interfacing microcontroller with UART(8250) - Electronic Circuits Projects Diagrams Free

jam_mafia · 22nd February 2006, 11:32 AM

hey hi all
i wanna do a project with a gsm modem connected to the serial port.thru which we can control home appliances from anywhere in the world, i initially wanted to use pc but coz its not portable want to swap pc with the following setup
a uart,microcontroller,eprom
i ask u guys how can i do it?
how can i interface uart with microcontroller?
how can i interface eprom with microcontroller?
can i get the circuits?if yes,plzzzzz post me the links
where can i get the required information??

**Nigel Goodwin** · 22nd February 2006, 11:36 AM

Many micro-controllers already have internal UART's, or if not, it's VERY simple to create one in software, it's also easy to connect an I2C EEPROM to one. I suggest you check my PIC tutorials which shows how to do both!.

jam_mafia · 22nd February 2006, 11:55 AM

thanx nigel for that but wat abt
how can i interface eprom with microcontroller?
post me the links please

**Nigel Goodwin** · 22nd February 2006, 12:10 PM

Quote:

Originally Posted by jam_mafia

thanx nigel for that but wat abt
how can i interface eprom with microcontroller?
post me the links please

What do you want an EPROM for? - sorry, I presumed you meant EEPROM (which would make more sense).

jam_mafia · 22nd February 2006, 03:54 PM

yeah its eeprom,so how to interface it with the microcontroller???

**Nigel Goodwin** · 22nd February 2006, 04:05 PM

Quote:

Originally Posted by jam_mafia

yeah its eeprom,so how to interface it with the microcontroller???

As I said above, via I2C, and see my PIC tutorials for details!.

jam_mafia · 22nd February 2006, 04:19 PM

thanx for that!!ur tutorial rocks.
i have a doudbt might be silly though,i saw a IR transreceiver board in ur tutorial can it be connected to serial port of pc?

jam_mafia · 22nd February 2006, 04:40 PM

i know that my doubt is silly but answer this nigel
can we connect the ir transreceiver to serial port of pc???(that mentioned in the tutorials)

johnsmith123 · 22nd February 2006, 08:10 PM

what microcontroller are you using?

PIC? AVR? 8051?
There are loads of tutorials and sample source on the internet.

I can help you if you tell me what micro you are using.

**Nigel Goodwin** · 22nd February 2006, 08:56 PM

Quote:

Originally Posted by jam_mafia

i know that my doubt is silly but answer this nigel
can we connect the ir transreceiver to serial port of pc???(that mentioned in the tutorials)

You could if you wanted! - but you would need to change the code accordingly.

jam_mafia · 23rd February 2006, 04:55 PM

i am using 8051 john.hope to c ur reply.
nigel i am using a M27128A-2F1(M8803)---EPROM
so how wud i interface this with 8051 microncontroller
u also said that these days we r getting microcontrollers with UARTS in them cud u gimmie the model number of that?

**Nigel Goodwin** · 23rd February 2006, 05:06 PM

Quote:

Originally Posted by jam_mafia

i am using 8051 john.hope to c ur reply.
nigel i am using a M27128A-2F1(M8803)---EPROM
so how wud i interface this with 8051 microncontroller

That's an EPROM, not an EEPROM - it's designed to interface to a micro-processor NOT a micro-controller, a micro-controller already has it's program memory internally.

What were you hoping to use the EPROM for?.

Quote:

u also said that these days we r getting microcontrollers with UARTS in them cud u gimmie the model number of that?

16F628, 16F877, 16F876 - to name just three common PIC's.

jam_mafia · 23rd February 2006, 05:16 PM

we basically wanted to control te home appliances thru a GSM modem whichn is actually connected to the serial port of the pc.so then we thought if a pc was used then it wud nt be portable so we wanted to shift to the so called microcontroller to actually interface it with the uart and eprom(wat wud u advice shud it be eprom or eeprom????),so we want to connect the whole setup to the gsm modem and operate from any where in the world,can it be done this way or is there any easy way out?????

