Mercurial > public > hwos_code
annotate src/tft.asm @ 365:d0e3fa3ff2e2
minor
| author | heinrichsweikamp |
|---|---|
| date | Wed, 12 Aug 2015 17:41:06 +0200 |
| parents | 9a1c275077b0 |
| children | 0052a7a654b9 |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 3 ; File tft.asm | |
| 4 ; | |
| 5 ; Managing the TFT screen | |
| 6 ; | |
| 7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. | |
| 8 ;============================================================================= | |
| 9 ; HISTORY | |
| 10 ; 2011-05-24 : [jDG] Cleanups from initial Matthias code. | |
| 11 | |
| 275 | 12 #include "hwos.inc" |
| 0 | 13 #include "wait.inc" |
| 14 #include "varargs.inc" | |
| 15 #include "external_flash.inc" | |
| 16 #include "tft_outputs.inc" | |
| 17 #include "eeprom_rs232.inc" | |
| 18 | |
| 19 ;============================================================================= | |
| 20 ; TFT_frame needs to backup coordinates. | |
| 21 CBLOCK tmp | |
| 22 save_top | |
| 23 save_height | |
| 24 save_left | |
| 25 save_width | |
| 26 ds_line ; Current line (0..239). | |
| 27 ds_column ; Current columnx2 (0..159) | |
| 28 ds_pixel:2 ; Current pixel color. | |
| 29 ds_count ; Repetition count. | |
| 30 ENDC | |
| 31 | |
| 32 ;============================================================================= | |
| 33 ; Basic bit-level macros | |
| 34 | |
| 35 RD_H macro | |
| 36 bsf tft_rd,0 | |
| 37 endm | |
| 38 | |
| 39 RD_L macro | |
| 40 bcf tft_rd,0 | |
| 41 endm | |
| 42 | |
| 43 RS_H macro | |
| 44 bsf tft_rs,0 | |
| 45 endm | |
| 46 | |
| 47 RS_L macro | |
| 48 bcf tft_rs,0 | |
| 49 endm | |
| 50 | |
| 51 NCS_H macro | |
| 52 bsf tft_cs,0 | |
| 53 endm | |
| 54 | |
| 55 NCS_L macro | |
| 56 bcf tft_cs,0 | |
| 57 endm | |
| 58 | |
| 59 WR_H macro | |
| 60 bsf tft_nwr,0 | |
| 61 endm | |
| 62 | |
| 63 WR_L macro | |
| 64 bcf tft_nwr,0 | |
| 65 endm | |
| 66 | |
| 67 ;============================================================================= | |
| 68 ; Byte-leve macros | |
| 69 ; | |
| 70 Index_out macro low_b | |
| 71 movlw low_b | |
| 72 rcall TFT_CmdWrite | |
| 73 endm | |
| 74 | |
| 75 Parameter_out macro high_b, low_b | |
| 76 movlw high_b | |
| 77 movwf PORTA ; Upper | |
| 78 movlw low_b | |
| 79 rcall TFT_DataWrite | |
| 80 endm | |
| 81 | |
| 82 | |
| 83 basic CODE | |
| 151 | 84 ; |
| 85 ; | |
| 86 ;;============================================================================= | |
| 87 ;; TFT_write_flash_image | |
| 88 ;; | |
| 89 ;; Inputs: FSR2 = EEPROM address / 256 | |
| 90 ;; win_left, win_top : imagte CENTER position | |
| 91 ;; Outputs: win_height, win_width. | |
| 92 ;; image copyed on screen. | |
| 93 ;; Trashed: PROD, hi, lo | |
| 94 ;; | |
| 95 ; global TFT_write_flash_image | |
| 96 ;TFT_write_flash_image: | |
| 97 ; ; Get back the full 24bit EEPROM address | |
| 98 ; clrf ext_flash_address+0 | |
| 99 ; movff FSR2L,ext_flash_address+1 | |
| 100 ; movf FSR2H,W | |
| 101 ; iorlw 0x30 | |
| 102 ; movwf ext_flash_address+2 | |
| 103 ; | |
| 104 ; ; Read header: width and height | |
| 105 ; global TFT_write_flash_image_addr | |
| 106 ;TFT_write_flash_image_addr: | |
| 107 ; call ext_flash_read_block_start | |
| 108 ; movff SSP2BUF,win_width+0 | |
| 109 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 110 ; btfss SSP2STAT, BF ; Next byte ready ? | |
| 111 ; bra $-2 ; NO: wait... | |
| 112 ; movff SSP2BUF,win_width+1 | |
| 113 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 114 ; btfss SSP2STAT, BF ; Next byte ready ? | |
| 115 ; bra $-2 ; NO: wait... | |
| 116 ; movff SSP2BUF,win_height | |
| 117 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 118 ; btfss SSP2STAT, BF ; Next byte ready ? | |
| 119 ; bra $-2 ; NO: wait... | |
| 120 ; movff SSP2BUF,WREG ; drop 4th byte. | |
| 121 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 122 ; btfss SSP2STAT, BF ; Next byte ready ? | |
| 123 ; bra $-2 ; NO: wait... | |
| 124 ; | |
| 125 ; ; Sanity check on header to avoid badly uploaded images. | |
| 126 ; iorwf WREG ; Check height < 256 | |
| 127 ; bnz TFT_write_flash_image_failed | |
| 128 ; movf win_width+1,W ; Check width < 512 | |
| 129 ; andlw 0xFE | |
| 130 ; bnz TFT_write_flash_image_failed | |
| 131 ; | |
| 132 ; ; Center image on win_top, win_left values | |
| 133 ; bcf STATUS,C ; Clear carry | |
| 134 ; rrcf win_height,W ; And get height/2 | |
| 135 ; subwf win_top,F ; top -= height/2 | |
| 136 ; rrcf win_width+1,W ; Get 9th bit into carry | |
| 137 ; rrcf win_width+0,W ; Get width/2 (in 0..320 range) | |
| 138 ; bcf STATUS,C | |
| 139 ; rrcf WREG,W ; Get width/2 in 0..160 range | |
| 140 ; subwf win_leftx2,F ; left -= width/2 | |
| 141 ; | |
| 142 ; rcall TFT_box_write ; Inputs : win_top, win_leftx2, win_height, win_width(in 1..320 range) | |
| 0 | 143 ; |
| 151 | 144 ; ; Compute number of pixels to move (result on 17 bits !) |
| 145 ; clrf TBLPTRU | |
| 146 ; movf win_width+0,W | |
| 147 ; mulwf win_height ; Result in PRODL:H | |
| 148 ; movf win_width+1,W | |
| 149 ; bz TFT_write_flash_image_1 ; width > 8bits ? | |
| 150 ; movf win_height,W ; YES: add extra | |
