M-Labs/artiq-zynq
10
1
Fork 19
Code Issues 12 Pull Requests 1 Releases Wiki Activity

kasli-soc & zc706: Fix GTX Clock Path during Initialization #280

Merged
sb10q merged 4 commits from linuswck/artiq-zynq:gtx_clock_path_fix into master 2023-11-07 18:55:09 +08:00
Conversation 2 Commits 4 Files Changed 3 +12 -3
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files
Showing only changes of commit d507b6f60f - Show all commits

15
src/gateware/zynq_clocking.py
View File

@ -65,7 +65,7 @@ class ClockSwitchFSM(Module):
class SYSCRG(Module, AutoCSR): class SYSCRG(Module, AutoCSR):
def __init__(self, platform, ps7, main_clk, clk_sw=None, freq=125e6): def __init__(self, platform, ps7, main_clk, clk_sw=None, freq=125e6, ext_async_rst=None):
# assumes bootstrap clock is same freq as main and sys output # assumes bootstrap clock is same freq as main and sys output
self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
@ -125,10 +125,19 @@ class SYSCRG(Module, AutoCSR):
Instance("BUFG", i_I=mmcm_sys, o_O=self.cd_sys.clk), Instance("BUFG", i_I=mmcm_sys, o_O=self.cd_sys.clk),
Instance("BUFG", i_I=mmcm_sys4x, o_O=self.cd_sys4x.clk), Instance("BUFG", i_I=mmcm_sys4x, o_O=self.cd_sys4x.clk),
Instance("BUFG", i_I=mmcm_clk208, o_O=self.cd_clk200.clk), Instance("BUFG", i_I=mmcm_clk208, o_O=self.cd_clk200.clk),
AsyncResetSynchronizer(self.cd_sys, ~self.mmcm_locked),
AsyncResetSynchronizer(self.cd_clk200, ~self.mmcm_locked),
] ]
if ext_async_rst is not None:
self.specials += [
AsyncResetSynchronizer(self.cd_sys, ~self.mmcm_locked | ext_async_rst),
AsyncResetSynchronizer(self.cd_clk200, ~self.mmcm_locked | ext_async_rst),
]
else:
self.specials += [
AsyncResetSynchronizer(self.cd_sys, ~self.mmcm_locked),
AsyncResetSynchronizer(self.cd_clk200, ~self.mmcm_locked),
]
reset_counter = Signal(4, reset=15) reset_counter = Signal(4, reset=15)
ic_reset = Signal(reset=1) ic_reset = Signal(reset=1)
self.sync.clk200 += \ self.sync.clk200 += \