soc/cores: fix spi

litex/soc/cores/spi/__init__.py

@@ -1 +1 @@
-from litex.soc.spi.core import SPIMaster
+from litex.soc.cores.spi.core import SPIMaster

litex/soc/cores/spi/core.py

@@ -1,6 +1,5 @@
 from litex.gen import *
-from litex.gen.bank.description import *
+from litex.soc.interconnect.csr import *
-from litex.gen.genlib.fsm import FSM, NextState
 
 
 class SPIMaster(Module, AutoCSR):

litex/soc/cores/spi/test.py

@@ -1,86 +0,0 @@
-from litex.gen import *
-from litex.gen.genlib.record import *
-from litex.gen.sim.generic import run_simulation
-
-from litex.soc.com.spi import SPIMaster
-
-
-class SPISlave(Module):
-    def __init__(self, pads, width):
-        self.pads = pads
-        self.width = width
-
-        ###
-
-        self.mosi = 0
-        self.miso = 0
-
-        self.last_cs_n = 1
-        self.last_clk = 0
-
-
-    def get_mosi(self):
-        return self.mosi
-
-    def set_miso(self, value):
-        self.miso = value
-
-    def do_simulation(self, selfp):
-        # detect edges
-        cs_n_rising = 0
-        cs_n_falling = 0
-        clk_rising = 0
-        clk_falling = 0
-        if selfp.pads.cs_n and not self.last_cs_n:
-            cs_n_rising = 1
-        if not selfp.pads.cs_n and self.last_cs_n:
-            cs_n_falling = 1
-        if selfp.pads.clk and not self.last_clk:
-            clk_rising = 1
-        if not selfp.pads.clk and self.last_clk:
-            clk_falling = 1
-
-        # input mosi
-        if clk_falling and not selfp.pads.cs_n:
-            self.mosi = self.mosi << 1
-            self.mosi |= selfp.pads.mosi
-
-        # output miso
-        if (clk_rising and not selfp.pads.cs_n):
-            selfp.pads.miso = (self.miso >> (self.width-1)) & 0x1
-            self.miso = self.miso << 1
-
-        # save signal states
-        self.last_cs_n = selfp.pads.cs_n
-        self.last_clk = selfp.pads.clk
-
-
-def spi_access(selfp, length, mosi):
-    selfp.spi_master._mosi.storage = mosi
-    yield
-    selfp.spi_master._ctrl.r = (length << 8) | 1
-    selfp.spi_master._ctrl.re = 1
-    yield
-    selfp.spi_master._ctrl.r = 0
-    selfp.spi_master._ctrl.re = 0
-    yield
-    while not (selfp.spi_master._status.status & 0x1):
-        yield
-
-
-class TB(Module):
-    def __init__(self):
-        pads = Record([("cs_n", 1), ("clk", 1), ("mosi", 1), ("miso", 1)])
-        self.submodules.spi_master = SPIMaster(pads, 24, 4)
-        self.submodules.spi_slave = SPISlave(pads, 24)
-
-    def gen_simulation(self, selfp):
-        for i in range(16):
-            yield
-        self.spi_slave.set_miso(0x123457)
-        yield from spi_access(selfp, 8, 0x123457)
-        print("{:08x}".format(self.spi_slave.get_mosi()))
-        print("{:08x}".format(selfp.spi_master._miso.status))
-
-if __name__ == "__main__":
-    run_simulation(TB(), ncycles=1000, vcd_name="my.vcd", keep_files=True)