Mercurial > public > hwos_code
annotate src/i2c.asm @ 586:06642f6ffe59
2.97 release
| author | heinrichsweikamp |
|---|---|
| date | Thu, 01 Mar 2018 11:12:47 +0100 |
| parents | b455b31ce022 |
| children | ca4556fb60b9 |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 582 | 3 ; File i2c.asm V2.98 |
| 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 WaitMSSP: | |
| 582 | 52 decfsz i2c_temp1,F ; check for timeout during I2C action |
| 560 | 53 bra WaitMSSP2 |
| 582 | 54 bra I2CFail ; timeout occurred |
| 0 | 55 WaitMSSP2: |
| 582 | 56 btfss PIR1,SSP1IF |
| 560 | 57 bra WaitMSSP |
| 582 | 58 clrf i2c_temp1 |
| 560 | 59 bcf PIR1,SSP1IF |
| 0 | 60 return |
| 61 | |
| 62 I2C_WaitforACK: | |
| 582 | 63 btfss SSP1CON2,ACKSTAT ; checks for ACK bit from slave |
| 560 | 64 return |
| 0 | 65 I2CFail: |
| 582 | 66 rcall I2CReset ; I2C Reset |
| 560 | 67 bcf PIR1,SSP1IF |
| 582 | 68 clrf i2c_temp1 |
| 69 bsf i2c_error_flag ; set error flag | |
| 0 | 70 return |
| 71 | |
| 582 | 72 I2CReset: ; Something went wrong (Slave holds SDA low?) |
| 73 clrf SSP1CON1 ; wake-up slave and reset entire module | |
| 74 clrf SSP1CON2 | |
| 75 clrf SSP1STAT | |
| 76 bcf TRISC,3 ; SCL OUTPUT | |
| 77 bsf TRISC,4 ; SDA Input | |
| 78 bcf PORTC,3 | |
| 79 movlw d'9' | |
| 80 movwf i2c_temp1 ; clock-out 9 clock cycles manually | |
| 0 | 81 I2CReset_1: |
| 582 | 82 bsf PORTC,3 ; SCL=1 |
| 0 | 83 nop |
| 84 nop | |
| 85 nop | |
| 86 nop | |
| 582 | 87 btfsc PORTC,4 ; SDA=1? |
| 88 bra I2CReset_2 ; =1, SDA has been released from slave | |
| 89 bcf PORTC,3 ; SCL=0 | |
| 0 | 90 nop |
| 91 nop | |
| 582 | 92 bcf PORTC,3 |
| 0 | 93 nop |
| 94 nop | |
| 582 | 95 decfsz i2c_temp1,F |
| 96 bra I2CReset_1 ; check for nine clock cycles | |
| 0 | 97 I2CReset_2: |
| 582 | 98 bsf TRISC,3 ; SCL Input |
| 99 clrf SSP1CON1 ; setup I²C Mode | |
| 100 WAITMS d'10' ; Reset-Timeout for I2C devices | |
| 101 movlw b'00000000' ; with slew rate control | |
| 102 movwf SSP1STAT | |
| 103 movlw b'00101000' | |
| 104 movwf SSP1CON1 | |
| 105 movlw b'00000000' | |
| 106 movwf SSP1CON2 | |
| 107 movlw 0x27 | |
| 108 movwf SSP1ADD | |
| 0 | 109 return |
| 110 | |
| 111 I2C_TX: | |
| 582 | 112 movwf SSP1BUF |
| 113 rcall WaitMSSP | |
| 114 bra I2C_WaitforACK ; Returns... | |
| 0 | 115 |
| 582 | 116 I2C_TwoBytesRX_div16: ; Get two bytes and divide lo:hi/16 (signed) |
| 117 rcall I2C_OneByteRX ; Get one byte | |
| 118 movff SSP1BUF,hi ; Data Byte | |
| 119 rcall I2C_OneByteRX ; Get one byte | |
| 120 movff SSP1BUF,lo ; Data Byte | |
| 121 I2C_TwoBytesRX_div16_2: ; divide lo:hi/16 (signed) only | |
| 122 bcf STATUS,C | |
| 123 btfsc hi,7 ; Copy sign bit to carry | |
| 124 bsf STATUS,C | |
| 125 rrcf hi ; /2 | |
| 126 rrcf lo | |
| 127 I2C_TwoBytesRX_div8_2: ; divide lo:hi/8 (signed) only | |
| 128 bcf STATUS,C | |
| 129 btfsc hi,7 ; Copy sign bit to carry | |
| 130 bsf STATUS,C | |
| 131 rrcf hi ; /4 | |
| 132 rrcf lo | |
| 133 bcf STATUS,C | |
| 134 btfsc hi,7 ; Copy sign bit to carry | |
| 135 bsf STATUS,C | |
| 136 rrcf hi ; /8 | |
| 137 rrcf lo | |
| 138 bcf STATUS,C | |
| 139 btfsc hi,7 ; Copy sign bit to carry | |
| 140 bsf STATUS,C | |
| 141 rrcf hi ; /16 | |
| 142 rrcf lo | |
| 143 return | |
| 0 | 144 |
| 582 | 145 global I2C_RX_accelerometer |
| 0 | 146 I2C_RX_accelerometer: |
| 582 | 147 btfsc compass_type2 ; compass2 |
| 148 bra I2C_RX_accelerometer_compass2 ; yes | |
| 149 btfsc compass_type ; compass1? | |
| 150 bra I2C_RX_accelerometer_compass1 ; yes | |
| 560 | 151 I2C_RX_accelerometer_compass0: |
| 582 | 152 bsf SSP1CON2,SEN ; Start condition |
| 153 rcall WaitMSSP | |
| 154 movlw 0x38 ; address | |
| 155 rcall I2C_TX | |
| 156 movlw 0x00 | |
| 157 rcall I2C_TX | |
| 158 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 159 rcall WaitMSSP | |
| 160 movlw 0x39 ; address | |
| 161 rcall I2C_TX | |
| 0 | 162 |
| 582 | 163 rcall I2C_OneByteRX ; Get Status Byte |
| 164 movf SSP1BUF,W | |
| 158 | 165 |
| 582 | 166 ; Non-flipped screen: |
| 167 ; Chip orientation on the PCB requires | |
| 168 ; Original = Corrected | |
| 169 ; x = -x | |
| 170 ; y = -y | |
| 171 ; z = -z | |
| 0 | 172 |
| 582 | 173 ; Flipped screen: |
| 174 ; Chip orientation on the PCB requires | |
| 175 ; Original = Corrected | |
| 176 ; x = x | |
| 177 ; y = y | |
| 178 ; z = -z | |
|
166
30ebaf72170d
BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents:
158
diff
changeset
|
179 |
| 582 | 180 rcall I2C_TwoBytesRX_div16 ; Get two bytes and divide /16 (signed) |
| 181 btfsc flip_screen ; 180° rotation ? | |
| 182 bra I2C_RX_accelerometer2 ; Yes | |
| 183 comf hi ; 16bit sign change. | |
| 184 negf lo | |
| 185 btfsc STATUS,C ; Carry to propagate ? | |
| 186 incf hi,F ; YES: do it. | |
|
166
30ebaf72170d
BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents:
158
diff
changeset
|
187 I2C_RX_accelerometer2: |
| 582 | 188 movff lo,accel_DX+0 |
| 189 movff hi,accel_DX+1 ; Copy result | |
| 0 | 190 |
| 582 | 191 rcall I2C_TwoBytesRX_div16 ; Get two bytes and divide /16 (signed) |
| 192 btfsc flip_screen ; 180° rotation ? | |
| 193 bra I2C_RX_accelerometer3 ; Yes | |
| 194 comf hi ; 16bit sign change. | |
| 195 negf lo | |
| 196 btfsc STATUS,C ; Carry to propagate ? | |
