Uart=Stands for Universal Asynchronous Reception and Transmission (UART)
A simple serial communication protocol that allows the host communicates with the auxiliary device.
UART supports bi-directional, asynchronous and serial data transmission.
It has two data lines, one to transmit (TX) and another to receive (RX) which is used to communicate through digital pin 0, digital pin 1.
A simple UART_tx for use in an FPGA as a debug engine. Requires a 100MHz input clk.
in my design perity bit is not used.
start bit-1bit.
data bits-8bits.
stop bits - 1bit.
trig
reset
clk
8-bit data input
have 11 states - idle, stsrt,st0,st1,st2,st3,st4,st5,st6,st7,stop
tx
when rst=1, then signal is going to idle state where tx=1.
after rst=0 and trig=1, then signal goes to start signal, tx=0.
and then passing the data_in 8 bit till st0 to st7 .
after st7 it is go to stop state if here trig=1, its mean next data is avialabel then its go to statr state and repeat this again and id trig=0; then ti is stable in stop state
default is idle state
- when one data is send
2)when continue two set of data send
Teekam Chand Khandelwal
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