diff --git a/misoclib/tools/litescope/bridge/uart2wb.py b/misoclib/tools/litescope/bridge/uart2wb.py index b78dc8b30..b39d49514 100644 --- a/misoclib/tools/litescope/bridge/uart2wb.py +++ b/misoclib/tools/litescope/bridge/uart2wb.py @@ -7,99 +7,7 @@ from migen.bank.eventmanager import * from migen.genlib.record import Record from migen.flow.actor import Sink, Source -class UARTRX(Module): - def __init__(self, pads, tuning_word): - self.source = Source([("d", 8)]) - - ### - - uart_clk_rxen = Signal() - phase_accumulator_rx = Signal(32) - - rx = Signal() - self.specials += MultiReg(pads.rx, rx) - rx_r = Signal() - rx_reg = Signal(8) - rx_bitcount = Signal(4) - rx_busy = Signal() - rx_done = self.source.stb - rx_data = self.source.d - self.sync += [ - rx_done.eq(0), - rx_r.eq(rx), - If(~rx_busy, - If(~rx & rx_r, # look for start bit - rx_busy.eq(1), - rx_bitcount.eq(0), - ) - ).Else( - If(uart_clk_rxen, - rx_bitcount.eq(rx_bitcount + 1), - If(rx_bitcount == 0, - If(rx, # verify start bit - rx_busy.eq(0) - ) - ).Elif(rx_bitcount == 9, - rx_busy.eq(0), - If(rx, # verify stop bit - rx_data.eq(rx_reg), - rx_done.eq(1) - ) - ).Else( - rx_reg.eq(Cat(rx_reg[1:], rx)) - ) - ) - ) - ] - self.sync += \ - If(rx_busy, - Cat(phase_accumulator_rx, uart_clk_rxen).eq(phase_accumulator_rx + tuning_word) - ).Else( - Cat(phase_accumulator_rx, uart_clk_rxen).eq(2**31) - ) - -class UARTTX(Module): - def __init__(self, pads, tuning_word): - self.sink = Sink([("d", 8)]) - - ### - - uart_clk_txen = Signal() - phase_accumulator_tx = Signal(32) - - pads.tx.reset = 1 - - tx_reg = Signal(8) - tx_bitcount = Signal(4) - tx_busy = Signal() - self.sync += [ - self.sink.ack.eq(0), - If(self.sink.stb & ~tx_busy & ~self.sink.ack, - tx_reg.eq(self.sink.d), - tx_bitcount.eq(0), - tx_busy.eq(1), - pads.tx.eq(0) - ).Elif(uart_clk_txen & tx_busy, - tx_bitcount.eq(tx_bitcount + 1), - If(tx_bitcount == 8, - pads.tx.eq(1) - ).Elif(tx_bitcount == 9, - pads.tx.eq(1), - tx_busy.eq(0), - self.sink.ack.eq(1), - ).Else( - pads.tx.eq(tx_reg[0]), - tx_reg.eq(Cat(tx_reg[1:], 0)) - ) - ) - ] - self.sync += [ - If(tx_busy, - Cat(phase_accumulator_tx, uart_clk_txen).eq(phase_accumulator_tx + tuning_word) - ).Else( - Cat(phase_accumulator_tx, uart_clk_txen).eq(0) - ) - ] +from misoclib.com.uart import UARTRX, UARTTX class UART(Module, AutoCSR): def __init__(self, pads, clk_freq, baud=115200):