litex-boards/litex_boards/platforms/qmtech_daughterboard.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2023 Kazumoto Kojima
# Copyright (c) 2023 Hans Baier <hansfbaier@gmail.com>
#
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import Subsignal, Pins, IOStandard, Misc
# SevenSeg -----------------------------------------------------------------------------------------
from migen import *
from litex.gen.genlib.misc import WaitTimer
from litex.soc.interconnect.csr import AutoCSR, CSRStorage
class SevenSeg(Module, AutoCSR):
def __init__(self, segs, sels, sys_clk_freq, period=1e-2):
self.segs = segs
self.sels = sels
n = len(sels)
self._out = CSRStorage(4*n, description="7 Seg LEDs Control.")
xdigits = Signal(4*n)
select = Signal(n)
count = Signal(max=n)
table = [
0x3f, 0x06, 0x5b, 0x4f,
0x66, 0x6d, 0x7d, 0x07,
0x7f, 0x6f, 0x77, 0x7c,
0x39, 0x5e, 0x79, 0x71
]
abcdefg = Signal(8)
hexa = Signal(4)
cases = {}
for i in range(16):
cases[i] = abcdefg.eq(table[i])
self.comb += Case(hexa, cases)
timer = WaitTimer(period*sys_clk_freq/(2*n))
self.submodules += timer
self.comb += timer.wait.eq(~timer.done)
self.sync += If(timer.done,
If(count == n-1,
count.eq(0),
select.eq(1 << (n-1)),
xdigits.eq(self._out.storage)
).Else(
count.eq(count + 1),
select.eq(select >> 1),
xdigits.eq(xdigits >> 4)
)
)
self.comb += [
hexa.eq(xdigits[0:4]),
segs.eq(~abcdefg),
sels.eq(select)
]
class QMTechDaughterboard:
"""
the QMTech daughterboard contains standard peripherals
and can be used with a number of different FPGA core boards
source: https://www.aliexpress.com/item/1005001829520314.html
"""
def __init__(self, io_standard) -> None:
"""
because the board can be used with FPGAs core boards from
different vendors, the constructor needs the vendor specific IOStandard
"""
self.io = [
("serial", 0,
Subsignal("rx", Pins("J2:16")),
Subsignal("tx", Pins("J2:15")),
io_standard
),
("user_led", 0, Pins("J2:40"), io_standard),
("user_led", 1, Pins("J2:39"), io_standard),
("user_led", 2, Pins("J2:38"), io_standard),
("user_led", 3, Pins("J2:37"), io_standard),
("user_led", 4, Pins("J2:36"), io_standard),
("user_btn", 0, Pins("J3:7"), io_standard),
("user_btn", 1, Pins("J2:44"), io_standard),
("user_btn", 2, Pins("J2:43"), io_standard),
("user_btn", 3, Pins("J2:42"), io_standard),
("user_btn", 4, Pins("J2:41"), io_standard),
# GMII Ethernet
("eth_clocks", 0,
Subsignal("tx", Pins("J3:22")),
Subsignal("gtx", Pins("J3:29")),
Subsignal("rx", Pins("J3:37")),
io_standard
),
("eth", 0,
# rst is hardwired on the board
#Subsignal("rst_n", Pins("-")),
Subsignal("int_n", Pins("J3:26")),
Subsignal("mdio", Pins("J3:15")),
Subsignal("mdc", Pins("J3:16")),
Subsignal("rx_dv", Pins("J3:42")),
Subsignal("rx_er", Pins("J3:32")),
Subsignal("rx_data", Pins("J3:41 J3:40 J3:39 J3:38 J3:36 J3:35 J3:34 J3:33")),
Subsignal("tx_en", Pins("J3:28")),
Subsignal("tx_er", Pins("J3:17")),
Subsignal("tx_data", Pins("J3:27 J3:25 J3:24 J3:23 J3:21 J3:20 J3:19 J3:18")),
Subsignal("col", Pins("J3:31")),
Subsignal("crs", Pins("J3:30")),
io_standard
),
# Seven Segment
("seven_seg_ctl", 0, Pins("J2:33"), io_standard),
("seven_seg_ctl", 1, Pins("J2:27"), io_standard),
("seven_seg_ctl", 2, Pins("J2:35"), io_standard),
("seven_seg", 0, Pins("J2:31 J2:26 J2:28 J2:32 J2:34 J2:29 J2:25 J2:30"), io_standard),
# VGA
("vga", 0,
Subsignal("hsync_n", Pins("J3:44")),
Subsignal("vsync_n", Pins("J3:43")),
Subsignal("r", Pins("J3:57 J3:56 J3:59 J3:58 J3:60")),
Subsignal("g", Pins("J3:51 J3:50 J3:53 J3:52 J3:54 J3:55")),
Subsignal("b", Pins("J3:46 J3:45 J3:48 J3:47 J3:49")),
io_standard
),
# PullUp resistors are on the board, so we don't need them in the FPGA
("sdcard", 0,
Subsignal("data", Pins("J3:10 J3:9 J3:14 J3:13")),
Subsignal("cmd", Pins("J3:12")),
Subsignal("clk", Pins("J3:11")),
Subsignal("cd", Pins("J3:8")),
io_standard,
),
]
connectors = [
("pmoda", "J2:17 J2:19 J2:21 J2:23 J2:18 J2:20 J2:22 J2:24"), #J10
("pmodb", "J2:7 J2:9 J2:11 J2:13 J2:8 J2:10 J2:12 J2:14"), #J11
("J1", {
3: "J2:60",
4: "J2:59",
5: "J2:58",
6: "J2:57",
7: "J2:56",
8: "J2:55",
9: "J2:54",
10: "J2:53",
11: "J2:52",
12: "J2:51",
13: "J2:50",
14: "J2:49",
15: "J2:48",
16: "J2:47",
17: "J2:46",
18: "J2:45"
}),
]