[nguyenhung1811]

so do mach cua minh.
con nua khi khai bao #use i2c(master, sda=pin_c4,scl=pin_c3) thi no ghi duoc, con khai bao
#use i2c(master, sda=pin_c4,scl=pin_c3,force_hw) thì nó khong chạy duoc, minh dung pic 16f877a..