參考資訊：
https://github.com/adafruit/Adafruit_SSD1306
https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
main.s
list p=12f1822, r=hex
#include <p12f1822.inc>
__config _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _MCLRE_OFF
__config _CONFIG2, _LVP_OFF
#define i2c_cnt 0x70
#define i2c_dat 0x71
#define i2c_var 0x72
#define lcd_t1 0x73
#define lcd_t2 0x74
#define delay_t1 0x75
#define delay_t2 0x76
#define ssd_page 0x77
#define ssd_col 0x78
#define get_ascii_v1 0x79
#define show_ascii_v1 0x7a
#define led 0x00
#define i2c_scl 0x01
#define i2c_sda 0x02
#define i2c_addr 0x78
#define lcd_width 0x80
#define lcd_height 0x20
#define cmd_contrast 0x81
#define cmd_disp_resume 0xa4
#define cmd_normal_disp 0xa6
#define cmd_invert_disp 0xa7
#define cmd_disp_off 0xae
#define cmd_disp_on 0xaf
#define cmd_disp_offset 0xd3
#define cmd_com_pins 0xda
#define cmd_vcom_detect 0xdb
#define cmd_clock_div 0xd5
#define cmd_pre_charge 0xd9
#define cmd_multiplex 0xa8
#define cmd_start_line 0x40
#define cmd_memory_mode 0x20
#define cmd_column_addr 0x21
#define cmd_page_addr 0x22
#define cmd_scan_dec 0xc8
#define cmd_seg_remap 0xa1
#define cmd_charge_pump 0x8d
org 0x0000
goto start
org 0x0100
start:
banksel OSCCON
movlw b'11110010'
movwf OSCCON
banksel ANSELA
clrf ANSELA
banksel LATA
movlw 0xff
movwf LATA
banksel TRISA
bcf TRISA, led
bcf TRISA, i2c_scl
bcf TRISA, i2c_sda
banksel LATA
movlw 0xff
movwf LATA
loop:
call ssd1306_init
call ssd1306_clear
movlw d'30'
call ssd1306_set_col_addr
movlw 1
call ssd1306_set_page_addr
;PIC12F1822
movlw d'26'
call ssd1306_show_ascii
movlw d'19'
call ssd1306_show_ascii
movlw d'13'
call ssd1306_show_ascii
movlw d'1'
call ssd1306_show_ascii
movlw d'2'
call ssd1306_show_ascii
movlw d'16'
call ssd1306_show_ascii
movlw d'1'
call ssd1306_show_ascii
movlw d'8'
call ssd1306_show_ascii
movlw d'2'
call ssd1306_show_ascii
movlw d'2'
call ssd1306_show_ascii
movlw d'38'
call ssd1306_set_col_addr
movlw 2
call ssd1306_set_page_addr
;STEWARD
movlw d'29'
call ssd1306_show_ascii
movlw d'30'
call ssd1306_show_ascii
movlw d'15'
call ssd1306_show_ascii
movlw d'33'
call ssd1306_show_ascii
movlw d'11'
call ssd1306_show_ascii
movlw d'28'
call ssd1306_show_ascii
movlw d'14'
call ssd1306_show_ascii
idle:
banksel LATA
bcf LATA, led
call delay1s
banksel LATA
bsf LATA, led
call delay1s
goto idle
delay1s:
banksel delay_t1
movlw 0xff
movwf delay_t2
movwf delay_t1
decfsz delay_t1, f
goto $-1
decfsz delay_t2, f
goto $-3
return
delay:
banksel delay_t1
movlw 0x40
movwf delay_t1
decfsz delay_t1, f
goto $-1
return
i2c_start:
banksel LATA
bsf LATA, i2c_sda
bsf LATA, i2c_scl
call delay
banksel LATA
bcf LATA, i2c_sda
call delay
banksel LATA
bcf LATA, i2c_scl
return
i2c_stop:
call delay
banksel LATA
bcf LATA, i2c_sda
call delay
banksel LATA
bsf LATA, i2c_scl
call delay
banksel LATA
bsf LATA, i2c_sda
return
i2c_write:
banksel i2c_dat
movwf i2c_dat
movlw 0x08
movwf i2c_cnt
i0:
banksel i2c_dat
rlf i2c_dat, f
banksel LATA
btfss STATUS, C