| 197 incf hi,F ; YES: do it. | |
|
166
30ebaf72170d
BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents:
158
diff
changeset
|
198 I2C_RX_accelerometer3: |
| 582 | 199 movff lo,accel_DY+0 |
| 200 movff hi,accel_DY+1 ; Copy result | |
| 0 | 201 |
| 582 | 202 rcall I2C_OneByteRX ; Get one byte |
| 203 movff SSP1BUF,hi ; Data Byte | |
| 204 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 205 rcall WaitMSSP | |
| 206 ; According to data sheet there should be no Master Acknowledge for the last Byte (accel_DZ+0)... | |
| 207 movff SSP1BUF,lo ; Data Byte | |
| 0 | 208 |
| 582 | 209 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only |
| 210 comf hi ; 16bit sign change. | |
| 211 negf lo | |
| 212 btfsc STATUS,C ; Carry to propagate ? | |
| 213 incf hi,F ; YES: do it. | |
| 214 movff lo,accel_DZ+0 | |
| 215 movff hi,accel_DZ+1 ; Copy result | |
| 0 | 216 |
| 582 | 217 bsf SSP1CON2,PEN ; Stop condition |
| 218 bra WaitMSSP ; (And return) | |
| 0 | 219 |
| 427 | 220 I2C_RX_accelerometer_compass1: |
| 582 | 221 bsf SSP1CON2,SEN ; Start condition |
| 222 rcall WaitMSSP | |
| 223 movlw 0x3C ; address | |
| 224 rcall I2C_TX | |
| 225 movlw b'10101000' ; 0x28 with auto-increment (MSB=1) | |
| 226 rcall I2C_TX | |
| 227 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 228 rcall WaitMSSP | |
| 229 movlw 0x3D ; address | |
| 230 I2C_RX_accelerometer_compass1_xx: ; compass2 continues here... | |
| 231 rcall I2C_TX | |
| 232 | |
| 233 ; Non-flipped screen: | |
| 234 ; Chip orientation on the PCB requires | |
| 235 ; Original = Corrected | |
| 236 ; x = -x (Compass 1) | |
| 237 ; x = x (Compass 2) | |
| 238 ; y = -y | |
| 239 ; z = -z | |
| 240 | |
| 241 ; Flipped screen: | |
| 242 ; Chip orientation on the PCB requires | |
| 243 ; Original = Corrected | |
| 244 ; x = x (Compass 1) | |
| 245 ; x = -x (Compass 2) | |
| 246 ; y = y | |
| 247 ; z = -z | |
| 427 | 248 |
| 582 | 249 ; Dump the accelerator data |
| 250 rcall I2C_OneByteRX | |
| 251 movff SSP1BUF,lo ; accel_DX+0 | |
| 252 rcall I2C_OneByteRX | |
| 253 movff SSP1BUF,hi ;accel_DX+1 | |
| 254 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 255 btfss compass_type2 ; compass 2? | |
| 256 bra I2C_RX_accelerometer1_c1 ; No, compass 1 | |
| 257 ; compass 2 | |
| 258 btfss flip_screen ; 180° rotation ? | |
| 259 bra I2C_RX_accelerometer2_c1 ; No, continue with normal compass1 routines for Y and Z | |
| 260 ; flipped compass 2, negate x | |
| 261 comf hi ; 16bit sign change. | |
| 262 negf lo | |
| 263 btfsc STATUS,C ; Carry to propagate ? | |
| 264 incf hi,F ; YES: do it. | |
| 265 bra I2C_RX_accelerometer2_c1 ; continue with normal compass1 routines for Y and Z | |
| 266 | |
| 267 I2C_RX_accelerometer1_c1: | |
| 268 btfsc flip_screen ; 180° rotation ? | |
| 269 bra I2C_RX_accelerometer2_c1 ; Yes | |
| 270 ; non-flipped compass 1, negate x | |
| 271 comf hi ; 16bit sign change. | |
| 272 negf lo | |
| 273 btfsc STATUS,C ; Carry to propagate ? | |
| 274 incf hi,F ; YES: do it. | |
| 427 | 275 I2C_RX_accelerometer2_c1: |
| 582 | 276 ; flipped compass 1, non-flipped compass 2 |
| 277 movff lo,accel_DX+0 | |
| 278 movff hi,accel_DX+1 ; Copy result | |
| 279 rcall I2C_OneByteRX | |
| 280 movff SSP1BUF,lo ; accel_DY+0 | |
| 281 rcall I2C_OneByteRX | |
| 282 movff SSP1BUF,hi ; accel_DY+1 | |
| 283 | |
| 284 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 285 btfsc flip_screen ; 180° rotation ? | |
| 286 bra I2C_RX_accelerometer3_c1 ; Yes | |
| 287 comf hi ; 16bit sign change. | |
| 288 negf lo | |
| 289 btfsc STATUS,C ; Carry to propagate ? | |
| 290 incf hi,F ; YES: do it. | |
| 427 | 291 I2C_RX_accelerometer3_c1: |
| 582 | 292 movff lo,accel_DY+0 |
| 293 movff hi,accel_DY+1 ; Copy result | |
| 427 | 294 |
| 582 | 295 rcall I2C_OneByteRX |
| 296 movff SSP1BUF,lo ;accel_DZ+0 | |
| 297 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 298 rcall WaitMSSP | |
| 299 ; According to data sheet there should be no Master Acknowledge for the last Byte (accel_DZ+1)... | |
| 300 movff SSP1BUF,hi ;accel_DZ+1 | |
| 301 bsf SSP1CON2,PEN ; Stop condition | |
| 302 rcall WaitMSSP | |
| 303 rcall I2C_TwoBytesRX_div16_2 ; divide lo:hi/16 (signed) only | |
| 304 comf hi ; 16bit sign change for Z | |
| 305 negf lo | |
| 306 btfsc STATUS,C ; Carry to propagate ? | |
| 307 incf hi,F ; YES: do it. | |
| 308 movff lo,accel_DZ+0 | |
| 309 movff hi,accel_DZ+1 ; Copy result | |
| 310 return | |
| 311 | |
| 560 | 312 I2C_RX_accelerometer_compass2: |
| 582 | 313 bsf SSP1CON2,SEN ; Start condition |
| 314 rcall WaitMSSP | |
| 315 movlw 0x32 ; address | |
| 316 rcall I2C_TX | |
| 317 movlw b'10101000' ; 0x28 with auto-increment (MSB=1) | |
| 318 rcall I2C_TX | |
| 319 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 320 rcall WaitMSSP | |
| 321 movlw 0x33 ; address | |
| 322 bra I2C_RX_accelerometer_compass1_xx | |
| 323 | |
| 0 | 324 I2C_OneByteRX: |
| 582 | 325 bsf SSP1CON2,RCEN ; Enable receive mode |
| 326 rcall WaitMSSP | |
| 327 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 328 bra WaitMSSP ; And return! | |
| 0 | 329 |
| 582 | 330 global I2C_RX_compass |
| 0 | 331 I2C_RX_compass: |
| 582 | 332 btfsc compass_type2 ; compass2 |
