3 pinmux documented here https://libre-soc.org/docs/pinmux/
5 from nmigen
.build
.dsl
import Resource
, Subsignal
, Pins
6 from nmigen
.build
.plat
import TemplatedPlatform
7 from nmigen
.build
.res
import ResourceManager
, ResourceError
8 from nmigen
.hdl
.rec
import Layout
9 from nmigen
import Elaboratable
, Signal
, Module
, Instance
10 from collections
import OrderedDict
11 from jtag
import JTAG
, resiotypes
12 from copy
import deepcopy
13 from nmigen
.cli
import rtlil
16 # extra dependencies for jtag testing (?)
17 #from soc.bus.sram import SRAM
19 #from nmigen import Memory
20 from nmigen
.sim
import Simulator
, Delay
, Settle
, Tick
, Passive
22 from nmutil
.util
import wrap
24 #from soc.debug.jtagutils import (jtag_read_write_reg,
25 # jtag_srv, jtag_set_reset,
26 # jtag_set_ir, jtag_set_get_dr)
28 from c4m
.nmigen
.jtag
.tap
import TAP
, IOType
29 from c4m
.nmigen
.jtag
.bus
import Interface
as JTAGInterface
30 #from soc.debug.dmi import DMIInterface, DBGCore
31 #from soc.debug.test.dmi_sim import dmi_sim
32 #from soc.debug.test.jtagremote import JTAGServer, JTAGClient
33 from nmigen
.build
.res
import ResourceError
35 # Was thinking of using these functions, but skipped for simplicity for now
36 # XXX nope. the output from JSON file.
37 #from pinfunctions import (i2s, lpc, emmc, sdmmc, mspi, mquadspi, spi,
38 # quadspi, i2c, mi2c, jtag, uart, uartfull, rgbttl, ulpi, rgmii, flexbus1,
39 # flexbus2, sdram1, sdram2, sdram3, vss, vdd, sys, eint, pwm, gpio)
41 # File for stage 1 pinmux tested proposed by Luke,
42 # https://bugs.libre-soc.org/show_bug.cgi?id=50#c10
46 # sigh this needs to come from pinmux.
49 gpios
.append("%d*" % i
)
50 return {'uart': ['tx+', 'rx-'],
52 #'jtag': ['tms-', 'tdi-', 'tdo+', 'tck+'],
53 'i2c': ['sda*', 'scl+']}
56 a function is needed which turns the results of dummy_pinset()
59 [UARTResource("uart", 0, tx=..., rx=..),
60 I2CResource("i2c", 0, scl=..., sda=...),
61 Resource("gpio", 0, Subsignal("i"...), Subsignal("o"...)
62 Resource("gpio", 1, Subsignal("i"...), Subsignal("o"...)
68 def create_resources(pinset
):
70 for periph
, pins
in pinset
.items():
73 #print("I2C required!")
74 resources
.append(I2CResource('i2c', 0, sda
='sda', scl
='scl'))
75 elif periph
== 'uart':
76 #print("UART required!")
77 resources
.append(UARTResource('uart', 0, tx
='tx', rx
='rx'))
78 elif periph
== 'gpio':
79 #print("GPIO required!")
80 print ("GPIO is defined as '*' type, meaning i, o and oe needed")
83 pname
= "gpio"+pin
[:-1] # strip "*" on end
84 # urrrr... tristsate and io assume a single pin which is
85 # of course exactly what we don't want in an ASIC: we want
86 # *all three* pins but the damn port is not outputted
87 # as a triplet, it's a single Record named "io". sigh.