bcf LATA, i2c_sda
btfsc STATUS, C
bsf LATA, i2c_sda
call delay
banksel LATA
bsf LATA, i2c_scl
call delay
banksel LATA
bcf LATA, i2c_scl
decfsz i2c_cnt, f
goto i0
call delay
banksel LATA
bsf LATA, i2c_sda
call delay
banksel LATA
bsf LATA, i2c_scl
call delay
banksel LATA
bcf LATA, i2c_scl
return
send_cmd:
banksel i2c_var
movwf i2c_var
call i2c_start
movlw i2c_addr
call i2c_write
movlw 0x00
call i2c_write
banksel i2c_var
movf i2c_var, w
call i2c_write
call i2c_stop
return
send_dat:
banksel i2c_var
movwf i2c_var
call i2c_start
movlw i2c_addr
call i2c_write
movlw 0x40
call i2c_write
banksel i2c_var
movf i2c_var, w
call i2c_write
call i2c_stop
return
ssd1306_init:
movlw cmd_disp_off
call send_cmd
movlw cmd_clock_div
call send_cmd
movlw 0x80
call send_cmd
movlw cmd_multiplex
call send_cmd
movlw 0x1f
call send_cmd
movlw cmd_disp_offset
call send_cmd
movlw 0x00
call send_cmd
movlw cmd_start_line
call send_cmd
movlw cmd_charge_pump
call send_cmd
movlw 0x14
call send_cmd
movlw cmd_memory_mode
call send_cmd
movlw 0x00
call send_cmd
movlw cmd_seg_remap
call send_cmd
movlw cmd_scan_dec
call send_cmd
movlw cmd_com_pins
call send_cmd
movlw 0x02
call send_cmd
movlw cmd_contrast
call send_cmd
movlw 0x8f
call send_cmd
movlw cmd_pre_charge
call send_cmd
movlw 0xf1
call send_cmd
movlw cmd_vcom_detect
call send_cmd
movlw 0x40
call send_cmd
movlw cmd_disp_resume
call send_cmd
movlw cmd_normal_disp
call send_cmd
movlw cmd_disp_on
call send_cmd
return
ssd1306_set_col_addr:
banksel ssd_col
movwf ssd_col
movlw cmd_column_addr
call send_cmd
banksel ssd_col
movf ssd_col, w
call send_cmd
movlw (lcd_width-1)
call send_cmd
return
ssd1306_set_page_addr:
banksel ssd_page
movwf ssd_page
movlw cmd_page_addr
call send_cmd
banksel ssd_page
movf ssd_page, w
call send_cmd
movlw ((lcd_height/8)-1)
call send_cmd
return
ssd1306_clear:
clrw
call ssd1306_set_col_addr
clrw
call ssd1306_set_page_addr
call i2c_start
movlw i2c_addr
call i2c_write
movlw 0x40
call i2c_write
banksel lcd_t1
movlw 0x08
movwf lcd_t1
s0:
movlw 0x40
movwf lcd_t2
s1:
clrw
call i2c_write
banksel lcd_t2
decfsz lcd_t2, f
goto s1
decfsz lcd_t1, f
goto s0
call i2c_stop
return
ssd1306_show_ascii:
banksel show_ascii_v1
movwf show_ascii_v1
clrw
mul0:
addlw 5
decfsz show_ascii_v1, f
goto mul0
movwf show_ascii_v1
call i2c_start
movlw i2c_addr
call i2c_write
movlw 0x40
call i2c_write
banksel show_ascii_v1
movf show_ascii_v1, w
call get_ascii
call i2c_write
banksel show_ascii_v1
movf show_ascii_v1, w
addlw 1
call get_ascii
call i2c_write
banksel show_ascii_v1
movf show_ascii_v1, w
addlw 2
call get_ascii
call i2c_write
banksel show_ascii_v1
movf show_ascii_v1, w
addlw 3
call get_ascii
call i2c_write
banksel show_ascii_v1
movf show_ascii_v1, w
addlw 4
call get_ascii
call i2c_write
clrw
call i2c_write
call i2c_stop
return
get_ascii:
addlw LOW(ascii_5x8)
movwf get_ascii_v1
movlw HIGH(ascii_5x8)
btfsc STATUS, C
addlw 1
movwf PCLATH
movfw get_ascii_v1
movwf PCL
ascii_5x8:
retlw b'00111110' ; 30 ..*****.
