def test_3():
ana = Analysis(input=root)
ana.gen_sources()
ana.set_target(target_name='fpga')
ctrl = ana.launch(debug=True)
# reset sequence
# the RNG takes 25000 cycles to start up, but we wait
# 10x longer to be extra sure (i.e., 25ms)
ctrl.set_param('cdf_rst', 1)
ctrl.set_reset(1)
ctrl.set_reset(0)
time.sleep(25e-3)
ctrl.set_param('cdf_rst', 0)
# run for some time (each second yields 10M points)
time.sleep(100)
# read out results
ctrl.stall_emu()
ctrl.refresh_param('vio_0_i')
cdfs = []
cdf_tot = int(ctrl.get_param('cdf_tot'))
for i in range(MIN_CDF, MAX_CDF + 1):
cdfs.append(int(ctrl.get_param(f'cdf_{numstr(i)}')))
# print results
print(f'cdf_tot: {cdf_tot}')
for i in range(MIN_CDF, MAX_CDF + 1):
print(f'{i}: {cdfs[i-MIN_CDF]/cdf_tot}')
def main():
result_file = r'./results/dummy.vcd'
args = parse()
ana = Analysis(input=root) # create analysis object to host prototyping project
ana.set_target(target_name='fpga') # set the active target to 'fpga'
if args.gen_bitstream:
ana.gen_sources() # generate functional models
ana.build() # generate bitstream for project
ctrl_handle = ana.launch(debug=True) # start interactive control
ctrl_handle.set_reset(1) # reset simulation
ctrl_handle.setup_trace_unit(trigger_name='time',
trigger_operator='gt',
trigger_value=1e-9,
sample_decimation=0,
) # config & arm trace unit
#ctrl_handle.set_param('emu_ctrl_data', 10000000)
#ctrl_handle.set_param('emu_ctrl_mode', 3)
ctrl_handle.set_param('emu_ctrl_mode', 1)
ctrl_handle.set_reset(0) # start simulation
#sleep(0.1)
time = ctrl_handle.get_emu_time()
print(f'Paused at:{time}')
ctrl_handle.sleep_emu(1e-6)
#sleep(0.1)
time = ctrl_handle.get_emu_time()
print(f'Paused at:{time}')
ctrl_handle.sleep_emu(1e-6)
#sleep(0.1)
time = ctrl_handle.get_emu_time()
print(f'Paused at:{time}')
ctrl_handle.sleep_emu(1e-6)
#sleep(0.1)
time = ctrl_handle.get_emu_time()
print(f'Paused at:{time}')
ctrl_handle.sleep_emu(1e-6)
#sleep(0.1)
time = ctrl_handle.get_emu_time()
print(f'Paused at:{time}')
ctrl_handle.wait_on_and_dump_trace(result_file=result_file) # wait till trace buffer is full and dump to result file
ana.view(result_file=result_file) # view waveform
def main():
args = parse()
ana = Analysis(
input=root) # create analysis object to host prototyping project
ana.gen_sources() # generate functional models
ana.set_target(target_name='fpga') # set the active target to 'fpga'
if args.gen_bitstream:
ana.build() # generate bitstream for project
ctrl_handle = ana.launch(debug=True) # start interactive control
ctrl_handle.set_reset(1) # reset simulation
ctrl_handle.setup_trace_unit(trigger_name='time',
trigger_operator='gt',
trigger_value=5.5,
sample_decimation=800,
sample_count=16384) # config & arm trace unit
ctrl_handle.set_reset(0) # start simulation
ctrl_handle.wait_on_and_dump_trace(
) # wait till trace buffer is full and dump to result file
ana.view() # view waveform
def test_6(prbs_test_dur, jitter_rms, noise_rms, chan_tau, chan_delay):
# read ffe_length
SYSTEM = yaml.load(open(get_file('config/system.yml'), 'r'),
Loader=yaml.FullLoader)
ffe_length = SYSTEM['generic']['ffe']['parameters']['length']
jtag_inst_width = 5
sc_bus_width = 32
sc_addr_width = 14
tc_bus_width = 32
tc_addr_width = 14
sc_op_width = 2
tc_op_width = 2
sc_cfg_data = 8
sc_cfg_inst = 9
sc_cfg_addr = 10
tc_cfg_data = 12
tc_cfg_inst = 13
tc_cfg_addr = 14
read = 1
write = 2
reg_list = json.load(open(get_file('build/all/jtag/reg_list.json'), 'r'))
reg_dict = {elem['name']: elem['addresses'] for elem in reg_list}
arr_pat = re.compile(r'([a-zA-Z_0-9]+)+\[(\d+)\]')
def get_reg_addr(name):
m = arr_pat.match(name)
if m:
name = m.groups()[0]
index = int(m.groups()[1])
return reg_dict[name][index]
else:
return reg_dict[name]
# connect to the CPU
print('Connecting to the CPU...')
