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Kasli-SoC: Forward external clock from SMA connector #173

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sb10q merged 1 commits from occheung/artiq-zynq:soc-sma-clkin into master 2022-03-09 13:55:17 +08:00
Conversation 2 Commits 1 Files Changed 1 +17
1 changed files with 17 additions and 0 deletions
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17
src/gateware/kasli_soc.py
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@ -96,6 +96,19 @@ def eem_iostandard(eem):
return IOStandard(eem_iostandard_dict[eem]) return IOStandard(eem_iostandard_dict[eem])
class SMAClkinForward(Module):
def __init__(self, platform):
sma_clkin = platform.request("sma_clkin")
sma_clkin_se = Signal()
cdr_clk_se = Signal()
cdr_clk = platform.request("cdr_clk")
self.specials += [
Instance("IBUFDS", i_I=sma_clkin.p, i_IB=sma_clkin.n, o_O=sma_clkin_se),
Instance("ODDR", i_C=sma_clkin_se, i_CE=1, i_D1=1, i_D2=0, o_Q=cdr_clk_se),
Instance("OBUFDS", i_I=cdr_clk_se, o_O=cdr_clk.p, o_OB=cdr_clk.n)
]
class GenericStandalone(SoCCore): class GenericStandalone(SoCCore):
def __init__(self, description, acpki=False): def __init__(self, description, acpki=False):
self.acpki = acpki self.acpki = acpki
@ -113,6 +126,8 @@ class GenericStandalone(SoCCore):
platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]") platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]")
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24") platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
self.submodules += SMAClkinForward(self.platform)
self.rustc_cfg["has_si5324"] = None self.rustc_cfg["has_si5324"] = None
self.rustc_cfg["si5324_soft_reset"] = None self.rustc_cfg["si5324_soft_reset"] = None
@ -197,6 +212,8 @@ class GenericMaster(SoCCore):
platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]") platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]")
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24") platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
self.submodules += SMAClkinForward(self.platform)
data_pads = [platform.request("sfp", i) for i in range(4)] data_pads = [platform.request("sfp", i) for i in range(4)]
self.submodules.drtio_transceiver = gtx_7series.GTX( self.submodules.drtio_transceiver = gtx_7series.GTX(