Mercurial > public > hwos_code
annotate src/tft.asm @ 246:f345a55c92e0
minor docu update
| author | heinrichsweikamp |
|---|---|
| date | Thu, 05 Mar 2015 10:36:56 +0100 |
| parents | 31088352ee32 |
| children | 653a3ab08062 |
| 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 | |
| 12 #include "ostc3.inc" | |
| 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 | |
| 316 ; Init through config table... | |
| 317 movlw LOW display0_config_table | |
| 318 movwf TBLPTRL | |
| 319 movlw HIGH display0_config_table | |
| 320 movwf TBLPTRH | |
| 321 movlw UPPER display0_config_table | |
| 322 movwf TBLPTRU | |
| 323 rcall display0_init_loop | |
| 324 | |
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325 Index_out 0x03 |
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326 btfsc flip_screen ; 180° rotation ? |
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327 bra TFT_boot2 ; Yes |
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328 Parameter_out 0x50, 0x20 |
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329 bra TFT_boot3 |
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330 TFT_boot2: |
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331 Parameter_out 0x50, 0x10 |
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332 TFT_boot3: |
| 0 | 333 Index_out 0x22 |
| 334 ; WAITMS d'81' ; 46 | |
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335 rcall TFT_ClearScreen |
| 0 | 336 Index_out 0x07 |
| 337 Parameter_out 0x01, 0x00 | |
| 338 return | |
| 339 | |
| 340 | |
| 341 display0_config_table: | |
| 342 ; Reg, Dat0, Dat1 or 0xFF,0x00,0x00 for end | |
| 343 db 0xA4,0x00,0x01,0xFF,.002,0x00 | |
| 344 db 0x09,0x00,0x01,0x92,0x04,0x00 | |
| 345 db 0x93,0x04,0x02,0x94,0x00,0x02 | |
| 346 db 0x07,0x00,0x00,0x10,0x04,0x30 | |
| 347 db 0x11,0x02,0x37,0x12,0x11,0x8D | |
| 348 db 0x13,0x11,0x00,0x01,0x01,0x00 | |
| 349 db 0x02,0x02,0x00,0x03,0x50,0x20 | |
| 350 db 0x0A,0x00,0x08,0x0D,0x00,0x00 | |
| 351 db 0x0E,0x00,0x30,0xFF,.151,0x00 | |
| 352 db 0x12,0x11,0xBD,0x20,0x00,0x00 | |
| 353 db 0x21,0x00,0x00,0x30,0x06,0x02 | |
| 354 db 0x31,0x56,0x0D,0x32,0x05,0x07 | |
| 355 db 0x33,0x06,0x09,0x34,0x00,0x00 | |
| 356 db 0x35,0x09,0x06,0x36,0x57,0x05 | |
| 357 db 0x37,0x0D,0x06,0x38,0x02,0x06 | |
| 358 db 0x39,0x00,0x00,0xFF,0x00,0x00 | |
| 359 | |
| 360 display0_init_loop: | |
| 361 TBLRD*+ | |
| 362 movlw 0xFF | |
| 363 cpfseq TABLAT | |
| 364 bra display0_config_write ; Write Config pair to Display | |
| 365 ; Delay ms or quit (return) | |
| 366 TBLRD*+ | |
| 367 tstfsz TABLAT ; End of config? | |
| 368 bra $+4 ; No | |
| 369 return ; Done. | |
| 370 movf TABLAT,W | |
| 371 call WAITMSX ; Wait WREG milliseconds | |
| 372 TBLRD*+ ; Dummy read (Third byte of delay command) | |
| 373 bra display0_init_loop ; Loop | |
| 374 | |
| 375 display0_config_write: ; With command in WREG | |
| 376 movf TABLAT,W | |
| 377 rcall TFT_CmdWrite ; Write command | |
| 378 TBLRD*+ ; Get config0 | |
| 379 movff TABLAT,PORTA | |
| 380 TBLRD*+ ; Get config1 | |
| 381 movf TABLAT,W | |
| 382 rcall TFT_DataWrite ; Write config | |
| 383 bra display0_init_loop ; Loop | |
| 384 | |
| 385 | |
| 386 ;============================================================================= | |
| 387 ; Smooth lighting-up of the display: | |
| 388 ; | |
| 389 ; Trashes: WREG, PRODL | |
| 390 ; Typical usage: | |
| 391 ; clrf CCPR1L ; Backlight off | |
| 392 ; [draw splash screen] | |
| 393 ; call TFT_DisplayFadeIn | |
| 394 ; | |
| 395 global TFT_Display_FadeIn | |
| 396 TFT_Display_FadeIn: | |
| 397 movlw CCP1CON_VALUE ; See ostc3.inc | |
| 398 movwf CCP1CON | |
| 399 bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! | |
| 400 clrf CCPR1L ; Backlight off - to be sure | |