| 151 ; addwf PRODH,F | |
| 152 ; rlcf TBLPTRU ; And carry into upper register. | |
| 153 ;TFT_write_flash_image_1: | |
| 154 ; incf PRODH,F ; Pre-condition nested loops | |
| 155 ; incf TBLPTRU,F | |
| 156 ; | |
| 157 ; ; Write pixels | |
| 158 ; Index_out 0x22 ; Frame Memory Data Write start | |
| 159 ; RS_H ; Data | |
| 160 ; | |
| 161 ;TFT_write_flash_image_loop: | |
| 162 ; btfss SSP2STAT, BF ; Buffer full? | |
| 163 ; bra $-2 ; NO: wait... | |
| 164 ; movff SSP2BUF,PORTH ; Read lo | |
| 165 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 166 ; | |
| 167 ; btfss SSP2STAT, BF ; Buffer full? | |
| 168 ; bra $-2 ; NO: wait... | |
| 169 ; movff SSP2BUF,PORTA ; And read hi | |
| 170 ; movwf SSP2BUF ; Write to buffer to initiate new read | |
| 171 ; WR_L | |
| 172 ; WR_H ; Write 1 Pixel | |
| 173 ; | |
| 174 ; decfsz PRODL,F | |
| 175 ; bra TFT_write_flash_image_loop | |
| 176 ; decfsz PRODH,F | |
| 177 ; bra TFT_write_flash_image_loop | |
| 178 ; decfsz TBLPTRU,F | |
| 179 ; bra TFT_write_flash_image_loop | |
| 180 ; | |
| 181 ; btfss SSP2STAT, BF ; Buffer full? | |
| 182 ; bra $-2 ; No, wait | |
| 183 ; movf SSP2BUF,W ; Read dummy byte | |
| 184 ; | |
| 185 ; bsf flash_ncs ; CS=1 | |
| 186 ; movlw 0x00 ; NOP, to stop window mode | |
| 187 ; bra TFT_CmdWrite ; This routine "returns" | |
| 188 ; | |
| 189 ; ;---- Draw a 4x4 red square in place of missing images... | |
| 190 ;TFT_write_flash_image_failed: | |
| 191 ; movlw -1 | |
| 192 ; addwf win_leftx2,F | |
| 193 ; movlw -2 | |
| 194 ; addwf win_top,F | |
| 195 ; movlw 2 | |
| 196 ; movwf win_width+0 | |
| 197 ; clrf win_width+1 | |
| 198 ; movlw 4 | |
| 199 ; movwf win_height | |
| 200 ; movlw color_red | |
| 201 ; rcall TFT_set_color | |
| 202 ; goto TFT_box | |
| 203 ; | |
| 204 ;;============================================================================= | |
| 0 | 205 ; |
| 206 | |
| 207 global TFT_CmdWrite | |
| 208 TFT_CmdWrite: | |
| 209 RS_L ; Command | |
| 210 clrf PORTA ; Upper | |
| 211 movwf PORTH ; Lower | |
| 212 WR_L | |
| 213 WR_H ; Tick | |
| 214 return; | |
| 215 | |
| 216 global TFT_DataWrite | |
| 217 TFT_DataWrite: | |
| 218 RS_H ; Data | |
| 219 movwf PORTH ; Lower | |
| 220 WR_L | |
| 221 WR_H ; Tick | |
| 222 return | |
| 223 | |
| 224 ;============================================================================= | |
| 225 ; | |
| 226 global TFT_ClearScreen | |
| 227 TFT_ClearScreen: | |
| 228 Index_out 0x50 ; Window Horizontal Start Address | |
| 229 Parameter_out 0x00, 0x00 ; 0-239 | |
| 230 Index_out 0x51 ; Window Horizontal End Address | |
| 231 Parameter_out 0x00, 0xEF ; 0-239 | |
| 232 Index_out 0x52 ; Window Vertical Start Address | |
| 233 Parameter_out 0x00, 0x00 ; 0-319 | |
| 234 Index_out 0x53 ; Window Vertical End Address | |
| 235 Parameter_out 0x01, 0x3F ; 0-319 | |
| 236 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 237 Parameter_out 0x00, 0x00 ; 0-239 | |
| 238 Index_out 0x21 ; Frame Memory Vertical Address | |
| 239 Parameter_out 0x01, 0x3F ; 0-319 | |
| 240 | |
| 241 Index_out 0x22 ; Frame Memory Data Write start | |
| 242 | |
| 243 RD_H ; Not Read | |
| 244 RS_H ; Data | |
| 245 NCS_L ; Not CS | |
| 246 clrf PORTH ; Data Lower | |
| 247 | |
| 248 movlw d'10' | |
| 249 movwf tft_temp3 | |
| 250 TFT_ClearScreen2: | |
| 251 movlw d'30' | |
| 252 movwf tft_temp2 | |
| 253 TFT_ClearScreen3: | |
| 254 clrf tft_temp1 ; 30*10*256=76800 Pixels -> Clear complete 240*320 | |
| 255 TFT_ClearScreen4: | |
| 256 WR_L | |
| 257 WR_H ; Tick | |
| 258 decfsz tft_temp1,F | |
| 259 bra TFT_ClearScreen4 | |
| 260 decfsz tft_temp2,F | |
| 261 bra TFT_ClearScreen3 | |
| 262 decfsz tft_temp3,F | |
| 263 bra TFT_ClearScreen2 | |
| 264 return | |
| 265 | |
| 266 ;============================================================================= | |
| 267 ; | |
| 268 global TFT_DisplayOff | |
| 269 TFT_DisplayOff: | |
| 270 clrf CCPR1L ; PWM OFF | |
| 271 clrf PORTA | |
| 272 clrf PORTH | |
| 273 RD_L ; LOW | |
| 274 nop | |
| 275 RS_L ; LOW | |
| 276 bcf tft_nwr | |
| 277 nop | |
| 278 bcf tft_cs | |
| 279 nop | |
| 280 bcf tft_nreset | |
| 281 WAITMS d'1' | |
| 282 bsf tft_power ; inverted... | |
| 283 bcf lightsen_power ; power-down light sensor | |
| 284 return | |
| 285 | |
| 286 ; ----------------------------- | |
| 287 ; TFT boot | |
| 288 ; ----------------------------- | |
| 289 global TFT_boot | |
| 290 TFT_boot: | |
| 291 clrf PORTA | |
| 292 clrf PORTH | |
| 293 RD_L ; LOW | |
| 294 bcf tft_nwr | |
| 295 nop | |
| 296 bcf tft_cs | |
| 297 nop | |
| 298 bcf tft_nreset | |
| 299 WAITMS d'1' | |
| 300 bcf tft_power ; inverted... | |
| 301 WAITMS d'1' | |
| 302 | |
| 303 RD_H ; Keep high | |
| 304 WR_H ; | |
| 305 NCS_L ; Not CS | |
| 306 | |
| 307 WAITMS d'2' | |
| 308 bsf tft_nreset | |
| 309 WAITMS d'150' | |
| 310 bsf lightsen_power ; Supply power to light sensor | |
| 311 | |
| 312 ; Data Transfer Synchronization | |
| 313 Parameter_out 0x00, 0x00 | |
| 314 Parameter_out 0x00, 0x00 | |
| 315 | |
| 360 | 316 Index_out 0x00 |
| 317 rcall TFT_CmdRead_PROD ; Get ID into PRODL:PRODH | |
| 318 ; 5:197 -> display0 | |