88 # therefore the only way to get a triplet of i/o/oe
89 # is to *actually* create explicit triple pins
90 # XXX ARRRGH, doesn't work
91 #pad = Subsignal("io",
92 # Pins("%s_i %s_o %s_oe" % (pname, pname, pname),
93 # dir="io", assert_width=3))
94 #ios.append(Resource(pname, 0, pad))
96 pads
.append(Subsignal("i",
97 Pins(pname
+"_i", dir="i", assert_width
=1)))
98 pads
.append(Subsignal("o",
99 Pins(pname
+"_o", dir="o", assert_width
=1)))
100 pads
.append(Subsignal("oe",
101 Pins(pname
+"_oe", dir="o", assert_width
=1)))
102 ios
.append(Resource
.family(pname
, 0, default_name
=pname
,
104 resources
.append(Resource
.family(periph
, 0, default_name
="gpio",
107 # add clock and reset
108 clk
= Resource("clk", 0, Pins("sys_clk", dir="i"))
109 rst
= Resource("rst", 0, Pins("sys_rst", dir="i"))
110 resources
.append(clk
)
111 resources
.append(rst
)
115 def JTAGResource(*args
):
117 io
.append(Subsignal("tms", Pins("tms", dir="i", assert_width
=1)))
118 io
.append(Subsignal("tdi", Pins("tdi", dir="i", assert_width
=1)))
119 io
.append(Subsignal("tck", Pins("tck", dir="i", assert_width
=1)))
120 io
.append(Subsignal("tdo", Pins("tdo", dir="o", assert_width
=1)))
121 return Resource
.family(*args
, default_name
="jtag", ios
=io
)
123 def UARTResource(*args
, rx
, tx
):
125 io
.append(Subsignal("rx", Pins(rx
, dir="i", assert_width
=1)))
126 io
.append(Subsignal("tx", Pins(tx
, dir="o", assert_width
=1)))
127 return Resource
.family(*args
, default_name
="uart", ios
=io
)
130 def I2CResource(*args
, scl
, sda
):
133 pads
.append(Subsignal("i", Pins(sda
+"_i", dir="i", assert_width
=1)))
134 pads
.append(Subsignal("o", Pins(sda
+"_o", dir="o", assert_width
=1)))
135 pads
.append(Subsignal("oe", Pins(sda
+"_oe", dir="o", assert_width
=1)))
136 ios
.append(Resource
.family(sda
, 0, default_name
=sda
, ios
=pads
))
138 pads
.append(Subsignal("i", Pins(scl
+"_i", dir="i", assert_width
=1)))
139 pads
.append(Subsignal("o", Pins(scl
+"_o", dir="o", assert_width
=1)))
140 pads
.append(Subsignal("oe", Pins(scl
+"_oe", dir="o", assert_width
=1)))
141 ios
.append(Resource
.family(scl
, 0, default_name
=scl
, ios
=pads
))
142 return Resource
.family(*args
, default_name
="i2c", ios
=ios
)
145 # top-level demo module.
146 class Blinker(Elaboratable
):
147 def __init__(self
, pinset
, resources
):
148 self
.jtag
= JTAG({}, "sync", resources
=resources
)
149 #memory = Memory(width=32, depth=16)
150 #self.sram = SRAM(memory=memory, bus=self.jtag.wb)
152 def elaborate(self
, platform
):
153 jtag_resources
= self
.jtag
.pad_mgr
.resources
155 m
.submodules
.jtag
= self
.jtag
156 #m.submodules.sram = self.sram
159 m
.d
.sync
+= count
.eq(count
+1)
160 print ("resources", platform
, jtag_resources
.items())
161 gpio
= self
.jtag
.request('gpio')
162 print (gpio
, gpio
.layout
, gpio
.fields
)
163 # get the GPIO bank, mess about with some of the pins
164 m
.d
.comb
+= gpio
.gpio0
.o
.eq(1)
165 m
.d
.comb
+= gpio
.gpio1
.o
.eq(gpio
.gpio2
.i
)
166 m
.d
.comb
+= gpio
.gpio1
.oe
.eq(count
[4])
167 m
.d
.sync
+= count
[0].eq(gpio
.gpio1
.i
)
168 # get the UART resource, mess with the output tx
169 uart
= self
.jtag
.request('uart')
170 print (uart
, uart
.fields
)
171 intermediary
= Signal()
172 m
.d
.comb
+= uart
.tx
.eq(intermediary
)
173 m
.d
.comb
+= intermediary
.eq(uart
.rx
)
175 # to even be able to get at objects, you first have to make them
176 # available - i.e. not as local variables
179 return self
.jtag
.boundary_elaborate(m
, platform
)
185 yield from self
.jtag
.iter_ports()
188 _trellis_command_templates = [
190 {{invoke_tool("yosys")}}
192 {{get_override("yosys_opts")|options}}
199 # sigh, have to create a dummy platform for now.
200 # TODO: investigate how the heck to get it to output ilang. or verilog.