| 401 movff max_CCPR1L,PRODL | |
| 402 TFT_Display_FadeIn_0: | |
| 403 incf CCPR1L,F ; Duty cycle | |
| 404 WAITMS d'2' | |
| 405 decfsz PRODL,F | |
| 406 bra TFT_Display_FadeIn_0 | |
| 407 bcf tft_is_dimming ; dimming done. | |
| 408 return | |
| 409 | |
| 410 ;============================================================================= | |
| 411 ; Smooth lighting-off of the display: | |
| 412 ; Trashes: WREG, PRODL | |
| 413 global TFT_Display_FadeOut | |
| 414 TFT_Display_FadeOut: | |
| 415 movff max_CCPR1L,PRODL | |
| 416 bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! | |
| 417 TFT_Display_FadeOut_0: | |
| 418 movff PRODL,CCPR1L ; Duty cycle | |
| 419 WAITMS d'1' | |
| 420 decfsz PRODL,F | |
| 421 bra TFT_Display_FadeOut_0 | |
| 422 clrf CCPR1L | |
| 423 return | |
| 424 | |
| 425 ;============================================================================= | |
| 426 | |
| 427 global box_std_block, box_black_block, box_color_block | |
| 428 | |
| 429 box_std_block: ; Use white color | |
| 430 setf WREG | |
| 431 bra box_common | |
| 432 box_black_block: ; Use black color | |
| 433 clrf WREG | |
| 434 box_common: | |
| 435 box_color_block: | |
| 436 rcall TFT_set_color | |
| 437 VARARGS_BEGIN | |
| 438 VARARGS_GET8 win_top | |
| 439 VARARGS_GET8 win_height | |
| 440 VARARGS_GET8 win_leftx2 | |
| 441 VARARGS_GET8 win_width | |
| 442 VARARGS_END | |
| 443 bra TFT_box | |
| 444 | |
| 445 ;----------------------------------------------------------------------------- | |
| 446 | |
| 447 global box_frame_std, box_frame_common, box_frame_color, box_frame_color16 | |
| 448 | |
| 449 box_frame_std: | |
| 450 setf WREG | |
| 451 rcall TFT_set_color | |
| 452 | |
| 453 box_frame_common: | |
| 454 VARARGS_BEGIN | |
| 455 VARARGS_GET8 win_top | |
| 456 VARARGS_GET8 win_height | |
| 457 VARARGS_GET8 win_leftx2 | |
| 458 VARARGS_GET8 win_width | |
| 459 VARARGS_END | |
| 460 bra TFT_frame | |
| 461 | |
| 462 box_frame_color: | |
| 463 rcall TFT_set_color | |
| 464 box_frame_color16: | |
| 465 bra box_frame_common | |
| 466 | |
| 467 ;============================================================================= | |
| 468 ; Init for half_pixel_write | |
| 469 ; Set column register on TFT device, and current color. | |
| 470 ; Inputs: win_leftx2 | |
| 471 ; Outputs: win_color:2 | |
| 472 ; Trashed: WREG, PROD | |
| 473 global init_pixel_write | |
| 474 init_pixel_write: | |
| 475 movff win_leftx2,WREG | |
| 476 mullw 2 | |
| 477 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 478 setf WREG | |
| 479 bra TFT_set_color | |
| 480 | |
| 481 ;----------------------------------------------------------------------------- | |
| 482 ; Writes two half-pixels at position (win_top,win_leftx2) | |
| 483 ; Inputs: win_leftx2, win_top, win_color:2 | |
| 484 ; Trashed: WREG, PROD | |
| 485 global pixel_write | |
| 486 pixel_write: | |
| 487 movff win_leftx2,WREG | |
| 488 mullw 2 ; win_leftx2 x 2 -> PRODH:PRODL | |
| 489 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 490 rcall half_pixel_write ; Write this half-one. | |
| 491 | |
| 492 movff win_leftx2,WREG ; Address of next one | |
| 493 mullw 2 | |
| 494 infsnz PRODL ; +1 | |
| 495 incf PRODH | |
| 496 rcall pixel_write_col320 | |
| 497 bra half_pixel_write ; Note: Cmd 0x20 is mandatory, because | |
| 498 ; of the autoincrement going vertical | |
| 499 | |
| 500 global pixel_write_col320 | |
| 501 pixel_write_col320: | |
| 151 | 502 btfss flip_screen ; 180° rotation? |
| 503 bra pixel_write_noflip_H ; No | |
| 504 | |
| 505 movf PRODL,W ; 16bits 319 - PROD --> PROD | |
| 506 sublw LOW(.319) ; 319-W --> W | |
| 507 movwf PRODL | |
| 508 movf PRODH,W | |
| 509 btfss STATUS,C ; Borrow = /CARRY | |