ana = Analysis(input=str(THIS_DIR))
ana.set_target(target_name='fpga')
ctrl = ana.launch()
ser = ctrl.ctrl_handler
# functions
def do_reset():
ser.write('RESET\n'.encode('utf-8'))
def do_init():
ser.write('INIT\n'.encode('utf-8'))
def set_emu_rst(val):
ser.write(f'SET_EMU_RST {val}\n'.encode('utf-8'))
def set_rstb(val):
ser.write(f'SET_RSTB {val}\n'.encode('utf-8'))
def set_jitter_rms(val):
ser.write(f'SET_JITTER_RMS {val}\n'.encode('utf-8'))
def set_noise_rms(val):
ser.write(f'SET_NOISE_RMS {val}\n'.encode('utf-8'))
def set_prbs_eqn(val):
ser.write(f'SET_PRBS_EQN {val}\n'.encode('utf-8'))
def set_sleep(val):
ser.write(f'SET_SLEEP {val}\n'.encode('utf-8'))
def shift_ir(val, width):
ser.write(f'SIR {val} {width}\n'.encode('utf-8'))
def shift_dr(val, width):
ser.write(f'SDR {val} {width}\n'.encode('utf-8'))
return int(ser.readline().strip())
def write_tc_reg(name, val):
# specify address
shift_ir(tc_cfg_addr, jtag_inst_width)
shift_dr(get_reg_addr(name), tc_addr_width)
# send data
shift_ir(tc_cfg_data, jtag_inst_width)
shift_dr(val, tc_bus_width)
# specify "WRITE" operation
shift_ir(tc_cfg_inst, jtag_inst_width)
shift_dr(write, tc_op_width)
def write_sc_reg(name, val):
# specify address
shift_ir(sc_cfg_addr, jtag_inst_width)
shift_dr(get_reg_addr(name), sc_addr_width)
# send data
shift_ir(sc_cfg_data, jtag_inst_width)
shift_dr(val, sc_bus_width)
# specify "WRITE" operation
shift_ir(sc_cfg_inst, jtag_inst_width)
shift_dr(write, sc_op_width)
def read_tc_reg(name):
# specify address
shift_ir(tc_cfg_addr, jtag_inst_width)
shift_dr(get_reg_addr(name), tc_addr_width)
# specify "READ" operation
shift_ir(tc_cfg_inst, jtag_inst_width)
shift_dr(read, tc_op_width)
# get data
shift_ir(tc_cfg_data, jtag_inst_width)
return shift_dr(0, tc_bus_width)
def read_sc_reg(name):
# specify address
shift_ir(sc_cfg_addr, jtag_inst_width)
shift_dr(get_reg_addr(name), sc_addr_width)
# specify "READ" operation
shift_ir(sc_cfg_inst, jtag_inst_width)
shift_dr(read, sc_op_width)
# get data
shift_ir(sc_cfg_data, jtag_inst_width)
return shift_dr(0, sc_bus_width)
def load_weight(
d_idx, # clog2(ffe_length)
w_idx, # 4 bits
value, # 10 bits
):
print(
f'Loading weight d_idx={d_idx}, w_idx={w_idx} with value {value}')
# determine number of bits for d_idx
d_idx_bits = int(ceil(log2(ffe_length)))
# write wme_ffe_inst
wme_ffe_inst = 0
wme_ffe_inst |= d_idx & ((1 << d_idx_bits) - 1)
wme_ffe_inst |= (w_idx & 0b1111) << d_idx_bits
write_tc_reg('wme_ffe_inst', wme_ffe_inst)
# write wme_ffe_data
wme_ffe_data = value & 0b1111111111
write_tc_reg('wme_ffe_data', wme_ffe_data)
# pulse wme_ffe_exec
write_tc_reg('wme_ffe_exec', 1)
write_tc_reg('wme_ffe_exec', 0)
def update_chan(coeff_tuples, offset=0):
# put together the command
args = ['UPDATE_CHAN', offset, len(coeff_tuples)]
for coeff_tuple in coeff_tuples:
args += coeff_tuple
cmd = ' '.join(str(elem) for elem in args)