retlw b'01010001' ; 30 .*.*...*
retlw b'01001001' ; 30 .*..*..*
retlw b'01000101' ; 30 .*...*.*
retlw b'00111110' ; 30 ..*****.
retlw b'00000000' ; 31 ........
retlw b'01000010' ; 31 .*....*.
retlw b'01111111' ; 31 .*******
retlw b'01000000' ; 31 .*......
retlw b'00000000' ; 31 ........
retlw b'01000010' ; 32 .*....*.
retlw b'01100001' ; 32 .**....*
retlw b'01010001' ; 32 .*.*...*
retlw b'01001001' ; 32 .*..*..*
retlw b'01000110' ; 32 .*...**.
retlw b'00100001' ; 33 ..*....*
retlw b'01000001' ; 33 .*.....*
retlw b'01000101' ; 33 .*...*.*
retlw b'01001011' ; 33 .*..*.**
retlw b'00110001' ; 33 ..**...*
retlw b'00011000' ; 34 ...**...
retlw b'00010100' ; 34 ...*.*..
retlw b'00010010' ; 34 ...*..*.
retlw b'01111111' ; 34 .*******
retlw b'00010000' ; 34 ...*....
retlw b'00100111' ; 35 ..*..***
retlw b'01000101' ; 35 .*...*.*
retlw b'01000101' ; 35 .*...*.*
retlw b'01000101' ; 35 .*...*.*
retlw b'00111001' ; 35 ..***..*
retlw b'00111100' ; 36 ..****..
retlw b'01001010' ; 36 .*..*.*.
retlw b'01001001' ; 36 .*..*..*
retlw b'01001001' ; 36 .*..*..*
retlw b'00110000' ; 36 ..**....
retlw b'00000001' ; 37 .......*
retlw b'01110001' ; 37 .***...*
retlw b'00001001' ; 37 ....*..*
retlw b'00000101' ; 37 .....*.*
retlw b'00000011' ; 37 ......**
retlw b'00110110' ; 38 ..**.**.
retlw b'01001001' ; 38 .*..*..*
retlw b'01001001' ; 38 .*..*..*
retlw b'01001001' ; 38 .*..*..*
retlw b'00110110' ; 38 ..**.**.
retlw b'00000110' ; 39 .....**.
retlw b'01001001' ; 39 .*..*..*
retlw b'01001001' ; 39 .*..*..*
retlw b'00101001' ; 39 ..*.*..*
retlw b'00011110' ; 39 ...****.
retlw b'00000000' ; 20 ........
retlw b'00000000' ; 20 ........
retlw b'00000000' ; 20 ........
retlw b'00000000' ; 20 ........
retlw b'00000000' ; 20 ........
retlw b'01111110' ; 41 .******.
retlw b'00010001' ; 41 ...*...*
retlw b'00010001' ; 41 ...*...*
retlw b'00010001' ; 41 ...*...*
retlw b'01111110' ; 41 .******.
retlw b'01111111' ; 42 .*******
retlw b'01001001' ; 42 .*..*..*
retlw b'01001001' ; 42 .*..*..*
retlw b'01001001' ; 42 .*..*..*
retlw b'00110110' ; 42 ..**.**.
retlw b'00111110' ; 43 ..*****.
retlw b'01000001' ; 43 .*.....*
retlw b'01000001' ; 43 .*.....*
retlw b'01000001' ; 43 .*.....*
retlw b'00100010' ; 43 ..*...*.