| 510 incf WREG | |
| 511 sublw HIGH(.319) | |
| 512 movwf PRODH | |
| 513 | |
| 514 pixel_write_noflip_H: | |
| 0 | 515 Index_out 0x21 ; Frame Memory Vertical Address |
| 516 bra TFT_DataWrite_PROD | |
| 517 | |
| 518 ;----------------------------------------------------------------------------- | |
| 519 ; Writes one half-pixel at position (win_top,win_leftx2). | |
| 520 ; Inputs: win_leftx2, win_top, win_color:2 | |
| 521 ; Trashed: WREG, PROD | |
| 522 global half_pixel_write | |
| 523 half_pixel_write: | |
| 524 movff win_top,WREG ; d'0' ... d'239' | |
| 525 ; Variant with Y position in WREG. | |
| 526 half_pixel_write_1: | |
| 151 | 527 btfss flip_screen ; 180° rotation? |
| 528 sublw .239 ; 239-Y --> Y | |
| 529 mullw 1 ; Copy row to PRODL (PRODH=0) | |
| 0 | 530 |
| 531 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 532 rcall TFT_DataWrite_PROD | |
| 533 | |
| 534 Index_out 0x22 ; Frame Memory Data Write start | |
| 535 RS_H ; Data | |
| 536 movff win_color1,PORTA ; Upper | |
| 537 movff win_color2,PORTH ; Lower | |
| 538 WR_L | |
| 539 WR_H ; Tick | |
| 540 return | |
| 541 | |
| 542 ;----------------------------------------------------------------------------- | |
| 543 ; Writes a vertical line of half-pixel at position (win_top,win_leftx2,win_height). | |
| 544 ; Inputs: win_leftx2, win_top, win_height, win_color:2 | |
| 545 ; Trashed: WREG, PROD, TABLAT, TBLPTRL | |
| 546 global half_vertical_line | |
| 547 half_vertical_line: | |
| 548 clrf TABLAT ; Loop index. | |
| 549 | |
| 550 half_vertical_line_loop: | |
| 551 movff win_leftx2,WREG ; Init X position. | |
| 552 mullw 2 | |
| 553 movf TABLAT,W ; Get loop index | |
| 554 andlw 1 ; Just low bit | |
| 555 xorwf PRODL,F ; And use it to jitter current X position | |
| 556 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 557 | |
| 558 movff win_height,WREG ; Index reached height (Bank0 read) ? | |
| 559 xorwf TABLAT,W | |
| 560 btfsc STATUS,Z ; Equals ? | |
| 561 return ; Yes: done. | |
| 562 movff win_top,WREG ; Y = top + index (Bank0 read) | |
| 563 addwf TABLAT,W | |
| 564 rcall half_pixel_write_1 | |
| 565 incf TABLAT,F ; index++ | |
| 566 bra half_vertical_line_loop | |
| 567 | |
| 568 ;----------------------------------------------------------------------------- | |
| 569 ; Writes a horizontal line of half-pixel at position (win_top,win_leftx2,win_width). | |
| 570 ; Inputs: win_leftx2, win_top, win_width, win_color:2 | |
| 571 ; Trashed: WREG, PROD, TABLAT, TBLPTRL | |
| 572 global half_horizontal_line | |
| 573 half_horizontal_line: | |
| 574 clrf TABLAT ; Loop index. | |
| 575 | |
| 576 half_horizontal_line_loop: | |
| 577 movff win_leftx2,WREG ; Init X position. | |
| 578 mullw 2 | |
| 579 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 580 movff win_width,WREG ; Index reached height (Bank0 read) ? | |
| 581 xorwf TABLAT,W | |
| 582 btfsc STATUS,Z ; Equals ? | |
| 583 return ; Yes: done. | |
| 584 movff win_top,WREG ; Y = top + index (Bank0 read) | |
| 585 addwf TABLAT,W | |
| 586 rcall half_pixel_write_1 | |
| 587 incf TABLAT,F ; index++ | |
| 588 bra half_horizontal_line_loop | |
| 589 | |
| 590 | |
| 591 ;----------------------------------------------------------------------------- | |
| 592 ; TFT Data Cmd via W | |
| 593 ; | |
| 594 global TFT_DataWrite_PROD | |
| 595 TFT_DataWrite_PROD: | |
| 596 ; RD_H ; Keep high | |
| 597 RS_H ; Data | |
| 598 movff PRODH,PORTA ; Move high byte to PORTA | |
| 599 movff PRODL,PORTH ; Move low byte to PORTH | |
| 600 WR_L | |
| 601 WR_H ; Tick | |
| 602 return | |
| 603 | |
| 604 TFT_DataRead_PROD: | |
| 605 Index_out 0x22 ; Frame Memory Data Read start | |
| 606 setf TRISA ; PortA as input. | |