| 333 bra I2C_RX_compass2 ; yes | |
| 334 btfsc compass_type ; compass1? | |
| 335 bra I2C_RX_compass1 ; yes | |
| 560 | 336 I2C_RX_compass0: |
| 582 | 337 bsf SSP1CON2,SEN ; Start condition |
| 338 rcall WaitMSSP | |
| 339 movlw 0x3C ; address | |
| 340 rcall I2C_TX | |
| 341 movlw 0x03 | |
| 342 rcall I2C_TX | |
| 343 bsf SSP1CON2,PEN ; Stop condition | |
| 344 rcall WaitMSSP | |
| 0 | 345 |
| 582 | 346 bcf PIR1,SSP1IF |
| 347 bsf SSP1CON2,SEN ; Start condition | |
| 348 rcall WaitMSSP | |
| 349 movlw 0x3D ; address | |
| 350 rcall I2C_TX | |
| 0 | 351 |
| 582 | 352 ; Compass IC sends data in following order: |
| 353 ; x MSB | |
| 354 ; x LSB | |
| 355 ; z MSB | |
| 356 ; z LSB | |
| 357 ; y MSB | |
| 358 ; y LSB | |
| 0 | 359 |
| 582 | 360 ; Non-flipped screen |
| 361 ; Chip orientation on the PCB requires | |
| 362 ; Original = Corrected | |
| 363 ; x = -y | |
| 364 ; z = z | |
| 365 ; y = x | |
| 0 | 366 |
| 582 | 367 ; Flipped screen |
| 368 ; Chip orientation on the PCB requires | |
| 369 ; Original = Corrected | |
| 370 ; x = y | |
| 371 ; z = z | |
| 372 ; y = -x | |
|
166
30ebaf72170d
BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents:
158
diff
changeset
|
373 |
| 582 | 374 rcall I2C_OneByteRX ; Get one byte |
| 375 movff SSP1BUF,compass_DY+1 ; Data Byte | |
| 376 rcall I2C_OneByteRX ; Get one byte | |
| 377 movff SSP1BUF,compass_DY+0 ; Data Byte | |
| 378 btfsc flip_screen ; 180° rotation ? | |
| 379 bra I2C_RX_compass0_2 ; Yes | |
| 380 banksel compass_DY | |
| 381 comf compass_DY+1 ; 16bit sign change. | |
| 382 negf compass_DY+0 | |
| 383 btfsc STATUS,C ; Carry to propagate ? | |
| 384 incf compass_DY+1,F ; YES: do it. | |
| 560 | 385 I2C_RX_compass0_2: |
| 582 | 386 banksel common |
| 387 rcall I2C_OneByteRX ; Get one byte | |
| 388 movff SSP1BUF,compass_DZ+1 ; Data Byte | |
| 389 rcall I2C_OneByteRX ; Get one byte | |
| 390 movff SSP1BUF,compass_DZ+0 ; Data Byte | |
| 391 rcall I2C_OneByteRX ; Get one byte | |
| 392 movff SSP1BUF,compass_DX+1 ; Data Byte | |
| 393 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 394 rcall WaitMSSP | |
| 395 movff SSP1BUF,compass_DX+0 ; Data Byte | |
| 396 bsf SSP1CON2,PEN ; Stop condition | |
| 397 rcall WaitMSSP | |
| 398 btfss flip_screen ; 180° rotation ? | |
| 399 return ; No, done. | |
| 400 ; Yes, flip X | |
| 401 banksel compass_DX | |
| 402 comf compass_DX+1 ; 16bit sign change. | |
| 403 negf compass_DX+0 | |
| 404 btfsc STATUS,C ; Carry to propagate ? | |
| 405 incf compass_DX+1,F ; YES: do it. | |
| 406 banksel common | |
| 407 return | |
| 408 | |
| 409 I2C_RX_compass1: ; New compass | |
| 410 bsf SSP1CON2,SEN ; Start condition | |
| 411 rcall WaitMSSP | |
| 412 movlw 0x3C ; address | |
| 413 rcall I2C_TX | |
| 414 movlw b'10001000' ; 0x08 with auto-increment (MSB=1) | |
| 415 rcall I2C_TX | |
| 416 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 417 rcall WaitMSSP | |
| 418 movlw 0x3D ; address | |
| 419 rcall I2C_TX | |
| 420 ;rcall WaitMSSP ; Needed? (mH) | |
| 421 rcall I2C_OneByteRX ; Get one byte | |
| 422 movff SSP1BUF,lo ; Data Byte | |
| 423 rcall I2C_OneByteRX ; Get one byte | |
| 424 movff SSP1BUF,hi ; Data Byte | |
| 425 rcall I2C_TwoBytesRX_div8_2 | |
| 426 movff lo,compass_DX+0 | |
| 427 movff hi,compass_DX+1 | |
| 428 btfss flip_screen ; 180° rotation ? | |
| 429 bra I2C_RX_compass1_1 ; Yes | |
| 430 ; Yes, flip X | |
| 431 banksel compass_DX | |
| 432 comf compass_DX+1 ; 16bit sign change. | |
| 433 negf compass_DX+0 | |
| 434 btfsc STATUS,C ; Carry to propagate ? | |
| 435 incf compass_DX+1,F ; YES: do it. | |
| 436 banksel common | |
| 427 | 437 I2C_RX_compass1_1: |
| 582 | 438 rcall I2C_OneByteRX ; Get one byte |
| 439 movff SSP1BUF,lo ; Data Byte | |
| 440 rcall I2C_OneByteRX ; Get one byte | |
| 441 movff SSP1BUF,hi ; Data Byte | |
| 442 rcall I2C_TwoBytesRX_div8_2 | |
| 443 movff lo,compass_DY+0 | |
| 444 movff hi,compass_DY+1 | |
| 445 btfss flip_screen ; 180° rotation ? | |
| 446 bra I2C_RX_compass1_2 ; Yes | |
| 447 ; Yes, flip Y | |
| 448 banksel compass_DY | |
| 449 comf compass_DY+1 ; 16bit sign change. | |
| 450 negf compass_DY+0 | |
| 451 btfsc STATUS,C ; Carry to propagate ? | |
| 452 incf compass_DY+1,F ; YES: do it. | |
| 427 | 453 I2C_RX_compass1_2: |
| 582 | 454 banksel common |
| 455 rcall I2C_OneByteRX ; Get one byte | |
| 456 movff SSP1BUF,lo ; Data Byte | |
| 457 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 458 rcall WaitMSSP | |
| 459 movff SSP1BUF,hi ; Data Byte | |
| 460 rcall I2C_TwoBytesRX_div8_2 | |
| 461 movff lo,compass_DZ+0 | |
| 462 movff hi,compass_DZ+1 | |
| 463 bsf SSP1CON2,PEN ; Stop condition | |
| 464 bra WaitMSSP ;(And return) | |
| 560 | 465 |
| 582 | 466 I2C_RX_compass2: ; newest compass |
| 467 bsf SSP1CON2,SEN ; Start condition | |
| 468 rcall WaitMSSP | |
| 469 movlw 0x3C ; address | |
| 470 rcall I2C_TX | |
| 471 movlw 0xE8 ; 0x68 with auto-increment (MSB=1) | |
| 472 rcall I2C_TX | |
| 473 bsf SSP1CON2,RSEN ; Repeated start condition (!) | |
| 474 rcall WaitMSSP | |
| 475 movlw 0x3D ; address | |
| 476 rcall I2C_TX | |
| 477 ; rcall WaitMSSP | |
| 478 rcall I2C_OneByteRX ; Get one byte | |
| 479 movff SSP1BUF,lo ; Data Byte | |
