Mercurial > public > hwos_code
view src/tft.asm @ 229:e1e5876bd777
minor cleanup
| author | mh@mh-THINK |
|---|---|
| date | Wed, 18 Feb 2015 23:07:04 +0100 |
| parents | 31088352ee32 |
| children | 653a3ab08062 |
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;============================================================================= ; ; File tft.asm ; ; Managing the TFT screen ; ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. ;============================================================================= ; HISTORY ; 2011-05-24 : [jDG] Cleanups from initial Matthias code. #include "ostc3.inc" #include "wait.inc" #include "varargs.inc" #include "external_flash.inc" #include "tft_outputs.inc" #include "eeprom_rs232.inc" ;============================================================================= ; TFT_frame needs to backup coordinates. CBLOCK tmp save_top save_height save_left save_width ds_line ; Current line (0..239). ds_column ; Current columnx2 (0..159) ds_pixel:2 ; Current pixel color. ds_count ; Repetition count. ENDC ;============================================================================= ; Basic bit-level macros RD_H macro bsf tft_rd,0 endm RD_L macro bcf tft_rd,0 endm RS_H macro bsf tft_rs,0 endm RS_L macro bcf tft_rs,0 endm NCS_H macro bsf tft_cs,0 endm NCS_L macro bcf tft_cs,0 endm WR_H macro bsf tft_nwr,0 endm WR_L macro bcf tft_nwr,0 endm ;============================================================================= ; Byte-leve macros ; Index_out macro low_b movlw low_b rcall TFT_CmdWrite endm Parameter_out macro high_b, low_b movlw high_b movwf PORTA ; Upper movlw low_b rcall TFT_DataWrite endm basic CODE ; ; ;;============================================================================= ;; TFT_write_flash_image ;; ;; Inputs: FSR2 = EEPROM address / 256 ;; win_left, win_top : imagte CENTER position ;; Outputs: win_height, win_width. ;; image copyed on screen. ;; Trashed: PROD, hi, lo ;; ; global TFT_write_flash_image ;TFT_write_flash_image: ; ; Get back the full 24bit EEPROM address ; clrf ext_flash_address+0 ; movff FSR2L,ext_flash_address+1 ; movf FSR2H,W ; iorlw 0x30 ; movwf ext_flash_address+2 ; ; ; Read header: width and height ; global TFT_write_flash_image_addr ;TFT_write_flash_image_addr: ; call ext_flash_read_block_start ; movff SSP2BUF,win_width+0 ; movwf SSP2BUF ; Write to buffer to initiate new read ; btfss SSP2STAT, BF ; Next byte ready ? ; bra $-2 ; NO: wait... ; movff SSP2BUF,win_width+1 ; movwf SSP2BUF ; Write to buffer to initiate new read ; btfss SSP2STAT, BF ; Next byte ready ? ; bra $-2 ; NO: wait... ; movff SSP2BUF,win_height ; movwf SSP2BUF ; Write to buffer to initiate new read ; btfss SSP2STAT, BF ; Next byte ready ? ; bra $-2 ; NO: wait... ; movff SSP2BUF,WREG ; drop 4th byte. ; movwf SSP2BUF ; Write to buffer to initiate new read ; btfss SSP2STAT, BF ; Next byte ready ? ; bra $-2 ; NO: wait... ; ; ; Sanity check on header to avoid badly uploaded images. ; iorwf WREG ; Check height < 256 ; bnz TFT_write_flash_image_failed ; movf win_width+1,W ; Check width < 512 ; andlw 0xFE ; bnz TFT_write_flash_image_failed ; ; ; Center image on win_top, win_left values ; bcf STATUS,C ; Clear carry ; rrcf win_height,W ; And get height/2 ; subwf win_top,F ; top -= height/2 ; rrcf win_width+1,W ; Get 9th