ser.write((cmd + '\n').encode('utf-8'))
# stall until confirmation is received
assert ser.readline().decode('utf-8').strip() == 'OK', 'Serial error'
# Initialize
set_sleep(1)
do_init()
# Clear emulator reset. A bit of delay is added just in case
# the MT19937 generator is being used, because it takes awhile
# to start up (LCG and LFSR start almost immediately)
set_emu_rst(0)
time.sleep(10e-3)
# Reset JTAG
print('Reset JTAG')
do_reset()
# Release other reset signals
print('Release other reset signals')
set_rstb(1)
# Configure noise
set_jitter_rms(int(round(jitter_rms * 1e13)))
set_noise_rms(int(round(noise_rms * 1e4)))
# Configure step response function
placeholder = PlaceholderFunction(domain=CFG['func_domain'],
order=CFG['func_order'],
numel=CFG['func_numel'],
coeff_widths=CFG['func_widths'],
coeff_exps=CFG['func_exps'],
real_type=get_dragonphy_real_type())
chan_func = lambda t_vec: (1 - np.exp(-(t_vec - chan_delay) / chan_tau)
) * np.heaviside(t_vec - chan_delay, 0)
coeffs_bin = placeholder.get_coeffs_bin_fmt(chan_func)
coeff_tuples = list(zip(*coeffs_bin))
chunk_size = 32
for k in range(len(coeff_tuples) // chunk_size):
print(f'Updating channel at chunk {k}...')
update_chan(coeff_tuples[(k * chunk_size):((k + 1) * chunk_size)],
offset=k * chunk_size)
# Soft reset
print('Soft reset')
write_tc_reg('int_rstb', 1)
write_tc_reg('en_inbuf', 1)
write_tc_reg('en_gf', 1)
write_tc_reg('en_v2t', 1)
# read the ID
print('Reading ID...')
shift_ir(1, 5)
id_result = shift_dr(0, 32)
print(f'ID: {id_result}')
# Set PFD offset
print('Set PFD offset')
for k in range(16):
write_tc_reg(f'ext_pfd_offset[{k}]', 0)
# Set the equation for the PRBS checker
print('Setting the PRBS equation')
write_sc_reg('prbs_eqn',
0x100002) # matches equation used by prbs21 in DaVE
# Configure PRBS checker
print('Configure the PRBS checker')
write_sc_reg('sel_prbs_mux', 1) # "0" is ADC, "1" is FFE, "3" is BIST
# Release the PRBS checker from reset
print('Release the PRBS checker from reset')
write_sc_reg('prbs_rstb', 1)
# Set up the FFE
dt = 1.0 / (16.0e9)
coeff0 = 128.0 / (1.0 - exp(-dt / chan_tau))
coeff1 = -128.0 * exp(-dt / chan_tau) / (1.0 - exp(-dt / chan_tau))
for loop_var in range(16):
for loop_var2 in range(ffe_length):
if (loop_var2 == 0):
# The argument order for load() is depth, width, value
load_weight(loop_var2, loop_var, int(round(coeff0)))
elif (loop_var2 == 1):
load_weight(loop_var2, loop_var, int(round(coeff1)))
else:
load_weight(loop_var2, loop_var, 0)
write_tc_reg(f'ffe_shift[{loop_var}]', 7)
# Configure the CDR offsets
print('Configure the CDR offsets')
write_tc_reg('ext_pi_ctl_offset[0]', 0)
write_tc_reg('ext_pi_ctl_offset[1]', 128)
write_tc_reg('ext_pi_ctl_offset[2]', 256)
write_tc_reg('ext_pi_ctl_offset[3]', 384)
write_tc_reg('en_ext_max_sel_mux', 1)
# Configure the retimer
print('Configuring the retimer...')