| 607 setf TRISH ; PortH as input. | |
| 608 RS_H ; Data | |
| 609 WR_H ; Not write | |
| 610 RD_L ; Read! | |
| 611 nop | |
| 612 nop | |
| 613 nop | |
| 614 RD_H ; Tick | |
| 615 nop | |
| 616 RD_L ; Read! | |
| 617 nop | |
| 618 nop | |
| 619 nop | |
| 620 movff PORTA,PRODH | |
| 621 movff PORTH,PRODL | |
| 622 RD_H ; Tick | |
| 623 nop | |
| 624 clrf TRISA ; PortA as output | |
| 625 clrf TRISH ; PortH as output | |
| 626 return | |
| 627 | |
| 628 | |
| 629 | |
| 630 ;============================================================================= | |
| 631 ; Output TFT Window Address commands. | |
| 632 ; Inputs : win_top, win_leftx2, win_height, win_width. | |
| 633 ; Output : PortA/PortH commands. | |
| 634 ; Trashed: PROD | |
| 635 ; | |
| 636 global TFT_box_write | |
| 637 TFT_box_write: | |
| 638 movff win_leftx2,WREG ; Compute left = 2*leftx2 --> PROD | |
| 639 mullw 2 | |
| 640 | |
|
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641 global TFT_box_write_16bit_win_left |
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642 TFT_box_write_16bit_win_left: ; With column in PRODL:PRODH |
| 151 | 643 btfsc flip_screen ; 180° rotation ? |
| 644 bra DISP_box_flip_H ; Yes | |
| 645 | |
| 0 | 646 ;---- Normal horizontal window --------------------------------------- |
| 647 Index_out 0x52 ; Window Vertical Start Address | |
| 648 rcall TFT_DataWrite_PROD ; Output left | |
| 649 Index_out 0x21 ; Frame Memory Vertical Address | |
| 650 rcall TFT_DataWrite_PROD ; Output left | |
| 651 | |
| 652 movff win_width+0,WREG ; right = left + width - 1 | |
| 653 addwf PRODL,F | |
| 654 movff win_width+1,WREG | |
| 655 addwfc PRODH,F | |
| 656 decf PRODL,F ; decrement result | |
| 657 btfss STATUS,C | |
| 658 decf PRODH,F | |
| 659 | |
| 660 Index_out 0x53 ; Window Vertical End Address | |
| 661 rcall TFT_DataWrite_PROD | |
| 151 | 662 bra DISP_box_noflip_H |
| 0 | 663 |
| 151 | 664 ;---- Flipped horizontal window -------------------------------------- |
| 665 DISP_box_flip_H: | |
| 666 movf PRODL,W ; 16bits 319 - PROD --> PROD | |
| 667 sublw LOW(.319) ; 319-W --> W | |
| 668 movwf PRODL | |
| 669 movf PRODH,W | |
| 670 btfss STATUS,C ; Borrow = /CARRY | |
| 671 incf WREG | |
| 672 sublw HIGH(.319) | |
| 673 movwf PRODH | |
|
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674 |
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675 Index_out 0x53 ; Window Vertical Start Address |
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676 rcall TFT_DataWrite_PROD ; Output left |
| 151 | 677 Index_out 0x21 ; Frame Memory Vertical Address |
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678 rcall TFT_DataWrite_PROD ; Output left |
| 151 | 679 |
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680 movff win_width+0,WREG ; 16bits PROD - width --> PROD |
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681 subwf PRODL,F ; PRODL - WREG --> PRODL |
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682 movff win_width+1,WREG |
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683 subwfb PRODH,F |
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684 infsnz PRODL ; PROD+1 --> PROD |
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685 incf PRODH |
| 151 | 686 |
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687 Index_out 0x52 ; Window Vertical End Address |
| 151 | 688 rcall TFT_DataWrite_PROD |
| 689 | |
| 690 DISP_box_noflip_H: | |
| 691 btfss flip_screen ; 180° rotation ? | |
|
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692 bra TFT_box_noflip_V ; No. |
| 151 | 693 |
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694 ;---- Flipped vertical window ----------------------------------------- |