| 480 rcall I2C_OneByteRX ; Get one byte | |
| 481 movff SSP1BUF,hi ; Data Byte | |
| 482 ; rcall I2C_TwoBytesRX_div8_2 | |
| 483 btfsc flip_screen ; 180° rotation ? | |
| 484 bra I2C_RX_compass2_1 ; Yes, do nothing with X | |
| 485 ; No, flip X | |
| 486 comf hi ; 16bit sign change. | |
| 487 negf lo | |
| 488 btfsc STATUS,C ; Carry to propagate ? | |
| 489 incf hi,F ; YES: do it. | |
| 490 I2C_RX_compass2_1: | |
| 491 movff lo,compass_DX+0 | |
| 492 movff hi,compass_DX+1 | |
| 493 rcall I2C_OneByteRX ; Get one byte | |
| 494 movff SSP1BUF,lo ; Data Byte | |
| 495 rcall I2C_OneByteRX ; Get one byte | |
| 496 movff SSP1BUF,hi ; Data Byte | |
| 497 ; rcall I2C_TwoBytesRX_div8_2 | |
| 498 btfss flip_screen ; 180° rotation ? | |
| 499 bra I2C_RX_compass2_2 ; No, do nothing with Y | |
| 500 ; Yes, flip Y | |
| 501 comf hi ; 16bit sign change. | |
| 502 negf lo | |
| 503 btfsc STATUS,C ; Carry to propagate ? | |
| 504 incf hi,F ; YES: do it. | |
| 560 | 505 I2C_RX_compass2_2: |
| 582 | 506 movff lo,compass_DY+0 |
| 507 movff hi,compass_DY+1 | |
| 508 rcall I2C_OneByteRX ; Get one byte | |
| 509 movff SSP1BUF,lo ; Data Byte | |
| 510 rcall I2C_OneByteRX ; Get one byte | |
| 511 movff SSP1BUF,hi ; Data Byte | |
| 512 ; rcall I2C_TwoBytesRX_div8_2 | |
| 513 movff lo,compass_DZ+0 | |
| 514 movff hi,compass_DZ+1 | |
| 515 bsf SSP1CON2,PEN ; Stop condition | |
| 516 bra WaitMSSP ;(And return) | |
| 517 | |
| 518 | |
| 519 global I2C_init_compass | |
| 0 | 520 I2C_init_compass: |
| 582 | 521 bsf compass_enabled |
| 522 bcf compass_type2 | |
| 523 ; probe compass 2 | |
| 524 bsf SSP1CON2,SEN ; Start condition | |
| 525 rcall WaitMSSP | |
| 526 movlw 0x32 ; Address byte + Write bit | |
| 527 movwf SSP1BUF ; control byte | |
| 528 rcall WaitMSSP | |
| 529 btfss SSP1CON2,ACKSTAT ; ACK? | |
| 530 bsf compass_type2 ; ACK send. compass2 present | |
| 531 bsf SSP1CON2,PEN ; Stop condition | |
| 532 rcall WaitMSSP | |
| 427 | 533 |
| 582 | 534 btfsc compass_type2 |
| 535 bra I2C_init_compass2 ; Compass2 | |
| 536 ; Check for compass0 or compass1... | |
| 537 bsf compass_type ; set flag | |
| 538 bsf SSP1CON2,SEN ; Start condition | |
| 539 rcall WaitMSSP | |
| 540 movlw 0x3C ; address | |
| 541 rcall I2C_TX | |
| 542 movlw 0x0F | |
| 543 rcall I2C_TX | |
| 544 bsf SSP1CON2,PEN ; Stop condition | |
| 545 rcall WaitMSSP | |
| 546 bcf PIR1,SSP1IF | |
| 547 bsf SSP1CON2,SEN ; Start condition | |
| 548 rcall WaitMSSP | |
| 549 movlw 0x3D ; address | |
| 550 rcall I2C_TX | |
| 551 rcall I2C_OneByteRX ; Get one byte | |
| 552 movlw 0x49 ; 0x49 = Compass1 | |
| 553 cpfseq SSP1BUF | |
| 554 bcf compass_type ; clear flag | |
| 555 bsf SSP1CON2,PEN ; Stop condition | |
| 556 rcall WaitMSSP | |
| 557 | |
| 558 btfsc compass_type ; compass1? | |
| 559 bra I2C_init_compass1 ; yes | |
| 427 | 560 ; init compass0 |
| 582 | 561 bsf SSP1CON2,SEN ; Start condition |
| 562 rcall WaitMSSP | |
| 563 movlw 0x3C ; address | |
| 564 rcall I2C_TX | |
| 565 movlw 0x00 | |
| 566 rcall I2C_TX | |
| 567 ; movlw b'01101001' ; ConfigA: 3Hz, 8 Samples averaged, Test Mode (Positive Bias) | |
| 568 movlw b'01101000' ; ConfigA: 3Hz, 8 Samples averaged | |
| 569 rcall I2C_TX | |
| 20 | 570 I2C_init_compass_common: |
| 582 | 571 movff opt_compass_gain,i2c_temp1 ; 0-7 (230LSB/Gauss to 1370LSB/Gauss) |
| 572 swapf i2c_temp1,F | |
| 573 comf i2c_temp1,F | |
| 574 bcf STATUS,C | |
| 575 rlcf i2c_temp1 | |
| 576 movf i2c_temp1,W | |
| 577 clrf i2c_temp1 | |
| 578 rcall I2C_TX | |
| 579 movlw b'00000000' ; Continuous Mode | |
| 580 rcall I2C_TX | |
| 581 bsf SSP1CON2,PEN ; Stop condition | |
| 582 bra WaitMSSP ; (And return) | |
| 0 | 583 |
| 427 | 584 I2C_init_compass1: |
| 582 | 585 bsf SSP1CON2,SEN ; Start condition |
| 586 rcall WaitMSSP | |
| 587 movlw 0x3C ; address | |
| 588 rcall I2C_TX | |
| 589 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 590 rcall I2C_TX | |
| 591 movlw b'00000000' ; CTRL0 | |
| 592 rcall I2C_TX | |
| 593 movlw b'00101111' ; CTRL1 (6,25Hz, BDU=0, x,y,z = ON) | |
| 594 rcall I2C_TX | |
| 595 movlw b'11000000' ; CTRL2 (50Hz, +/-2g, | |
| 596 rcall I2C_TX | |
| 597 movlw b'00000000' ; CTRL3 | |
| 598 rcall I2C_TX | |
| 599 movlw b'00000000' ; CTRL4 | |
| 600 rcall I2C_TX | |
| 601 movlw b'01100100' ; CTRL5 HIGH res, 6,25Hz | |
| 602 rcall I2C_TX | |
| 429 | 603 init_compass1_common: |
| 582 | 604 movff opt_compass_gain,i2c_temp1 ; 0-7 (230LSB/Gauss to 1370LSB/Gauss) +++ |
| 605 movlw b'01100000' ; CTRL6 Full scale (+/-12 Gauss -> 2730LSB/Gauss) | |
| 606 dcfsnz i2c_temp1,F ; = 1? | |
| 607 movlw b'01100000' ; Yes, CTRL6 Full scale (+/-12 Gauss -> 2730LSB/Gauss) | |
| 608 dcfsnz i2c_temp1,F ; = 2? | |
| 609 movlw b'01000000' ; Yes, CTRL6 (+/-8 Gauss) | |
| 610 dcfsnz i2c_temp1,F ; = 3? | |
| 611 movlw b'01000000' ; Yes, CTRL6 (+/-8 Gauss) | |
| 612 dcfsnz i2c_temp1,F ; = 4? | |
| 613 movlw b'00100000' ; Yes, CTRL6 (+/-4 Gauss) | |
| 614 dcfsnz i2c_temp1,F ; = 5? | |
| 615 movlw b'00100000' ; Yes, CTRL6 (+/-4 Gauss) | |
| 616 dcfsnz i2c_temp1,F ; = 6? | |
| 617 movlw b'00000000' ; Yes, CTRL6 (+/-2 Gauss) | |
| 618 dcfsnz i2c_temp1,F ; = 7? | |
| 619 movlw b'00000000' ; Yes, CTRL6 (+/-2 Gauss) | |
| 620 rcall I2C_TX | |