bit into carry ; rrcf win_width+0,W ; Get width/2 (in 0..320 range) ; bcf STATUS,C ; rrcf WREG,W ; Get width/2 in 0..160 range ; subwf win_leftx2,F ; left -= width/2 ; ; rcall TFT_box_write ; Inputs : win_top, win_leftx2, win_height, win_width(in 1..320 range) ; ; ; Compute number of pixels to move (result on 17 bits !) ; clrf TBLPTRU ; movf win_width+0,W ; mulwf win_height ; Result in PRODL:H ; movf win_width+1,W ; bz TFT_write_flash_image_1 ; width > 8bits ? ; movf win_height,W ; YES: add extra ; addwf PRODH,F ; rlcf TBLPTRU ; And carry into upper register. ;TFT_write_flash_image_1: ; incf PRODH,F ; Pre-condition nested loops ; incf TBLPTRU,F ; ; ; Write pixels ; Index_out 0x22 ; Frame Memory Data Write start ; RS_H ; Data ; ;TFT_write_flash_image_loop: ; btfss SSP2STAT, BF ; Buffer full? ; bra $-2 ; NO: wait... ; movff SSP2BUF,PORTH ; Read lo ; movwf SSP2BUF ; Write to buffer to initiate new read ; ; btfss SSP2STAT, BF ; Buffer full? ; bra $-2 ; NO: wait... ; movff SSP2BUF,PORTA ; And read hi ; movwf SSP2BUF ; Write to buffer to initiate new read ; WR_L ; WR_H ; Write 1 Pixel ; ; decfsz PRODL,F ; bra TFT_write_flash_image_loop ; decfsz PRODH,F ; bra TFT_write_flash_image_loop ; decfsz TBLPTRU,F ; bra TFT_write_flash_image_loop ; ; btfss SSP2STAT, BF ; Buffer full? ; bra $-2 ; No, wait ; movf SSP2BUF,W ; Read dummy byte ; ; bsf flash_ncs ; CS=1 ; movlw 0x00 ; NOP, to stop window mode ; bra TFT_CmdWrite ; This routine "returns" ; ; ;---- Draw a 4x4 red square in place of missing images... ;TFT_write_flash_image_failed: ; movlw -1 ; addwf win_leftx2,F ; movlw -2 ; addwf win_top,F ; movlw 2 ; movwf win_width+0 ; clrf win_width+1 ; movlw 4 ; movwf win_height ; movlw color_red ; rcall TFT_set_color ; goto TFT_box ; ;;============================================================================= ; global TFT_CmdWrite TFT_CmdWrite: RS_L ; Command clrf PORTA ; Upper movwf PORTH ; Lower WR_L WR_H ; Tick return; global TFT_DataWrite TFT_DataWrite: RS_H ; Data movwf PORTH ; Lower WR_L WR_H ; Tick return ;============================================================================= ; global TFT_ClearScreen TFT_ClearScreen: Index_out 0x50 ; Window Horizontal Start Address Parameter_out 0x00, 0x00 ; 0-239 Index_out 0x51 ; Window Horizontal End Address Parameter_out 0x00, 0xEF ; 0-239 Index_out 0x52 ; Window Vertical Start Address Parameter_out 0x00, 0x00 ; 0-319 Index_out 0x53 ; Window Vertical End Address Parameter_out 0x01, 0x3F ; 0-319 Index_out 0x20 ; Frame Memory Horizontal Address Parameter_out 0x00, 0x00 ; 0-239 Index_out 0x21 ; Frame Memory Vertical Address Parameter_out 0x01, 0x3F ; 0-319 Index_out 0x22 ; Frame Memory Data Write start RD_H ; Not Read RS_H ; Data NCS_L ; Not CS clrf PORTH ; Data Lower movlw d'10' movwf tft_temp3 TFT_ClearScreen2: movlw d'30' movwf tft_temp2 TFT_ClearScreen3: clrf tft_temp1 ; 30*10*256=76800 Pixels -> Clear complete 240*320 TFT_ClearScreen4: WR_L WR_H ; Tick decfsz tft_temp1,F bra TFT_ClearScreen4 decfsz tft_temp2,F bra TFT_ClearScreen3 decfsz tft_temp3,F bra TFT_ClearScreen2 return ;============================================================================= ; global TFT_DisplayOff TFT_DisplayOff: clrf CCPR1L ; PWM OFF clrf PORTA clrf PORTH RD_L ; LOW nop RS_L ; LOW bcf tft_nwr nop bcf tft_cs nop bcf tft_nreset WAITMS