write_tc_reg('retimer_mux_ctrl_1', 0b1111111111111111)
write_tc_reg('retimer_mux_ctrl_2', 0b1111111111111111)
# write_tc_reg('retimer_mux_ctrl_1', 0b0000111111110000)
# write_tc_reg('retimer_mux_ctrl_2', 0b1111000000000000)
# Configure the CDR
print('Configuring the CDR...')
write_tc_reg('cdr_rstb', 0)
write_tc_reg('Kp', 18)
write_tc_reg('Ki', 0)
write_tc_reg('invert', 1)
write_tc_reg('en_freq_est', 0)
write_tc_reg('en_ext_pi_ctl', 0)
write_tc_reg('sel_inp_mux', 1) # "0": use ADC output, "1": use FFE output
# Re-initialize ordering
print('Re-initialize ADC ordering')
write_tc_reg('en_v2t', 0)
write_tc_reg('en_v2t', 1)
# Release the CDR from reset, then wait for it to lock
# TODO: explore why it is not sufficient to pulse cdr_rstb low here
# (i.e., seems that it must be set to zero while configuring CDR parameters
print('Wait for the CDR to lock')
write_tc_reg('cdr_rstb', 1)
time.sleep(1.0)
# Run PRBS test. In order to get a conservative estimate for the throughput, the
# test duration includes the time it takes to send JTAG commands to start and stop
# the PRBS bit counter. This is needed because the counter will start running partway
# through the first JTAG command, and stop running partway through the second command.
# Since we don't know exactly when this happens, a conservative estimate should include
# the full time taken by the two JTAG commands. The effect of their inclusion can be
# minimized by running the test for a longer period.
print('Run PRBS test')
t_start = time.time()
write_sc_reg('prbs_checker_mode', 2)
time.sleep(prbs_test_dur)
write_sc_reg('prbs_checker_mode', 3)
t_stop = time.time()
# Print out duration of PRBS test
print(f'PRBS test took {t_stop-t_start} seconds.')
# Read out PRBS test results
print('Read out PRBS test results')
err_bits = 0
err_bits |= read_sc_reg('prbs_err_bits_upper')
err_bits <<= 32
err_bits |= read_sc_reg('prbs_err_bits_lower')
print(f'err_bits: {err_bits}')
total_bits = 0
total_bits |= read_sc_reg('prbs_total_bits_upper')
total_bits <<= 32
total_bits |= read_sc_reg('prbs_total_bits_lower')
print(f'total_bits: {total_bits}')
print(f'BER: {err_bits/total_bits:e}')
# check results
print('Checking the results...')
assert id_result == 497598771, 'ID mismatch'
assert err_bits == 0, 'Bit error detected'
assert total_bits > 100000, 'Not enough bits detected'
# finish test
print('OK!')
class JtagTester:
def __init__(self,
ser_port='/dev/ttyUSB0',
ffe_length=10,
bit_bang=False,
comm_style='uart',
jtag_sleep_us=1,
use_batch_mode=False,
print_mode='debug',
cdr_settling_time=0.1,
prbs_test_dur=0.1,
use_ffe=True):
# save settings
self.ser_port = ser_port
self.bit_bang = bit_bang
self.comm_style = comm_style
self.ffe_length = ffe_length
self.jtag_sleep_us = jtag_sleep_us
self.use_batch_mode = use_batch_mode
self.print_mode = print_mode
self.cdr_settling_time = cdr_settling_time
self.prbs_test_dur = prbs_test_dur
self.use_ffe = use_ffe
# initialize
self.jtag_inst_width = 5
self.sc_bus_width = 32
self.sc_addr_width = 14
self.tc_bus_width = 32
self.tc_addr_width = 14
self.sc_op_width = 2
self.tc_op_width = 2
self.sc_cfg_data = 8
self.sc_cfg_inst = 9
self.sc_cfg_addr = 10
self.tc_cfg_data = 12
self.tc_cfg_inst = 13
self.tc_cfg_addr = 14
self.read = 1
self.write = 2
# build register dictionary
reg_list = json.load(
open(get_file('build/all/jtag/reg_list.json'), 'r'))
self.reg_dict = {elem['name']: elem['addresses'] for elem in reg_list}
# list of transactions queued up
self.batch_started = False
self.uart_batch = []
self.uart_bytes_total = 0
self.reg_reads = 0
self.reg_writes = 0
# connect UART if desired
if self.comm_style == 'uart':
self.connect_serial()
elif self.comm_style == 'vio':
self.connect_vio()
def start_batch(self):
self.batch_started = True
self.uart_batch = []
def run_batch(self):
# write all commands as a block
all_cmds = [f'{cmd}\n' for cmd, _ in self.uart_batch]
all_cmds = ''.join(all_cmds).encode('utf-8')
self.ser.write(all_cmds)
# keep track of how many bits were sent
self.uart_bytes_total += len(all_cmds)
# extract all of the deferred values
for _, deferred_value in self.uart_batch:
if deferred_value is not None:
deferred_value.value = int(self.ser.readline().strip())
# clear the batch flag
self.batch_started = False
def get_reg_addr(self, name):
if '[' in name:
lbracket = name.index('[')
rbracket = name.index(']')
base_name = name[:lbracket]
index = int(name[(lbracket + 1):rbracket])
return self.reg_dict[base_name][index]
else:
return self.reg_dict[name]
def connect_serial(self):
# connect to the CPU
print('Connecting to the CPU...')