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695 movff win_top,PRODH ; top --> PRODH (first byte) |
| 151 | 696 movff win_height,WREG |
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697 addwf PRODH,W |
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698 decf WREG |
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699 movwf PRODL ; top+height-1 --> PRODL (second byte) |
| 151 | 700 |
| 701 Index_out 0x50 ; Window Horizontal Start Address | |
| 702 movf PRODH,W | |
| 703 rcall TFT_DataWrite ; Lower (and tick) | |
| 704 | |
| 705 Index_out 0x51 ; Window Horizontal End Address | |
| 706 movf PRODL,W | |
| 707 rcall TFT_DataWrite ; Lower (and tick) | |
| 708 | |
| 709 Index_out 0x20 ; Frame Memory Horizontal Address | |
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710 movf PRODH,W |
| 151 | 711 rcall TFT_DataWrite ; Lower (and tick) |
| 712 return | |
| 713 | |
| 714 | |
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715 TFT_box_noflip_V: |
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716 ;---- Normal vertical window ---------------------------------------- |
| 0 | 717 movff win_top,PRODL |
| 718 movff win_height,WREG | |
| 719 addwf PRODL,W | |
| 720 sublw .240 ; 240 - top - height | |
| 721 movwf PRODH ; First byte | |
| 722 | |
| 723 movf PRODL,W | |
| 151 | 724 sublw .239 ; 239-top |
| 0 | 725 movwf PRODL ; --> second byte. |
| 726 | |
| 727 Index_out 0x50 ; Window Horizontal Start Address | |
| 728 movf PRODH,W | |
| 729 rcall TFT_DataWrite ; Lower (and tick) | |
| 730 | |
| 731 Index_out 0x51 ; Window Horizontal End Address | |
| 732 movf PRODL,W | |
| 733 rcall TFT_DataWrite ; Lower (and tick) | |
| 734 | |
| 735 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 736 movf PRODL,W | |
| 737 rcall TFT_DataWrite ; Lower (and tick) | |
| 738 return | |
| 739 | |
| 740 | |
| 741 ;============================================================================= | |
| 742 ; TFT_frame : draw a frame around current box with current color. | |
| 743 ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 | |
| 744 ; Outputs: (none) | |
| 745 ; Trashed: WREG, PROD, aa_start:2, aa_end:2 | |
| 746 global TFT_frame | |
| 747 TFT_frame: | |
| 748 movff win_top,save_top ; Backup everything. | |
| 749 movff win_height,save_height | |
| 750 movff win_leftx2,save_left | |
| 751 movff win_width,save_width | |
| 752 | |
| 753 ;---- TOP line ----------------------------------------------------------- | |
| 754 movlw 1 ; row ~ height=1 | |
| 755 movff WREG,win_height | |
| 756 rcall TFT_box | |
| 757 | |
| 758 ;---- BOTTOM line -------------------------------------------------------- | |
| 759 movff save_top,PRODL ; Get back top, | |
| 760 movff save_height,WREG ; and height | |
| 761 addwf PRODL,W ; top+height | |
| 762 decf WREG ; top+height-1 | |
| 763 movff WREG,win_top ; top+height-1 --> top | |
| 764 rcall TFT_box | |
| 765 | |
| 766 ;---- LEFT column -------------------------------------------------------- | |
| 767 movff save_top,win_top ; Restore top/height. | |
| 768 movff save_height,win_height | |
| 769 movlw 1 ; column ~ width=1 | |
| 770 movff WREG,win_width | |
| 771 rcall TFT_box | |
| 772 | |
| 773 ;---- RIGHT column ------------------------------------------------------- | |
| 774 movff save_left,WREG | |
| 775 movff save_width,PRODL | |
| 776 addwf PRODL,W | |
| 777 decf WREG | |
| 778 movff WREG,win_leftx2 | |
| 779 rcall TFT_box | |
| 780 | |
| 781 ;---- Restore everything ------------------------------------------------- | |
| 782 movff save_left,win_leftx2 | |
| 783 movff save_width,win_width | |
| 784 return | |
| 785 | |
| 786 ;============================================================================= | |