retlw b'01111111' ; 44 .*******
retlw b'01000001' ; 44 .*.....*
retlw b'01000001' ; 44 .*.....*
retlw b'00100010' ; 44 ..*...*.
retlw b'00011100' ; 44 ...***..
retlw b'01111111' ; 45 .*******
retlw b'01001001' ; 45 .*..*..*
retlw b'01001001' ; 45 .*..*..*
retlw b'01001001' ; 45 .*..*..*
retlw b'01000001' ; 45 .*.....*
retlw b'01111111' ; 46 .*******
retlw b'00001001' ; 46 ....*..*
retlw b'00001001' ; 46 ....*..*
retlw b'00000001' ; 46 .......*
retlw b'00000001' ; 46 .......*
retlw b'00111110' ; 47 ..*****.
retlw b'01000001' ; 47 .*.....*
retlw b'01000001' ; 47 .*.....*
retlw b'01010001' ; 47 .*.*...*
retlw b'00110010' ; 47 ..**..*.
retlw b'01111111' ; 48 .*******
retlw b'00001000' ; 48 ....*...
retlw b'00001000' ; 48 ....*...
retlw b'00001000' ; 48 ....*...
retlw b'01111111' ; 48 .*******
retlw b'00000000' ; 49 ........
retlw b'01000001' ; 49 .*.....*
retlw b'01111111' ; 49 .*******
retlw b'01000001' ; 49 .*.....*
retlw b'00000000' ; 49 ........
retlw b'00100000' ; 4a ..*.....
retlw b'01000000' ; 4a .*......
retlw b'01000001' ; 4a .*.....*
retlw b'00111111' ; 4a ..******
retlw b'00000001' ; 4a .......*
retlw b'01111111' ; 4b .*******
retlw b'00001000' ; 4b ....*...
retlw b'00010100' ; 4b ...*.*..
retlw b'00100010' ; 4b ..*...*.
retlw b'01000001' ; 4b .*.....*
retlw b'01111111' ; 4c .*******
retlw b'01000000' ; 4c .*......
retlw b'01000000' ; 4c .*......
retlw b'01000000' ; 4c .*......
retlw b'01000000' ; 4c .*......
retlw b'01111111' ; 4d .*******
retlw b'00000010' ; 4d ......*.
retlw b'00000100' ; 4d .....*..
retlw b'00000010' ; 4d ......*.
retlw b'01111111' ; 4d .*******
retlw b'01111111' ; 4e .*******
retlw b'00000100' ; 4e .....*..
retlw b'00001000' ; 4e ....*...
retlw b'00010000' ; 4e ...*....
retlw b'01111111' ; 4e .*******
retlw b'00111110' ; 4f ..*****.
retlw b'01000001' ; 4f .*.....*
retlw b'01000001' ; 4f .*.....*
retlw b'01000001' ; 4f .*.....*
retlw b'00111110' ; 4f ..*****.
retlw b'01111111' ; 50 .*******
retlw b'00001001' ; 50 ....*..*
retlw b'00001001' ; 50 ....*..*
retlw b'00001001' ; 50 ....*..*
retlw b'00000110' ; 50 .....**.
retlw b'00111110' ; 51 ..*****.
retlw b'01000001' ; 51 .*.....*
retlw b'01010001' ; 51 .*.*...*
retlw b'00100001' ; 51 ..*....*
retlw b'01011110' ; 51 .*.****.
retlw b'01111111' ; 52 .*******
retlw b'00001001' ; 52 ....*..*
retlw b'00011001' ; 52 ...**..*
retlw b'00101001' ; 52 ..*.*..*
retlw b'01000110' ; 52 .*...**.
retlw b'01000110' ; 53 .*...**.
