Hi! i'm a college student.Now is the time i doing my Final year Project.
my project is using 8052 connect to PC by RS232 and sending the data to UART(8250a) . then, the UART send the data to modem .

so ,my problem :

1)how do i write the ASM languge to tell the 8052 get data from PC?
can some one giving me some Example in asm language?

2)how the 8052 call the modem ?by AT command?if by AT command,how do i write it?i need some example to finish this project.

thank for kindly helping me.

Lim