| 361 | 319 ;37:147 -> display1 |
| 360 | 320 movlw .5 |
| 321 cpfseq PRODL ; display0? | |
| 322 bra TFT_boot_1 ; No | |
| 323 movlw .197 | |
| 324 cpfseq PRODH ; display0? | |
| 325 bra TFT_boot_1 ; No | |
| 312 | 326 |
| 0 | 327 ; Init through config table... |
| 328 movlw LOW display0_config_table | |
| 329 movwf TBLPTRL | |
| 330 movlw HIGH display0_config_table | |
| 331 movwf TBLPTRH | |
| 332 movlw UPPER display0_config_table | |
| 333 movwf TBLPTRU | |
| 360 | 334 bcf screen_type |
| 335 bra TFT_boot_com | |
| 336 | |
| 337 TFT_boot_1: | |
| 338 ; Init through config table... | |
| 363 | 339 movlw 0x74 |
| 360 | 340 movwf TBLPTRL |
| 363 | 341 movlw 0xF7 |
| 360 | 342 movwf TBLPTRH |
| 363 | 343 movlw 0x01 |
| 360 | 344 movwf TBLPTRU |
| 345 bsf screen_type | |
| 346 | |
| 347 TFT_boot_com: | |
| 0 | 348 rcall display0_init_loop |
| 349 | |
|
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350 Index_out 0x03 |
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351 btfsc flip_screen ; 180° rotation ? |
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352 bra TFT_boot2 ; Yes |
| 360 | 353 |
| 354 btfss screen_type ; display1? | |
| 355 bra TFT_boot1a ; no | |
| 356 Parameter_out 0x10, 0x00 ; display1 | |
| 357 bra TFT_boot3 | |
| 358 TFT_boot1a: | |
| 359 Parameter_out 0x50, 0x20 ; display0 | |
|
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360 bra TFT_boot3 |
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361 TFT_boot2: |
| 360 | 362 btfss screen_type ; display1? |
| 363 bra TFT_boot2a ; no | |
| 364 Parameter_out 0x10, 0x30 ; display1 | |
| 365 bra TFT_boot3 | |
| 366 TFT_boot2a: | |
| 367 Parameter_out 0x50, 0x10 ; display0 | |
|
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368 TFT_boot3: |
| 0 | 369 Index_out 0x22 |
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370 rcall TFT_ClearScreen |
| 0 | 371 Index_out 0x07 |
| 312 | 372 Parameter_out 0x01, 0x33 |
| 0 | 373 return |
| 374 | |
| 375 display0_config_table: | |
| 376 ; Reg, Dat0, Dat1 or 0xFF,0x00,0x00 for end | |
| 377 db 0xA4,0x00,0x01,0xFF,.002,0x00 | |
| 378 db 0x09,0x00,0x01,0x92,0x04,0x00 | |
| 379 db 0x93,0x04,0x02,0x94,0x00,0x02 | |
| 380 db 0x07,0x00,0x00,0x10,0x04,0x30 | |
| 381 db 0x11,0x02,0x37,0x12,0x11,0x8D | |
| 382 db 0x13,0x11,0x00,0x01,0x01,0x00 | |
| 383 db 0x02,0x02,0x00,0x03,0x50,0x20 | |
| 384 db 0x0A,0x00,0x08,0x0D,0x00,0x00 | |
| 385 db 0x0E,0x00,0x30,0xFF,.151,0x00 | |
| 386 db 0x12,0x11,0xBD,0x20,0x00,0x00 | |
| 387 db 0x21,0x00,0x00,0x30,0x06,0x02 | |
| 388 db 0x31,0x56,0x0D,0x32,0x05,0x07 | |
| 389 db 0x33,0x06,0x09,0x34,0x00,0x00 | |
| 390 db 0x35,0x09,0x06,0x36,0x57,0x05 | |
| 391 db 0x37,0x0D,0x06,0x38,0x02,0x06 | |
| 392 db 0x39,0x00,0x00,0xFF,0x00,0x00 | |
| 393 | |
| 394 display0_init_loop: | |
| 395 TBLRD*+ | |
| 396 movlw 0xFF | |
| 397 cpfseq TABLAT | |
| 398 bra display0_config_write ; Write Config pair to Display | |
| 399 ; Delay ms or quit (return) | |
| 400 TBLRD*+ | |
| 401 tstfsz TABLAT ; End of config? | |
| 402 bra $+4 ; No | |
| 403 return ; Done. | |
| 404 movf TABLAT,W | |
| 405 call WAITMSX ; Wait WREG milliseconds | |
| 406 TBLRD*+ ; Dummy read (Third byte of delay command) | |
| 407 bra display0_init_loop ; Loop | |
| 408 | |
| 409 display0_config_write: ; With command in WREG | |
| 410 movf TABLAT,W | |
| 411 rcall TFT_CmdWrite ; Write command | |
| 412 TBLRD*+ ; Get config0 | |
| 413 movff TABLAT,PORTA | |
| 414 TBLRD*+ ; Get config1 | |
| 415 movf TABLAT,W | |
| 416 rcall TFT_DataWrite ; Write config | |
| 417 bra display0_init_loop ; Loop | |
| 418 | |
| 419 | |
| 420 ;============================================================================= | |
| 421 ; Smooth lighting-up of the display: | |
| 422 ; | |
| 423 ; Trashes: WREG, PRODL | |
| 424 ; Typical usage: | |
| 425 ; clrf CCPR1L ; Backlight off | |
| 426 ; [draw splash screen] | |
| 427 ; call TFT_DisplayFadeIn | |
| 428 ; | |
| 429 global TFT_Display_FadeIn | |
| 430 TFT_Display_FadeIn: | |
| 275 | 431 movlw CCP1CON_VALUE ; See hwos.inc |
| 0 | 432 movwf CCP1CON |
| 433 bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! | |
| 434 clrf CCPR1L ; Backlight off - to be sure | |
| 435 movff max_CCPR1L,PRODL | |
| 436 TFT_Display_FadeIn_0: | |
| 437 incf CCPR1L,F ; Duty cycle | |
| 438 WAITMS d'2' | |
| 439 decfsz PRODL,F | |
| 440 bra TFT_Display_FadeIn_0 | |
| 441 bcf tft_is_dimming ; dimming done. | |
| 442 return | |
| 443 | |
| 444 ;============================================================================= | |
| 445 ; Smooth lighting-off of the display: | |
| 446 ; Trashes: WREG, PRODL | |
| 447 global TFT_Display_FadeOut | |
| 448 TFT_Display_FadeOut: | |
| 449 movff max_CCPR1L,PRODL | |
| 450 bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! | |
| 451 TFT_Display_FadeOut_0: | |
| 452 movff PRODL,CCPR1L ; Duty cycle | |
| 453 WAITMS d'1' | |
| 454 decfsz PRODL,F | |
| 455 bra TFT_Display_FadeOut_0 | |
| 456 clrf CCPR1L | |
| 457 return | |
| 458 | |
| 459 ;============================================================================= | |
| 460 | |
