG_A_M (Idle mode) 0x60 | |
| 637 rcall I2C_TX | |
| 638 movlw b'00000100' ; CFG_REG_B_M 0x61 (set pulse is released only at power-on after PD condition) | |
| 639 rcall I2C_TX | |
| 640 movlw b'01010001' ; CFG_REG_C_M 0x62 | |
| 641 rcall I2C_TX | |
| 642 movlw b'00000000' ; INT_CTRL_REG_M 0x63 | |
| 643 rcall I2C_TX | |
| 582 | 644 |
| 608 | 645 bsf SSP1CON2,PEN ; Stop condition |
| 646 bra WaitMSSP ; (And return) | |
| 647 | |
| 560 | 648 I2C_sleep_accelerometer2: |
| 608 | 649 ; accelerometer |
| 650 bsf SSP1CON2,SEN ; Start condition | |
| 651 rcall WaitMSSP | |
| 652 movlw 0x32 ; address | |
| 653 rcall I2C_TX | |
| 654 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 655 rcall I2C_TX | |
| 656 movlw b'00000000' ; TEMP_CFG_REG_A (Temp sensor off) 0x1F | |
| 657 rcall I2C_TX | |
| 658 movlw b'00000000' ; CTRL_REG1_A (All off) 0x20 | |
| 659 rcall I2C_TX | |
| 660 bsf SSP1CON2,PEN ; Stop condition | |
| 661 bra WaitMSSP ; (And return) | |
| 0 | 662 |
| 615 | 663 WaitMSSP: |
| 664 decfsz i2c_temp1,F ; check for timeout during I2C action | |
| 665 bra WaitMSSP2 | |
| 666 bra I2CFail ; timeout occurred | |
| 667 WaitMSSP2: | |
| 668 btfss PIR1,SSP1IF | |
| 669 bra WaitMSSP | |
| 670 clrf i2c_temp1 | |
| 671 bcf PIR1,SSP1IF | |
| 672 return | |
| 673 | |
| 674 I2C_WaitforACK: | |
| 675 btfss SSP1CON2,ACKSTAT ; checks for ACK bit from slave | |
| 676 return | |
| 677 I2CFail: | |
| 678 rcall I2CReset ; I2C Reset | |
| 679 bcf PIR1,SSP1IF | |
| 680 clrf i2c_temp1 | |
| 681 bsf i2c_error_flag ; set error flag | |
| 682 return | |
| 683 | |
| 684 I2CReset: ; something went wrong (slave holds SDA low?) | |
| 685 clrf SSP1CON1 ; wake-up slave and reset entire module | |
| 686 clrf SSP1CON2 | |
| 687 clrf SSP1STAT | |
| 688 bcf TRISC,3 ; SCL OUTPUT | |
| 689 bsf TRISC,4 ; SDA input | |
| 690 bcf PORTC,3 | |
| 691 movlw d'9' | |
| 692 movwf i2c_temp1 ; clock-out 9 clock cycles manually | |
| 693 I2CReset_1: | |
| 694 bsf PORTC,3 ; SCL = 1 | |
| 695 nop | |
| 696 nop | |
| 697 nop | |
| 698 nop | |
| 699 btfsc PORTC,4 ; SDA = 1 ? | |
| 700 bra I2CReset_2 ; YES - =1, SDA has been released from slave | |
| 701 bcf PORTC,3 ; NO - set SCL = 0 | |
| 702 nop | |
| 703 nop | |
| 704 bcf PORTC,3 | |
| 705 nop | |
| 706 nop | |
| 707 decfsz i2c_temp1,F | |
| 708 bra I2CReset_1 ; check for nine clock cycles | |
| 709 I2CReset_2: | |
| 710 bsf TRISC,3 ; SCL Input | |
| 711 clrf SSP1CON1 ; setup I²C mode | |
| 712 WAITMS d'10' ; reset-timeout for I2C devices | |
| 713 movlw b'00000000' ; with slew rate control | |
| 714 movwf SSP1STAT | |
| 715 movlw b'00101000' | |
| 716 movwf SSP1CON1 | |
| 717 movlw b'00000000' | |
| 718 movwf SSP1CON2 | |
| 719 movlw 0x27 | |
| 720 movwf SSP1ADD | |
| 721 return | |
| 722 | |
| 582 | 723 global I2C_init_accelerometer |
| 0 | 724 I2C_init_accelerometer: |
