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hw: foboot-bitstream: use correct dummy cycles for pvt,evt

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Use the correct number of dummy cycles for both pvt and evt.  The number
of dummy cycles for the hacker board is currently unknown.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-07-09 19:01:22 +08:00
parent 72254c9b75
commit 602f06d38c
1 changed files with 11 additions and 2 deletions
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13
hw/foboot-bitstream.py
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@ -158,6 +158,11 @@ _io_hacker = [
Subsignal("wp", Pins("A1"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("B1"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("F1 E1"), IOStandard("LVCMOS33")),
),
("clk48", 0, Pins("F5"), IOStandard("LVCMOS33"))
]
@ -794,13 +799,17 @@ class BaseSoC(SoCCore):
if platform.revision == "pvt" or platform.revision == "dvt":
spi_pads = platform.request("spiflash4x")
spi_size = 2*1024*1024
spi_dummy = 6
elif platform.revision == "evt":
spi_pads = platform.request("spiflash4x")
spi_size = 16*1024*1024
spi_dummy = 6
else:
spi_pads = platform.request("spiflash")
spi_pads = platform.request("spiflash4x")
spi_size = 2*1024*1024
self.submodules.litexspi = SpiFlash(spi_pads, with_bitbang=True, dummy=12)
raise ValueError("Please figure out what the correct number of dummy cycles is")
spi_dummy = 12 # Check if this is correct?!
self.submodules.litexspi = SpiFlash(spi_pads, with_bitbang=True, dummy=spi_dummy)
self.register_mem("spiflash", self.mem_map["spiflash"],
self.litexspi.bus, size=spi_size)