def test_spi_models(args=None):
args = tb_default_args(args)
clock = Clock(0, frequency=125e6)
glbl = Global(clock)
ibus = Barebone(glbl)
spibus = SPIBus()
def bench():
tbdut = spi_controller_model(clock, ibus, spibus)
tbspi = SPISlave().process(spibus)
tbclk = clock.gen()
@instance
def tbstim():
yield clock.posedge
yield ibus.writetrans(0x00, 0xBE)
yield delay(100)
yield ibus.readtrans(0x00)
raise StopSimulation
return tbdut, tbspi, tbclk, tbstim
run_testbench(bench, args=args)
def test_adc128s022():
clock = Clock(0, frequency=50e6)
reset = Reset(0, active=0, async=False)
glbl = Global(clock, reset)
fifobus = FIFOBus(width=16)
spibus = SPIBus()
channel = Signal(intbv(0, min=0, max=8))
step = 3.3 / 7
analog_channels = [Signal(3.3 - step * ii) for ii in range(0, 8)]
print(analog_channels)
assert len(analog_channels) == 8
def check_empty(clock, fifo):
for ii in range(4000):
if not fifo.empty:
break
yield clock.posedge
@myhdl.block
def bench_adc128s022():
tbdut = adc128s022(glbl, fifobus, spibus, channel)
tbmdl = adc128s022_model(spibus,
analog_channels,
vref_pos=3.3,
vref_neg=0.)
tbclk = clock.gen()
@instance
def tbstim():
sample = intbv(0)[16:]
yield reset.pulse(33)
yield clock.posedge
# check the conversion value for each channel, should get
# smaller and smaller
for ch in range(0, 8):
channel.next = (ch + 1) % 8 # next channel
yield check_empty(clock, fifobus)
# should have a new sample
if not fifobus.empty:
fifobus.read.next = True
sample[:] = fifobus.read_data
yield clock.posedge
fifobus.read.next = False
yield clock.posedge
print("sample {:1X}:{:4d}, fifobus {} \n".format(
int(sample[16:12]), int(sample[12:0]), str(fifobus)))
assert fifobus.empty
else:
print("No sample!")
yield delay(100)
raise StopSimulation
return tbdut, tbmdl, tbclk, tbstim
run_testbench(bench_adc128s022)
def test_spi_slave(args=None):
args = tb_default_args(args)
clock = Clock(0, frequency=50e6)
reset = Reset(0, active=1, async=False)
glbl = Global(clock, reset)
spibus, fifobus = SPIBus(), FIFOBus()
# monitor the FIFOBus signals
data = Signal(intbv(0)[8:])
rd, wr, full, empty = Signals(bool(0), 4)
@myhdl.block
def bench_spi_slave():
tbdut = spi_slave_fifo(glbl, spibus, fifobus)
tbclk = clock.gen()
@instance
def tbstim():
yield reset.pulse(40)
yield delay(1000)
yield clock.posedge
# @todo: make generic
# @todo: random_sequence = [randint(0, fifobus.write_data.max) for _ in range(ntx)]
yield spibus.writeread(0x55)
yield spibus.writeread(0xAA)
yield spibus.writeread(0xCE)
assert spibus.get_read_data() == 0x55
yield spibus.writeread(0x01)
assert spibus.get_read_data() == 0xAA
yield spibus.writeread(0x01)
assert spibus.get_read_data() == 0xCE
raise StopSimulation
@always_comb
def tb_fifo_loopback():
if not fifobus.full:
fifobus.write.next = not fifobus.empty
fifobus.read.next = not fifobus.empty
fifobus.write_data.next = fifobus.read_data
# monitors
@always_comb
def tbmon():
data.next = fifobus.read_data
rd.next = fifobus.read
wr.next = fifobus.write
full.next = fifobus.full
empty.next = fifobus.empty
return tbdut, tbclk, tbstim, tb_fifo_loopback, tbmon
run_testbench(bench_spi_slave, args=args)
def spi_slave_led(clock, sck, mosi, miso, cs, leds ,out):
glbl = Global(clock)
spibus = SPIBus(sck=sck, mosi=mosi, miso=miso, ss=cs)
fifobus = FIFOBus()
div = divisor (clock, clk_div, 10)
fifobus.write_clock=clock
fifobus.read_clock=clock
rtl = recv_to_led(clock, fifobus, leds,out)
tbdut = spi_slave_fifo(glbl, spibus, fifobus)
@always_comb
def map():
spibus.csn.next = cs
return myhdl.instances()
def spi_controller_top(clock, reset, sck, mosi, miso, ss):
"""SPI top-level for conversion testing"""
glbl = Global(clock, reset)
spibus = SPIBus(sck, mosi, miso, ss)
fifobus = FIFOBus()
cso = spi_controller.cso()
cso.isstatic = True