| 461 global box_std_block, box_black_block, box_color_block | |
| 462 | |
| 463 box_std_block: ; Use white color | |
| 464 setf WREG | |
| 465 bra box_common | |
| 466 box_black_block: ; Use black color | |
| 467 clrf WREG | |
| 468 box_common: | |
| 469 box_color_block: | |
| 470 rcall TFT_set_color | |
| 471 VARARGS_BEGIN | |
| 472 VARARGS_GET8 win_top | |
| 473 VARARGS_GET8 win_height | |
| 474 VARARGS_GET8 win_leftx2 | |
| 475 VARARGS_GET8 win_width | |
| 476 VARARGS_END | |
| 477 bra TFT_box | |
| 478 | |
| 479 ;----------------------------------------------------------------------------- | |
| 480 | |
| 481 global box_frame_std, box_frame_common, box_frame_color, box_frame_color16 | |
| 482 | |
| 483 box_frame_std: | |
| 484 setf WREG | |
| 485 rcall TFT_set_color | |
| 486 | |
| 487 box_frame_common: | |
| 488 VARARGS_BEGIN | |
| 489 VARARGS_GET8 win_top | |
| 490 VARARGS_GET8 win_height | |
| 491 VARARGS_GET8 win_leftx2 | |
| 492 VARARGS_GET8 win_width | |
| 493 VARARGS_END | |
| 494 bra TFT_frame | |
| 495 | |
| 496 box_frame_color: | |
| 497 rcall TFT_set_color | |
| 498 box_frame_color16: | |
| 499 bra box_frame_common | |
| 500 | |
| 501 ;============================================================================= | |
| 502 ; Init for half_pixel_write | |
| 503 ; Set column register on TFT device, and current color. | |
| 504 ; Inputs: win_leftx2 | |
| 505 ; Outputs: win_color:2 | |
| 506 ; Trashed: WREG, PROD | |
| 507 global init_pixel_write | |
| 508 init_pixel_write: | |
| 509 movff win_leftx2,WREG | |
| 510 mullw 2 | |
| 511 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 512 setf WREG | |
| 513 bra TFT_set_color | |
| 514 | |
| 515 ;----------------------------------------------------------------------------- | |
| 516 ; Writes two half-pixels at position (win_top,win_leftx2) | |
| 517 ; Inputs: win_leftx2, win_top, win_color:2 | |
| 518 ; Trashed: WREG, PROD | |
| 519 global pixel_write | |
| 520 pixel_write: | |
| 521 movff win_leftx2,WREG | |
| 522 mullw 2 ; win_leftx2 x 2 -> PRODH:PRODL | |
| 523 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 524 rcall half_pixel_write ; Write this half-one. | |
| 525 | |
| 526 movff win_leftx2,WREG ; Address of next one | |
| 527 mullw 2 | |
| 528 infsnz PRODL ; +1 | |
| 529 incf PRODH | |
| 530 rcall pixel_write_col320 | |
| 531 bra half_pixel_write ; Note: Cmd 0x20 is mandatory, because | |
| 532 ; of the autoincrement going vertical | |
| 533 | |
| 534 global pixel_write_col320 | |
| 535 pixel_write_col320: | |
| 151 | 536 btfss flip_screen ; 180° rotation? |
| 537 bra pixel_write_noflip_H ; No | |
| 538 | |
| 539 movf PRODL,W ; 16bits 319 - PROD --> PROD | |
| 540 sublw LOW(.319) ; 319-W --> W | |
| 541 movwf PRODL | |
| 542 movf PRODH,W | |
| 543 btfss STATUS,C ; Borrow = /CARRY | |
| 544 incf WREG | |
| 545 sublw HIGH(.319) | |
| 546 movwf PRODH | |
| 547 | |
| 548 pixel_write_noflip_H: | |
| 0 | 549 Index_out 0x21 ; Frame Memory Vertical Address |
| 550 bra TFT_DataWrite_PROD | |
| 551 | |
| 552 ;----------------------------------------------------------------------------- | |
| 553 ; Writes one half-pixel at position (win_top,win_leftx2). | |
| 554 ; Inputs: win_leftx2, win_top, win_color:2 | |
| 555 ; Trashed: WREG, PROD | |
| 556 global half_pixel_write | |
| 557 half_pixel_write: | |
| 558 movff win_top,WREG ; d'0' ... d'239' | |
| 559 ; Variant with Y position in WREG. | |
| 560 half_pixel_write_1: | |
| 151 | 561 btfss flip_screen ; 180° rotation? |
| 562 sublw .239 ; 239-Y --> Y | |
| 563 mullw 1 ; Copy row to PRODL (PRODH=0) | |
| 0 | 564 |
| 565 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 566 rcall TFT_DataWrite_PROD | |
| 567 | |
| 568 Index_out 0x22 ; Frame Memory Data Write start | |
| 569 RS_H ; Data | |
| 570 movff win_color1,PORTA ; Upper | |
| 571 movff win_color2,PORTH ; Lower | |
| 572 WR_L | |
| 573 WR_H ; Tick | |
| 574 return | |
| 575 | |
| 576 ;----------------------------------------------------------------------------- | |
| 577 ; Writes a vertical line of half-pixel at position (win_top,win_leftx2,win_height). | |
| 578 ; Inputs: win_leftx2, win_top, win_height, win_color:2 | |
| 579 ; Trashed: WREG, PROD, TABLAT, TBLPTRL | |
| 580 global half_vertical_line | |
| 581 half_vertical_line: | |
| 582 clrf TABLAT ; Loop index. | |
| 583 | |
| 584 half_vertical_line_loop: | |
| 585 movff win_leftx2,WREG ; Init X position. | |
| 586 mullw 2 | |
| 587 movf TABLAT,W ; Get loop index | |
| 588 andlw 1 ; Just low bit | |
| 589 xorwf PRODL,F ; And use it to jitter current X position | |
| 590 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 591 | |
| 592 movff win_height,WREG ; Index reached height (Bank0 read) ? | |
| 593 xorwf TABLAT,W | |
| 594 btfsc STATUS,Z ; Equals ? | |
| 595 return ; Yes: done. | |
| 596 movff win_top,WREG ; Y = top + index (Bank0 read) | |
| 597 addwf TABLAT,W | |
| 598 rcall half_pixel_write_1 | |
| 599 incf TABLAT,F ; index++ | |
| 600 bra half_vertical_line_loop | |
| 601 | |
| 602 ;----------------------------------------------------------------------------- | |