self.ser = serial.Serial(port=self.ser_port, baudrate=115200)
def connect_vio(self):
# Create analysis object
self.ana = Analysis(input=get_dir('tests/fpga_system_tests/emu_macro'))
# Select the "FPGA" target (as opposed to CPU simulation)
self.ana.set_target(target_name='fpga')
# Start the interactive control
self.ctrl = self.ana.launch(debug=False)
# run a serial command
def ser_cmd(self, cmd, expect_output=False):
if self.batch_started:
if expect_output:
deferred_value = DeferredValue()
self.uart_batch.append((cmd, deferred_value))
return deferred_value
else:
self.uart_batch.append((cmd, None))
else:
# send the command
cmd_bytes = f'{cmd}\n'.encode('utf-8')
self.ser.write(cmd_bytes)
# keep track of how many bytes have been sent
self.uart_bytes_total += len(cmd_bytes)
# read output if needed
if expect_output:
return int(self.ser.readline().strip())
# functions
def do_reset(self):
if self.bit_bang:
# initialize JTAG signals
self.set_tdi(0)
self.set_tck(0)
self.set_tms(1)
self.set_trst_n(0)
self.cycle_tck()
# de-assert reset
self.set_trst_n(1)
self.cycle_tck()
# go to the IDLE state
self.set_tms(1)
self.cycle_tck()
for _ in range(10):
self.cycle_tck()
self.set_tms(0)
self.cycle_tck()
else:
self.ser_cmd('RESET')
def do_init(self):
if self.comm_style == 'uart':
self.ser_cmd('INIT')
elif self.comm_style == 'vio':
# emulator control signal
self.set_emu_rst(1)
# JTAG-specific
self.set_tdi(0)
self.set_tck(0)
self.set_tms(1)
self.set_trst_n(0)
# Other signals
self.set_rstb(0)
def cycle_tck(self):
self.set_tck(1)
self.set_tck(0)
def set_emu_rst(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_EMU_RST {val}')
elif self.comm_style == 'vio':
self.ctrl.set_reset(val)
def set_rstb(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_RSTB {val}')
elif self.comm_style == 'vio':
self.ctrl.set_param(name='rstb', value=val)
def set_sleep(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_SLEEP {val}')
def set_tdi(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_TDI {val}')
elif self.comm_style == 'vio':
self.ctrl.set_param(name='tdi', value=val)
def set_tck(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_TCK {val}')
elif self.comm_style == 'vio':
self.ctrl.set_param(name='tck', value=val)
def set_tms(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_TMS {val}')
elif self.comm_style == 'vio':
self.ctrl.set_param(name='tms', value=val)
def set_trst_n(self, val):
if self.comm_style == 'uart':
self.ser_cmd(f'SET_TRST_N {val}')
elif self.comm_style == 'vio':
self.ctrl.set_param(name='trst_n', value=val)
def get_tdo(self):
if self.comm_style == 'uart':
return self.ser_cmd(f'GET_TDO', expect_output=True)
elif self.comm_style == 'vio':
self.ctrl.refresh_param('vio_0_i')
return int(self.ctrl.get_param('tdo'))
else:
return 0 # dummy value
def shift_ir(self, val, width):
if self.bit_bang:
# Move to Select-DR-Scan state
self.set_tms(1)
self.cycle_tck()
# Move to Select-IR-Scan state
self.set_tms(1)
self.cycle_tck()
# Move to Capture IR state
self.set_tms(0)
self.cycle_tck()
# Move to Shift-IR state
self.set_tms(0)
self.cycle_tck()
