QUET_PHAI_SANG: ; CHU Y: H_SCAN_POINTER:L_SCAN_POINTER chi la con tro thanh ghi du lieu cho TIMER1 ; cho nen no luon thay doi chu no khong phai la dia chi co dinh ; Vay phai luu lai dia chi co dinh cua du lieu quet ; dia chi co dinh du lieu quet lds XH, H_LESSION lds XL, L_LESSION adiw XH:XL, LESSION_HEADER ; 16 byte sts H_DATA_SCAN, XH ; luu dia chi LESSION_DATA dau tien sts L_DATA_SCAN, XL ; tinh toan tong cong buoc lap - dieu kien ket thuc lds r17, NUM_DATA_MODULE ldi r18, 4 ; neu NUM_MATRIX_COL + NUM_DATA_MODULE * 4 >= 64 module (256 cot) thi phai dung 2 byte so sanh mul r17, r18 lds r16, NUM_MATRIX_COL add r16, r0 sts SUM_MATRIX_DATA_COL, r16 ; tinh toan dia chi trang man hinh 0 va 1 (2 trang) lds r16, L_LESSION ; bat dau RAM ngoai lds r17, H_LESSION lds r18, L_DATA_SIZE ; kich thuoc 1 lession lds r19, H_DATA_SIZE add r16, r18 adc r17, r19 sts L_MATRIX_SCREEN_0, r16 ; dia chi man hinh 0 sts H_MATRIX_SCREEN_0, r17 lds r18, L_OFFSET_PAGE ; kich thuoc 1 page lds r19, H_OFFSET_PAGE add r16, r18 adc r17, r19 sts L_MATRIX_SCREEN_1, r16 ; dia chi man hinh 1 sts H_MATRIX_SCREEN_1, r17 ; chuan bi: dat dia chi quet ve trang 0 lds L_SCAN_POINTER, L_MATRIX_SCREEN_0 lds H_SCAN_POINTER, H_MATRIX_SCREEN_0 ; va xoa het du lieu trang 0 va trang 1 movw XH:XL, H_SCAN_POINTER:L_SCAN_POINTER lds YL, L_MATRIX_SCREEN_1 lds YH, H_MATRIX_SCREEN_1 lds ZH, H_OFFSET_PAGE lds ZL, L_OFFSET_PAGE ldi r16, 0xFF ; ky tu xoa erase_loop: st X+, r16 st Y+, r16 sbiw ZH:ZL, 1 brne erase_loop ; bat dau tinh toan de quet clr V_NUM_COL clr V_NUM_LED ; tinh offset theo matrix H_OFFSET_MATRIX:L_OFFSET_MATRIX ldi r16, 16 ; module 1 mau thi offset la 16 - 3 mau phai thay doi (***) lds r18, NUM_MODULE ; so module mul r16, r18 movw r17:r16, r1:r0 ldi r18, 8 ; nhan tiep voi 8 mul r16, r18 movw r3:r2, r1:r0 mul r17, r18 add r3, r0 sts H_OFFSET_MATRIX, r3 sts L_OFFSET_MATRIX, r2 lds r16, NUM_DATA_MODULE ldi r18, 4 ; gian cach 1 hang trong DATA IN (***) mul r16, r18 movw r17:r16, r1:r0 ldi r18, 8 ; nhan tiep voi 8 mul r16, r18 movw r3:r2, r1:r0 mul r17, r18 add r3, r0 sts H_OFFSET_DATA_4, r3 sts L_OFFSET_DATA_4, r2 lds r16, NUM_DATA_MODULE ; so module ldi r18, 16 ; gian cach 4 hang trong DATA IN (***) mul r16, r18 movw r17:r16, r1:r0 ldi r18, 8 ; nhan tiep voi 8 mul r16, r18 movw r3:r2, r1:r0 mul r17, r18 add r3, r0 sts H_OFFSET_DATA_16, r3 sts L_OFFSET_DATA_16, r2 thay_doi_1_vi_tri_LED: ldi r16, 0 sts V_NUM_SCAN, r16 ; dat lai dia chi con tro LESSION_DATA ve trang 0 sau khi doi trang lds L_SCAN_POINTER, L_MATRIX_SCREEN_0 lds H_SCAN_POINTER, H_MATRIX_SCREEN_0 sei ; ngat chi duoc thuc hien tai day dau_trang: mov r16, V_NUM_COL lds r17, NUM_MATRIX_COL sub r16, r17 ; (*) chieu rong ma tran tinh theo cot brsh jump_giua_trang rjmp jump_dau_trang jump_giua_trang: rjmp giua_trang jump_dau_trang: ; tim den dia chi cot NUM_COL va dia chi