| 582 | 725 btfsc compass_type2 ; compass2? |
| 726 bra I2C_init_accelerometer2 ; Yes. | |
| 560 | 727 |
| 582 | 728 btfsc compass_type ; compass1? |
| 729 return ; yes, ignore | |
| 427 | 730 |
| 582 | 731 rcall I2C_sleep_accelerometer ; Regs can only be changed in St.By mode |
| 0 | 732 |
| 582 | 733 bsf SSP1CON2,SEN ; Start condition |
| 734 rcall WaitMSSP | |
| 735 movlw 0x38 ; address | |
| 736 rcall I2C_TX | |
| 737 movlw 0x0E ; XYZ_DATA_CFG | |
| 738 rcall I2C_TX | |
| 739 movlw b'00000000' ; High pass Filter=0 , +/- 2g range | |
| 740 rcall I2C_TX | |
| 741 bsf SSP1CON2,PEN ; Stop condition | |
| 742 rcall WaitMSSP | |
| 0 | 743 |
| 582 | 744 bsf SSP1CON2,SEN ; Start condition |
| 745 rcall WaitMSSP | |
| 746 movlw 0x38 ; address | |
| 747 rcall I2C_TX | |
| 748 movlw 0x2A ; CTRL_REG1 | |
| 749 rcall I2C_TX | |
| 750 ; movlw b'00110000' ; CTRL_REG1: 160ms data rate, St.By Mode | |
| 751 movlw b'00110100' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode | |
| 752 rcall I2C_TX | |
| 753 movlw b'00000010' ; CTRL_REG2: High Res in Active mode | |
| 754 rcall I2C_TX | |
| 755 bsf SSP1CON2,PEN ; Stop condition | |
| 756 rcall WaitMSSP | |
| 0 | 757 |
| 582 | 758 bsf SSP1CON2,SEN ; Start condition |
| 759 rcall WaitMSSP | |
| 760 movlw 0x38 ; address | |
| 761 rcall I2C_TX | |
| 762 movlw 0x2A ; CTRL_REG1 | |
| 763 rcall I2C_TX | |
| 764 ; movlw b'00110001' ; CTRL_REG1: 160ms data rate, Active Mode | |
| 765 movlw b'00110101' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode, Active Mode | |
| 766 rcall I2C_TX | |
| 767 bsf SSP1CON2,PEN ; Stop condition | |
| 768 bra WaitMSSP ; (And return) | |
| 769 | |
| 560 | 770 I2C_init_accelerometer2: |
| 582 | 771 bsf SSP1CON2,SEN ; Start condition |
| 772 rcall WaitMSSP | |
| 773 movlw 0x32 ; address | |
| 774 rcall I2C_TX | |
| 775 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 776 rcall I2C_TX | |
| 777 movlw b'00000000' ; TEMP_CFG_REG_A (Temp sensor off) | |
| 778 rcall I2C_TX | |
| 779 movlw b'01010111' ; CTRL_REG1_A (100Hz, x,y,z = ON) | |
| 780 rcall I2C_TX | |
| 781 movlw b'00000000' ; CTRL_REG2_A | |
| 782 rcall I2C_TX | |
| 783 ; movlw b'00000000' ; CTRL_REG3_A | |
| 784 ; rcall I2C_TX | |
| 785 ; movlw b'00000000' ; CTRL_REG4_A (BDU=0, +/-2g, | |
| 786 ; rcall I2C_TX | |
| 787 ; movlw b'00000000' ; CTRL_REG5_A | |
| 788 ; rcall I2C_TX | |
| 789 bsf SSP1CON2,PEN ; Stop condition | |
| 790 bra WaitMSSP ; (And return) | |
| 0 | 791 |
| 582 | 792 global I2C_sleep_accelerometer |
| 0 | 793 I2C_sleep_accelerometer: |
| 582 | 794 btfsc compass_type2 ; Compass2 |
| 795 bra I2C_sleep_accelerometer2 ; Yes | |
| 796 btfsc compass_type ; compass1? | |
| 797 return ; yes, ignore | |
| 427 | 798 |
| 582 | 799 bsf SSP1CON2,SEN ; Start condition |
| 800 rcall WaitMSSP | |
| 801 movlw 0x38 ; address | |