# Remain in Shift-IR state and shift in inst_in.
# Observe the TDO signal to read the x_inst_out
for i in range(width - 1):
self.set_tdi((val >> i) & 1)
self.cycle_tck()
# Shift in the last bit and switch to Exit1-IR state
self.set_tdi((val >> (width - 1)) & 1)
self.set_tms(1)
self.cycle_tck()
# Move to Update-IR state
self.set_tms(1)
self.cycle_tck()
# Move to Run-Test/Idle state
self.set_tms(0)
self.cycle_tck()
self.cycle_tck()
else:
self.ser_cmd(f'SIR {val} {width}')
def shift_dr(self, val, width, expect_output=False):
if self.bit_bang:
# Move to Select-DR-Scan state
self.set_tms(1)
self.cycle_tck()
# Move to Capture-DR state
self.set_tms(0)
self.cycle_tck()
# Move to Shift-DR state
self.set_tms(0)
self.cycle_tck()
# Remain in Shift-DR state and shift in data_in.
# Observe the TDO signal to read the data_out
if expect_output:
retval = 0
else:
retval = None
for i in range(width - 1):
self.set_tdi((val >> i) & 1)
if expect_output:
retval |= (self.get_tdo() << i)
self.cycle_tck()
# Shift in the last bit and switch to Exit1-DR state
self.set_tdi((val >> (width - 1)) & 1)
if expect_output:
retval |= (self.get_tdo() << (width - 1))
self.set_tms(1)
self.cycle_tck()
# Move to Update-DR state
self.set_tms(1)
self.cycle_tck()
# Move to Run-Test/Idle state
self.set_tms(0)
self.cycle_tck()
self.cycle_tck()
# Return result
return retval
else:
if expect_output:
return self.ser_cmd(f'SDR {val} {width}', expect_output=True)
else:
self.ser_cmd(f'QSDR {val} {width}')
def write_tc_reg(self, name, val):
# update stats
self.reg_writes += 1
# print action
self.print(f'Writing TC register {name} with value {val}...')
# specify address
self.shift_ir(self.tc_cfg_addr, self.jtag_inst_width)
self.shift_dr(self.get_reg_addr(name), self.tc_addr_width)
# send data
self.shift_ir(self.tc_cfg_data, self.jtag_inst_width)
self.shift_dr(val, self.tc_bus_width)
# specify "WRITE" operation
self.shift_ir(self.tc_cfg_inst, self.jtag_inst_width)
self.shift_dr(self.write, self.tc_op_width)
def write_sc_reg(self, name, val):
# update stats
self.reg_writes += 1
# print action
self.print(f'Writing SC register {name} with value {val}...')
# specify address
self.shift_ir(self.sc_cfg_addr, self.jtag_inst_width)
self.shift_dr(self.get_reg_addr(name), self.sc_addr_width)
# send data
self.shift_ir(self.sc_cfg_data, self.jtag_inst_width)
self.shift_dr(val, self.sc_bus_width)
# specify "WRITE" operation
self.shift_ir(self.sc_cfg_inst, self.jtag_inst_width)
self.shift_dr(self.write, self.sc_op_width)
def read_tc_reg(self, name):
# update stats
self.reg_reads += 1
# print action
self.print(f'Reading TC register {name}...')
# specify address
self.shift_ir(self.tc_cfg_addr, self.jtag_inst_width)
self.shift_dr(self.get_reg_addr(name), self.tc_addr_width)
# specify "READ" operation
self.shift_ir(self.tc_cfg_inst, self.jtag_inst_width)
self.shift_dr(self.read, self.tc_op_width)
# get data
self.shift_ir(self.tc_cfg_data, self.jtag_inst_width)
return self.shift_dr(0, self.tc_bus_width, expect_output=True)
def read_sc_reg(self, name):
# update stats
self.reg_reads += 1
# print action
self.print(f'Reading SC register {name}...')