LED V_NUM_COL lds YL, NUM_MATRIX_COL sub YL, V_NUM_COL subi YL, 1 ldi r16, 4*8 ; nhan gia tri nay voi 4 - vi moi cot ma tran cach nhau 4 don vi mul YL, r16 ; nhan tiep voi 8 vi moi vi tri co 8 LED ~ x32 movw YH:YL, r1:r0 ldi r16, 7 ; cong tiep voi gia tri con tro LED sub r16, V_NUM_LED clr r17 add YL, r16 adc YH, r17 ; phan le cua con tro du lieu cua ma tran da duoc xac dinh trong YH:YL movw r25:r24, YH:YL ; luu lai dia chi ldi r18, 0 ; i = 0..3 lap1: movw YH:YL, r25:r24 lds r17, H_OFFSET_MATRIX lds r16, L_OFFSET_MATRIX mul r16, r18 movw r3:r2, r1:r0 mul r17, r18 add r3, r0 lds XL, L_MATRIX_SCREEN_1 ; dia chi goc lds XH, H_MATRIX_SCREEN_1 add XL, r2 adc XH, r3 add XL, YL adc XH, YH ; XH:XL tro den dung dia chi DATA OUT roi movw ZH:ZL, XH:XL ; luu con tro nay lai ldi r19, 0 ; j = 0..3 lap2: ; tim den dau dia chi du lieu trong DATA IN de lay du lieu lds YH, H_OFFSET_DATA_16 lds YL, L_OFFSET_DATA_16 mul YL, r19 movw r3:r2, r1:r0 mul YH, r19 add r3, r0 movw YH:YL, r3:r2 lds r17, H_OFFSET_DATA_4 lds r16, L_OFFSET_DATA_4 mul r16, r18 movw r3:r2, r1:r0 mul r17, r18 add r3, r0 add YL, r2 adc YH, r3 lds r17, H_DATA_SCAN lds r16, L_DATA_SCAN add YL, r16 adc YH, r17 movw XH:XL, ZH:ZL ; tang them 8 byte ldi r16, 8 mul r16, r19 add XL, r0 adc XH, r1 ; copy cac byte le vao truoc mov r16, V_NUM_LED lap3: ld r17, Y+ st X+, r17 subi r16, 1 brpl lap3 ; sau do copy cac 8 byte vao sau mov r16, V_NUM_COL lap4: cpi r16, 0 breq thoat subi r16, 1 adiw XH:XL, 24 ; tang them 24 byte de offset sang cot ben canh ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 ld r17, Y+ st X+, r17 rjmp lap4 thoat: inc r19 cpi r19, 4 brne lap2 inc r18 cpi r18, 4 brne jump_lap1 rjmp scan_1_page_loop_0 jump_lap1: rjmp lap1 giua_trang: cuoi_trang: scan_1_page_loop_0: sei sbi PORTB, OE ; bat rcall DELAY_1_US ; goi ham nay de ngat TIMER1 xay ra tai day cbi PORTB, OE ; tat - de chuyen trang rcall DELAY_1_US rcall DELAY_1_US rcall DELAY_1_US cli ; cam ngat khi het 1 trang de dam bao do sang deu cbi PORTB, OE ; tat - de chuyen trang lds r16, V_NUM_SCAN lds r17, MOVE_SPEED cp r16, r17 ; kiem tra so lan da quet 1 trang (thoi gian hien thi) brne scan_1_page_loop_0 ; brlt - khong lam viec??????? chuối déo chịu ; doi trang lds r16, L_MATRIX_SCREEN_0 lds r17, H_MATRIX_SCREEN_0 lds r18, L_MATRIX_SCREEN_1 lds r19, H_MATRIX_SCREEN_1 sts L_MATRIX_SCREEN_1, r16 sts H_MATRIX_SCREEN_1, r17 sts L_MATRIX_SCREEN_0, r18 sts H_MATRIX_SCREEN_0, r19 ; tang con tro LED inc V_NUM_LED mov r16, V_NUM_LED cpi r16, 8 ; so LED trong 1 con 74HC595 brlt jump_thay_doi_1_vi_tri_LED clr V_NUM_LED ; tang cot len 1 inc V_NUM_COL mov r16, V_NUM_COL lds r17, SUM_MATRIX_DATA_COL cp r16, r17 brne jump_thay_doi_1_vi_tri_LED rjmp ket_thuc ; ket thuc jump_thay_doi_1_vi_tri_LED: rjmp thay_doi_1_vi_tri_LED ket_thuc: ret
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