| 621 movlw b'00000000' ; CTRL7 Continuous Mode | |
| 622 rcall I2C_TX | |
| 623 bsf SSP1CON2,PEN ; Stop condition | |
| 624 bra WaitMSSP ; (And return) | |
| 625 | |
| 560 | 626 I2C_init_compass2: |
| 582 | 627 bsf SSP1CON2,SEN ; Start condition |
| 628 rcall WaitMSSP | |
| 629 movlw 0x3C ; address | |
| 630 rcall I2C_TX | |
| 631 movlw 0xE0 ; 0x60 with auto-increment (MSB=1) | |
| 632 rcall I2C_TX | |
| 633 movlw b'00000000' ; CFG_REG_A_M (10Hz, Continuous) | |
| 634 rcall I2C_TX | |
| 635 movlw b'00000000' ; CFG_REG_B_M (Low-Pass Filter off) | |
| 636 rcall I2C_TX | |
| 637 movlw b'00000000' ; CFG_REG_C_M BDU=0 | |
| 638 rcall I2C_TX | |
| 639 bsf SSP1CON2,PEN ; Stop condition | |
| 640 bra WaitMSSP ;(And return) | |
| 641 | |
| 642 | |
| 643 global I2C_sleep_compass | |
| 0 | 644 I2C_sleep_compass: |
| 582 | 645 bcf compass_enabled |
| 646 btfsc compass_type2 ; compass2? | |
| 647 bra I2C_sleep_compass2 ; yes | |
| 648 btfsc compass_type ; compass1? | |
| 649 bra I2C_sleep_compass1 ; yes | |
| 560 | 650 I2C_sleep_compass0: |
| 582 | 651 bsf SSP1CON2,SEN ; Start condition |
| 652 rcall WaitMSSP | |
| 653 movlw 0x3C ; address | |
| 654 rcall I2C_TX | |
| 655 movlw 0x00 | |
| 656 rcall I2C_TX | |
| 657 movlw b'01101000' ; ConfigA | |
| 658 rcall I2C_TX | |
| 659 movlw b'00100000' ; ConfigB | |
| 660 rcall I2C_TX | |
| 661 movlw b'00000010' ; Idle Mode | |
| 662 rcall I2C_TX | |
| 663 bsf SSP1CON2,PEN ; Stop condition | |
| 664 bra WaitMSSP ; (And return) | |
| 0 | 665 |
| 427 | 666 I2C_sleep_compass1: |
| 582 | 667 bsf SSP1CON2,SEN ; Start condition |
| 668 rcall WaitMSSP | |
| 669 movlw 0x3C ; address | |
| 670 rcall I2C_TX | |
| 671 movlw 0x20 ; CTRL_REG1 | |
| 672 rcall I2C_TX | |
| 673 movlw b'00000000' ; data for CTRL_REG1: acceleration sensor Power-down mode | |
| 674 rcall I2C_TX | |
| 675 bsf SSP1CON2,PEN ; Stop condition | |
| 676 rcall WaitMSSP | |
| 677 bsf SSP1CON2,SEN ; Start condition | |
| 678 rcall WaitMSSP | |
| 679 movlw 0x3C ; address | |
| 680 rcall I2C_TX | |
| 681 movlw 0x26 ; CTRL_REG7 | |
| 682 rcall I2C_TX | |
| 683 movlw b'00000010' ; data for CTRL_REG7: magnetic sensor Power-down mode | |
| 684 rcall I2C_TX | |
| 685 bsf SSP1CON2,PEN ; Stop condition | |
| 686 bra WaitMSSP ;(And return) | |
| 560 | 687 |
| 688 I2C_sleep_compass2: | |
| 582 | 689 ; magnetic |
| 690 bsf SSP1CON2,SEN ; Start condition | |
| 691 rcall WaitMSSP | |
| 692 movlw 0x3C ; address | |
| 693 rcall I2C_TX | |
| 694 movlw 0xE0 ; 0x60 with auto-increment (MSB=1) | |
| 695 rcall I2C_TX | |
| 696 movlw b'00000010' ; CFG_REG_A_M (Idle mode) | |
| 697 rcall I2C_TX | |
| 698 bsf SSP1CON2,PEN ; Stop condition | |
| 699 bra WaitMSSP ; (And return) | |
| 700 | |
| 560 | 701 I2C_sleep_accelerometer2: |
| 582 | 702 ; accelerometer |
| 703 bsf SSP1CON2,SEN ; Start condition | |
| 704 rcall WaitMSSP | |
| 705 movlw 0x32 ; address | |
| 706 rcall I2C_TX | |
| 707 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 708 rcall I2C_TX | |
| 709 movlw b'00000000' ; TEMP_CFG_REG_A (Temp sensor off) | |
| 710 rcall I2C_TX | |
| 711 movlw b'00000000' ; CTRL_REG1_A (All off) | |
| 712 rcall I2C_TX | |
| 713 bsf SSP1CON2,PEN ; Stop condition | |
| 714 bra WaitMSSP ; (And return) | |
| 0 | 715 |
| 582 | 716 global I2C_init_accelerometer |
| 0 | 717 I2C_init_accelerometer: |
| 582 | 718 btfsc compass_type2 ; compass2? |
| 719 bra I2C_init_accelerometer2 ; Yes. | |
| 560 | 720 |
| 582 | 721 btfsc compass_type ; compass1? |
| 722 return ; yes, ignore | |
| 427 | 723 |
| 582 | 724 rcall I2C_sleep_accelerometer ; Regs can only be changed in St.By mode |
| 0 | 725 |
| 582 | 726 bsf SSP1CON2,SEN ; Start condition |
| 727 rcall WaitMSSP | |
| 728 movlw 0x38 ; address | |
| 729 rcall I2C_TX | |
| 730 movlw 0x0E ; XYZ_DATA_CFG | |
| 731 rcall I2C_TX | |
| 732 movlw b'00000000' ; High pass Filter=0 , +/- 2g range | |
| 733 rcall I2C_TX | |
| 734 bsf SSP1CON2,PEN ; Stop condition | |
| 735 rcall WaitMSSP | |
| 0 | 736 |
| 582 | 737 bsf SSP1CON2,SEN ; Start condition |
| 738 rcall WaitMSSP | |
| 739 movlw 0x38 ; address | |
| 740 rcall I2C_TX | |
| 741 movlw 0x2A ; CTRL_REG1 | |
| 742 rcall I2C_TX | |
| 743 ; movlw b'00110000' ; CTRL_REG1: 160ms data rate, St.By Mode | |
| 744 movlw b'00110100' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode | |
| 745 rcall I2C_TX | |
| 746 movlw b'00000010' ; CTRL_REG2: High Res in Active mode | |
| 747 rcall I2C_TX | |
| 748 bsf SSP1CON2,PEN ; Stop condition | |
| 749 rcall WaitMSSP | |
| 0 | 750 |
| 582 | 751 bsf SSP1CON2,SEN ; Start condition |
| 752 rcall WaitMSSP | |
| 753 movlw 0x38 ; address | |
| 754 rcall I2C_TX | |
| 755 movlw 0x2A ; CTRL_REG1 | |
| 756 rcall I2C_TX | |
| 757 ; movlw b'00110001' ; CTRL_REG1: 160ms data rate, Active Mode | |
| 758 movlw b'00110101' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode, Active Mode | |
| 759 rcall I2C_TX | |
| 760 bsf SSP1CON2,PEN ; Stop condition | |
| 761 bra WaitMSSP ; (And return) | |
| 762 | |
| 560 | 763 I2C_init_accelerometer2: |
| 582 | 764 bsf SSP1CON2,SEN ; Start condition |
| 765 rcall WaitMSSP | |
| 766 movlw 0x32 ; address | |
| 767 rcall I2C_TX | |
| 768 movlw 0x9F ; 1F with auto-increment (MSB=1) | |
| 769 rcall I2C_TX | |