| 603 ; Writes a horizontal line of half-pixel at position (win_top,win_leftx2,win_width). | |
| 604 ; Inputs: win_leftx2, win_top, win_width, win_color:2 | |
| 605 ; Trashed: WREG, PROD, TABLAT, TBLPTRL | |
| 606 global half_horizontal_line | |
| 607 half_horizontal_line: | |
| 608 clrf TABLAT ; Loop index. | |
| 609 | |
| 610 half_horizontal_line_loop: | |
| 611 movff win_leftx2,WREG ; Init X position. | |
| 612 mullw 2 | |
| 613 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 614 movff win_width,WREG ; Index reached height (Bank0 read) ? | |
| 615 xorwf TABLAT,W | |
| 616 btfsc STATUS,Z ; Equals ? | |
| 617 return ; Yes: done. | |
| 618 movff win_top,WREG ; Y = top + index (Bank0 read) | |
| 619 addwf TABLAT,W | |
| 620 rcall half_pixel_write_1 | |
| 621 incf TABLAT,F ; index++ | |
| 622 bra half_horizontal_line_loop | |
| 623 | |
| 624 | |
| 625 ;----------------------------------------------------------------------------- | |
| 626 ; TFT Data Cmd via W | |
| 627 ; | |
| 628 global TFT_DataWrite_PROD | |
| 629 TFT_DataWrite_PROD: | |
| 630 ; RD_H ; Keep high | |
| 631 RS_H ; Data | |
| 632 movff PRODH,PORTA ; Move high byte to PORTA | |
| 633 movff PRODL,PORTH ; Move low byte to PORTH | |
| 634 WR_L | |
| 635 WR_H ; Tick | |
| 636 return | |
| 637 | |
| 638 TFT_DataRead_PROD: | |
| 639 Index_out 0x22 ; Frame Memory Data Read start | |
| 360 | 640 TFT_CmdRead_PROD: |
| 0 | 641 setf TRISA ; PortA as input. |
| 642 setf TRISH ; PortH as input. | |
| 643 RS_H ; Data | |
| 644 WR_H ; Not write | |
| 645 RD_L ; Read! | |
| 646 nop | |
| 647 nop | |
| 648 nop | |
| 649 RD_H ; Tick | |
| 650 nop | |
| 651 RD_L ; Read! | |
| 652 nop | |
| 653 nop | |
| 654 nop | |
| 655 movff PORTA,PRODH | |
| 656 movff PORTH,PRODL | |
| 657 RD_H ; Tick | |
| 658 nop | |
| 659 clrf TRISA ; PortA as output | |
| 660 clrf TRISH ; PortH as output | |
| 661 return | |
| 662 | |
| 663 | |
| 664 | |
| 665 ;============================================================================= | |
| 666 ; Output TFT Window Address commands. | |
| 667 ; Inputs : win_top, win_leftx2, win_height, win_width. | |
| 668 ; Output : PortA/PortH commands. | |
| 669 ; Trashed: PROD | |
| 670 ; | |
| 671 global TFT_box_write | |
| 672 TFT_box_write: | |
| 673 movff win_leftx2,WREG ; Compute left = 2*leftx2 --> PROD | |
| 674 mullw 2 | |
| 675 | |
|
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676 global TFT_box_write_16bit_win_left |
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677 TFT_box_write_16bit_win_left: ; With column in PRODL:PRODH |
| 361 | 678 btfsc screen_type ; display1? |
| 679 bra TFT_box_write_16bit_win_left_d1 ; Yes | |
| 680 ; Display0 | |
| 681 btfsc flip_screen ; 180° rotation? | |
| 151 | 682 bra DISP_box_flip_H ; Yes |
| 361 | 683 bra TFT_box_write_16bit_win_left_com ; No |
| 684 TFT_box_write_16bit_win_left_d1: ; Display1 | |
| 685 btfss flip_screen ; 180° rotation? | |
| 686 bra DISP_box_flip_H ; Yes | |
| 687 ; No | |
| 688 TFT_box_write_16bit_win_left_com: | |
| 0 | 689 ;---- Normal horizontal window --------------------------------------- |
| 690 Index_out 0x52 ; Window Vertical Start Address | |
| 691 rcall TFT_DataWrite_PROD ; Output left | |
| 692 Index_out 0x21 ; Frame Memory Vertical Address | |
| 693 rcall TFT_DataWrite_PROD ; Output left | |
| 694 | |
| 695 movff win_width+0,WREG ; right = left + width - 1 | |
| 696 addwf PRODL,F | |
| 697 movff win_width+1,WREG | |
| 698 addwfc PRODH,F | |
| 699 decf PRODL,F ; decrement result | |
| 700 btfss STATUS,C | |
| 701 decf PRODH,F | |
| 702 | |
| 703 Index_out 0x53 ; Window Vertical End Address | |
| 704 rcall TFT_DataWrite_PROD | |
| 151 | 705 bra DISP_box_noflip_H |
| 0 | 706 |
| 151 | 707 ;---- Flipped horizontal window -------------------------------------- |
| 708 DISP_box_flip_H: | |
| 709 movf PRODL,W ; 16bits 319 - PROD --> PROD | |
| 710 sublw LOW(.319) ; 319-W --> W | |
| 711 movwf PRODL | |
| 712 movf PRODH,W | |
| 713 btfss STATUS,C ; Borrow = /CARRY | |
| 714 incf WREG | |
| 715 sublw HIGH(.319) | |
| 716 movwf PRODH | |
|
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717 |
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718 Index_out 0x53 ; Window Vertical Start Address |
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719 rcall TFT_DataWrite_PROD ; Output left |
| 151 | 720 Index_out 0x21 ; Frame Memory Vertical Address |
|
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721 rcall TFT_DataWrite_PROD ; Output left |
| 151 | 722 |
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723 movff win_width+0,WREG ; 16bits PROD - width --> PROD |
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724 subwf PRODL,F ; PRODL - WREG --> PRODL |
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725 movff win_width+1,WREG |
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726 subwfb PRODH,F |
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727 infsnz PRODL ; PROD+1 --> PROD |
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728 incf PRODH |
| 151 | 729 |
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730 Index_out 0x52 ; Window Vertical End Address |
