Algorithm baud rate decoder with the help of counter

[isaac12345]

Help with algorithm for baud rate decoder with the help of counter

Hi,

I need to make a baud rate decoder which takes a 16bit input from the output of a down counter. The down counter is simply enabled by a controller at a certain point and then stopped after some time, after which the baud rate decoder is enabled which calculates the baud rate and enables one of the 7 output lines, each line signifying a baud rate(300,600,1200 till 19200).

What I cant understand is how can I use the counter's value to calculate the baud rate? As I understand, a counter gives a binary value which represents time. As I know the number of bits that it counts over, should I simply have my baud rate decoder divide the number of bits by the counter's value?

I'm coding in VHDL.

 

[isaac12345]

*bump*

Anyone??

 

[std_match]

It is difficult to understand what you want.
What clock frequency are you feeding to the counter?
What UART do you have? Most UART's want a clock frequency 16 times higher than the baud rate. If you design your own UART you should use a clock frequency at least 3 times higher than the baud rate.

 

[thothefali]

I’m using microcontroller Atmel at89c52. I need to make an interface with a wireless sensor via serial port with 19200 baud rate
I have used 11.0592 MHz Crystal but the uC didn't respond for send or receive
Is there any problem with this code for serial please?

; FUNCTIONS/SUBROUTINES
SERIAL1:
MOV A, PCON
SETB ACC.7
MOV PCON, A
MOV TMOD, #20H; timer1 mode 2
MOV TH1, #0FDH
MOV SCON, #50H ; 8-BIT, 1 STOP BIT, REN ENABLED
SETB TCON.6
CLR TI
MOV SBUF, A
H_1: JNB TI, H_1
RET