cfg_inst = cso.instances()
spi_controller.debug = False
spi_inst = spi_controller(glbl, spibus, fifobus, cso=cso)
@always_comb
def fifo_loopback():
fifobus.write_data.next = fifobus.read_data
fifobus.write.next = fifobus.read_valid
fifobus.read.next = not fifobus.empty
return myhdl.instances()
def spi_slave_pulsegen(clock, sck, mosi, miso, cs, leds, out):
clk_div = Signal(False)
clk_pulse = Signal(False)
glbl = Global(clock)
spibus = SPIBus(sck=sck, mosi=mosi, miso=miso, ss=cs)
fifobus = FIFOBus()
fifobus.write_clock = clock
fifobus.read_clock = clock
div = divisor(clock, clk_div, 1)
divp = divisor(clock, clk_pulse, 1)
rtl = recv_to_plsgen(clk_div, clk_pulse, fifobus, leds, out)
#rtl = recv_to_led(clk_div, fifobus, leds)
tbdut = spi_slave_fifo_async(glbl, spibus, fifobus)
@always_comb
def map():
spibus.csn.next = cs
return myhdl.instances()
def test_spi_controller_cso(args=None):
args = tb_default_args(args)
clock = Clock(0, frequency=50e6)
reset = Reset(0, active=1, isasync=False)
glbl = Global(clock, reset)
spibus = SPIBus()
# a FIFOBus to push-pull data from the SPI controller
fifobus = FIFOBus(width=8)
# control-status object for the SPI controller
cso = spi_controller.cso()
spiee = SPIEEPROM()
asserr = Signal(bool(0))
@myhdl.block
def bench_spi_cso():
spi_controller.debug = True # enable debug monitors
tbdut = spi_controller(glbl, spibus, fifobus, cso=cso)
tbeep = spiee.process(clock, reset, spibus)
tbclk = clock.gen(hticks=5)
@instance
def tbstim():
yield reset.pulse(33)
yield delay(100)
yield clock.posedge
try:
# enable the SPI core
cso.enable.next = True
cso.bypass_fifo.next = True
cso.loopback.next = True
# write to the transmit FIFO
values = (0x02, 0x00, 0x00, 0x00, 0x55)
for data in values:
cso.tx_byte.next = data
cso.tx_write.next = True
yield clock.posedge
cso.tx_write.next = False
while cso.tx_fifo_count > 0:
yield delay(100)
while cso.rx_fifo_count < 5:
yield delay(100)
ii, nticks = 0, 0
while ii < len(values):
if cso.rx_empty:
cso.rx_read.next = False
else:
cso.rx_read.next = True
if cso.rx_byte_valid:
assert values[ii] == cso.rx_byte, \
"{:<4d}: data mismatch, {:02X} != {:02X}".format(
ii, int(values[ii]), int(cso.rx_byte))
ii += 1
nticks = 0
yield clock.posedge, cso.rx_empty.posedge
cso.rx_read.next = False
if nticks > 30:
raise TimeoutError
nticks += 1
cso.rx_read.next = False
yield clock.posedge
except AssertionError as err:
asserr.next = True
print("@E: assertion {}".format(err))
yield delay(100)
traceback.print_exc()
raise err
raise StopSimulation
# monitor signals for debugging
tx_write, rx_read = Signals(bool(0), 2)
@always_comb
def tbmon():
rx_read.next = cso.rx_read
tx_write.next = cso.tx_write
return tbdut, tbeep, tbclk, tbstim, tbmon
run_testbench(bench_spi_cso, args=args)
def test_spi_memory_mapped(args=None):
args = tb_default_args(args)
base_address = ba = 0x400
clock = Clock(0, frequency=50e6)
reset = Reset(0, active=1, isasync=False)
glbl = Global(clock, reset)
regbus = Wishbone(glbl)
fifobus = FIFOBus(size=16)
spiee = SPIEEPROM()
spibus = SPIBus()
asserr = Signal(bool(0))
@myhdl.block
def bench_spi():
tbdut = spi_controller(glbl, spibus, fifobus=fifobus, mmbus=regbus)
tbeep = spiee.gen(clock, reset, spibus)
tbclk = clock.gen(hticks=5)
# grab all the register file outputs
tbmap = regbus.interconnect()
# get a reference to the SPI register file
rf = regbus.regfiles['SPI_000']
# dumpy the registers for the SPI peripheral
print("SPI register file")
for name, reg in rf.registers.items():
print(" {0} {1:04X} {2:04X}".format(name, reg.addr, int(reg)))
print("")
@instance
def tbstim():
yield reset.pulse(33)
yield delay(100)
yield clock.posedge
try:
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# loop through the registers and check the default