d'1' bsf tft_power ; inverted... bcf lightsen_power ; power-down light sensor return ; ----------------------------- ; TFT boot ; ----------------------------- global TFT_boot TFT_boot: clrf PORTA clrf PORTH RD_L ; LOW bcf tft_nwr nop bcf tft_cs nop bcf tft_nreset WAITMS d'1' bcf tft_power ; inverted... WAITMS d'1' RD_H ; Keep high WR_H ; NCS_L ; Not CS WAITMS d'2' bsf tft_nreset WAITMS d'150' bsf lightsen_power ; Supply power to light sensor ; Data Transfer Synchronization Parameter_out 0x00, 0x00 Parameter_out 0x00, 0x00 ; Init through config table... movlw LOW display0_config_table movwf TBLPTRL movlw HIGH display0_config_table movwf TBLPTRH movlw UPPER display0_config_table movwf TBLPTRU rcall display0_init_loop Index_out 0x03 btfsc flip_screen ; 180° rotation ? bra TFT_boot2 ; Yes Parameter_out 0x50, 0x20 bra TFT_boot3 TFT_boot2: Parameter_out 0x50, 0x10 TFT_boot3: Index_out 0x22 ; WAITMS d'81' ; 46 rcall TFT_ClearScreen Index_out 0x07 Parameter_out 0x01, 0x00 return display0_config_table: ; Reg, Dat0, Dat1 or 0xFF,0x00,0x00 for end db 0xA4,0x00,0x01,0xFF,.002,0x00 db 0x09,0x00,0x01,0x92,0x04,0x00 db 0x93,0x04,0x02,0x94,0x00,0x02 db 0x07,0x00,0x00,0x10,0x04,0x30 db 0x11,0x02,0x37,0x12,0x11,0x8D db 0x13,0x11,0x00,0x01,0x01,0x00 db 0x02,0x02,0x00,0x03,0x50,0x20 db 0x0A,0x00,0x08,0x0D,0x00,0x00 db 0x0E,0x00,0x30,0xFF,.151,0x00 db 0x12,0x11,0xBD,0x20,0x00,0x00 db 0x21,0x00,0x00,0x30,0x06,0x02 db 0x31,0x56,0x0D,0x32,0x05,0x07 db 0x33,0x06,0x09,0x34,0x00,0x00 db 0x35,0x09,0x06,0x36,0x57,0x05 db 0x37,0x0D,0x06,0x38,0x02,0x06 db 0x39,0x00,0x00,0xFF,0x00,0x00 display0_init_loop: TBLRD*+ movlw 0xFF cpfseq TABLAT bra display0_config_write ; Write Config pair to Display ; Delay ms or quit (return) TBLRD*+ tstfsz TABLAT ; End of config? bra $+4 ; No return ; Done. movf TABLAT,W call WAITMSX ; Wait WREG milliseconds TBLRD*+ ; Dummy read (Third byte of delay command) bra display0_init_loop ; Loop display0_config_write: ; With command in WREG movf TABLAT,W rcall TFT_CmdWrite ; Write command TBLRD*+ ; Get config0 movff TABLAT,PORTA TBLRD*+ ; Get config1 movf TABLAT,W rcall TFT_DataWrite ; Write config bra display0_init_loop ; Loop ;============================================================================= ; Smooth lighting-up of the display: ; ; Trashes: WREG, PRODL ; Typical usage: ; clrf CCPR1L ; Backlight off ; [draw splash screen] ; call TFT_DisplayFadeIn ; global TFT_Display_FadeIn TFT_Display_FadeIn: movlw CCP1CON_VALUE ; See ostc3.inc movwf CCP1CON bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! clrf CCPR1L ; Backlight off - to be sure movff max_CCPR1L,PRODL TFT_Display_FadeIn_0: incf CCPR1L,F ; Duty cycle WAITMS d'2' decfsz PRODL,F bra TFT_Display_FadeIn_0 bcf tft_is_dimming ; dimming done. return ;============================================================================= ; Smooth lighting-off of the display: ; Trashes: WREG, PRODL global TFT_Display_FadeOut TFT_Display_FadeOut: movff max_CCPR1L,PRODL bsf tft_is_dimming ; TFT is dimming, ignore ambient sensor! TFT_Display_FadeOut_0: movff PRODL,CCPR1L ; Duty cycle WAITMS d'1' decfsz PRODL,F bra TFT_Display_FadeOut_0 clrf CCPR1L return ;============================================================================= global box_std_block, box_black_block, box_color_block box_std_block: ; Use white