retlw b'01001001' ; 53 .*..*..*
retlw b'01001001' ; 53 .*..*..*
retlw b'01001001' ; 53 .*..*..*
retlw b'00110001' ; 53 ..**...*
retlw b'00000001' ; 54 .......*
retlw b'00000001' ; 54 .......*
retlw b'01111111' ; 54 .*******
retlw b'00000001' ; 54 .......*
retlw b'00000001' ; 54 .......*
retlw b'00111111' ; 55 ..******
retlw b'01000000' ; 55 .*......
retlw b'01000000' ; 55 .*......
retlw b'01000000' ; 55 .*......
retlw b'00111111' ; 55 ..******
retlw b'00011111' ; 56 ...*****
retlw b'00100000' ; 56 ..*.....
retlw b'01000000' ; 56 .*......
retlw b'00100000' ; 56 ..*.....
retlw b'00011111' ; 56 ...*****
retlw b'01111111' ; 57 .*******
retlw b'00100000' ; 57 ..*.....
retlw b'00011000' ; 57 ...**...
retlw b'00100000' ; 57 ..*.....
retlw b'01111111' ; 57 .*******
retlw b'01100011' ; 58 .**...**
retlw b'00010100' ; 58 ...*.*..
retlw b'00001000' ; 58 ....*...
retlw b'00010100' ; 58 ...*.*..
retlw b'01100011' ; 58 .**...**
retlw b'00000011' ; 59 ......**
retlw b'00000100' ; 59 .....*..
retlw b'01111000' ; 59 .****...
retlw b'00000100' ; 59 .....*..
retlw b'00000011' ; 59 ......**
retlw b'01100001' ; 5a .**....*
retlw b'01010001' ; 5a .*.*...*
retlw b'01001001' ; 5a .*..*..*
retlw b'01000101' ; 5a .*...*.*
retlw b'01000011' ; 5a .*....**
retlw b'00100000' ; 61 ..*.....
retlw b'01010100' ; 61 .*.*.*..
retlw b'01010100' ; 61 .*.*.*..
retlw b'01010100' ; 61 .*.*.*..
retlw b'01111000' ; 61 .****...
retlw b'01111111' ; 62 .*******
retlw b'01001000' ; 62 .*..*...
retlw b'01000100' ; 62 .*...*..
retlw b'01000100' ; 62 .*...*..
retlw b'00111000' ; 62 ..***...
retlw b'00111000' ; 63 ..***...
retlw b'01000100' ; 63 .*...*..
retlw b'01000100' ; 63 .*...*..
retlw b'01000100' ; 63 .*...*..
retlw b'00100000' ; 63 ..*.....
retlw b'00111000' ; 64 ..***...
retlw b'01000100' ; 64 .*...*..
retlw b'01000100' ; 64 .*...*..
retlw b'01001000' ; 64 .*..*...
retlw b'01111111' ; 64 .*******
retlw b'00111000' ; 65 ..***...
retlw b'01010100' ; 65 .*.*.*..
retlw b'01010100' ; 65 .*.*.*..
retlw b'01010100' ; 65 .*.*.*..
retlw b'00011000' ; 65 ...**...
retlw b'00001000' ; 66 ....*...
retlw b'01111110' ; 66 .******.
retlw b'00001001' ; 66 ....*..*
retlw b'00000001' ; 66 .......*
retlw b'00000010' ; 66 ......*.
retlw b'00001000' ; 67 ....*...
retlw b'00010100' ; 67 ...*.*..
retlw b'01010100' ; 67 .*.*.*..
retlw b'01010100' ; 67 .*.*.*..
retlw b'00111100' ; 67 ..****..
retlw b'01111111' ; 68 .*******
retlw b'00001000' ; 68 ....*...
retlw b'00000100' ; 68 .....*..
retlw b'00000100' ; 68 .....*..
retlw b'01111000' ; 68 .****...
retlw b'00000000' ; 69 ........
retlw b'01000100' ; 69 .*...*..
retlw b'01111101' ; 69 .*****.*
retlw b'01000000' ; 69 .*......
retlw b'00000000' ; 69 ........
retlw b'00100000' ; 6a ..*.....
retlw b'01000000' ; 6a .*......
retlw b'01000100' ; 6a .*...*..
