Hi Group, We are a group of four B.E students studying in M.h.S.S. COE, Mumbai, India. We writing to you to seek some help and guidance. Since this is our first microcontroller based project, we are unaware about the practicalities and methodologies that go into it. In our project, we have decided to use the following: AT89C52/AT89S52: MICROCONTROLLER DS1307: RTC MAX232/MAX485: LEVEL CONVERTER AT24C1024: SERIAL EEPROM
4051B: 8:1 ANALOG MUX IC 741/ LM324: COMPARATORLOGIC: 8 channels connected to the MUX, depending on which input is enables, MUX selects it and sends it to the COMPARATOR. The second input to comparator is a reference voltage. Comparator's output to port
1.0. Ports 1.1,1.2,1.3 as selects lines to MUX. Ports 1.4,1.5 for intefacing with memory. Ports 3.0,3.1 as RXD and TXD. Ports 3.2,3.3,3.4for interfacing with RTC. Using select lines of MUX , we wish to determine which channel is enabled. using RTC we wish to sore the real time and pin number in EEPROM. Using
RS232C we wish to display this data on a PC.
We are facing the following queries:
- Is our logic correct? Are all the Ic's comaptible?
- Useful tips from your side.
We are in the stage of preparing the circuit diagram and there are many
doubts which occur. We would like you to suggest software for preparing schematics and layout. Is there some software available which
directly converts schematic to layout? Please give names.
The next challenge is the software side. In our syllabus we have learnt
C/C++. Since you have mastered this, please guide us how to write the programs and routines and recommend compliers, simulators and other software related to programming. Are programs and codes available on net? If yes, Please give the resource locations or websites.
Any help will be really encouraging and greatly appreicated by us. We look forward for some positive response. Last but not the least, we wish you a very happy and prosperous new year. Thanking you and with best regards, Adam Mashraqui. (on behalf of the group)