| 787 ; TFT_box : fills current box with current color. | |
| 788 ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 | |
| 789 ; Outputs: (none) | |
| 790 ; Trashed: WREG, PROD | |
| 791 global TFT_box | |
| 792 | |
| 793 TFT_box: | |
| 794 ;---- Define Window ------------------------------------------------------ | |
| 795 movf win_width,W | |
| 796 bcf STATUS,C | |
| 797 rlcf WREG | |
| 798 movwf win_width+0 | |
| 799 movlw 0 | |
| 800 rlcf WREG | |
| 801 movwf win_width+1 | |
| 83 | 802 rcall TFT_box_write ; Setup box |
| 0 | 803 |
| 83 | 804 global TFT_box_16bit_win_left |
| 805 TFT_box_16bit_win_left: | |
| 0 | 806 rrcf win_width+1,W ; width /= 2 |
| 807 rrcf win_width+0,W | |
| 808 movwf win_width | |
| 809 | |
| 810 ;---- Fill Window -------------------------------------------------------- | |
| 811 Index_out 0x22 ; Frame Memory Data Write start | |
| 812 | |
| 813 clrf PRODH ; Column counter. | |
| 814 RS_H ; Data | |
| 815 | |
| 816 TFT_box2: ; Loop height times | |
| 817 movff win_height,PRODL | |
| 818 | |
| 819 TFT_box3: ; loop width times | |
| 820 movff win_color1,PORTA ; Upper | |
| 821 movff win_color2,PORTH ; Lower | |
| 822 WR_L | |
| 823 WR_H ; Tick | |
| 824 | |
| 825 movff win_color1,PORTA ; Upper | |
| 826 movff win_color2,PORTH ; Lower | |
| 827 WR_L | |
| 828 WR_H ; Tick | |
| 829 | |
| 830 decfsz PRODL,F ; row loop finished ? | |
| 831 bra TFT_box3 ; No: continue. | |
| 832 | |
| 833 incf PRODH,F ; column count ++ | |
| 834 | |
| 835 movff win_bargraph,WREG ; current column == bargraph ? | |
| 836 cpfseq PRODH | |
| 837 bra TFT_box4 ; No: just loop. | |
| 838 | |
| 839 clrf WREG ; Yes: switch to black | |
| 840 movff WREG,win_color1 | |
| 841 movff WREG,win_color2 | |
| 842 TFT_box4: | |
| 843 | |
| 844 movff win_width+0,WREG ; compare ? | |
| 845 xorwf PRODH,W | |
| 846 bnz TFT_box2 ; Loop not finished. | |
| 847 | |
| 848 movlw 0x00 ; NOP, to stop window mode | |
| 849 rcall TFT_CmdWrite | |
| 850 | |
| 851 setf WREG ; Reset bargraph mode... | |
| 852 movff WREG,win_bargraph | |
| 853 | |
| 854 return | |
| 855 | |
| 856 ;============================================================================= | |
| 857 ;Converts 8Bit RGB b'RRRGGGBB' into 16Bit RGB b'RRRRRGGGGGGBBBBB' | |
| 858 global TFT_set_color | |
| 859 | |
| 860 TFT_set_color: | |
| 861 movwf tft_temp1 ; Get 8Bit RGB b'RRRGGGBB' | |
| 862 movwf tft_temp2 ; Copy | |
| 863 | |
| 864 ; Mask Bit 7,6,5,4,3,2 | |
| 865 movlw b'00000011' | |
| 866 andwf tft_temp2,F | |
| 867 | |
| 868 movlw b'00000000' | |
| 869 dcfsnz tft_temp2,F | |
| 870 movlw b'01010000' | |
| 871 dcfsnz tft_temp2,F | |
| 872 movlw b'10100000' | |
| 873 dcfsnz tft_temp2,F | |
| 874 movlw b'11111000' | |
| 875 movwf tft_temp3 ; Blue done. | |
| 876 | |
| 877 movff tft_temp1, tft_temp2 ; Copy | |
| 878 ; Mask Bit 7,6,5,1,0 | |
| 879 movlw b'00011100' | |
| 880 andwf tft_temp2,F | |
| 881 rrncf tft_temp2,F | |
| 882 rrncf tft_temp2,F | |
| 883 | |
| 884 movlw b'00000000' | |
| 885 dcfsnz tft_temp2,F | |
| 886 movlw b'00000100' | |
| 887 dcfsnz tft_temp2,F | |
| 888 movlw b'00001000' | |
| 889 dcfsnz tft_temp2,F | |
| 890 movlw b'00001100' | |
| 891 dcfsnz tft_temp2,F | |
| 892 movlw b'00010000' | |
| 893 dcfsnz tft_temp2,F | |
| 894 movlw b'00010100' | |
| 895 dcfsnz tft_temp2,F | |
| 896 movlw b'00100000' | |
| 897 dcfsnz tft_temp2,F | |
| 898 movlw b'00111111' | |
| 899 movwf tft_temp4 | |
| 900 | |
| 901 rrcf tft_temp4,F | |
| 902 rrcf tft_temp3,F | |
| 903 | |
| 904 rrcf tft_temp4,F | |
| 905 rrcf tft_temp3,F | |
| 906 | |
| 907 rrcf tft_temp4,F | |
| 908 rrcf tft_temp3,F ; tft_temp3 (b'GGGBBBBB') done. | |
| 909 | |
| 910 movff tft_temp1, tft_temp2 ; Copy | |
| 911 clrf tft_temp1 | |
| 912 | |
