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ethernet
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5 Commits

Author SHA1 Message Date
Sean Anderson 58cebe5ac2 uart_tx: Fix AXIS handshaking 
AXI stream data is transferred based on the current values of the signals,
not the previous ones. This will cause problems if the other end isn't
valid all the time. Fix this, and amend the testbench to test it.

Fixes: e44d381 ("Add UART transmit module")
Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2023-03-05 14:30:07 -05:00
Sean Anderson d89fd13238 tb: uart_tx: Check stop bit 
Ensure that the stop bit is asserted at the end of each character.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2023-03-04 13:39:09 -05:00
Sean Anderson 7110eee136 tb: uart_tx: Export getchar 
This function is useful for other testbenches. Export it.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2023-03-04 13:38:38 -05:00
Sean Anderson d44c5b257e uart_tx: Add reset 
Add a reset to match uart_rx.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2023-03-04 12:37:54 -05:00
Sean Anderson e44d381c20 Add UART transmit module 
I join everyone and their mother in creating my own UART. 8n1 only, and 2
baud rates. Accepts AXI-stream.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2023-02-28 22:26:05 -05:00