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Mot dieu dac biet o PortA ma moi nguoi can phai chu y: sau khi Reset hoac bat dau mot chuong trinh thi PortA( 5 pin RA4,RA3,RA2,RA1,RA0), va hai pin RB7,RB6 ko phai la dang I/O nua ma la analog input
va trang thai nay duoc quy dinh boi thanh ghi ANSEL (9bh) ( cac ban tham khao them o trang 51 datasheet)
Do do de ban dau thiet lap trang thai cua cac chan nay la dang I/O thi ta phai
CLRF ANSEL
Den day moi thiet lap trang thai I/O:
Do la nhung loi tuong nhu nho nhat, nhung rat de mac phai doi voi nhung newbie, Rat mong duoc su hop tac cua moi nguoi
thay đổi nội dung bởi: mafd_47a, 08-10-2005 lúc 01:54 AM.
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