| 802 rcall I2C_TX | |
| 803 movlw 0x2A ; CTRL_REG1 | |
| 804 rcall I2C_TX | |
| 805 movlw b'00000000' ; St. By Mode | |
| 806 rcall I2C_TX | |
| 807 bsf SSP1CON2,PEN ; Stop condition | |
| 808 bra WaitMSSP ; (And return) | |
| 809 | |
|
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changeset
|
810 lt2942_init_again: |
| 582 | 811 clrf i2c_temp1 |
| 812 movlw 0x02 ; Point to accumulated charge registers | |
|
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813 rcall I2C_TX_GAUGE |
| 582 | 814 movff battery_acumulated_charge+1,SSP1BUF ; Data Byte |
|
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815 rcall WaitMSSP |
|
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816 rcall I2C_WaitforACK |
| 582 | 817 movff battery_acumulated_charge+0,SSP1BUF ; Data Byte |
|
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818 rcall WaitMSSP |
|
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819 rcall I2C_WaitforACK |
| 582 | 820 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 821 rcall WaitMSSP |
|
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822 movff battery_acumulated_charge+1,sub_a+1 |
|
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823 movff battery_acumulated_charge+0,sub_a+0 |
|
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|
824 ; and init again... |
| 560 | 825 |
| 582 | 826 global lt2942_init |
| 827 lt2942_init: ; Setup Control register B | |
| 828 clrf i2c_temp1 | |
| 829 movlw 0x01 ; Point to control reg B | |
| 467 | 830 rcall I2C_TX_GAUGE |
| 582 | 831 movlw b'11111000' ; Automatic conversion every two seconds |
| 832 movff WREG, SSP1BUF ; Data Byte | |
| 113 | 833 rcall WaitMSSP |
| 834 rcall I2C_WaitforACK | |
| 582 | 835 bsf SSP1CON2,PEN ; Stop condition |
| 836 bra WaitMSSP ; (And return) | |
| 113 | 837 |
| 838 global lt2942_get_status | |
| 582 | 839 lt2942_get_status: ; Read status register |
| 840 bcf battery_gauge_available ; Clear flag | |
| 841 clrf i2c_temp1 | |
| 842 movlw 0x00 ; Point to Status reg | |
| 467 | 843 rcall I2C_TX_GAUGE |
| 844 rcall I2C_RX_GAUGE | |
| 113 | 845 movff SSP1BUF,WREG |
| 582 | 846 btfss WREG,7 ; 2942 found? |
| 847 bsf battery_gauge_available ; Yes, set flag | |
| 848 bsf SSP1CON2,PEN ; Stop condition | |
| 849 bra WaitMSSP ; (And return) | |
| 113 | 850 |
| 851 | |
| 852 global lt2942_get_voltage | |
| 582 | 853 lt2942_get_voltage: ; Read battery voltage registers |
| 854 clrf i2c_temp1 | |
| 855 movlw 0x08 ; Point to voltage registers | |
| 448 | 856 rcall I2C_TX_GAUGE |
| 857 rcall I2C_RX_GAUGE | |
| 582 | 858 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 113 | 859 rcall WaitMSSP |
| 860 movff SSP1BUF,xA+1 | |
| 582 | 861 bsf SSP1CON2, RCEN ; Enable receive mode |
| 113 | 862 rcall WaitMSSP |
| 863 movff SSP1BUF,xA+0 | |
