Problem with GSM switch and 89c51

I have to make this project for my school but i can't make it run. I've problems with message extraction and with the interrupt. Please help. This is my code #include <reg51.h> #include <string...
Problem with GSM switch and 89c51

I have to make this project for my school but i can't make it run. I've problems with message extraction and with the interrupt. Please help. This is my code #include <reg51.h> #include <string...
How long does it take to switch working states?

Hi everyone! I usually use the instruction CPS to switch working states form PL1 to PL0, or switch between PL1s. How long does CPS take? Thanks.
How to Interface AT24C04 with 89C51

Please send me a detailed diagram of the connection and the corresponding C/C++ and Asembly program to embed in the microcontroller . I will be very much obliged if help me at the earliest. Thank you...
How to Interface AT24C04 with 89C51

Please send me a detailed diagram of the connection and the corresponding C/C++ and Asembly program to embed in the microcontroller . I will be very much obliged if help me at the earliest. Thank you...