Sca Lab 2_1B Power Trace Gathering issue

1

Hi, I’m working on Lab 2.1B, the Exploration section. The amplitude of the power traces I’m capturing is extremely small. My setup consists of an STM32F051 target board on a CW308 UFO connected to a ChipWhisperer-Lite. I’ve attached my complete initialization code for both the ChipWhisperer-Lite and the target, and an image ofthe physical connection of everything.

image
image1351×997 170 KB

Here is my device information from the output of scope

cwlite Device
sn         = 50203220343043543230323238303035
fw_version = 
    major = 0
    minor = 65
    debug = 0
gain = 
    mode = high
    gain = 30
    db   = 24.8359375
adc = 
    state          = True
    basic_mode     = rising_edge
    timeout        = 2
    offset         = 0
    presamples     = 0
    samples        = 3000
    decimate       = 1
    trig_count     = 1771909994
    fifo_fill_mode = normal
clock = 
    adc_src       = clkgen_x4
    adc_phase     = 0
    adc_freq      = 29538459
    adc_rate      = 29538459.0
    adc_locked    = True
    freq_ctr      = 0
    freq_ctr_src  = extclk
    clkgen_src    = system
    extclk_freq   = 10000000
    clkgen_mul    = 2
    clkgen_div    = 26
    clkgen_freq   = 7384615.384615385
    clkgen_locked = True
trigger = 
    triggers = tio4
    module   = basic
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, 0, 1)
    cdc_settings = [0, 0, 0, 0]
glitch = 
    clk_src     = target
    mmcm_locked = True
    width       = 10.15625
    width_fine  = 0
    offset      = 10.15625
    offset_fine = 0
    trigger_src = manual
    arm_timing  = after_scope
    ext_offset  = 0
    repeat      = 1
    output      = clock_xor
2

The Image of the connection

cw
cw1920×2560 471 KB

3

You haven’t connected the SMA cable. It goes between the port labeled “MEASURE” on the CW-lite and the connector near the top-right corner of the CW308.

Your power trace appears “square” because without the cable connected, all you are getting are 1-2 bits of noise.

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