# specify address
self.shift_ir(self.sc_cfg_addr, self.jtag_inst_width)
self.shift_dr(self.get_reg_addr(name), self.sc_addr_width)
# specify "READ" operation
self.shift_ir(self.sc_cfg_inst, self.jtag_inst_width)
self.shift_dr(self.read, self.sc_op_width)
# get data
self.shift_ir(self.sc_cfg_data, self.jtag_inst_width)
return self.shift_dr(0, self.sc_bus_width, expect_output=True)
def load_weight(
self,
d_idx, # clog2(ffe_length)
w_idx, # 4 bits
value, # 10 bits
):
self.print(
f'Loading weight d_idx={d_idx}, w_idx={w_idx} with value {value}')
# determine number of bits for d_idx
d_idx_bits = int(ceil(log2(self.ffe_length)))
# write wme_ffe_inst
wme_ffe_inst = 0
wme_ffe_inst |= d_idx & ((1 << d_idx_bits) - 1)
wme_ffe_inst |= (w_idx & 0b1111) << d_idx_bits
self.write_tc_reg('wme_ffe_inst', wme_ffe_inst)
# write wme_ffe_data
wme_ffe_data = value & 0b1111111111
self.write_tc_reg('wme_ffe_data', wme_ffe_data)
# pulse wme_ffe_exec
self.write_tc_reg('wme_ffe_exec', 1)
self.write_tc_reg('wme_ffe_exec', 0)
def print(self, *args, **kwargs):
if self.print_mode == 'debug':
print(*args, **kwargs)
def run_test(self):
# record starting time
start_time = time.time()
# Start a batch if running in batch mode
if self.use_batch_mode:
self.start_batch()
# Initialize
if (self.comm_style == 'uart') and not self.bit_bang:
self.set_sleep(self.jtag_sleep_us)
self.do_init()
# Clear emulator reset
self.set_emu_rst(0)
# Reset JTAG
self.print('Reset JTAG')
self.do_reset()
# Release other reset signals
self.print('Release other reset signals')
self.set_rstb(1)
# Soft reset
self.print('Soft reset')
self.write_tc_reg('int_rstb', 1)
self.write_tc_reg('en_inbuf', 1)
self.write_tc_reg('en_gf', 1)
self.write_tc_reg('en_v2t', 1)
# read the ID
self.print('Reading ID...')
self.shift_ir(1, 5)
id_result = self.shift_dr(0, 32, expect_output=True)
# Set PFD offset
self.print('Set PFD offset')
for k in range(16):
self.write_tc_reg(f'ext_pfd_offset[{k}]', 0)
# Configure PRBS checker
self.print('Configure the PRBS checker')
if self.use_ffe:
# use FFE data
self.write_tc_reg('sel_prbs_mux', 1)
else:
# use ADC data instead
self.write_tc_reg('sel_prbs_mux', 0)
# Release the PRBS checker from reset
self.print('Release the PRBS checker from reset')
self.write_tc_reg('prbs_rstb', 1)
# Set up the FFE
if self.use_ffe:
dt = 1.0 / (16.0e9)
tau = 25.0e-12
coeff0 = 128.0 / (1.0 - exp(-dt / tau))
coeff1 = -128.0 * exp(-dt / tau) / (1.0 - exp(-dt / tau))
for loop_var in range(16):
for loop_var2 in range(self.ffe_length):
if (loop_var2 == 0):
# The argument order for load() is depth, width, value
self.load_weight(loop_var2, loop_var,
int(round(coeff0)))
elif (loop_var2 == 1):
self.load_weight(loop_var2, loop_var,
int(round(coeff1)))
else:
self.load_weight(loop_var2, loop_var, 0)
self.write_tc_reg(f'ffe_shift[{loop_var}]', 7)
# Configure the CDR offsets
self.print('Configure the CDR offsets')
ext_pi_ctl_offset = [0, 128, 256, 384]
for k in range(4):
self.write_tc_reg(f'ext_pi_ctl_offset[{k}]', ext_pi_ctl_offset[k])
self.write_tc_reg('en_ext_max_sel_mux', 1)
# Configure the retimer
self.print('Configuring the retimer...')