color setf WREG bra box_common box_black_block: ; Use black color clrf WREG box_common: box_color_block: rcall TFT_set_color VARARGS_BEGIN VARARGS_GET8 win_top VARARGS_GET8 win_height VARARGS_GET8 win_leftx2 VARARGS_GET8 win_width VARARGS_END bra TFT_box ;----------------------------------------------------------------------------- global box_frame_std, box_frame_common, box_frame_color, box_frame_color16 box_frame_std: setf WREG rcall TFT_set_color box_frame_common: VARARGS_BEGIN VARARGS_GET8 win_top VARARGS_GET8 win_height VARARGS_GET8 win_leftx2 VARARGS_GET8 win_width VARARGS_END bra TFT_frame box_frame_color: rcall TFT_set_color box_frame_color16: bra box_frame_common ;============================================================================= ; Init for half_pixel_write ; Set column register on TFT device, and current color. ; Inputs: win_leftx2 ; Outputs: win_color:2 ; Trashed: WREG, PROD global init_pixel_write init_pixel_write: movff win_leftx2,WREG mullw 2 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) setf WREG bra TFT_set_color ;----------------------------------------------------------------------------- ; Writes two half-pixels at position (win_top,win_leftx2) ; Inputs: win_leftx2, win_top, win_color:2 ; Trashed: WREG, PROD global pixel_write pixel_write: movff win_leftx2,WREG mullw 2 ; win_leftx2 x 2 -> PRODH:PRODL rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) rcall half_pixel_write ; Write this half-one. movff win_leftx2,WREG ; Address of next one mullw 2 infsnz PRODL ; +1 incf PRODH rcall pixel_write_col320 bra half_pixel_write ; Note: Cmd 0x20 is mandatory, because ; of the autoincrement going vertical global pixel_write_col320 pixel_write_col320: btfss flip_screen ; 180° rotation? bra pixel_write_noflip_H ; No movf PRODL,W ; 16bits 319 - PROD --> PROD sublw LOW(.319) ; 319-W --> W movwf PRODL movf PRODH,W btfss STATUS,C ; Borrow = /CARRY incf WREG sublw HIGH(.319) movwf PRODH pixel_write_noflip_H: Index_out 0x21 ; Frame Memory Vertical Address bra TFT_DataWrite_PROD ;----------------------------------------------------------------------------- ; Writes one half-pixel at position (win_top,win_leftx2). ; Inputs: win_leftx2, win_top, win_color:2 ; Trashed: WREG, PROD global half_pixel_write half_pixel_write: movff win_top,WREG ; d'0' ... d'239' ; Variant with Y position in WREG. half_pixel_write_1: btfss flip_screen ; 180° rotation? sublw .239 ; 239-Y --> Y mullw 1 ; Copy row to PRODL (PRODH=0) Index_out 0x20 ; Frame Memory Horizontal Address rcall TFT_DataWrite_PROD Index_out 0x22 ; Frame Memory Data Write start RS_H ; Data movff win_color1,PORTA ; Upper movff win_color2,PORTH ; Lower WR_L WR_H ; Tick return ;----------------------------------------------------------------------------- ; Writes a vertical line of half-pixel at position (win_top,win_leftx2,win_height). ; Inputs: win_leftx2, win_top, win_height, win_color:2 ; Trashed: WREG, PROD, TABLAT, TBLPTRL global half_vertical_line half_vertical_line: clrf TABLAT ; Loop index. half_vertical_line_loop: movff win_leftx2,WREG ; Init X position. mullw 2 movf TABLAT,W ; Get loop index andlw 1 ; Just low bit xorwf PRODL,F ; And use it to jitter current X position rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) movff win_height,WREG ; Index reached height (Bank0 