litex/test/test_spi.py

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# This file is Copyright (c) 2019 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD
import unittest
from migen import *
from litex.soc.cores.spi import SPIMaster
class TestSPI(unittest.TestCase):
def test_spi_master_syntax(self):
spi_master = SPIMaster(pads=None, data_width=32, sys_clk_freq=100e6, spi_clk_freq=5e6)
self.assertEqual(hasattr(spi_master, "pads"), 1)
def test_spi_xfer_loopback(self):
def generator(dut):
yield dut.loopback.eq(1)
yield dut.mosi.eq(0xdeadbeef)
yield dut.length.eq(32)
yield dut.start.eq(1)
yield
yield dut.start.eq(0)
yield
while (yield dut.done) == 0:
yield
self.assertEqual((yield dut.miso), 0xdeadbeef)
dut = SPIMaster(pads=None, data_width=32, sys_clk_freq=100e6, spi_clk_freq=5e6, with_control=False)
run_simulation(dut, generator(dut))