From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Sun, 1 Mar 2015 08:53:51 +0000 (+0100)
Subject: litescope: avoid uart code duplication
X-Git-Tag: 24jan2021_ls180~2553
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=32fce11edf1ecba6102f36a90f6600bf982e85e9;p=litex.git

litescope: avoid uart code duplication
---

diff --git a/misoclib/tools/litescope/bridge/uart2wb.py b/misoclib/tools/litescope/bridge/uart2wb.py
index b78dc8b3..b39d4951 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):