| 913 rrcf tft_temp4,F | |
| 914 rrcf tft_temp1,F | |
| 915 | |
| 916 rrcf tft_temp4,F | |
| 917 rrcf tft_temp1,F | |
| 918 | |
| 919 rrcf tft_temp4,F | |
| 920 rrcf tft_temp1,F ; Green done. | |
| 921 | |
| 922 ; Mask Bit 4,3,2,1,0 | |
| 923 movlw b'11100000' | |
| 924 andwf tft_temp2,F | |
| 925 | |
| 926 rrncf tft_temp2,F | |
| 927 rrncf tft_temp2,F | |
| 928 rrncf tft_temp2,F | |
| 929 rrncf tft_temp2,F | |
| 930 rrncf tft_temp2,F | |
| 931 | |
| 932 movlw b'00000000' | |
| 933 dcfsnz tft_temp2,F | |
| 934 movlw b'00000100' | |
| 935 dcfsnz tft_temp2,F | |
| 936 movlw b'00001000' | |
| 937 dcfsnz tft_temp2,F | |
| 938 movlw b'00001100' | |
| 939 dcfsnz tft_temp2,F | |
| 940 movlw b'00010000' | |
| 941 dcfsnz tft_temp2,F | |
| 942 movlw b'00010100' | |
| 943 dcfsnz tft_temp2,F | |
| 944 movlw b'00100000' | |
| 945 dcfsnz tft_temp2,F | |
| 946 movlw b'00111111' | |
| 947 movwf tft_temp4 | |
| 948 | |
| 949 rrcf tft_temp4,F | |
| 950 rrcf tft_temp1,F | |
| 951 | |
| 952 rrcf tft_temp4,F | |
| 953 rrcf tft_temp1,F | |
| 954 | |
| 955 rrcf tft_temp4,F | |
| 956 rrcf tft_temp1,F | |
| 957 | |
| 958 rrcf tft_temp4,F | |
| 959 rrcf tft_temp1,F | |
| 960 | |
| 961 rrcf tft_temp4,F | |
| 962 rrcf tft_temp1,F ; Red done. | |
| 963 | |
| 964 movff tft_temp1,win_color1 | |
| 965 movff tft_temp3,win_color2 ; Set Bank0 Color registers... | |
| 966 return | |
| 967 | |
| 968 ;============================================================================= | |
| 969 ; Dump screen contents to the UART | |
| 970 | |
| 971 global TFT_dump_screen | |
| 972 TFT_dump_screen: | |
| 973 bsf no_sensor_int | |
| 974 movlw 'l' | |
| 975 movwf TXREG ; Send command echo. | |
| 976 call rs232_wait_tx ; wait for UART | |
| 977 ;---- Send DISPLAY box command for the full screen window ------------------- | |
| 978 Index_out 0x50 ; Window Horizontal Start Address | |
| 979 Parameter_out 0x00, 0x00 ; 0-239 | |
| 980 Index_out 0x51 ; Window Horizontal End Address | |
| 981 Parameter_out 0x00, 0xEF ; 0-239 | |
| 982 Index_out 0x52 ; Window Vertical Start Address | |
| 983 Parameter_out 0x00, 0x00 ; 0-319 | |
| 984 Index_out 0x53 ; Window Vertical End Address | |
| 985 Parameter_out 0x01, 0x3F ; 0-319 | |
| 986 | |
| 987 clrf ds_column | |
| 988 rcall dump_screen_pixel_reset | |
| 989 dump_screen_1: | |
| 990 btg LEDr ; LED activity toggle | |
| 991 ; Dump even column | |
| 992 movlw .240 ; 240 lines, once. | |
| 993 movwf ds_line | |
| 994 dump_screen_2: | |
| 995 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 996 movff ds_line,WREG ; d'0' ... d'239' | |
| 997 mullw 1 ; Copy row to PRODH:L | |
| 998 rcall TFT_DataWrite_PROD | |
| 999 | |
| 1000 movff ds_column,WREG ; Init X position. | |
| 1001 mullw 2 | |
| 1002 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 1003 | |
| 1004 rcall TFT_DataRead_PROD ; read pixel | |
| 1005 rcall dump_screen_pixel | |
| 1006 | |
| 1007 decfsz ds_line,F | |
| 1008 bra dump_screen_2 | |
| 1009 rcall dump_screen_pixel_flush | |
| 1010 | |
| 1011 ; Dump odd column | |
| 1012 movlw .240 ; 240 lines, twice. | |
| 1013 movwf ds_line | |
| 1014 dump_screen_3: | |
| 1015 Index_out 0x20 ; Frame Memory Horizontal Address | |
| 1016 movff ds_line,WREG ; d'0' ... d'239' | |
| 1017 mullw 1 ; Copy row to PRODH:L | |
| 1018 rcall TFT_DataWrite_PROD | |
| 1019 | |
| 1020 movff ds_column,WREG ; Init X position. | |
| 1021 mullw 2 | |
| 1022 movlw .1 | |
| 1023 addwf PRODL,F | |
| 1024 movlw 0 | |
| 1025 addwfc PRODH,F ; +1 | |
| 1026 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) | |
| 1027 | |
| 1028 rcall TFT_DataRead_PROD ; read pixel | |
| 1029 rcall dump_screen_pixel | |
| 1030 | |
| 1031 decfsz ds_line,F | |
| 1032 bra dump_screen_3 | |