| 151 | 731 rcall TFT_DataWrite_PROD |
| 732 | |
| 733 DISP_box_noflip_H: | |
| 734 btfss flip_screen ; 180° rotation ? | |
|
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735 bra TFT_box_noflip_V ; No. |
| 151 | 736 |
|
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737 ;---- Flipped vertical window ----------------------------------------- |
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738 movff win_top,PRODH ; top --> PRODH (first byte) |
| 151 | 739 movff win_height,WREG |
|
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740 addwf PRODH,W |
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741 decf WREG |
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742 movwf PRODL ; top+height-1 --> PRODL (second byte) |
| 151 | 743 |
| 744 Index_out 0x50 ; Window Horizontal Start Address | |
| 745 movf PRODH,W | |
| 746 rcall TFT_DataWrite ; Lower (and tick) | |
| 747 | |
| 748 Index_out 0x51 ; Window Horizontal End Address | |
| 749 movf PRODL,W | |
| 750 rcall TFT_DataWrite ; Lower (and tick) | |
| 751 | |
| 752 Index_out 0x20 ; Frame Memory Horizontal Address | |
|
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753 movf PRODH,W |
| 151 | 754 rcall TFT_DataWrite ; Lower (and tick) |
| 755 return | |
| 756 | |
| 757 | |
|
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758 TFT_box_noflip_V: |
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759 ;---- Normal vertical window ---------------------------------------- |
| 0 | 760 movff win_top,PRODL |
| 761 movff win_height,WREG | |
| 762 addwf PRODL,W | |
| 763 sublw .240 ; 240 - top - height | |
| 764 movwf PRODH ; First byte | |
| 765 | |
| 766 movf PRODL,W | |
| 151 | 767 sublw .239 ; 239-top |
| 0 | 768 movwf PRODL ; --> second byte. |
| 769 | |
| 770 Index_out 0x50 ; Window Horizontal Start Address | |
| 771 movf PRODH,W | |
| 772 rcall TFT_DataWrite ; Lower (and tick) | |
| 773 | |
| 774 Index_out 0x51 ; Window Horizontal End Address | |
| 775 movf PRODL,W | |
| 776 rcall TFT_DataWrite ; Lower (and tick) | |
| 777 | |
| 778 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 779 movf PRODL,W | |
| 780 rcall TFT_DataWrite ; Lower (and tick) | |
| 781 return | |
| 782 | |
| 783 | |
| 784 ;============================================================================= | |
| 785 ; TFT_frame : draw a frame around current box with current color. | |
| 786 ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 | |
| 787 ; Outputs: (none) | |
| 788 ; Trashed: WREG, PROD, aa_start:2, aa_end:2 | |
| 789 global TFT_frame | |
| 790 TFT_frame: | |
| 791 movff win_top,save_top ; Backup everything. | |
| 792 movff win_height,save_height | |
| 793 movff win_leftx2,save_left | |
| 794 movff win_width,save_width | |
| 795 | |
| 796 ;---- TOP line ----------------------------------------------------------- | |
| 797 movlw 1 ; row ~ height=1 | |
| 798 movff WREG,win_height | |
| 799 rcall TFT_box | |
| 800 | |
| 801 ;---- BOTTOM line -------------------------------------------------------- | |
| 802 movff save_top,PRODL ; Get back top, | |
| 803 movff save_height,WREG ; and height | |
| 804 addwf PRODL,W ; top+height | |
| 805 decf WREG ; top+height-1 | |
| 806 movff WREG,win_top ; top+height-1 --> top | |
| 807 rcall TFT_box | |
| 808 | |
| 809 ;---- LEFT column -------------------------------------------------------- | |
| 810 movff save_top,win_top ; Restore top/height. | |
| 811 movff save_height,win_height | |
| 812 movlw 1 ; column ~ width=1 | |
| 813 movff WREG,win_width | |
| 814 rcall TFT_box | |
| 815 | |
| 816 ;---- RIGHT column ------------------------------------------------------- | |
| 817 movff save_left,WREG | |
| 818 movff save_width,PRODL | |
| 819 addwf PRODL,W | |
| 820 decf WREG | |
| 821 movff WREG,win_leftx2 | |
| 822 rcall TFT_box | |
| 823 | |
| 824 ;---- Restore everything ------------------------------------------------- | |
| 825 movff save_left,win_leftx2 | |
| 826 movff save_width,win_width | |
| 827 return | |
| 828 | |
| 829 ;============================================================================= | |
| 830 ; TFT_box : fills current box with current color. | |
| 831 ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 | |
| 832 ; Outputs: (none) | |
| 833 ; Trashed: WREG, PROD | |
| 834 global TFT_box | |
| 835 | |
| 836 TFT_box: | |
| 837 ;---- Define Window ------------------------------------------------------ | |
| 838 movf win_width,W | |
| 839 bcf STATUS,C | |
| 840 rlcf WREG | |
| 841 movwf win_width+0 | |
| 842 movlw 0 | |
| 843 rlcf WREG | |
| 844 movwf win_width+1 | |
| 83 | 845 rcall TFT_box_write ; Setup box |
| 0 | 846 |
| 83 | 847 global TFT_box_16bit_win_left |
| 848 TFT_box_16bit_win_left: | |
| 0 | 849 rrcf win_width+1,W ; width /= 2 |
| 850 rrcf win_width+0,W | |
| 851 movwf win_width | |
| 852 | |
| 853 ;---- Fill Window -------------------------------------------------------- | |
| 854 Index_out 0x22 ; Frame Memory Data Write start | |
| 855 | |
| 856 clrf PRODH ; Column counter. | |
| 857 RS_H ; Data | |
| 858 | |
| 859 TFT_box2: ; Loop height times | |