read) ? xorwf TABLAT,W btfsc STATUS,Z ; Equals ? return ; Yes: done. movff win_top,WREG ; Y = top + index (Bank0 read) addwf TABLAT,W rcall half_pixel_write_1 incf TABLAT,F ; index++ bra half_vertical_line_loop ;----------------------------------------------------------------------------- ; Writes a horizontal line of half-pixel at position (win_top,win_leftx2,win_width). ; Inputs: win_leftx2, win_top, win_width, win_color:2 ; Trashed: WREG, PROD, TABLAT, TBLPTRL global half_horizontal_line half_horizontal_line: clrf TABLAT ; Loop index. half_horizontal_line_loop: movff win_leftx2,WREG ; Init X position. mullw 2 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) movff win_width,WREG ; Index reached height (Bank0 read) ? xorwf TABLAT,W btfsc STATUS,Z ; Equals ? return ; Yes: done. movff win_top,WREG ; Y = top + index (Bank0 read) addwf TABLAT,W rcall half_pixel_write_1 incf TABLAT,F ; index++ bra half_horizontal_line_loop ;----------------------------------------------------------------------------- ; TFT Data Cmd via W ; global TFT_DataWrite_PROD TFT_DataWrite_PROD: ; RD_H ; Keep high RS_H ; Data movff PRODH,PORTA ; Move high byte to PORTA movff PRODL,PORTH ; Move low byte to PORTH WR_L WR_H ; Tick return TFT_DataRead_PROD: Index_out 0x22 ; Frame Memory Data Read start setf TRISA ; PortA as input. setf TRISH ; PortH as input. RS_H ; Data WR_H ; Not write RD_L ; Read! nop nop nop RD_H ; Tick nop RD_L ; Read! nop nop nop movff PORTA,PRODH movff PORTH,PRODL RD_H ; Tick nop clrf TRISA ; PortA as output clrf TRISH ; PortH as output return ;============================================================================= ; Output TFT Window Address commands. ; Inputs : win_top, win_leftx2, win_height, win_width. ; Output : PortA/PortH commands. ; Trashed: PROD ; global TFT_box_write TFT_box_write: movff win_leftx2,WREG ; Compute left = 2*leftx2 --> PROD mullw 2 global TFT_box_write_16bit_win_left TFT_box_write_16bit_win_left: ; With column in PRODL:PRODH btfsc flip_screen ; 180° rotation ? bra DISP_box_flip_H ; Yes ;---- Normal horizontal window --------------------------------------- Index_out 0x52 ; Window Vertical Start Address rcall TFT_DataWrite_PROD ; Output left Index_out 0x21 ; Frame Memory Vertical Address rcall TFT_DataWrite_PROD ; Output left movff win_width+0,WREG ; right = left + width - 1 addwf PRODL,F movff win_width+1,WREG addwfc PRODH,F decf PRODL,F ; decrement result btfss STATUS,C decf PRODH,F Index_out 0x53 ; Window Vertical End Address rcall TFT_DataWrite_PROD bra DISP_box_noflip_H ;---- Flipped horizontal window -------------------------------------- DISP_box_flip_H: movf PRODL,W ; 16bits 319 - PROD --> PROD sublw LOW(.319) ; 319-W --> W movwf PRODL movf PRODH,W btfss STATUS,C ; Borrow = /CARRY incf WREG sublw HIGH(.319) movwf PRODH Index_out 0x53 ; Window Vertical Start Address rcall TFT_DataWrite_PROD ; Output left Index_out 0x21 ; Frame Memory Vertical Address rcall TFT_DataWrite_PROD ; Output left movff win_width+0,WREG ; 16bits PROD - width --> PROD subwf PRODL,F ; PRODL - WREG --> PRODL movff win_width+1,WREG subwfb PRODH,F infsnz PRODL ; PROD+1 --> PROD incf PRODH Index_out 0x52 ; Window Vertical End Address rcall TFT_DataWrite_PROD DISP_box_noflip_H: btfss flip_screen ; 180° rotation ? bra TFT_box_noflip_V ; No. ;---- Flipped