| 770 movlw b'00000000' ; TEMP_CFG_REG_A (Temp sensor off) | |
| 771 rcall I2C_TX | |
| 772 movlw b'01010111' ; CTRL_REG1_A (100Hz, x,y,z = ON) | |
| 773 rcall I2C_TX | |
| 774 movlw b'00000000' ; CTRL_REG2_A | |
| 775 rcall I2C_TX | |
| 776 ; movlw b'00000000' ; CTRL_REG3_A | |
| 777 ; rcall I2C_TX | |
| 778 ; movlw b'00000000' ; CTRL_REG4_A (BDU=0, +/-2g, | |
| 779 ; rcall I2C_TX | |
| 780 ; movlw b'00000000' ; CTRL_REG5_A | |
| 781 ; rcall I2C_TX | |
| 782 bsf SSP1CON2,PEN ; Stop condition | |
| 783 bra WaitMSSP ; (And return) | |
| 0 | 784 |
| 582 | 785 global I2C_sleep_accelerometer |
| 0 | 786 I2C_sleep_accelerometer: |
| 582 | 787 btfsc compass_type2 ; Compass2 |
| 788 bra I2C_sleep_accelerometer2 ; Yes | |
| 789 btfsc compass_type ; compass1? | |
| 790 return ; yes, ignore | |
| 427 | 791 |
| 582 | 792 bsf SSP1CON2,SEN ; Start condition |
| 793 rcall WaitMSSP | |
| 794 movlw 0x38 ; address | |
| 795 rcall I2C_TX | |
| 796 movlw 0x2A ; CTRL_REG1 | |
| 797 rcall I2C_TX | |
| 798 movlw b'00000000' ; St. By Mode | |
| 799 rcall I2C_TX | |
| 800 bsf SSP1CON2,PEN ; Stop condition | |
| 801 bra WaitMSSP ; (And return) | |
| 802 | |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
803 lt2942_init_again: |
| 582 | 804 clrf i2c_temp1 |
| 805 movlw 0x02 ; Point to accumulated charge registers | |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
806 rcall I2C_TX_GAUGE |
| 582 | 807 movff battery_acumulated_charge+1,SSP1BUF ; Data Byte |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
808 rcall WaitMSSP |
|
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
809 rcall I2C_WaitforACK |
| 582 | 810 movff battery_acumulated_charge+0,SSP1BUF ; Data Byte |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
811 rcall WaitMSSP |
|
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
812 rcall I2C_WaitforACK |
| 582 | 813 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 814 rcall WaitMSSP |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
815 movff battery_acumulated_charge+1,sub_a+1 |
|
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
816 movff battery_acumulated_charge+0,sub_a+0 |
|
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
817 ; and init again... |
| 560 | 818 |
| 582 | 819 global lt2942_init |
| 820 lt2942_init: ; Setup Control register B | |
| 821 clrf i2c_temp1 | |
| 822 movlw 0x01 ; Point to control reg B | |
| 467 | 823 rcall I2C_TX_GAUGE |
| 582 | 824 movlw b'11111000' ; Automatic conversion every two seconds |
| 825 movff WREG, SSP1BUF ; Data Byte | |
| 113 | 826 rcall WaitMSSP |
| 827 rcall I2C_WaitforACK | |
| 582 | 828 bsf SSP1CON2,PEN ; Stop condition |
| 829 bra WaitMSSP ; (And return) | |
| 113 | 830 |
| 831 global lt2942_get_status | |
| 582 | 832 lt2942_get_status: ; Read status register |
| 833 bcf battery_gauge_available ; Clear flag | |
| 834 clrf i2c_temp1 | |
| 835 movlw 0x00 ; Point to Status reg | |
| 467 | 836 rcall I2C_TX_GAUGE |
| 837 rcall I2C_RX_GAUGE | |
| 113 | 838 movff SSP1BUF,WREG |
| 582 | 839 btfss WREG,7 ; 2942 found? |
| 840 bsf battery_gauge_available ; Yes, set flag | |
| 841 bsf SSP1CON2,PEN ; Stop condition | |
| 842 bra WaitMSSP ; (And return) | |
| 113 | 843 |
| 844 | |
| 845 global lt2942_get_voltage | |
| 582 | 846 lt2942_get_voltage: ; Read battery voltage registers |
| 847 clrf i2c_temp1 | |
| 848 movlw 0x08 ; Point to voltage registers | |
| 448 | 849 rcall I2C_TX_GAUGE |
| 850 rcall I2C_RX_GAUGE | |
| 582 | 851 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 113 | 852 rcall WaitMSSP |
| 853 movff SSP1BUF,xA+1 | |
| 582 | 854 bsf SSP1CON2, RCEN ; Enable receive mode |
| 113 | 855 rcall WaitMSSP |
| 856 movff SSP1BUF,xA+0 | |
| 582 | 857 bsf SSP1CON2,PEN ; Stop condition |
| 113 | 858 rcall WaitMSSP |
| 859 | |
| 860 ; banksel common | |
| 582 | 861 ; xA:2 loaded with raw values |
| 862 movlw LOW .6000 | |
| 863 movwf xB+0 | |
| 864 movlw HIGH .6000 | |
| 865 movwf xB+1 | |
| 866 call mult16x16 ; xA*xB=xC | |
| 113 | 867 |
| 582 | 868 ; divide xC (32bit)/65535 for result in mV (16bit) |
| 869 movlw .16 | |
| 870 movwf i2c_temp1 | |
| 113 | 871 lt2942_get_voltage2: |
| 582 | 872 bcf STATUS,C |
| 873 rrcf xC+3,F | |
| 874 rrcf xC+2,F | |
| 875 rrcf xC+1,F | |
| 876 rrcf xC+0,F | |
| 877 decfsz i2c_temp1,F | |
| 878 bra lt2942_get_voltage2 | |
| 113 | 879 |
| 582 | 880 ; Update battery voltage in mV |
| 881 movff xC+1,batt_voltage+1 | |
| 882 movff xC+0,batt_voltage+0 | |
| 466 | 883 |
| 582 | 884 tstfsz batt_voltage+1 ; <256mV? |
| 885 return ; No, done. | |
| 886 bra lt2942_init ;(and return) | |
| 113 | 887 |
| 888 ; global lt2942_get_temperature | |
| 582 | 889 ;lt2942_get_temperature: ; Read temperature registers |
| 890 ; clrf i2c_temp1 | |
| 891 ; movlw 0x0C ; Point to temperature registers | |
| 113 | 892 ; call I2C_TX_GAUGE |
| 893 ; call I2C_RX | |
| 582 | 894 ; bsf SSP1CON2,ACKEN ; Master acknowledge |
| 113 | 895 ; rcall WaitMSSP |
| 896 ; movff SSP1BUF,xA+1 | |
| 582 | 897 ; bsf SSP1CON2, RCEN ; Enable receive mode |
| 113 | 898 ; rcall WaitMSSP |
| 899 ; movff SSP1BUF,xA+0 | |
| 582 | 900 ; bsf SSP1CON2,PEN ; Stop condition |
| 113 | 901 ; rcall WaitMSSP |
| 902 ; | |
| 903 ;; banksel common | |