| 860 movff win_height,PRODL | |
| 861 | |
| 862 TFT_box3: ; loop width times | |
| 863 movff win_color1,PORTA ; Upper | |
| 864 movff win_color2,PORTH ; Lower | |
| 865 WR_L | |
| 866 WR_H ; Tick | |
| 867 | |
| 868 movff win_color1,PORTA ; Upper | |
| 869 movff win_color2,PORTH ; Lower | |
| 870 WR_L | |
| 871 WR_H ; Tick | |
| 872 | |
| 873 decfsz PRODL,F ; row loop finished ? | |
| 874 bra TFT_box3 ; No: continue. | |
| 875 | |
| 876 incf PRODH,F ; column count ++ | |
| 877 | |
| 878 movff win_bargraph,WREG ; current column == bargraph ? | |
| 879 cpfseq PRODH | |
| 880 bra TFT_box4 ; No: just loop. | |
| 881 | |
| 882 clrf WREG ; Yes: switch to black | |
| 883 movff WREG,win_color1 | |
| 884 movff WREG,win_color2 | |
| 885 TFT_box4: | |
| 886 | |
| 887 movff win_width+0,WREG ; compare ? | |
| 888 xorwf PRODH,W | |
| 889 bnz TFT_box2 ; Loop not finished. | |
| 890 | |
| 891 movlw 0x00 ; NOP, to stop window mode | |
| 892 rcall TFT_CmdWrite | |
| 893 | |
| 894 setf WREG ; Reset bargraph mode... | |
| 895 movff WREG,win_bargraph | |
| 896 | |
| 897 return | |
| 898 | |
| 899 ;============================================================================= | |
| 900 ;Converts 8Bit RGB b'RRRGGGBB' into 16Bit RGB b'RRRRRGGGGGGBBBBB' | |
| 901 global TFT_set_color | |
| 902 | |
| 903 TFT_set_color: | |
| 904 movwf tft_temp1 ; Get 8Bit RGB b'RRRGGGBB' | |
| 905 movwf tft_temp2 ; Copy | |
| 906 | |
| 907 ; Mask Bit 7,6,5,4,3,2 | |
| 908 movlw b'00000011' | |
| 909 andwf tft_temp2,F | |
| 910 | |
| 911 movlw b'00000000' | |
| 912 dcfsnz tft_temp2,F | |
| 913 movlw b'01010000' | |
| 914 dcfsnz tft_temp2,F | |
| 915 movlw b'10100000' | |
| 916 dcfsnz tft_temp2,F | |
| 917 movlw b'11111000' | |
| 918 movwf tft_temp3 ; Blue done. | |
| 919 | |
| 920 movff tft_temp1, tft_temp2 ; Copy | |
| 921 ; Mask Bit 7,6,5,1,0 | |
| 922 movlw b'00011100' | |
| 923 andwf tft_temp2,F | |
| 924 rrncf tft_temp2,F | |
| 925 rrncf tft_temp2,F | |
| 926 | |
| 927 movlw b'00000000' | |
| 928 dcfsnz tft_temp2,F | |
| 929 movlw b'00000100' | |
| 930 dcfsnz tft_temp2,F | |
| 931 movlw b'00001000' | |
| 932 dcfsnz tft_temp2,F | |
| 933 movlw b'00001100' | |
| 934 dcfsnz tft_temp2,F | |
| 935 movlw b'00010000' | |
| 936 dcfsnz tft_temp2,F | |
| 937 movlw b'00010100' | |
| 938 dcfsnz tft_temp2,F | |
| 939 movlw b'00100000' | |
| 940 dcfsnz tft_temp2,F | |
| 941 movlw b'00111111' | |
| 942 movwf tft_temp4 | |
| 943 | |
| 944 rrcf tft_temp4,F | |
| 945 rrcf tft_temp3,F | |
| 946 | |
| 947 rrcf tft_temp4,F | |
| 948 rrcf tft_temp3,F | |
| 949 | |
| 950 rrcf tft_temp4,F | |
| 951 rrcf tft_temp3,F ; tft_temp3 (b'GGGBBBBB') done. | |
| 952 | |
| 953 movff tft_temp1, tft_temp2 ; Copy | |
| 954 clrf tft_temp1 | |
| 955 | |
| 956 rrcf tft_temp4,F | |
| 957 rrcf tft_temp1,F | |
| 958 | |
| 959 rrcf tft_temp4,F | |
| 960 rrcf tft_temp1,F | |
| 961 | |
| 962 rrcf tft_temp4,F | |
| 963 rrcf tft_temp1,F ; Green done. | |
| 964 | |
| 965 ; Mask Bit 4,3,2,1,0 | |
| 966 movlw b'11100000' | |
| 967 andwf tft_temp2,F | |
| 968 | |
| 969 rrncf tft_temp2,F | |
| 970 rrncf tft_temp2,F | |
| 971 rrncf tft_temp2,F | |
| 972 rrncf tft_temp2,F | |
| 973 rrncf tft_temp2,F | |
| 974 | |
| 975 movlw b'00000000' | |
| 976 dcfsnz tft_temp2,F | |
| 977 movlw b'00000100' | |
| 978 dcfsnz tft_temp2,F | |
| 979 movlw b'00001000' | |
| 980 dcfsnz tft_temp2,F | |
| 981 movlw b'00001100' | |
| 982 dcfsnz tft_temp2,F | |
| 983 movlw b'00010000' | |
| 984 dcfsnz tft_temp2,F | |
| 985 movlw b'00010100' | |
| 986 dcfsnz tft_temp2,F | |
| 987 movlw b'00100000' | |
| 988 dcfsnz tft_temp2,F | |
| 989 movlw b'00111111' | |
| 990 movwf tft_temp4 | |
| 991 | |
| 992 rrcf tft_temp4,F | |
| 993 rrcf tft_temp1,F | |
| 994 | |
| 995 rrcf tft_temp4,F | |
| 996 rrcf tft_temp1,F | |
| 997 | |
| 998 rrcf tft_temp4,F | |
| 999 rrcf tft_temp1,F | |
| 1000 | |
| 1001 rrcf tft_temp4,F | |
| 1002 rrcf tft_temp1,F | |
| 1003 | |
| 1004 rrcf tft_temp4,F | |
| 1005 rrcf tft_temp1,F ; Red done. | |
| 1006 | |
| 1007 movff tft_temp1,win_color1 | |
| 1008 movff tft_temp3,win_color2 ; Set Bank0 Color registers... | |
| 1009 return | |
| 1010 | |
| 1011 ;============================================================================= | |
| 1012 ; Dump screen contents to the UART | |
| 1013 | |
| 1014 global TFT_dump_screen | |
| 1015 TFT_dump_screen: | |
| 1016 bsf no_sensor_int | |
| 1017 movlw 'l' | |
| 1018 movwf TXREG ; Send command echo. | |
| 1019 call rs232_wait_tx ; wait for UART | |
| 1020 ;---- Send DISPLAY box command for the full screen window ------------------- | |
| 1021 Index_out 0x50 ; Window Horizontal Start Address | |
| 1022 Parameter_out 0x00, 0x00 ; 0-239 | |
| 1023 Index_out 0x51 ; Window Horizontal End Address | |
| 1024 Parameter_out 0x00, 0xEF ; 0-239 | |
| 1025 Index_out 0x52 ; Window Vertical Start Address | |
| 1026 Parameter_out 0x00, 0x00 ; 0-319 | |
| 1027 Index_out 0x53 ; Window Vertical End Address | |
| 1028 Parameter_out 0x01, 0x3F ; 0-319 | |
| 1029 | |
| 1030 clrf ds_column | |
| 1031 rcall dump_screen_pixel_reset | |
| 1032 dump_screen_1: | |
| 1033 btg LEDr ; LED activity toggle | |
