[ecdsa-sca] Enable ECDSA-256 secret shares for capture

- Enables sending of all secret shares (k0, k1, d0, d1) from the Python
code (capture.py).

- Enables the trace collection without needing to reflash the firmware
  at every iteration.

Signed-off-by: Bilgiday Yuce <bilgiday@opentitan.org>

.gitattributes

@@ -2,10 +2,14 @@ cw/objs/lowrisc_systems_chip_englishbreakfast_cw305_0.1.bit filter=lfs diff=lfs
 cw/objs/aes_serial_fpga_nexysvideo.bin filter=lfs diff=lfs merge=lfs -text
 cw/objs/lowrisc_systems_chip_earlgrey_cw310_0.1.bit filter=lfs diff=lfs merge=lfs -text
 cw/objs/lowrisc_systems_chip_earlgrey_cw310_0.1_kmac_dom.bit filter=lfs diff=lfs merge=lfs -text
+cw/objs/lowrisc_systems_chip_earlgrey_cw310_0.1_ecdsa.bit filter=lfs diff=lfs merge=lfs -text
 cw/objs/kmac_serial_fpga_cw310.bin filter=lfs diff=lfs merge=lfs -text
 cw/objs/sha3_serial_fpga_cw310.bin filter=lfs diff=lfs merge=lfs -text
 cw/objs/aes_serial_fpga_cw310.bin filter=lfs diff=lfs merge=lfs -text
+cw/objs/ecc_serial_fpga_cw310.bin filter=lfs diff=lfs merge=lfs -text
+cw/objs/ecc384_serial_fpga_cw310.bin filter=lfs diff=lfs merge=lfs -text
 doc/img/cw310_cwhusky.jpg filter=lfs diff=lfs merge=lfs -text
 doc/img/sample_traces_aes.png filter=lfs diff=lfs merge=lfs -text
 doc/img/sample_traces_kmac.png filter=lfs diff=lfs merge=lfs -text
 test/data/tvla_general/* filter=lfs diff=lfs merge=lfs -text
+doc/img/ot-sca-cw310-clocking.png filter=lfs diff=lfs merge=lfs -text

cw/capture_ecdsa_cw310.yaml

@@ -1,8 +1,13 @@
 device:
   fpga_bitstream: objs/lowrisc_systems_chip_earlgrey_cw310_0.1_ecdsa.bit
   fw_bin: objs/ecc_serial_fpga_cw310.bin
-  # Target operating frequency
-  pll_frequency: 22000000
+  # Target operating frequency: 
+  # for ecdsa-simple: 25-50MHz (alignment issues above 66MHz)
+  # for ecdsa-stream: 15-20MHz (sampling_rate-adc_resolution tradeoff)
+  # More details on Husky stream mode can be found in the following links:
+  # https://github.com/lowRISC/ot-sca/issues/106#issuecomment-1359530023
+  # https://rtfm.newae.com/Capture/ChipWhisperer-Husky/#streaming-mode
+  pll_frequency: 15000000
   baudrate: 115200
 capture:
   # Only ECDSA-256 (32) and ECDSA-384 (48) are supported at this moment.
@@ -13,7 +18,8 @@ capture:
   num_samples: 262140
   # Offset in samples
   offset: 0
-  # scope gain in db - 13 for non-stream mode, 32.5 for stream mode
+  # scope gain in db - This may change for each setup,
+  # find a value for your setup
   scope_gain: 32.5
   num_traces: 1
   project_name: projects/opentitan_ecdsa_256