| 582 | 904 ; ; xA:2 loaded with raw values |
| 905 ; movlw LOW .6000 | |
| 906 ; movwf xB+0 | |
| 907 ; movlw HIGH .6000 | |
| 908 ; movwf xB+1 | |
| 909 ; call mult16x16 ; xA*xB=xC | |
| 113 | 910 ; |
| 582 | 911 ; ; devide xC (32bit)/65535 for result in 0.1K (16bit) |
| 912 ; movlw .16 | |
| 913 ; movwf i2c_temp1 | |
| 113 | 914 ;lt2942_get_temperature2: |
| 582 | 915 ; bcf STATUS,C |
| 916 ; rrcf xC+3,F | |
| 917 ; rrcf xC+2,F | |
| 918 ; rrcf xC+1,F | |
| 919 ; rrcf xC+0,F | |
| 920 ; decfsz i2c_temp1,F | |
| 921 ; bra lt2942_get_temperature2 | |
| 113 | 922 ; |
| 582 | 923 ; movff xC+1,sub_a+1 |
| 924 ; movff xC+0,sub_a+0 | |
| 925 ; movlw LOW .2731 ; Kelvin to Celsius offset | |
| 926 ; movwf sub_b+0 | |
| 927 ; movlw HIGH .2731 ; Kelvin to Celsius offset | |
| 928 ; movwf sub_b+1 | |
| 929 ; call subU16 ; sub_c = sub_a - sub_b (with UNSIGNED values) | |
| 113 | 930 ; |
| 582 | 931 ; ; Update batttery_temperature in 0.1°C |
| 932 ; movff sub_c+1,battery_temperature+1 | |
| 933 ; movff sub_c+0,battery_temperature+0 | |
| 113 | 934 ; return |
| 935 | |
| 936 global lt2942_get_accumulated_charge | |
| 582 | 937 lt2942_get_accumulated_charge: ; Read accumulated charge and compute percent |
| 938 clrf i2c_temp1 | |
| 939 movlw 0x00 ; Point to status register | |
| 467 | 940 rcall I2C_TX_GAUGE |
| 941 rcall I2C_RX_GAUGE | |
| 582 | 942 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 113 | 943 rcall WaitMSSP |
| 466 | 944 movff SSP1BUF,gauge_status_byte |
| 945 | |
| 582 | 946 bsf SSP1CON2, RCEN ; Enable receive mode |
| 947 rcall WaitMSSP ; Dummy read (Control byte) | |
| 467 | 948 movf SSP1BUF,W |
| 582 | 949 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 467 | 950 rcall WaitMSSP |
| 582 | 951 |
| 952 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 113 | 953 rcall WaitMSSP |
| 466 | 954 movff SSP1BUF,sub_a+1 |
| 582 | 955 bsf SSP1CON2,ACKEN ; Master acknowledge |
| 467 | 956 rcall WaitMSSP |
| 582 | 957 |
| 958 bsf SSP1CON2, RCEN ; Enable receive mode | |
| 466 | 959 rcall WaitMSSP |
| 960 movff SSP1BUF,sub_a+0 | |
| 582 | 961 bsf SSP1CON2,PEN ; Stop condition |
| 113 | 962 rcall WaitMSSP |
| 582 | 963 |
| 964 movff gauge_status_byte,sub_b+0 ; copy into bank common | |
| 965 btfsc sub_b+0,0 ; =1: UVLO Event | |
|
556
dd28d4efd4d2
fix a potential issue in the battery managment
heinrichsweikamp
parents:
498
diff
changeset
|
966 rcall lt2942_init_again |
| 113 | 967 |
| 582 | 968 movff sub_a+1,battery_acumulated_charge+1 ; Save raw value |
| 969 movff sub_a+0,battery_acumulated_charge+0 ; Save raw value | |
| 970 | |
| 971 ; Compute batt_percent | |
| 972 ; (charge-battery_offset)/365 | |
| 973 movff battery_offset+0,sub_b+0 | |
| 974 movff battery_offset+1,sub_b+1 | |
| 975 call subU16 ; sub_c = sub_a - sub_b (with signed values) | |
| 113 | 976 |
| 582 | 977 clrf batt_percent ; Set to zero |
| 978 btfsc neg_flag ; result negative? | |
| 979 bra lt2942_set_to_zero_percent ; Yes, keep LT2942 at zero percent and return | |
| 113 | 980 |
| 582 | 981 ; > Zero, set batt_percent properly |
| 982 movff sub_c+0,xA+0 | |
| 983 movff sub_c+1,xA+1 | |
| 984 movff battery_capacity+0,xB+0 | |
| 985 movff battery_capacity+1,xB+1 | |
| 986 call div16x16 ; xA/xB=xC with xA+0 as remainder, uses divB as temp variable | |
| 987 movff xC+0,batt_percent | |
| 988 return | |
| 113 | 989 |
| 449 | 990 lt2942_set_to_zero_percent: |
| 582 | 991 clrf i2c_temp1 |
| 992 movlw 0x02 ; Point to accumulated charge registers | |
| 449 | 993 rcall I2C_TX_GAUGE |
| 994 movff battery_offset+1,SSP1BUF | |
| 995 rcall WaitMSSP | |
| 996 rcall I2C_WaitforACK | |
| 997 movff battery_offset+0,SSP1BUF | |
| 998 rcall WaitMSSP | |
| 999 rcall I2C_WaitforACK | |
| 582 | 1000 bsf SSP1CON2,PEN ; Stop condition |
| 1001 bra WaitMSSP ; (and return) | |
| 449 | 1002 |
| 113 | 1003 global lt2942_charge_done |
| 582 | 1004 lt2942_charge_done: ; Reset accumulating registers to 0xFFFF |
| 1005 clrf i2c_temp1 | |
| 1006 movlw 0x02 ; Point to accumulated charge registers | |
| 448 | 1007 rcall I2C_TX_GAUGE |
| 582 | 1008 setf SSP1BUF ; Data Byte |
| 113 | 1009 rcall WaitMSSP |
| 1010 rcall I2C_WaitforACK | |
| 582 | 1011 setf SSP1BUF ; Data Byte |
| 113 | 1012 rcall WaitMSSP |
| 1013 rcall I2C_WaitforACK | |
| 582 | 1014 bsf SSP1CON2,PEN ; Stop condition |
| 1015 bra WaitMSSP ; (and return) | |
| 113 | 1016 |
| 582 | 1017 I2C_TX_GAUGE: ; Sends a byte to the LT2942 Gauge IC |
| 1018 movwf i2c_temp2 ; Data byte | |
| 1019 bsf SSP1CON2,SEN ; Start condition | |
| 113 | 1020 rcall WaitMSSP |
| 582 | 1021 movlw b'11001000' ; Address byte + Write bit |
| 1022 movwf SSP1BUF ; control byte | |
| 113 | 1023 rcall WaitMSSP |
| 1024 rcall I2C_WaitforACK | |
| 582 | 1025 movf i2c_temp2,W |
| 1026 bra I2C_TX ; (and return) | |
| 1027 | |
| 113 | 1028 I2C_RX_GAUGE: |
| 582 | 1029 bsf SSP1CON2,SEN ; Start condition |
| 113 | 1030 rcall WaitMSSP |
| 582 | 1031 movlw b'11001001' ; Address byte + Read bit |
| 1032 movwf SSP1BUF ; control byte | |
| 113 | 1033 rcall WaitMSSP |
| 1034 rcall I2C_WaitforACK | |
| 582 | 1035 bsf SSP1CON2, RCEN ; Enable receive mode |
| 1036 bra WaitMSSP ; (and return) | |
| 1037 | |
| 1038 | |
| 560 | 1039 global I2C_probe_OSTC_rx |