| 1034 ; Dump even column | |
| 1035 movlw .240 ; 240 lines, once. | |
| 1036 movwf ds_line | |
| 1037 dump_screen_2: | |
| 1038 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 1039 movff ds_line,WREG ; d'0' ... d'239' | |
| 1040 mullw 1 ; Copy row to PRODH:L | |
| 1041 rcall TFT_DataWrite_PROD | |
| 1042 | |
| 1043 movff ds_column,WREG ; Init X position. | |
| 1044 mullw 2 | |
| 1045 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 1046 | |
| 1047 rcall TFT_DataRead_PROD ; read pixel | |
| 1048 rcall dump_screen_pixel | |
| 1049 | |
| 1050 decfsz ds_line,F | |
| 1051 bra dump_screen_2 | |
| 1052 rcall dump_screen_pixel_flush | |
| 1053 | |
| 1054 ; Dump odd column | |
| 1055 movlw .240 ; 240 lines, twice. | |
| 1056 movwf ds_line | |
| 1057 dump_screen_3: | |
| 1058 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 1059 movff ds_line,WREG ; d'0' ... d'239' | |
| 1060 mullw 1 ; Copy row to PRODH:L | |
| 1061 rcall TFT_DataWrite_PROD | |
| 1062 | |
| 1063 movff ds_column,WREG ; Init X position. | |
| 1064 mullw 2 | |
| 1065 movlw .1 | |
| 1066 addwf PRODL,F | |
| 1067 movlw 0 | |
| 1068 addwfc PRODH,F ; +1 | |
| 1069 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 1070 | |
| 1071 rcall TFT_DataRead_PROD ; read pixel | |
| 1072 rcall dump_screen_pixel | |
| 1073 | |
| 1074 decfsz ds_line,F | |
| 1075 bra dump_screen_3 | |
| 1076 rcall dump_screen_pixel_flush | |
| 1077 | |
| 1078 incf ds_column,F | |
| 1079 movlw .160 | |
| 1080 cpfseq ds_column | |
| 1081 bra dump_screen_1 | |
| 1082 | |
| 1083 bcf no_sensor_int | |
| 1084 clrf RCREG1 ; Clear receive buffer | |
| 1085 bcf RCSTA1,CREN ; Clear receiver status | |
| 1086 bsf RCSTA1,CREN | |
| 1087 bsf enable_screen_dumps ; =1: Ignore vin_usb, wait for "l" command (Screen dump) | |
| 1088 return | |
| 1089 | |
| 1090 | |
| 1091 ;============================================================================= | |
| 1092 ; Pixel compression | |
| 1093 ; | |
| 1094 ; Input: PRODH:L = pixel. | |
| 1095 ; Output: Compressed stream on output. | |
| 1096 ; Compressed format: | |
| 1097 ; 0ccccccc : BLACK pixel, repeated ccccccc+1 times (1..128). | |
| 1098 ; 11cccccc : WHITE pixel, repeated cccccc+1 times (1..64). | |
| 1099 ; 10cccccc HIGH LOW : color pixel (H:L) repeated ccccc+1 times (1..64). | |
| 1100 ; | |
| 1101 dump_screen_pixel: | |
| 1102 movf PRODH,W ; Compare pixel-high | |
| 1103 xorwf ds_pixel+1,W | |
| 1104 bnz dump_screen_pixel_1 ; Different -> dump. | |
| 1105 | |
| 1106 movf PRODL,W ; Compare pixel-low | |
| 1107 xorwf ds_pixel+0,W | |
| 1108 bnz dump_screen_pixel_1 ; Different -> dump. | |
| 1109 | |
| 1110 incf ds_count,F ; Same color: just increment. | |
| 1111 return | |
| 1112 | |
| 1113 dump_screen_pixel_1: ; Send (pixel,count) tuple | |
| 1114 movf ds_count,W ; Is count zero ? | |
| 1115 bz dump_screen_pixel_2 ; Yes: skip sending. | |
| 1116 | |
| 1117 movf ds_pixel+1,W ; This is a BLACK pixel ? | |
| 1118 iorwf ds_pixel+0,W | |
| 1119 bz dump_screen_pix_black ; YES. | |
| 1120 | |
| 1121 movf ds_pixel+1,W ; This is a white pixel ? | |
| 1122 andwf ds_pixel+0,W | |
| 1123 incf WREG | |
| 1124 bz dump_screen_pix_white ; YES. | |
| 1125 | |
| 1126 ; No: write the pixel itself... | |
| 1127 movlw .64 ; Max color pixel on a single byte. | |
| 1128 cpfsgt ds_count ; Skip if count > 64 | |
| 1129 movf ds_count,W ; W <- min(64,count) | |
| 1130 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1131 decf WREG ; Save as 0..63 | |
| 1132 iorlw b'10000000' ; MARK as a color pixel. | |
| 1133 | |
| 1134 movwf TXREG | |
| 1135 call rs232_wait_tx ; wait for UART | |
| 1136 movff ds_pixel+1,TXREG | |
| 1137 call rs232_wait_tx ; wait for UART | |
| 1138 movff ds_pixel+0,TXREG | |
| 1139 call rs232_wait_tx ; wait for UART | |
| 1140 bra dump_screen_pixel_1 | |
| 1141 | |
| 1142 dump_screen_pixel_2: | |
| 1143 movff PRODH,ds_pixel+1 ; Save new pixel color | |
| 1144 movff PRODL,ds_pixel+0 | |
| 1145 movlw 1 | |
| 1146 movwf ds_count ; And set count=1. | |
| 1147 return | |
| 1148 | |
| 1149 dump_screen_pix_black: | |
| 1150 movlw .128 ; Max black pixel on a single byte. | |
| 1151 cpfsgt ds_count ; Skip if count > 128 | |
| 1152 movf ds_count,W ; W <- min(128,count) | |
| 1153 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1154 decf WREG ; Save as 0..127 | |
| 1155 dump_screen_pix_3: | |
| 1156 movwf TXREG | |
| 1157 call rs232_wait_tx | |
| 1158 bra dump_screen_pixel_1 ; More to dump ? | |
| 1159 | |
| 1160 dump_screen_pix_white: | |
| 1161 movlw .64 ; Max white pixel on a single byte. | |
| 1162 cpfsgt ds_count ; Skip if count > 64 | |
| 1163 movf ds_count,W ; W <- min(64,count) | |
| 1164 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1165 decf WREG ; Save as 0..63 | |
| 1166 iorlw b'11000000' ; MARK as a compressed white. | |
| 1167 bra dump_screen_pix_3 | |
| 1168 | |
| 1169 dump_screen_pixel_flush: | |
| 1170 clrf PRODH | |
| 1171 clrf PRODL | |
| 1172 rcall dump_screen_pixel_1 ; Send it | |
| 1173 dump_screen_pixel_reset: | |
| 1174 clrf ds_count ; But clear count. | |
| 1175 return | |
| 1176 | |
| 1177 end |