| 582 | 864 bsf SSP1CON2,PEN ; Stop condition |
| 113 | 865 rcall WaitMSSP |
| 866 | |
| 867 ; banksel common | |
| 582 | 868 ; xA:2 loaded with raw values |
| 869 movlw LOW .6000 | |
| 870 movwf xB+0 | |
| 871 movlw HIGH .6000 | |
| 872 movwf xB+1 | |
| 873 call mult16x16 ; xA*xB=xC | |
| 113 | 874 |
| 618 | 875 ; xC+3:xC+2 -> Result in mV |
| 113 | 876 |
| 582 | 877 ; Update battery voltage in mV |
| 618 | 878 movff xC+3,batt_voltage+1 |
| 879 movff xC+2,batt_voltage+0 | |
| 466 | 880 |
| 582 | 881 tstfsz batt_voltage+1 ; <256mV? |
| 882 return ; No, done. | |
| 883 bra lt2942_init ;(and return) | |
| 113 | 884 |
| 615 | 885 global lt2942_get_temperature |
| 886 lt2942_get_temperature: ; Read temperature registers | |
| 887 clrf i2c_temp1 | |
| 888 movlw 0x0C ; Point to temperature registers | |
| 889 call I2C_TX_GAUGE | |
| 890 call I2C_RX_GAUGE | |
| 891 bsf SSP1CON2,ACKEN ; Master acknowlegde | |
| 892 rcall WaitMSSP | |
| 893 movff SSP1BUF,xA+1 | |
| 894 bsf SSP1CON2, RCEN ; Enable recieve mode | |
| 895 rcall WaitMSSP | |
| 896 movff SSP1BUF,xA+0 | |
| 897 bsf SSP1CON2,PEN ; Stop condition | |
| 898 rcall WaitMSSP | |
| 899 | |
| 900 ; banksel common | |
| 901 ; xA:2 loaded with raw values | |
| 902 movlw LOW .6000 | |
| 903 movwf xB+0 | |
| 904 movlw HIGH .6000 | |
| 905 movwf xB+1 | |
| 906 call mult16x16 ;xA*xB=xC | |
| 907 | |
| 618 | 908 ; xC+3:xC+2 -> Result in 0.1K |
| 615 | 909 |
| 616 | 910 movlw LOW max_allowed_battery_temp ; in 0.1K |
| 615 | 911 movwf sub_a+0 |
| 912 movlw HIGH max_allowed_battery_temp | |
| 913 movwf sub_a+1 | |
| 618 | 914 movff xC+3,sub_b+1 |
| 915 movff xC+2,sub_b+0 | |
| 615 | 916 call subU16 ; sub_c = sub_a - sub_b (with UNSIGNED values) |
| 917 btfss neg_flag | |
| 918 return ; temp ok, return | |
| 919 ; too hot, disable charge if currently charging | |
| 920 btfss cc_active | |
| 921 return ; Not charging, return | |
| 922 ; charging: Disable now | |
| 923 bsf charge_disable | |
| 924 bcf TRISE,2 | |
| 925 bsf battery_overtemp ; =1: The battery was charged and temp was too high (Only cleared on POR) | |
| 926 return | |
| 113 | 927 |
| 928 global lt2942_get_accumulated_charge | |
| 582 | 929 lt2942_get_accumulated_charge: ; Read accumulated charge and compute percent |
| 930 clrf i2c_temp1 | |
| 931 movlw 0x00 ; Point to status register | |
| 467 | 932 rcall I2C_TX_GAUGE |
| 933 rcall I2C_RX_GAUGE | |
| 582 | 934 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 113 | 935 rcall WaitMSSP |
| 466 | 936 movff SSP1BUF,gauge_status_byte |
| 937 | |
| 582 | 938 bsf SSP1CON2, RCEN ; Enable receive mode |
| 939 rcall WaitMSSP ; Dummy read (Control byte) | |
| 467 | 940 movf SSP1BUF,W |
| 582 | 941 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 467 | 942 rcall WaitMSSP |
| 582 | 943 |
| 944 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 113 | 945 rcall WaitMSSP |