201 # or, anything, really. but at least it doesn't barf
202 class ASICPlatform(TemplatedPlatform
):
204 resources
= OrderedDict()
206 command_templates
= ['/bin/true'] # no command needed: stops barfing
208 **TemplatedPlatform
.build_script_templates
,
213 "{{name}}.debug.v": r
"""
214 /* {{autogenerated}} */
215 {{emit_debug_verilog()}}
219 default_clk
= "clk" # should be picked up / overridden by platform sys.clk
220 default_rst
= "rst" # should be picked up / overridden by platform sys.rst
222 def __init__(self
, resources
, jtag
):
226 # create set of pin resources based on the pinset, this is for the core
227 #jtag_resources = self.jtag.pad_mgr.resources
228 self
.add_resources(resources
)
230 # add JTAG without scan
231 self
.add_resources([JTAGResource('jtag', 0)], no_boundary_scan
=True)
233 def add_resources(self
, resources
, no_boundary_scan
=False):
234 print ("ASICPlatform add_resources", resources
)
235 return super().add_resources(resources
)
237 #def iter_ports(self):
238 # yield from super().iter_ports()
239 # for io in self.jtag.ios.values():
240 # print ("iter ports", io.layout, io)
241 # for field in io.core.fields:
242 # yield getattr(io.core, field)
243 # for field in io.pad.fields:
244 # yield getattr(io.pad, field)
246 # XXX these aren't strictly necessary right now but the next
247 # phase is to add JTAG Boundary Scan so it maaay be worth adding?
248 # at least for the print statements
249 def get_input(self
, pin
, port
, attrs
, invert
):
250 self
._check
_feature
("single-ended input", pin
, attrs
,
251 valid_xdrs
=(0,), valid_attrs
=None)
254 print (" get_input", pin
, "port", port
, port
.layout
)
255 m
.d
.comb
+= pin
.i
.eq(self
._invert
_if
(invert
, port
))
258 def get_output(self
, pin
, port
, attrs
, invert
):
259 self
._check
_feature
("single-ended output", pin
, attrs
,
260 valid_xdrs
=(0,), valid_attrs
=None)
263 print (" get_output", pin
, "port", port
, port
.layout
)
264 m
.d
.comb
+= port
.eq(self
._invert
_if
(invert
, pin
.o
))
267 def get_tristate(self
, pin
, port
, attrs
, invert
):
268 self
._check
_feature
("single-ended tristate", pin
, attrs
,
269 valid_xdrs
=(0,), valid_attrs
=None)
271 print (" get_tristate", pin
, "port", port
, port
.layout
)
273 print (" pad", pin
, port
, attrs
)
274 print (" pin", pin
.layout
)
276 # m.submodules += Instance("$tribuf",
279 # i_A=self._invert_if(invert, pin.o),
282 m
.d
.comb
+= io
.core
.o
.eq(pin
.o
)
283 m
.d
.comb
+= io
.core
.oe
.eq(pin
.oe
)
284 m
.d
.comb
+= pin
.i
.eq(io
.core
.i
)
285 m
.d
.comb
+= io
.pad
.i
.eq(port
.i
)
286 m
.d
.comb
+= port
.o
.eq(io
.pad
.o
)
287 m
.d
.comb
+= port
.oe
.eq(io
.pad
.oe
)
290 def get_input_output(self
, pin
, port
, attrs
, invert
):
291 self
._check
_feature
("single-ended input/output", pin
, attrs
,
292 valid_xdrs
=(0,), valid_attrs
=None)
294 print (" get_input_output", pin
, "port", port
, port
.layout
)
296 print (" port layout", port
.layout
)
298 print (" layout", pin
.layout
)
299 #m.submodules += Instance("$tribuf",
302 # i_A=self._invert_if(invert, io.pad.o),
305 # Create aliases for the port sub-signals
310 m
.d
.comb
+= pin
.i
.eq(self
._invert
_if
(invert
, port_i
))
311 m
.d
.comb
+= port_o
.eq(self
._invert
_if
(invert
, pin
.o
))
312 m
.d
.comb
+= port_oe
.eq(pin
.oe
)
316 def toolchain_prepare(self
, fragment
, name
, **kwargs
):
317 """override toolchain_prepare in order to grab the fragment
319 self
.fragment
= fragment
320 return super().toolchain_prepare(fragment
, name
, **kwargs
)
323 and to create a Platform instance with that list, and build
327 p.resources=listofstuff
330 pinset
= dummy_pinset()
332 resources
= create_resources(pinset
)
333 top
= Blinker(pinset
, resources
)
335 vl
= rtlil
.convert(top
, ports
=top
.ports())
336 with
open("test_jtag_blinker.il", "w") as f
:
340 # XXX these modules are all being added *AFTER* the build process links
341 # everything together. the expectation that this would work is...