self.write_tc_reg('retimer_mux_ctrl_1', 0xffff)
self.write_tc_reg('retimer_mux_ctrl_2', 0xffff)
# Configure the CDR
self.print('Configuring the CDR...')
self.write_tc_reg('cdr_rstb', 0)
self.write_tc_reg('Kp', 18)
self.write_tc_reg('Ki', 0)
self.write_tc_reg('invert', 1)
self.write_tc_reg('en_freq_est', 0)
self.write_tc_reg('en_ext_pi_ctl', 0)
if self.use_ffe:
# use FFE data
self.write_tc_reg('sel_inp_mux', 1)
else:
# use ADC data instead
self.write_tc_reg('sel_inp_mux', 0)
# Re-initialize ordering
self.print('Re-initialize ADC ordering')
self.write_tc_reg('en_v2t', 0)
self.write_tc_reg('en_v2t', 1)
# Release the CDR from reset, then wait for it to lock
# TODO: explore why it is not sufficient to pulse cdr_rstb low here
# (i.e., seems that it must be set to zero while configuring CDR parameters
self.print('Wait for the CDR to lock')
self.write_tc_reg('cdr_rstb', 1)
if self.use_batch_mode:
self.run_batch()
time.sleep(self.cdr_settling_time)
if self.use_batch_mode:
self.start_batch()
# Run PRBS test
self.print('Run PRBS test')
self.write_tc_reg('prbs_checker_mode', 2)
if self.use_batch_mode:
self.run_batch()
time.sleep(self.prbs_test_dur)
if self.use_batch_mode:
self.start_batch()
self.write_tc_reg('prbs_checker_mode', 3)
# Read out PRBS test results
self.print('Read out PRBS test results')
self.print('Reading err_bits...')
err_bits = 0
err_bits = err_bits | self.read_sc_reg('prbs_err_bits_upper')
err_bits = err_bits << 32
err_bits = err_bits | self.read_sc_reg('prbs_err_bits_lower')
self.print('Reading total_bits...')
total_bits = 0
total_bits = total_bits | self.read_sc_reg('prbs_total_bits_upper')
total_bits = total_bits << 32
total_bits = total_bits | self.read_sc_reg('prbs_total_bits_lower')
# Run batch if needed, converting DeferredValue objects to integers afterwards
if self.use_batch_mode:
self.run_batch()
id_result = id_result.value
err_bits = err_bits.value
total_bits = total_bits.value
# Measure stop time
stop_time = time.time()
print(f'Test took {stop_time - start_time} seconds.')
print(f'Register writes: {self.reg_writes}')
print(f'Register reads: {self.reg_reads}')
if self.comm_style == 'uart':
print(f'Total bytes transmitted (UART): {self.uart_bytes_total}')
# Print results
print(f'id_result: {id_result}')
print(f'err_bits: {err_bits}')
print(f'total_bits: {total_bits}')
# Check results
print('Checking the results...')
assert id_result == 497598771, 'ID mismatch'
assert err_bits == 0, 'Bit error detected'
assert total_bits > 100000, 'Not enough bits detected'
# Finish test
print('OK!')
reg_dict = {elem['name']: elem['addresses'] for elem in reg_list}
arr_pat = re.compile(r'([a-zA-Z_0-9]+)+\[(\d+)\]')
def get_reg_addr(name):
m = arr_pat.match(name)
if m:
name = m.groups()[0]
index = int(m.groups()[1])
return reg_dict[name][index]
else:
return reg_dict[name]
# connect to the CPU
print('Connecting to the CPU...')
ana = Analysis(input=str(get_file(f'tests/fpga_system_tests/{mode}')))
ana.set_target(target_name='fpga')
ctrl = ana.launch()
ser = ctrl.ctrl_handler
# functions
def do_reset():
ser.write('RESET\n'.encode('utf-8'))
def do_init():
ser.write('INIT\n'.encode('utf-8'))
def set_emu_rst(val):
ser.write(f'SET_EMU_RST {val}\n'.encode('utf-8'))
def set_rstb(val):
ser.write(f'SET_RSTB {val}\n'.encode('utf-8'))