| 1033 rcall dump_screen_pixel_flush | |
| 1034 | |
| 1035 incf ds_column,F | |
| 1036 movlw .160 | |
| 1037 cpfseq ds_column | |
| 1038 bra dump_screen_1 | |
| 1039 | |
| 1040 bcf no_sensor_int | |
| 1041 clrf RCREG1 ; Clear receive buffer | |
| 1042 bcf RCSTA1,CREN ; Clear receiver status | |
| 1043 bsf RCSTA1,CREN | |
| 1044 bsf enable_screen_dumps ; =1: Ignore vin_usb, wait for "l" command (Screen dump) | |
| 1045 return | |
| 1046 | |
| 1047 | |
| 1048 ;============================================================================= | |
| 1049 ; Pixel compression | |
| 1050 ; | |
| 1051 ; Input: PRODH:L = pixel. | |
| 1052 ; Output: Compressed stream on output. | |
| 1053 ; Compressed format: | |
| 1054 ; 0ccccccc : BLACK pixel, repeated ccccccc+1 times (1..128). | |
| 1055 ; 11cccccc : WHITE pixel, repeated cccccc+1 times (1..64). | |
| 1056 ; 10cccccc HIGH LOW : color pixel (H:L) repeated ccccc+1 times (1..64). | |
| 1057 ; | |
| 1058 dump_screen_pixel: | |
| 1059 movf PRODH,W ; Compare pixel-high | |
| 1060 xorwf ds_pixel+1,W | |
| 1061 bnz dump_screen_pixel_1 ; Different -> dump. | |
| 1062 | |
| 1063 movf PRODL,W ; Compare pixel-low | |
| 1064 xorwf ds_pixel+0,W | |
| 1065 bnz dump_screen_pixel_1 ; Different -> dump. | |
| 1066 | |
| 1067 incf ds_count,F ; Same color: just increment. | |
| 1068 return | |
| 1069 | |
| 1070 dump_screen_pixel_1: ; Send (pixel,count) tuple | |
| 1071 movf ds_count,W ; Is count zero ? | |
| 1072 bz dump_screen_pixel_2 ; Yes: skip sending. | |
| 1073 | |
| 1074 movf ds_pixel+1,W ; This is a BLACK pixel ? | |
| 1075 iorwf ds_pixel+0,W | |
| 1076 bz dump_screen_pix_black ; YES. | |
| 1077 | |
| 1078 movf ds_pixel+1,W ; This is a white pixel ? | |
| 1079 andwf ds_pixel+0,W | |
| 1080 incf WREG | |
| 1081 bz dump_screen_pix_white ; YES. | |
| 1082 | |
| 1083 ; No: write the pixel itself... | |
| 1084 movlw .64 ; Max color pixel on a single byte. | |
| 1085 cpfsgt ds_count ; Skip if count > 64 | |
| 1086 movf ds_count,W ; W <- min(64,count) | |
| 1087 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1088 decf WREG ; Save as 0..63 | |
| 1089 iorlw b'10000000' ; MARK as a color pixel. | |
| 1090 | |
| 1091 movwf TXREG | |
| 1092 call rs232_wait_tx ; wait for UART | |
| 1093 movff ds_pixel+1,TXREG | |
| 1094 call rs232_wait_tx ; wait for UART | |
| 1095 movff ds_pixel+0,TXREG | |
| 1096 call rs232_wait_tx ; wait for UART | |
| 1097 bra dump_screen_pixel_1 | |
| 1098 | |
| 1099 dump_screen_pixel_2: | |
| 1100 movff PRODH,ds_pixel+1 ; Save new pixel color | |
| 1101 movff PRODL,ds_pixel+0 | |
| 1102 movlw 1 | |
| 1103 movwf ds_count ; And set count=1. | |
| 1104 return | |
| 1105 | |
| 1106 dump_screen_pix_black: | |
| 1107 movlw .128 ; Max black pixel on a single byte. | |
| 1108 cpfsgt ds_count ; Skip if count > 128 | |
| 1109 movf ds_count,W ; W <- min(128,count) | |
| 1110 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1111 decf WREG ; Save as 0..127 | |
| 1112 dump_screen_pix_3: | |
| 1113 movwf TXREG | |
| 1114 call rs232_wait_tx | |
| 1115 bra dump_screen_pixel_1 ; More to dump ? | |
| 1116 | |
| 1117 dump_screen_pix_white: | |
| 1118 movlw .64 ; Max white pixel on a single byte. | |
| 1119 cpfsgt ds_count ; Skip if count > 64 | |
| 1120 movf ds_count,W ; W <- min(64,count) | |
| 1121 subwf ds_count,F ; ds_count <- ds_count-W | |
| 1122 decf WREG ; Save as 0..63 | |
| 1123 iorlw b'11000000' ; MARK as a compressed white. | |
| 1124 bra dump_screen_pix_3 | |
| 1125 | |
| 1126 dump_screen_pixel_flush: | |
| 1127 clrf PRODH | |
| 1128 clrf PRODL | |
| 1129 rcall dump_screen_pixel_1 ; Send it | |
| 1130 dump_screen_pixel_reset: | |
| 1131 clrf ds_count ; But clear count. | |
| 1132 return | |
| 1133 | |
| 1134 end |