vertical window ----------------------------------------- movff win_top,PRODH ; top --> PRODH (first byte) movff win_height,WREG addwf PRODH,W decf WREG movwf PRODL ; top+height-1 --> PRODL (second byte) Index_out 0x50 ; Window Horizontal Start Address movf PRODH,W rcall TFT_DataWrite ; Lower (and tick) Index_out 0x51 ; Window Horizontal End Address movf PRODL,W rcall TFT_DataWrite ; Lower (and tick) Index_out 0x20 ; Frame Memory Horizontal Address movf PRODH,W rcall TFT_DataWrite ; Lower (and tick) return TFT_box_noflip_V: ;---- Normal vertical window ---------------------------------------- movff win_top,PRODL movff win_height,WREG addwf PRODL,W sublw .240 ; 240 - top - height movwf PRODH ; First byte movf PRODL,W sublw .239 ; 239-top movwf PRODL ; --> second byte. Index_out 0x50 ; Window Horizontal Start Address movf PRODH,W rcall TFT_DataWrite ; Lower (and tick) Index_out 0x51 ; Window Horizontal End Address movf PRODL,W rcall TFT_DataWrite ; Lower (and tick) Index_out 0x20 ; Frame Memory Horizontal Address movf PRODL,W rcall TFT_DataWrite ; Lower (and tick) return ;============================================================================= ; TFT_frame : draw a frame around current box with current color. ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 ; Outputs: (none) ; Trashed: WREG, PROD, aa_start:2, aa_end:2 global TFT_frame TFT_frame: movff win_top,save_top ; Backup everything. movff win_height,save_height movff win_leftx2,save_left movff win_width,save_width ;---- TOP line ----------------------------------------------------------- movlw 1 ; row ~ height=1 movff WREG,win_height rcall TFT_box ;---- BOTTOM line -------------------------------------------------------- movff save_top,PRODL ; Get back top, movff save_height,WREG ; and height addwf PRODL,W ; top+height decf WREG ; top+height-1 movff WREG,win_top ; top+height-1 --> top rcall TFT_box ;---- LEFT column -------------------------------------------------------- movff save_top,win_top ; Restore top/height. movff save_height,win_height movlw 1 ; column ~ width=1 movff WREG,win_width rcall TFT_box ;---- RIGHT column ------------------------------------------------------- movff save_left,WREG movff save_width,PRODL addwf PRODL,W decf WREG movff WREG,win_leftx2 rcall TFT_box ;---- Restore everything ------------------------------------------------- movff save_left,win_leftx2 movff save_width,win_width return ;============================================================================= ; TFT_box : fills current box with current color. ; Inputs: win_top, win_leftx2, win_height, win_width, win_color1, win_color2 ; Outputs: (none) ; Trashed: WREG, PROD global TFT_box TFT_box: ;---- Define Window ------------------------------------------------------ movf win_width,W bcf STATUS,C rlcf WREG movwf win_width+0 movlw 0 rlcf WREG movwf win_width+1 rcall TFT_box_write ; Setup box global TFT_box_16bit_win_left TFT_box_16bit_win_left: rrcf win_width+1,W ; width /= 2 rrcf win_width+0,W movwf win_width ;---- Fill Window -------------------------------------------------------- Index_out 0x22 ; Frame Memory Data Write start clrf PRODH ; Column counter. RS_H ; Data TFT_box2: ; Loop height times movff win_height,PRODL TFT_box3: ; loop width times movff win_color1,PORTA ; Upper movff win_color2,PORTH ; Lower WR_L WR_H ; Tick movff win_color1,PORTA ; Upper movff win_color2,PORTH ; Lower WR_L WR_H ; Tick decfsz PRODL,F ; row loop finished ? bra TFT_box3 ; No: continue. incf PRODH,F ; column count ++ movff win_bargraph,WREG ; current column == bargraph ? cpfseq PRODH bra TFT_box4 ; No: just loop. clrf WREG ; Yes: switch to black movff WREG,win_color1 movff WREG,win_color2 TFT_box4: movff win_width+0,WREG ; compare ? xorwf PRODH,W bnz TFT_box2 ; Loop not finished. movlw 0x00 ; NOP, to stop window mode rcall TFT_CmdWrite setf WREG ; Reset bargraph mode... movff WREG,win_bargraph return ;============================================================================= ;Converts 8Bit RGB b'RRRGGGBB' into 16Bit RGB b'RRRRRGGGGGGBBBBB' global TFT_set_color TFT_set_color: movwf tft_temp1 ; Get 8Bit RGB b'RRRGGGBB' movwf tft_temp2 ; Copy ; Mask Bit 7,6,5,4,3,2 movlw b'00000011' andwf tft_temp2,F movlw b'00000000' dcfsnz tft_temp2,F movlw b'01010000' dcfsnz tft_temp2,F movlw b'10100000' dcfsnz tft_temp2,F movlw b'11111000' movwf tft_temp3 ; Blue done. movff tft_temp1, tft_temp2 ; Copy ; Mask Bit 7,6,5,1,0 movlw b'00011100' andwf tft_temp2,F rrncf tft_temp2,F rrncf tft_temp2,F movlw b'00000000' dcfsnz tft_temp2,F movlw b'00000100' dcfsnz tft_temp2,F movlw b'00001000' dcfsnz tft_temp2,F movlw b'00001100' dcfsnz tft_temp2,F movlw b'00010000' dcfsnz tft_temp2,F movlw b'00010100' dcfsnz tft_temp2,F movlw b'00100000' dcfsnz tft_temp2,F movlw b'00111111' movwf tft_temp4 rrcf tft_temp4,F rrcf tft_temp3,F rrcf tft_temp4,F rrcf tft_temp3,F rrcf tft_temp4,F rrcf tft_temp3,F ; tft_temp3 (b'GGGBBBBB') done. movff tft_temp1, tft_temp2 ; Copy clrf tft_temp1 rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F ; Green done. ; Mask Bit 4,3,2,1,0 movlw b'11100000' andwf tft_temp2,F rrncf tft_temp2,F rrncf tft_temp2,F rrncf tft_temp2,F rrncf tft_temp2,F rrncf tft_temp2,F movlw b'00000000' dcfsnz tft_temp2,F movlw b'00000100' dcfsnz tft_temp2,F movlw b'00001000' dcfsnz tft_temp2,F movlw b'00001100' dcfsnz tft_temp2,F movlw b'00010000' dcfsnz tft_temp2,F movlw b'00010100' dcfsnz tft_temp2,F movlw b'00100000' dcfsnz tft_temp2,F movlw b'00111111' movwf tft_temp4 rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F rrcf tft_temp4,F rrcf tft_temp1,F ; Red done. movff tft_temp1,win_color1 movff tft_temp3,win_color2 ; Set Bank0 Color registers... return ;============================================================================= ; Dump screen contents to the UART global TFT_dump_screen TFT_dump_screen: bsf no_sensor_int movlw 'l' movwf TXREG ; Send command echo. call rs232_wait_tx ; wait for UART ;---- Send DISPLAY box command for the full screen window ------------------- Index_out 0x50 ; Window Horizontal Start Address Parameter_out 0x00, 0x00 ; 0-239 Index_out 0x51 ; Window Horizontal End Address Parameter_out 0x00, 0xEF ; 0-239 Index_out 0x52 ; Window Vertical Start Address Parameter_out 0x00, 0x00 ; 0-319 Index_out 0x53 ; Window Vertical End Address Parameter_out 0x01, 0x3F ; 0-319 clrf ds_column rcall dump_screen_pixel_reset dump_screen_1: btg LEDr ; LED activity toggle ; Dump even column movlw .240 ; 240 lines, once. movwf ds_line dump_screen_2: Index_out 0x20 ; Frame Memory Horizontal Address movff ds_line,WREG ; d'0' ... d'239' mullw 1 ; Copy row to PRODH:L rcall