I have the exact same setup and similar problem like this guy - https://newae.discoursehosting.net/t/trigger-error-in-lab-2-1/3340
Short summary
I am getting the “gain too low” error when using cw.capture_trace. But despite that it seems I can finish the UART triggers after clearing the error every time it appears? Really confused why the error appears.
My setup
- Notebook:
02 - Husky Triggers.ipynb(I only addedscope.errorsorscope.errors.clear()to retry some steps, sometimes that worked, see below) - Setup: CW Husky + CW308 UFO board + STM32F303 target (identical to his)
- CW version: latest master
534fe4881bb54723eb43df465cc54b406d9ccc4ffrom Mar 20 2023 (later than 5.7.0) on Linux
Errors encountered in 02 Husky Triggering demo for UART
So the first hiccup in the demo is under “1. UART Triggering”
First running cell starting with scope.trigger.module = 'UART' throws a warning about imprecise frequency and “SWO imprecise CDC error”, running the cell second time works:
First run:
Second run of same cell, no error:
The capture_trace error
Now when we get to cell with race = cw.capture_trace(scope, target, bytearray(16), bytearray(16)), I am always getting “gain too low” error, even when repeating with clearing errors first:
Full output of print(scope) after that:
cwhusky Device
sn = 50203120374a38503230343138303037
fpga_buildtime = 3/2/2023, 21:35
fw_version =
major = 1
minor = 5
debug = 0
gain =
mode = low
gain = 59
db = 12.064220183486238
adc =
state = False
basic_mode = rising_edge
timeout = 2
offset = 0
presamples = 0
samples = 5000
decimate = 1
trig_count = 4
stream_mode = False
test_mode = False
bits_per_sample = 12
segments = 1
segment_cycles = 0
segment_cycle_counter_en = False
clip_errors_disabled = False
lo_gain_errors_disabled = False
errors = gain too low error,
clock =
clkgen_src = system
clkgen_freq = 7370129.87012987
adc_mul = 4
adc_freq = 29480519.48051948
freq_ctr = 338607
freq_ctr_src = extclk
clkgen_locked = True
adc_phase = 0
extclk_monitor_enabled = False
extclk_error = False
extclk_tolerance = 102.996826171875
trigger =
module = UART
triggers = tio2
io =
tio1 = serial_rx
tio2 = serial_tx
tio3 = high_z
tio4 = high_z
pdid = high_z
pdic = high_z
nrst = high_z
glitch_hp = False
glitch_lp = False
extclk_src = hs1
hs2 = clkgen
target_pwr = True
tio_states = (1, 1, 1, 0)
cdc_settings = bytearray(b'\x00\x00\x00\x00')
aux_io_mcx = high_z
glitch_trig_mcx = trigger
glitch =
enabled = False
mmcm_locked = False
num_glitches = 1
clk_src = target
width = 0
offset = 0
trigger_src = manual
arm_timing = after_scope
ext_offset = 0
repeat = 1
output = clock_xor
phase_shift_steps = 4592
ADS4128 =
mode = normal
low_speed = True
hi_perf = 2
LA =
present = True
enabled = False
clkgen_enabled = True
locked = True
clk_source = pll
trigger_source = glitch
oversampling_factor = 2
sampling_clock_frequency = 14740516.662597656
downsample = 1
capture_group = glitch
capture_depth = 0
trace =
present = True
enabled = True
errors = False
trace_synced = True
trace_mode = parallel
trace_width = 4
clock =
fe_clock_alive = True
fe_clock_src = target_clock
clkgen_enabled = True
fe_freq = 7370258.331298828
swo_clock_locked = True
swo_clock_freq = 14740516.662597656
capture =
trigger_source = trace trigger, rule #0
use_husky_arm = True
raw = True
rules_enabled = [0, 1]
rules = [{'rule': 0, 'patt': bytearray(b'\x00\x00\x00\x00\x00p00'), 'mask': bytearray(b'\x00\x00\x00\x00\x00\xff\xff\xff')}, {'rule': 1, 'patt': bytearray(b'\x00\x00\x00r7DF7'), 'mask': bytearray(b'\x00\x00\x00\xff\xff\xff\xff\xff')}]
mode = off
count = 0
max_triggers = 1
triggers_generated = 1
record_syncs = True
matched_pattern_data = 3030303030703030
matched_pattern_counts = [11, 0, 0, 0, 0, 0, 0, 0]
XADC =
status = good
current temperature [C] = 54.5
maximum temperature [C] = 56.7
user temperature alarm trigger [C] = 80.0
user temperature reset trigger [C] = 59.9
device temperature alarm trigger [C] = 89.9
device temperature reset trigger [C] = 59.9
vccint = 1.002
vccaux = 1.797
vccbram = 1.002
userio =
mode = trace
direction = 3
drive_data = 0
status = 508
LEDs =
setting = 0 (default, as labelled)
errors =
sam_errors = False
sam_led_setting = Default
XADC errors = False
ADC errors = gain too low error,
extclk error = False
trace errors = False
It seems I can finish the UART part of the demo and it looks like it works, but the “gain too low error” is confusing. Clearing the errors via scope.errors.clear() each time they appear seems to work, but really don’t understand what is going on here, what the error actually means.