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→Software Details
==Driver and Software Installation==
== Python Example ==
=== Connecting and Programming ===
You can connect to the board using the following command:<syntaxhighlight lang="python">
from chipwhisperer.capture.targets.CW305 import CW305
cw = CW305()
cw.con(bsfile=r"C:\chipwhisperer\hardware\victims\cw305_artixtarget\fpga\vivado_examples\aes128_verilog\aes128_verilog.runs\impl_35t\cw305_top.bit", force=False)
</syntaxhighlight>The optional "bsfile" argument causes it to download a bitstream. If the "force" flag is set to "False", the system will only download the bitstream to an UNPROGRAMMED FPGA.
If doing development, you probably want to set the force flag to "True". This will ensure you always get a newly programmed FPGA with the latest bitstream.
=== Running AES-128 Example ===
You can run the AES-128 example code (the cw305_top.bit file) with the following example:<syntaxhighlight lang="python">
from chipwhisperer.capture.targets.CW305 import CW305
cw = CW305()
cw.con(bsfile=r"C:\chipwhisperer\hardware\victims\cw305_artixtarget\fpga\vivado_examples\aes128_verilog\aes128_verilog.runs\impl_35t\cw305_top.bit", force=False)
test_key = [0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c]
test_inp = [0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a]
exp_result = [0x3A, 0xD7, 0x7B, 0xB4, 0x0D, 0x7A, 0x36, 0x60, 0xA8, 0x9E, 0xCA, 0xF3, 0x24, 0x66, 0xEF, 0x97]
cw.loadEncryptionKey(test_key)
cw.loadInput(test_inp)
cw.go()
result = cw.readOutput()
print "ACT: "+" ".join(["%02X"%c for c in result])
print "EXP: "+" ".join(["%02X"%c for c in exp_result])
</syntaxhighlight>This will download the bitstream, run an encryption, and print the results. You could for example run 500 encryptions, storing the results to a MATLAB array with the following code:
<TODO>
Accessing FPGA Registers
See the FPGA Projects section for importat details of the FPGA design framework.
Setting PLL Frequency
Setting VCC-INT<syntaxhighlight lang="python">
#Set vcc-int to 0.95V
cw.vccint_set(0.95)
</syntaxhighlight>
==Programmatic Usage==
The provided modules are written in Python, but any language which is supported by libusb can talk to the hardware. This will require you to write your own lower-layer driver and is officially unsupported by NewAE.
If using from other software (such as MATLAB), it is suggested to call use the existing Python interface, which can be done via a simple command-line interface (described below) or otherwise use the existing Python interfacetoo. The Python interface is guaranteed to maintain compatibility with future changes in the SAM3U firmware.
==Simple command-line interface==