TFT_DataWrite_PROD movff ds_column,WREG ; Init X position. mullw 2 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) rcall TFT_DataRead_PROD ; read pixel rcall dump_screen_pixel decfsz ds_line,F bra dump_screen_2 rcall dump_screen_pixel_flush ; Dump odd column movlw .240 ; 240 lines, twice. movwf ds_line dump_screen_3: Index_out 0x20 ; Frame Memory Horizontal Address movff ds_line,WREG ; d'0' ... d'239' mullw 1 ; Copy row to PRODH:L rcall TFT_DataWrite_PROD movff ds_column,WREG ; Init X position. mullw 2 movlw .1 addwf PRODL,F movlw 0 addwfc PRODH,F ; +1 rcall pixel_write_col320 ; Start Address Vertical (.0 - .319) rcall TFT_DataRead_PROD ; read pixel rcall dump_screen_pixel decfsz ds_line,F bra dump_screen_3 rcall dump_screen_pixel_flush incf ds_column,F movlw .160 cpfseq ds_column bra dump_screen_1 bcf no_sensor_int clrf RCREG1 ; Clear receive buffer bcf RCSTA1,CREN ; Clear receiver status bsf RCSTA1,CREN bsf enable_screen_dumps ; =1: Ignore vin_usb, wait for "l" command (Screen dump) return ;============================================================================= ; Pixel compression ; ; Input: PRODH:L = pixel. ; Output: Compressed stream on output. ; Compressed format: ; 0ccccccc : BLACK pixel, repeated ccccccc+1 times (1..128). ; 11cccccc : WHITE pixel, repeated cccccc+1 times (1..64). ; 10cccccc HIGH LOW : color pixel (H:L) repeated ccccc+1 times (1..64). ; dump_screen_pixel: movf PRODH,W ; Compare pixel-high xorwf ds_pixel+1,W bnz dump_screen_pixel_1 ; Different -> dump. movf PRODL,W ; Compare pixel-low xorwf ds_pixel+0,W bnz dump_screen_pixel_1 ; Different -> dump. incf ds_count,F ; Same color: just increment. return dump_screen_pixel_1: ; Send (pixel,count) tuple movf ds_count,W ; Is count zero ? bz dump_screen_pixel_2 ; Yes: skip sending. movf ds_pixel+1,W ; This is a BLACK pixel ? iorwf ds_pixel+0,W bz dump_screen_pix_black ; YES. movf ds_pixel+1,W ; This is a white pixel ? andwf ds_pixel+0,W incf WREG bz dump_screen_pix_white ; YES. ; No: write the pixel itself... movlw .64 ; Max color pixel on a single byte. cpfsgt ds_count ; Skip if count > 64 movf ds_count,W ; W <- min(64,count) subwf ds_count,F ; ds_count <- ds_count-W decf WREG ; Save as 0..63 iorlw b'10000000' ; MARK as a color pixel. movwf TXREG call rs232_wait_tx ; wait for UART movff ds_pixel+1,TXREG call rs232_wait_tx ; wait for UART movff ds_pixel+0,TXREG call rs232_wait_tx ; wait for UART bra dump_screen_pixel_1 dump_screen_pixel_2: movff PRODH,ds_pixel+1 ; Save new pixel color movff PRODL,ds_pixel+0 movlw 1 movwf ds_count ; And set count=1. return dump_screen_pix_black: movlw .128 ; Max black pixel on a single byte. cpfsgt ds_count ; Skip if count > 128 movf ds_count,W ; W <- min(128,count) subwf ds_count,F ; ds_count <- ds_count-W decf WREG ; Save as 0..127 dump_screen_pix_3: movwf TXREG call rs232_wait_tx bra dump_screen_pixel_1 ; More to dump ? dump_screen_pix_white: movlw .64 ; Max white pixel on a single byte. cpfsgt ds_count ; Skip if count > 64 movf ds_count,W ; W <- min(64,count) subwf ds_count,F ; ds_count <- ds_count-W decf WREG ; Save as 0..63 iorlw b'11000000' ; MARK as a compressed white. bra dump_screen_pix_3 dump_screen_pixel_flush: clrf PRODH clrf PRODL rcall dump_screen_pixel_1 ; Send it dump_screen_pixel_reset: clrf ds_count ; But clear count. return end