CWNano scope.adc.clk_src external fail

Embedded Security ChipWhisperer Software
1

Hello, I have a question about the cw-nano’s ADC Clock source.

It worked properly in the previous environment, but after replacing and updating the PC and chipwhisperer software, the code does not run.

Upon checking, it was found that changing the ‘ext’ option to ‘int’ allows it to run correctly.

How can I set this option to ‘ext’?

ChipWhisperer Nano Device
fw_version = 
    major = 0
    minor = 65
    debug = 0
io = 
    tio1         = None
    tio2         = None
    tio3         = None
    tio4         = high_z
    pdid         = True
    pdic         = False
    nrst         = True
    clkout       = 7500000.0
    cdc_settings = bytearray(b'\x01\x00\x00\x00')
adc = 
    clk_src  = ext
    clk_freq = 15000000.0
    samples  = 5000
glitch = 
    repeat     = 0
    ext_offset = 0
errors = 
    sam_errors      = None
    sam_led_setting = None

image
image776×279 5.94 KB

2

scope.adc.clk_src = ‘ext’ means that the clock must be provided externally, on the HS1 pin (see the Nano documentation).

In general, you would do this only if you’ve broken off the target end and are using some other target which generates its own clock.

For normal CW-Nano usage, scope.adc.clk_src = ‘int’ is what you want.