# values, these are the offset values.
for addr, sig in rf.roregs:
yield regbus.readtrans(addr + ba)
assert regbus.get_read_data() == int(sig), \
"Invalid read-only value"
for addr, sig in rf.rwregs:
# need to skip the FIFO read / write
if addr in (
rf.sptx.addr,
rf.sprx.addr,
):
pass
else:
yield regbus.readtrans(addr + ba)
assert regbus.get_read_data() == int(sig), \
"Invalid default value"
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# enable the system
print("enable the SPI core")
yield regbus.writetrans(rf.spst.addr,
0x02) # register data drives fifo
yield regbus.writetrans(rf.spcr.addr,
0x9A) # default plus enable (98 + 02)
print("write to the transmit register")
for data in (0x02, 0x00, 0x00, 0x00, 0x55):
print("\nwriting to sptx {:02x}".format(data))
yield regbus.writetrans(rf.sptx.addr, data)
print("")
yield regbus.readtrans(rf.sptc.addr)
print("TX FIFO count {}".format(regbus.get_read_data()))
yield regbus.readtrans(rf.sprc.addr)
print("RX FIFO count {}".format(regbus.get_read_data()))
yield delay(1000)
print("wait for return bytes")
for ii in range(1000):
yield regbus.readtrans(rf.sprc.addr)
if regbus.get_read_data() == 5:
break
yield delay(10)
# verify bytes received and not timeout
print("RX FIFO count {}".format(regbus.get_read_data()))
assert regbus.get_read_data() == 5
print("read the returned bytes")
for ii in range(5):
yield regbus.readtrans(rf.sprx.addr)
print("spi readback {0}".format(regbus.get_read_data()))
except Exception as err:
print("@W: exception {0}".format(err))
yield delay(100)
traceback.print_exc()
raise err
yield delay(100)
raise StopSimulation
return tbstim, tbdut, tbeep, tbclk, tbmap
run_testbench(bench_spi, args=args)
from rhea.cores.spi import SPIBus
from rhea.models.spi import SPIEEPROM
from rhea.system import Global, Clock, Reset, Signals
from rhea.system import Wishbone
from rhea.system import FIFOBus
from rhea.utils.test import run_testbench, tb_convert, tb_args, tb_default_args
# global signals used by many
clock = Clock(0, frequency=100e6)
reset = Reset(0, active=1, isasync=True)
glbl = Global(clock, reset)
portmap = dict(glbl=glbl,
spibus=SPIBus(),
fifobus=FIFOBus(),
cso=spi_controller.cso())
@myhdl.block
def spi_controller_top(clock, reset, sck, mosi, miso, ss):
"""SPI top-level for conversion testing"""
glbl = Global(clock, reset)
spibus = SPIBus(sck, mosi, miso, ss)
fifobus = FIFOBus()
cso = spi_controller.cso()
cso.isstatic = True
cfg_inst = cso.instances()
def de0nano_converters(
clock,
reset,
led,
# ADC signals
adc_cs_n,
adc_saddr,
adc_sdat,
adc_sclk,
# Accelerometer and I2C signals
i2c_sclk,
i2c_sdat,
g_sensor_cs_n,
g_sensor_int,
# LT24 LCD display signals
lcd_on,
lcd_resetn,
lcd_csn,
lcd_rs,
lcd_wrn,
lcd_rdn,
lcd_data):
"""
The port names are the same as those in the board definition
(names in the user manual) for automatic mapping by the
rhea.build automation.
