[Darpan]

i am trying to interface touchscreen with p89v51rd2 which does not have an adc onboard.

The problem with interfacing an external adc with the muc is that the polling sequence of touchscreen requires you  to ground a pin and in the next sequence check the same pin for analog voltage.

If i give touchscreen wire as my adc input, how am i suppose to ground it for polling the other axis..

kindly help if someone has a solution for this

[Darpan]

Hello,
I have made data transfer between two microcontrollers using ask modules.
I had used encoder and decoder ic on transmitter uc and receiver uc respectively.
Can anyone help me on how to do data transfer using max232(i.e from UART) to microcontroller using ask modules.??

 

[Darpan]

Yes, have to make some changes , would post it here soon.

[Darpan]

Hello,

Exactly there was a mistake in my logic..in fact in delays..

Thanks

[Darpan]

Hello A M Bhatt,

I understood what you are trying to say..
But then can you suggest me how to proceed?

Can you provide me with some block diagram or some circuit ?

Or how to interface with HT12e and d?

Thanks

[Darpan]

Hello,

How should i use these encoder ic?

they have 4 inputs which they combine and make a serial combination?

why should i use that when i am getting a serial output from uart?

Thanks

[Darpan]

I am designing pc controlled

that means through UART.

Max232 is being used and ask transmitter is connected to it,which is used to send character using uart.
and ask receiver is used on the microcontroller side, it is connected to RX terminal of my controller..

[Darpan]

But do i still need to use those encoder and decoder ic when i am using microcontroller??

[Darpan]

Hello alfred,

I have understood those commands ..
bt the doubt is like how to make it communicate with hyperterminal?

unlike gps and gsm module which i directly connected to hyperterminal without my controller..
so how to make my sd card communicate with the controller?
how will it take commands from my pc hyperterminal when i have my memory card interfaced with spis?

[Darpan]

Also can anyone give me the total ckt required to connect 1gb memory card to hyperterminal ysing max232
i am using p89v51rd2 which supports spi

 

[Darpan]

Can anyone send me the circuit required to connect memory card of 1gb to pc’s hyperterminal..

i know we have to use max232..
but how to connect memory card to it?

do we have to connect memory card to muc and muc to max 232?
Can someone help

 

[Darpan]

Hello,
Actually I have another version of 8051 of philips company, that supports spi communication.

[Darpan]

Thanks a lot sir,

I connected a resistor of 10k in series and now the reed is working fine..
Thanks for the help.

[Author]

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