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cores/spi/spi_master: Return raw/aligned mode on status register.

This commit is contained in:
Florent Kermarrec 2023-02-06 13:08:53 +01:00
parent a6d9955c9d
commit 61bbfa3eaa
1 changed files with 7 additions and 1 deletions
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8
litex/soc/cores/spi/spi_master.py
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@ -22,6 +22,7 @@ class SPIMaster(Module, AutoCSR):
pads_layout = [("clk", 1), ("cs_n", 1), ("mosi", 1), ("miso", 1)] pads_layout = [("clk", 1), ("cs_n", 1), ("mosi", 1), ("miso", 1)]
def __init__(self, pads, data_width, sys_clk_freq, spi_clk_freq, with_csr=True, mode="raw"): def __init__(self, pads, data_width, sys_clk_freq, spi_clk_freq, with_csr=True, mode="raw"):
assert mode in ["raw", "aligned"] assert mode in ["raw", "aligned"]
self.mode = mode
if pads is None: if pads is None:
pads = Record(self.pads_layout) pads = Record(self.pads_layout)
if not hasattr(pads, "cs_n"): if not hasattr(pads, "cs_n"):
@ -147,12 +148,17 @@ class SPIMaster(Module, AutoCSR):
CSRField("length", size=8, offset=8, description="SPI Xfer Length (in bits).") CSRField("length", size=8, offset=8, description="SPI Xfer Length (in bits).")
]) ])
self._status = CSRStatus(description="SPI Status.", fields=[ self._status = CSRStatus(description="SPI Status.", fields=[
CSRField("done", size=1, offset=0, description="SPI Xfer Done (when read as ``1``).") CSRField("done", size=1, offset=0, description="SPI Xfer Done (when read as ``1``)."),
CSRField("mode", size=1, offset=1, description="SPI mode", values=[
("``0b0``", "Raw : MOSI transfers aligned on core's data-width."),
("``0b1``", "Aligned: MOSI transfers aligned on transfers' length."),
]),
]) ])
self.comb += [ self.comb += [
self.start.eq(self._control.fields.start), self.start.eq(self._control.fields.start),
self.length.eq(self._control.fields.length), self.length.eq(self._control.fields.length),
self._status.fields.done.eq(self.done), self._status.fields.done.eq(self.done),
self._status.fields.mode.eq({"raw": 0b0, "aligned": 0b1}[self.mode]),
] ]
# MOSI/MISO. # MOSI/MISO.