342 # unrealistic. ordering, clearly, is important.
344 # dut = JTAG(test_pinset(), wb_data_wid=64, domain="sync")
345 top
.jtag
.stop
= False
346 # rather than the client access the JTAG bus directly
347 # create an alternative that the client sets
350 cdut
.cbus
= JTAGInterface()
352 # set up client-server on port 44843-something
353 top
.jtag
.s
= JTAGServer()
354 cdut
.c
= JTAGClient()
355 top
.jtag
.s
.get_connection()
357 # print ("running server only as requested, use openocd remote to test")
359 # top.jtag.s.get_connection(None) # block waiting for connection
361 # take copy of ir_width and scan_len
362 cdut
._ir
_width
= top
.jtag
._ir
_width
363 cdut
.scan_len
= top
.jtag
.scan_len
365 p
= ASICPlatform (resources
, top
.jtag
)
367 # this is what needs to gets treated as "top", after "main module" top
368 # is augmented with IO pads with JTAG tacked on. the expectation that
369 # the get_input() etc functions will be called magically by some other
370 # function is unrealistic.
371 top_fragment
= p
.fragment
373 # XXX simulating top (the module that does not itself contain IO pads
374 # because that's covered by build) cannot possibly be expected to work
375 # particularly when modules have been added *after* the platform build()
376 # function has been called.
379 print("Starting sanity test case!")
380 print("printing out list of stuff in top")
382 # ok top now has a variable named "gpio", let's enumerate that too
383 print("printing out list of stuff in top.gpio and its type")
384 print(top
.gpio
.__class
__.__name
__, dir(top
.gpio
))
385 # ok, it's a nmigen Record, therefore it has a layout. let's print
387 print("top.gpio is a Record therefore has fields and a layout")
388 print(" layout:", top
.gpio
.layout
)
389 print(" fields:", top
.gpio
.fields
)
390 # etc etc. you get the general idea
391 yield top
.gpio_0__gpio0__o__o
.eq(0)
392 yield top
.gpio_0__gpio0__o__core__o
.eq(0)
393 yield top
.gpio_0__gpio1__o
.eq(0)
396 # Code borrowed from cesar, runs, but shouldn't actually work because of
397 # self. statements and non-existent signal names.
399 print("Example test case")
402 # Settle() is needed to give a quick response to
403 # the zero delay case
405 # wait for rel_o to become active
406 while not (yield self
.rel_o
):
409 # read the transaction parameters
410 assert self
.expecting
, "an unexpected result was produced"
411 delay
= (yield self
.delay
)
412 expected
= (yield self
.expected
)
413 # wait for `delay` cycles
414 for _
in range(delay
):
416 # activate go_i for one cycle
417 yield self
.go_i
.eq(1)
418 yield self
.count
.eq(self
.count
+ 1)
420 # check received data against the expected value
421 result
= (yield self
.port
)
422 assert result
== expected
,\
423 f
"expected {expected}, received {result}"
424 yield self
.go_i
.eq(0)
425 yield self
.port
.eq(0)
428 sim
.add_clock(1e-6, domain
="sync") # standard clock
430 #sim.add_sync_process(wrap(jtag_srv(top))) #? jtag server
431 #if len(sys.argv) != 2 or sys.argv[1] != 'server':
432 #sim.add_sync_process(wrap(jtag_sim(cdut, top.jtag))) # actual jtag tester
433 #sim.add_sync_process(wrap(dmi_sim(top.jtag))) # handles (pretends to be) DMI
435 sim
.add_sync_process(wrap(test_case1()))
436 sim
.add_sync_process(wrap(test_case0()))
438 with sim
.write_vcd("blinker_test.vcd"):