| 466 | 946 movff SSP1BUF,sub_a+1 |
| 582 | 947 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 467 | 948 rcall WaitMSSP |
| 582 | 949 |
| 950 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 466 | 951 rcall WaitMSSP |
| 952 movff SSP1BUF,sub_a+0 | |
| 582 | 953 bsf SSP1CON2,PEN ; Stop condition |
| 113 | 954 rcall WaitMSSP |
| 582 | 955 |
| 956 movff gauge_status_byte,sub_b+0 ; copy into bank common | |
| 957 btfsc sub_b+0,0 ; =1: UVLO Event | |
|
556
dd28d4efd4d2
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parents:
498
diff
changeset
|
958 rcall lt2942_init_again |
| 113 | 959 |
| 582 | 960 movff sub_a+1,battery_acumulated_charge+1 ; Save raw value |
| 961 movff sub_a+0,battery_acumulated_charge+0 ; Save raw value | |
| 962 | |
| 963 ; Compute batt_percent | |
| 964 ; (charge-battery_offset)/365 | |
| 965 movff battery_offset+0,sub_b+0 | |
| 966 movff battery_offset+1,sub_b+1 | |
| 967 call subU16 ; sub_c = sub_a - sub_b (with signed values) | |
| 113 | 968 |
| 582 | 969 clrf batt_percent ; Set to zero |
| 970 btfsc neg_flag ; result negative? | |
| 971 bra lt2942_set_to_zero_percent ; Yes, keep LT2942 at zero percent and return | |
| 113 | 972 |
| 582 | 973 ; > Zero, set batt_percent properly |
| 974 movff sub_c+0,xA+0 | |
| 975 movff sub_c+1,xA+1 | |
| 976 movff battery_capacity+0,xB+0 | |
| 977 movff battery_capacity+1,xB+1 | |
| 604 | 978 call div16x16 ; xC = xA / xB with xA as remainder |
| 582 | 979 movff xC+0,batt_percent |
| 980 return | |
| 113 | 981 |
| 449 | 982 lt2942_set_to_zero_percent: |
| 582 | 983 clrf i2c_temp1 |
| 984 movlw 0x02 ; Point to accumulated charge registers | |
| 449 | 985 rcall I2C_TX_GAUGE |
| 986 movff battery_offset+1,SSP1BUF | |
| 987 rcall WaitMSSP | |
| 988 rcall I2C_WaitforACK | |
| 989 movff battery_offset+0,SSP1BUF | |
| 990 rcall WaitMSSP | |
| 991 rcall I2C_WaitforACK | |
| 582 | 992 bsf SSP1CON2,PEN ; Stop condition |
| 993 bra WaitMSSP ; (and return) | |
| 449 | 994 |
| 113 | 995 global lt2942_charge_done |
| 582 | 996 lt2942_charge_done: ; Reset accumulating registers to 0xFFFF |
| 997 clrf i2c_temp1 | |
| 998 movlw 0x02 ; Point to accumulated charge registers | |
| 448 | 999 rcall I2C_TX_GAUGE |
| 582 | 1000 setf SSP1BUF ; Data Byte |
| 113 | 1001 rcall WaitMSSP |
| 1002 rcall I2C_WaitforACK | |
| 582 | 1003 setf SSP1BUF ; Data Byte |
| 113 | 1004 rcall WaitMSSP |
| 1005 rcall I2C_WaitforACK | |
| 582 | 1006 bsf SSP1CON2,PEN ; Stop condition |
| 1007 bra WaitMSSP ; (and return) | |
| 113 | 1008 |
| 582 | 1009 I2C_TX_GAUGE: ; Sends a byte to the LT2942 Gauge IC |
| 1010 movwf i2c_temp2 ; Data byte | |
| 1011 bsf SSP1CON2,SEN ; Start condition | |
| 113 | 1012 rcall WaitMSSP |
| 582 | 1013 movlw b'11001000' ; Address byte + Write bit |
| 1014 movwf SSP1BUF ; control byte | |