**Nigel Goodwin** · 23rd February 2006, 05:32 PM

Quote:

Originally Posted by jam_mafia

we basically wanted to control te home appliances thru a GSM modem whichn is actually connected to the serial port of the pc.so then we thought if a pc was used then it wud nt be portable so we wanted to shift to the so called microcontroller to actually interface it with the uart and eprom(wat wud u advice shud it be eprom or eeprom????),so we want to connect the whole setup to the gsm modem and operate from any where in the world,can it be done this way or is there any easy way out?????

I see no reason for anything other than a single micro-controller?, EPROM's were used for program memory on micro-processors back in the 1970's, you would also need RAM chips and 'glue' logic chips to make a working computer.

A single micro-controller contains all that in a single, easy to use chip. Something like a PIC12F675 would do the entire project in one 8 pin chip, with hardly any support components required!.

jam_mafia · 23rd February 2006, 05:58 PM

thanx for that nigel but cud u please tell me more about PIC12F675 and the way in which we can actually make use of that????so how wud be the schematic?????wat else r needed???

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22nd February 2006, 11:32 AM	(permalink)
jam_mafia	interfacing microcontroller with UART(8250) hey hi all i wanna do a project with a gsm modem connected to the serial port.thru which we can control home appliances from anywhere in the world, i initially wanted to use pc but coz its not portable want to swap pc with the following setup a uart,microcontroller,eprom i ask u guys how can i do it? how can i interface uart with microcontroller? how can i interface eprom with microcontroller? can i get the circuits?if yes,plzzzzz post me the links where can i get the required information??

22nd February 2006, 11:36 AM	(permalink)
Nigel Goodwin	Many micro-controllers already have internal UART's, or if not, it's VERY simple to create one in software, it's also easy to connect an I2C EEPROM to one. I suggest you check my PIC tutorials which shows how to do both!. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

22nd February 2006, 11:55 AM	(permalink)
jam_mafia	but wat abt this? thanx nigel for that but wat abt how can i interface eprom with microcontroller? post me the links please

22nd February 2006, 03:54 PM	(permalink)
jam_mafia	ya its eep yeah its eeprom,so how to interface it with the microcontroller???

22nd February 2006, 04:19 PM	(permalink)
jam_mafia	thanku thanx for that!!ur tutorial rocks. i have a doudbt might be silly though,i saw a IR transreceiver board in ur tutorial can it be connected to serial port of pc?

22nd February 2006, 04:40 PM	(permalink)
jam_mafia	i know i know that my doubt is silly but answer this nigel can we connect the ir transreceiver to serial port of pc???(that mentioned in the tutorials)

22nd February 2006, 08:10 PM	(permalink)
johnsmith123	interfacing micro to PC what microcontroller are you using? PIC? AVR? 8051? There are loads of tutorials and sample source on the internet. I can help you if you tell me what micro you are using.

23rd February 2006, 04:55 PM	(permalink)
jam_mafia	8051 i am using 8051 john.hope to c ur reply. nigel i am using a M27128A-2F1(M8803)---EPROM so how wud i interface this with 8051 microncontroller u also said that these days we r getting microcontrollers with UARTS in them cud u gimmie the model number of that?

23rd February 2006, 05:16 PM	(permalink)
jam_mafia	from the start we basically wanted to control te home appliances thru a GSM modem whichn is actually connected to the serial port of the pc.so then we thought if a pc was used then it wud nt be portable so we wanted to shift to the so called microcontroller to actually interface it with the uart and eprom(wat wud u advice shud it be eprom or eeprom????),so we want to connect the whole setup to the gsm modem and operate from any where in the world,can it be done this way or is there any easy way out?????

23rd February 2006, 05:58 PM	(permalink)
jam_mafia	thanx thanx for that nigel but cud u please tell me more about PIC12F675 and the way in which we can actually make use of that????so how wud be the schematic?????wat else r needed???