"""
# signals and interfaces
glbl = Global(clock, reset)
adcbus = SPIBus()
adcbus.mosi, adcbus.miso, adcbus.csn, adcbus.sck = (adc_saddr, adc_sdat,
adc_cs_n, adc_sclk)
fifobus = FIFOBus(width=16, size=16)
channel = Signal(intbv(0, min=0, max=8))
# ----------------------------------------------------------------
# global ticks
gtick = glbl_timer_ticks(glbl, include_seconds=True, user_timer=16)
# ----------------------------------------------------------------
# instantiate the ADC controller (retieves samples)
gconv = adc128s022(glbl, fifobus, adcbus, channel)
# read the samples out of the FIFO interface
fiford = Signal(bool(0))
@always(clock.posedge)
def rtl_read():
fiford = not fifobus.empty
@always_comb
def rtl_read_gate():
fifobus.rd.next = fiford and not fifobus.empty
# for now assign the samples to the LEDs for viewing
heartbeat = Signal(bool(0))
@always_seq(clock.posedge, reset=reset)
def rtl_leds():
if glbl.tick_sec:
heartbeat.next = not heartbeat
led.next = concat(fifobus.rdata[12:5], heartbeat)
# ----------------------------------------------------------------
# LCD dislay
lcd = LT24Interface()
resolution, color_depth = lcd.resolution, lcd.color_depth
lcd.assign(lcd_on, lcd_resetn, lcd_csn, lcd_rs, lcd_wrn, lcd_rdn, lcd_data)
# color bars and the interface between video source-n-sink
vmem = VideoMemory(resolution=resolution, color_depth=color_depth)
gbar = color_bars(glbl,
vmem,
resolution=resolution,
color_depth=color_depth)
# LCD video driver
glcd = lt24lcd(glbl, vmem, lcd)
gens = gtick, gconv, rtl_read, rtl_leds, gbar, glcd
return gens
def de0nano_converters(clock, reset, led,
# ADC signals
adc_cs_n, adc_saddr, adc_sdat, adc_sclk,
# Accelerometer and I2C signals
i2c_sclk, i2c_sdat, g_sensor_cs_n, g_sensor_int,
# LT24 LCD display signals
lcd_on, lcd_resetn, lcd_csn, lcd_rs,
lcd_wrn, lcd_rdn, lcd_data
):
"""
The port names are the same as those in the board definition
(names in the user manual) for automatic mapping by the
rhea.build automation.
"""
# signals and interfaces
glbl = Global(clock, reset)
adcbus = SPIBus()
adcbus.mosi, adcbus.miso, adcbus.csn, adcbus.sck = (
adc_saddr, adc_sdat, adc_cs_n, adc_sclk)
fifobus = FIFOBus(width=16, size=16)
channel = Signal(intbv(0, min=0, max=8))
# ----------------------------------------------------------------
# global ticks
gtick = glbl_timer_ticks(glbl, include_seconds=True,
user_timer=16)
# ----------------------------------------------------------------
# instantiate the ADC controller (retieves samples)
gconv = adc128s022(glbl, fifobus, adcbus, channel)
# read the samples out of the FIFO interface
fiford = Signal(bool(0))
@always(clock.posedge)
def rtl_read():
fiford = not fifobus.empty
@always_comb
def rtl_read_gate():
fifobus.rd.next = fiford and not fifobus.empty
# for now assign the samples to the LEDs for viewing
heartbeat = Signal(bool(0))
@always_seq(clock.posedge, reset=reset)
def rtl_leds():
if glbl.tick_sec:
heartbeat.next = not heartbeat
led.next = concat(fifobus.rdata[12:5], heartbeat)
# ----------------------------------------------------------------
# LCD dislay
lcd = LT24Interface()
resolution, color_depth = lcd.resolution, lcd.color_depth
lcd.assign(lcd_on, lcd_resetn, lcd_csn, lcd_rs, lcd_wrn,
lcd_rdn, lcd_data)
# color bars and the interface between video source-n-sink
vmem = VideoMemory(resolution=resolution, color_depth=color_depth)
gbar = color_bars(glbl, vmem, resolution=resolution,
color_depth=color_depth)
# LCD video driver
glcd = lt24lcd(glbl, vmem, lcd)
gens = gtick, gconv, rtl_read, rtl_leds, gbar, glcd
return gens