soc/cores/cpu/zynqmp/core.py: added method to enable ZynqMP i2c interface in EMIO mode

This commit is contained in:
Gwenhael Goavec-Merou 2024-05-17 11:02:31 +02:00
parent e95edaf9be
commit 49488e5e01
1 changed files with 42 additions and 0 deletions

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@ -50,6 +50,7 @@ class ZynqMP(CPU):
self.memory_buses = [] # Memory buses (Connected directly to LiteDRAM). self.memory_buses = [] # Memory buses (Connected directly to LiteDRAM).
self.axi_gp_masters = [None] * 3 # General Purpose AXI Masters. self.axi_gp_masters = [None] * 3 # General Purpose AXI Masters.
self.gem_mac = [] # GEM MAC reserved ports. self.gem_mac = [] # GEM MAC reserved ports.
self.i2c_use = [] # I2c reserved ports.
self.cd_ps = ClockDomain() self.cd_ps = ClockDomain()
@ -254,6 +255,47 @@ class ZynqMP(CPU):
self.specials += Instance(f"gem{n}", **mac_params) self.specials += Instance(f"gem{n}", **mac_params)
self.gem_mac.append(n) self.gem_mac.append(n)
def add_i2c(self, n, pads):
assert n < 2 and not n in self.i2c_use
assert pads is not None
# PSU configuration.
self.config[f"PSU__I2C{n}__PERIPHERAL__ENABLE"] = 1
self.config[f"PSU__I2C{n}__PERIPHERAL__IO"] = "EMIO"
# Signals.
scl_i = Signal()
scl_o = Signal()
scl_t = Signal()
sda_i = Signal()
sda_o = Signal()
sda_t = Signal()
# PSU connections.
self.specials += [
Instance("IOBUF",
i_I = sda_o,
o_O = sda_i,
i_T = sda_t,
io_IO = pads.sda
),
Instance("IOBUF",
i_I = scl_o,
o_O = scl_i,
i_T = scl_t,
io_IO = pads.scl
),
]
self.cpu_params.update({
f"i_emio_i2c{n}_scl_i" : scl_i,
f"o_emio_i2c{n}_scl_o" : scl_o,
f"o_emio_i2c{n}_scl_t" : scl_t,
f"i_emio_i2c{n}_sda_i" : sda_i,
f"o_emio_i2c{n}_sda_o" : sda_o,
f"o_emio_i2c{n}_sda_t" : sda_t,
})
def do_finalize(self): def do_finalize(self):
if len(self.ps_tcl): if len(self.ps_tcl):
self.ps_tcl.append("set_property -dict [list \\") self.ps_tcl.append("set_property -dict [list \\")