PIC12F1822 >> Assembly
0.91" OLED 128x32 SSD1306
參考資訊:
1. SSD1306
2. Adafruit_SSD1306
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_var1 0x73 #define lcd_var2 0x74 #define delay_var1 0x75 #define delay_var2 0x76 #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_set_col_addr call ssd1306_set_page_addr lcd: call i2c_start movlw i2c_addr call i2c_write movlw 0x40 call i2c_write banksel lcd_var1 movlw 0x08 movwf lcd_var1 m0: movlw 0x40 movwf lcd_var2 m1: movlw 0x55 call i2c_write banksel lcd_var2 decfsz lcd_var2, f goto m1 decfsz lcd_var1, f goto m0 call i2c_stop idle: banksel LATA bcf LATA, led call delay1s banksel LATA bsf LATA, led call delay1s goto idle delay1s: banksel delay_var1 movlw 0xff movwf delay_var2 movwf delay_var1 decfsz delay_var1, f goto $-1 decfsz delay_var2, f goto $-3 return delay: banksel delay_var1 movlw 0x40 movwf delay_var1 decfsz delay_var1, 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: movlw cmd_column_addr call send_cmd movlw 0x00 call send_cmd movlw (lcd_width-1) call send_cmd return ssd1306_set_page_addr: movlw cmd_page_addr call send_cmd movlw 0x00 call send_cmd movlw ((lcd_height/8)-1) call send_cmd return end
編譯
$ gpasm main.s
完成