| 1040 I2C_probe_OSTC_rx: | |
| 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? |
| 1047 bsf ostc_rx_present ; ACK send. OSTC_RX present! | |
| 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! |
| 582 | 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 | |
| 1086 bra WaitMSSP ;(and return) | |
| 1087 | |
| 560 | 1088 |
| 1089 global I2C_get_tankdata | |
| 1090 I2C_get_tankdata: | |
| 582 | 1091 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1092 rcall WaitMSSP |
| 582 | 1093 movlw 0x50 ; Address byte + Write bit |
| 1094 movwf SSP1BUF ; control byte | |
| 560 | 1095 rcall WaitMSSP |
| 1096 rcall I2C_WaitforACK | |
| 582 | 1097 movlw 0x1E ; Read buffer2 (48 Bytes) |
| 560 | 1098 movwf SSP1BUF ; Data Byte |
| 1099 rcall WaitMSSP | |
| 1100 rcall I2C_WaitforACK | |
| 582 | 1101 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1102 rcall WaitMSSP |
| 1103 WAITMS .1 | |
| 1104 | |
| 1105 ; read 48 bytes | |
| 582 | 1106 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1107 rcall WaitMSSP |
| 582 | 1108 movlw 0x51 ; Address byte + read bit |
| 1109 movwf SSP1BUF ; control byte | |
| 560 | 1110 rcall WaitMSSP |
| 1111 rcall I2C_WaitforACK | |
| 582 | 1112 movlw .47 ; 47 with ACK + 1 w/o ACK |
| 1113 movwf i2c_temp2 | |
| 560 | 1114 lfsr FSR2,rx_buffer+0 |
| 1115 I2C_get_tankdata_loop_read: | |
| 582 | 1116 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1117 rcall WaitMSSP |
| 1118 movff SSP1BUF,POSTINC2 | |
| 582 | 1119 bcf SSP1CON2,ACKDT |
| 1120 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 560 | 1121 rcall WaitMSSP |
| 582 | 1122 decfsz i2c_temp2,F |
| 1123 bra I2C_get_tankdata_loop_read | |
| 560 | 1124 |
| 1125 ; 1 w/o ACK | |
| 582 | 1126 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1127 rcall WaitMSSP |
| 1128 movff SSP1BUF,POSTINC2 | |
| 582 | 1129 bsf SSP1CON2,ACKDT |
| 1130 bsf SSP1CON2,ACKEN ; Master NOT acknowledge | |
| 560 | 1131 rcall WaitMSSP |
| 582 | 1132 bcf SSP1CON2,ACKDT ; Reset ACKDT flag |
| 1133 | |
| 1134 bsf SSP1CON2,PEN ; Stop condition | |
| 1135 bra WaitMSSP ;(and return) | |
| 1136 | |
| 1137 | |
| 560 | 1138 global I2C_update_OSTC_rx |
| 582 | 1139 I2C_update_OSTC_rx: ; 992*64byte master loop |
| 1140 bcf i2c_error_flag ; clear error flag | |
| 560 | 1141 ; write 64 bytes |
| 582 | 1142 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1143 rcall WaitMSSP |
| 582 | 1144 movlw 0x50 ; Address byte + Write bit |
| 1145 movwf SSP1BUF ; control byte | |
| 560 | 1146 rcall WaitMSSP |
| 1147 rcall I2C_WaitforACK | |
| 582 | 1148 lfsr FSR2,buffer ; send buffer for verify |
| 560 | 1149 movlw .64 |
| 582 | 1150 movwf i2c_temp2 |
| 1151 I2C_update_OSTC_loop: ; 64byte flash page loop | |
| 1152 movff up,POSTINC2 ; store for verify | |
| 560 | 1153 movff up,SSP1BUF |
| 1154 rcall WaitMSSP | |
| 1155 rcall I2C_WaitforACK | |
| 1156 call ext_flash_read_block ; Read one byte | |
| 582 | 1157 movwf up ; prepare for transmit |
| 1158 decfsz i2c_temp2,F | |
| 1159 bra I2C_update_OSTC_loop | |
| 1160 bsf SSP1CON2,PEN ; Stop condition | |
| 560 | 1161 rcall WaitMSSP |
| 1162 WAITMS .1 | |
| 1163 | |
| 1164 ; read 64 bytes | |
| 582 | 1165 bsf SSP1CON2,SEN ; Start condition |
| 560 | 1166 rcall WaitMSSP |
| 582 | 1167 movlw 0x51 ; Address byte + read bit |
| 1168 movwf SSP1BUF ; control byte | |
| 560 | 1169 rcall WaitMSSP |
| 1170 rcall I2C_WaitforACK | |
| 582 | 1171 lfsr FSR2,buffer ; send buffer for verify |
| 1172 movlw .63 ; 63 with ACK + 1 w/o ACK | |
| 1173 movwf i2c_temp2 | |
| 560 | 1174 I2C_update_OSTC_loop_read: |
| 582 | 1175 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1176 rcall WaitMSSP |
| 1177 movf SSP1BUF,W | |
| 582 | 1178 cpfseq POSTINC2 ; compare read-back with original |
| 1179 bsf i2c_error_flag ; Not equal, set flag | |
| 1180 bcf SSP1CON2,ACKDT | |
| 1181 bsf SSP1CON2,ACKEN ; Master acknowledge | |
| 560 | 1182 rcall WaitMSSP |
| 582 | 1183 decfsz i2c_temp2,F |
| 1184 bra I2C_update_OSTC_loop_read | |
| 560 | 1185 |
| 1186 ; 1 w/o ACK | |
| 582 | 1187 bsf SSP1CON2, RCEN ; Enable receive mode |
| 560 | 1188 rcall WaitMSSP |
| 1189 movf SSP1BUF,W | |
| 582 | 1190 cpfseq POSTINC2 ; compare read-back with original |
| 1191 bsf i2c_error_flag ; Not equal, set flag | |
| 1192 bsf SSP1CON2,ACKDT | |
| 1193 bsf SSP1CON2,ACKEN ; Master NOT acknowledge | |
| 560 | 1194 rcall WaitMSSP |
| 582 | 1195 bcf SSP1CON2,ACKDT ; Reset ACKDT flag |
| 1196 | |
| 1197 bsf SSP1CON2,PEN ; Stop condition | |
| 560 | 1198 rcall WaitMSSP |
| 1199 WAITMS .1 | |
| 582 | 1200 |
| 1201 bsf SSP1CON2,SEN ; Start condition | |
| 560 | 1202 rcall WaitMSSP |
| 582 | 1203 movlw 0x50 ; Address byte + Write bit |
| 1204 movwf SSP1BUF ; control byte | |
| 560 | 1205 rcall WaitMSSP |
| 1206 rcall I2C_WaitforACK | |
| 582 | 1207 movlw 0x1F ; Write command! |
| 1208 movwf SSP1BUF ; Data Byte | |
| 560 | 1209 rcall WaitMSSP |
| 1210 rcall I2C_WaitforACK | |
| 582 | 1211 bsf SSP1CON2,PEN ; Stop condition |
| 560 | 1212 rcall WaitMSSP |
| 582 | 1213 WAITMS .5 ; Required waiting time |
| 1214 | |
| 560 | 1215 btfss i2c_error_flag |
| 582 | 1216 retlw .0 ; All ok |
| 1217 retlw .255 ; an error occurred | |
| 1218 | |
| 1219 END |