| 113 | 1015 rcall WaitMSSP |
| 1016 rcall I2C_WaitforACK | |
| 582 | 1017 movf i2c_temp2,W |
| 1018 bra I2C_TX ; (and return) | |
| 1019 | |
| 113 | 1020 I2C_RX_GAUGE: |
| 582 | 1021 bsf SSP1CON2,SEN ; Start condition |
| 113 | 1022 rcall WaitMSSP |
| 582 | 1023 movlw b'11001001' ; Address byte + Read bit |
| 1024 movwf SSP1BUF ; control byte | |
| 113 | 1025 rcall WaitMSSP |
| 1026 rcall I2C_WaitforACK | |
| 582 | 1027 bsf SSP1CON2, RCEN ; Enable receive mode |
| 1028 bra WaitMSSP ; (and return) | |
| 1029 | |
| 1030 | |
| 604 | 1031 ;----------------------------------------------------------------------------- |
| 1032 ; Transmitter Functions | |
| 1033 | |
| 1034 IFDEF _rx_functions | |
| 1035 | |
| 560 | 1036 global I2C_probe_OSTC_rx |
| 1037 I2C_probe_OSTC_rx: | |
| 604 | 1038 movlw .5 |
| 1039 movwf lo_temp | |
| 1040 I2C_probe_OSTC_rx_1: | |
| 582 | 1041 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1042 rcall WaitMSSP |
| 582 | 1043 movlw 0x50 ; Address byte + Write bit |
| 1044 movwf SSP1BUF ; control byte | |
| 560 | 1045 rcall WaitMSSP |
| 582 | 1046 btfss SSP1CON2,ACKSTAT ; ACK? |
| 604 | 1047 bsf ostc_rx_present ; ACK sent - OSTC_RX present! |
| 582 | 1048 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1049 rcall WaitMSSP |
| 582 | 1050 btfss ostc_rx_present ; Do we have the RX? |
| 1051 return ; No, Done. | |
| 560 | 1052 WAITMS .1 |
| 582 | 1053 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1054 rcall WaitMSSP |
| 582 | 1055 movlw 0x50 ; Address byte + Write bit |
| 1056 movwf SSP1BUF ; control byte | |
| 560 | 1057 rcall WaitMSSP |
| 1058 rcall I2C_WaitforACK | |
| 1059 movlw 0x1B | |
| 582 | 1060 movwf SSP1BUF ; Data Byte (Get firmware) |
| 560 | 1061 rcall WaitMSSP |
| 1062 rcall I2C_WaitforACK | |
| 582 | 1063 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1064 rcall WaitMSSP |
| 1065 WAITMS .1 | |
| 582 | 1066 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1067 rcall WaitMSSP |
| 582 | 1068 movlw 0x51 ; Address byte + Read bit |
| 1069 movwf SSP1BUF ; control byte | |
| 560 | 1070 rcall WaitMSSP |
| 582 | 1071 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1072 rcall WaitMSSP |
| 1073 movff SSP1BUF,rx_firmware+0 | |
| 582 | 1074 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 560 | 1075 rcall WaitMSSP |
| 582 | 1076 |
| 560 | 1077 ; last byte in read from RX circuity always with a NACK! |
| 604 | 1078 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1079 rcall WaitMSSP |
| 1080 movff SSP1BUF,rx_firmware+1 | |
| 582 | 1081 bsf SSP1CON2,ACKDT |
| 1082 bsf SSP1CON2,ACKEN ; Master NOT acknowledge | |
| 560 | 1083 rcall WaitMSSP |
| 582 | 1084 bcf SSP1CON2,ACKDT ; Reset ACKDT flag |
| 1085 bsf SSP1CON2,PEN ; Stop condition | |
| 604 | 1086 rcall WaitMSSP |
| 1087 | |