retlw b'00111101' ; 6a ..****.*
retlw b'00000000' ; 6a ........
retlw b'00000000' ; 6b ........
retlw b'01111111' ; 6b .*******
retlw b'00010000' ; 6b ...*....
retlw b'00101000' ; 6b ..*.*...
retlw b'01000100' ; 6b .*...*..
retlw b'00000000' ; 6c ........
retlw b'01000001' ; 6c .*.....*
retlw b'01111111' ; 6c .*******
retlw b'01000000' ; 6c .*......
retlw b'00000000' ; 6c ........
retlw b'01111100' ; 6d .*****..
retlw b'00000100' ; 6d .....*..
retlw b'00011000' ; 6d ...**...
retlw b'00000100' ; 6d .....*..
retlw b'01111000' ; 6d .****...
retlw b'01111100' ; 6e .*****..
retlw b'00001000' ; 6e ....*...
retlw b'00000100' ; 6e .....*..
retlw b'00000100' ; 6e .....*..
retlw b'01111000' ; 6e .****...
retlw b'00111000' ; 6f ..***...
retlw b'01000100' ; 6f .*...*..
retlw b'01000100' ; 6f .*...*..
retlw b'01000100' ; 6f .*...*..
retlw b'00111000' ; 6f ..***...
retlw b'01111100' ; 70 .*****..
retlw b'00010100' ; 70 ...*.*..
retlw b'00010100' ; 70 ...*.*..
retlw b'00010100' ; 70 ...*.*..
retlw b'00001000' ; 70 ....*...
retlw b'00001000' ; 71 ....*...
retlw b'00010100' ; 71 ...*.*..
retlw b'00010100' ; 71 ...*.*..
retlw b'00011000' ; 71 ...**...
retlw b'01111100' ; 71 .*****..
retlw b'01111100' ; 72 .*****..
retlw b'00001000' ; 72 ....*...
retlw b'00000100' ; 72 .....*..
retlw b'00000100' ; 72 .....*..
retlw b'00001000' ; 72 ....*...
retlw b'01001000' ; 73 .*..*...
retlw b'01010100' ; 73 .*.*.*..
retlw b'01010100' ; 73 .*.*.*..
retlw b'01010100' ; 73 .*.*.*..
retlw b'00100000' ; 73 ..*.....
retlw b'00000100' ; 74 .....*..
retlw b'00111111' ; 74 ..******
retlw b'01000100' ; 74 .*...*..
retlw b'01000000' ; 74 .*......
retlw b'00100000' ; 74 ..*.....
retlw b'00111100' ; 75 ..****..
retlw b'01000000' ; 75 .*......
retlw b'01000000' ; 75 .*......
retlw b'00100000' ; 75 ..*.....
retlw b'01111100' ; 75 .*****..
retlw b'00011100' ; 76 ...***..
retlw b'00100000' ; 76 ..*.....
retlw b'01000000' ; 76 .*......
retlw b'00100000' ; 76 ..*.....
retlw b'00011100' ; 76 ...***..
retlw b'00111100' ; 77 ..****..
retlw b'01000000' ; 77 .*......
retlw b'00110000' ; 77 ..**....
retlw b'01000000' ; 77 .*......
retlw b'00111100' ; 77 ..****..
retlw b'01000100' ; 78 .*...*..
retlw b'00101000' ; 78 ..*.*...
retlw b'00010000' ; 78 ...*....
retlw b'00101000' ; 78 ..*.*...
retlw b'01000100' ; 78 .*...*..
retlw b'00001100' ; 79 ....**..
retlw b'01010000' ; 79 .*.*....
retlw b'01010000' ; 79 .*.*....
retlw b'01010000' ; 79 .*.*....
retlw b'00111100' ; 79 ..****..
retlw b'01000100' ; 7a .*...*..
retlw b'01100100' ; 7a .**..*..
retlw b'01010100' ; 7a .*.*.*..
retlw b'01001100' ; 7a .*..**..
retlw b'01000100' ; 7a .*...*..
end
編譯
$ gpasm main.s
完成