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[/] [uart16550/] [trunk/] [rtl/] [verilog/] [uart_top.v] - Rev 106

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Rev Log message Author Age Path
106 New directory structure. root 5535d 01h /uart16550/trunk/rtl/verilog/uart_top.v
84 The uart_defines.v file is included again in sources. gorban 7950d 14h /uart16550/trunk/rtl/verilog/uart_top.v
79 Bug Fixes:
* Possible loss of sync and bad reception of stop bit on slow baud rates fixed.
Problem reported by Kenny.Tung.
* Bad (or lack of ) loopback handling fixed. Reported by Cherry Withers.

Improvements:
* Made FIFO's as general inferrable memory where possible.
So on FPGA they should be inferred as RAM (Distributed RAM on Xilinx).
This saves about 1/3 of the Slice count and reduces P&R and synthesis times.

* Added optional baudrate output (baud_o).
This is identical to BAUDOUT* signal on 16550 chip.
It outputs 16xbit_clock_rate - the divided clock.
It's disabled by default. Define UART_HAS_BAUDRATE_OUTPUT to use.		 gorban 7957d 12h /uart16550/trunk/rtl/verilog/uart_top.v
65 Warnings fixed (unused signals removed). mohor 8173d 03h /uart16550/trunk/rtl/verilog/uart_top.v
50 Bug in LSR[0] is fixed.
All WISHBONE signals are now sampled, so another wait-state is introduced on all transfers.		 gorban 8185d 20h /uart16550/trunk/rtl/verilog/uart_top.v
48 Updated specification documentation.
Added full 32-bit data bus interface, now as default.
Address is 5-bit wide in 32-bit data bus mode.
Added wb_sel_i input to the core. It's used in the 32-bit mode.
Added debug interface with two 32-bit read-only registers in 32-bit mode.
Bits 5 and 6 of LSR are now only cleared on TX FIFO write.
My small test bench is modified to work with 32-bit mode.		 gorban 8188d 13h /uart16550/trunk/rtl/verilog/uart_top.v
37 Heavily rewritten interrupt and LSR subsystems.
Many bugs hopefully squashed.		 gorban 8214d 17h /uart16550/trunk/rtl/verilog/uart_top.v
33 Small synopsis fixes gorban 8233d 01h /uart16550/trunk/rtl/verilog/uart_top.v
30 Modified port names again gorban 8288d 19h /uart16550/trunk/rtl/verilog/uart_top.v
29 Things connected to parity changed.
Clock devider changed.		 mohor 8289d 14h /uart16550/trunk/rtl/verilog/uart_top.v
27 Stop bit bug fixed.
Parity bug fixed.
WISHBONE read cycle bug fixed,
OE indicator (Overrun Error) bug fixed.
PE indicator (Parity Error) bug fixed.
Register read bug fixed.		 mohor 8290d 19h /uart16550/trunk/rtl/verilog/uart_top.v

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