| 1088 ; test for RX part not being ready during this read | |
| 1089 movff rx_firmware+1,i2c_temp1 | |
| 1090 movlw .147 | |
| 1091 cpfseq i2c_temp1 | |
| 1092 bra I2C_probe_OSTC_rx_2 ; not equal | |
| 1093 movff rx_firmware+0,i2c_temp1 | |
| 1094 movlw .27 | |
| 1095 cpfseq i2c_temp1 | |
| 1096 bra I2C_probe_OSTC_rx_2 ; not equal | |
| 1097 bsf active_reset_ostc_rx | |
| 1098 WAITMS .5 | |
| 1099 bcf active_reset_ostc_rx | |
| 1100 WAITMS .250 | |
| 1101 WAITMS .250 | |
| 1102 clrf i2c_temp1 | |
| 1103 decfsz lo_temp,F ; try max. 5 times | |
| 1104 bra I2C_probe_OSTC_rx_1 | |
| 1105 bcf ostc_rx_present ; Clear flag. Something is wrong | |
| 1106 I2C_probe_OSTC_rx_2: | |
| 1107 clrf i2c_temp1 | |
| 1108 return | |
| 582 | 1109 |
| 560 | 1110 |
| 1111 global I2C_get_tankdata | |
| 1112 I2C_get_tankdata: | |
| 582 | 1113 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1114 rcall WaitMSSP |
| 582 | 1115 movlw 0x50 ; Address byte + Write bit |
| 1116 movwf SSP1BUF ; control byte | |
| 560 | 1117 rcall WaitMSSP |
| 1118 rcall I2C_WaitforACK | |
| 582 | 1119 movlw 0x1E ; Read buffer2 (48 Bytes) |
| 560 | 1120 movwf SSP1BUF ; Data Byte |
| 1121 rcall WaitMSSP | |
| 1122 rcall I2C_WaitforACK | |
| 582 | 1123 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1124 rcall WaitMSSP |
| 1125 WAITMS .1 | |
| 1126 | |
| 1127 ; read 48 bytes | |
| 582 | 1128 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1129 rcall WaitMSSP |
| 582 | 1130 movlw 0x51 ; Address byte + read bit |
| 1131 movwf SSP1BUF ; control byte | |
| 560 | 1132 rcall WaitMSSP |
| 1133 rcall I2C_WaitforACK | |
| 582 | 1134 movlw .47 ; 47 with ACK + 1 w/o ACK |
| 1135 movwf i2c_temp2 | |
| 560 | 1136 lfsr FSR2,rx_buffer+0 |
| 1137 I2C_get_tankdata_loop_read: | |
| 582 | 1138 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1139 rcall WaitMSSP |
| 1140 movff SSP1BUF,POSTINC2 | |
| 582 | 1141 bcf SSP1CON2,ACKDT |
| 1142 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 560 | 1143 rcall WaitMSSP |
| 582 | 1144 decfsz i2c_temp2,F |
| 1145 bra I2C_get_tankdata_loop_read | |
| 560 | 1146 |
| 1147 ; 1 w/o ACK | |
| 582 | 1148 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1149 rcall WaitMSSP |
| 1150 movff SSP1BUF,POSTINC2 | |
| 582 | 1151 bsf SSP1CON2,ACKDT |
| 1152 bsf SSP1CON2,ACKEN ; Master NOT acknowledge | |
| 560 | 1153 rcall WaitMSSP |
| 582 | 1154 bcf SSP1CON2,ACKDT ; Reset ACKDT flag |
| 1155 | |
| 1156 bsf SSP1CON2,PEN ; Stop condition | |
| 1157 bra WaitMSSP ;(and return) | |
| 1158 | |
| 1159 | |
| 560 | 1160 global I2C_update_OSTC_rx |
| 582 | 1161 I2C_update_OSTC_rx: ; 992*64byte master loop |
| 1162 bcf i2c_error_flag ; clear error flag | |
| 560 | 1163 ; write 64 bytes |
| 582 | 1164 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1165 rcall WaitMSSP |
| 582 | 1166 movlw 0x50 ; Address byte + Write bit |
