how serial to parallel conversion

[ehsanelahimirza]

hi all

plz tell me how to convert data output from serial ports to parallel data

which ICs are usually used and how the Baud Rate is adjusted for conversion purpose

 

[the_risk_master]

The 74ALS164A is what you need, A serial-in/parallel-out shift register is similar to the serial-in/ serial-out shift register in that it shifts data into internal storage elements and shifts data out at the serial-out, data-out, pin. It is different in that it makes all the internal stages available as outputs. Therefore, a serial-in/parallel-out shift register converts data from serial format to parallel format.

 

[ehsanelahimirza]

how the Baud Rate is adjusted

 

[budhy]

how to convert data output from serial ports to parallel data

Do you mean PC Serial Data Port (COM port)?
If so then you need UART (Universal Asynchronous Reciever/Transmitter).
Normally UART is build inside the microcontroller chip (years ago there stand alone UART chip).

It is easy build that circuit, you need 1 20 pin AT89C2051 Microcontroller chip, 1 MAX232 TTL-RS232 Volatage Translator chip, 1 cristal. If you interested, I'll send you the schematic and source program to build one.

 

[ehsanelahimirza]

yes i want to convert data from PC com port

i m trying to get TIME out of serial port using assembly and then want to convert it to 7 segment LED displays

more ideas and help plz

 

[budhy]

TIME out of serial port using assembly and then want to convert it to 7 segment LED displays

How many digit do you want for your 7 segment LED Display?

 

[ehsanelahimirza]

all the thing is to display time that is

min from 00--->59
hour from 00--->24 or 12


59 consists upon 6 bits of data so max number of data bits used will be 6
if i want to display minutes and hours one by one

but if i want to send both minutes and hours at output simultaneously then i will need 6+5=11 bits

then how i could do that
thanks in advance for help

 

[budhy]

59 consists upon 6 bits of data so max number of data bits used will be 6
if i want to display minutes and hours one by one

but if i want to send both minutes and hours at output simultaneously then i will need 6+5=11 bits

PC COM port transmit 8 bits each time.

you transmit a 8 bit data 4 times to transmit whole minute and hour data

 

[ehsanelahimirza]

then how to do serial to parallel conversion which microcontroller or IC to be used
plz explain all the thing

 

[budhy]

This is the circuit to interface PC COM port to Serial to Parallel Coverter plus 4 digit 7 segment display

Serial to Parallel Coverter plus 4 digit 7 segment display circuit

 

[ehsanelahimirza]

which kind of y1 is

how to adjust its frequency

 

[budhy]

which kind of y1 is

No special specification xtal

how to adjust its frequency

Baud rate is adjusted from the program inside AT89C2051

 

[ehsanelahimirza]

now the last thing


if u plz send me the code or exe which is to be burnt ob 8051