adding some details to flash

Author: SciLor

content/docs/tools/teddyCloud/setup/dump-certs/cc3235.md

@@ -6,8 +6,18 @@ description: ""
 # CC3235
 You'll have to manually extract it from the flash of the box with a SOP8 clamp directly from the memory or by desoldering it. Reading in-circuit can be tricky, but is possible. I recommend flashrom as tool for that. It may be necessary to use a more recent version of it.
 
+## Reading the flash with Pico
 As a probe you may use a raspberry pi pico with the [serprog protocol firmware](https://github.com/stacksmashing/pico-serprog) for it.
+```
+flashrom -p serprog:dev=/dev/ttyACM0:921600 -r cc32xx-flash.bin --progress
+```
+You may do multiple reads and compare the result
+```
+flashrom -p serprog:dev=/dev/ttyACM0:921600 -r cc32xx-flash.2.bin --progress
+diff cc32xx-flash.bin cc32xx-flash.2.bin #no output = equal
+```
 
+## Extract certificates
 You can use the [cc3200tool](https://github.com/toniebox-reverse-engineering/cc3200tool) to extract your certificates from the flash dump afterwards.
 ```
 cc3200tool -if cc32xx-flash.bin -d cc32xx read_all_files extract/