| 1167 movwf SSP1BUF ; control byte | |
| 560 | 1168 rcall WaitMSSP |
| 1169 rcall I2C_WaitforACK | |
| 582 | 1170 lfsr FSR2,buffer ; send buffer for verify |
| 560 | 1171 movlw .64 |
| 582 | 1172 movwf i2c_temp2 |
| 1173 I2C_update_OSTC_loop: ; 64byte flash page loop | |
| 1174 movff up,POSTINC2 ; store for verify | |
| 560 | 1175 movff up,SSP1BUF |
| 1176 rcall WaitMSSP | |
| 1177 rcall I2C_WaitforACK | |
| 1178 call ext_flash_read_block ; Read one byte | |
| 582 | 1179 movwf up ; prepare for transmit |
| 1180 decfsz i2c_temp2,F | |
| 1181 bra I2C_update_OSTC_loop | |
| 1182 bsf SSP1CON2,PEN ; Stop condition | |
| 560 | 1183 rcall WaitMSSP |
| 1184 WAITMS .1 | |
| 1185 | |
| 1186 ; read 64 bytes | |
| 582 | 1187 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1188 rcall WaitMSSP |
| 582 | 1189 movlw 0x51 ; Address byte + read bit |
| 1190 movwf SSP1BUF ; control byte | |
| 560 | 1191 rcall WaitMSSP |
| 1192 rcall I2C_WaitforACK | |
| 582 | 1193 lfsr FSR2,buffer ; send buffer for verify |
| 1194 movlw .63 ; 63 with ACK + 1 w/o ACK | |
| 1195 movwf i2c_temp2 | |
| 560 | 1196 I2C_update_OSTC_loop_read: |
| 582 | 1197 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1198 rcall WaitMSSP |
| 1199 movf SSP1BUF,W | |
| 582 | 1200 cpfseq POSTINC2 ; compare read-back with original |
| 1201 bsf i2c_error_flag ; Not equal, set flag | |
| 1202 bcf SSP1CON2,ACKDT | |
| 1203 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 560 | 1204 rcall WaitMSSP |
| 582 | 1205 decfsz i2c_temp2,F |
| 1206 bra I2C_update_OSTC_loop_read | |
| 560 | 1207 |
| 1208 ; 1 w/o ACK | |
| 582 | 1209 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1210 rcall WaitMSSP |
| 1211 movf SSP1BUF,W | |
| 582 | 1212 cpfseq POSTINC2 ; compare read-back with original |
| 1213 bsf i2c_error_flag ; Not equal, set flag | |
| 1214 bsf SSP1CON2,ACKDT | |
| 1215 bsf SSP1CON2,ACKEN ; Master NOT acknowledge | |
| 560 | 1216 rcall WaitMSSP |
| 582 | 1217 bcf SSP1CON2,ACKDT ; Reset ACKDT flag |
| 1218 | |
| 1219 bsf SSP1CON2,PEN ; Stop condition | |
| 560 | 1220 rcall WaitMSSP |
| 1221 WAITMS .1 | |
| 582 | 1222 |
| 1223 bsf SSP1CON2,SEN ; Start condition | |
| 560 | 1224 rcall WaitMSSP |
| 582 | 1225 movlw 0x50 ; Address byte + Write bit |
| 1226 movwf SSP1BUF ; control byte | |
| 560 | 1227 rcall WaitMSSP |
| 1228 rcall I2C_WaitforACK | |
| 582 | 1229 movlw 0x1F ; Write command! |
| 1230 movwf SSP1BUF ; Data Byte | |
| 560 | 1231 rcall WaitMSSP |
| 1232 rcall I2C_WaitforACK | |
| 582 | 1233 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1234 rcall WaitMSSP |
| 582 | 1235 WAITMS .5 ; Required waiting time |
| 1236 | |
| 560 | 1237 btfss i2c_error_flag |
| 582 | 1238 retlw .0 ; All ok |
| 1239 retlw .255 ; an error occurred | |
| 1240 | |
| 604 | 1241 ENDIF |
| 1242 | |
| 582 | 1243 END |