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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 21 |
1 files changed, 19 insertions, 2 deletions
@@ -67,13 +67,30 @@ statically at the beginning of main(): MODE_DELTAS and MODE_ENTROPY. MODE_ENTROPY is the default, and means the microcontroller will send entropy as binary data as fast as it can get it, which is about 24 kB/s in the current version of hardware and software. To get some entropy -and perform rudimentary analysis of it, and assuming the device was -enumerated as ttyUSB0, do +and perform rudimentary analysis of it, and assuming USB is used and +the device was enumerated as ttyUSB0, do ldattach -8 -n -1 -s 460800 tty /dev/ttyUSB0 + echo > /dev/ttyUSB0 cat /dev/ttyUSB0 | rngtest -c 10 cat /dev/ttyUSB0 | head -c 100000 | ent +For Raspberry-Pi, follow any of the guides on the internet for how to +enable the serial port on the GPIO pin header and then try + + ldattach -s 115200 -8 -n -1 tty /dev/ttyAMA0 + echo > /dev/ttyAMA0 + cat /dev/ttyAMA0 | rngtest -c 10 + cat /dev/ttyAMA0 | head -c 100000 | ent + +(the baud rate used with the R-Pi could probably be increased with a +little hardware debugging effort). + +Which UART on the board that will receive the entropy is controlled +by the sending of a newline to the UART ('echo > /dev/ttyUSB0' and +'echo > /dev/ttyAMA0' in the examples above). The power on default is +the USB UART. + MODE_DELTAS is a quality assurance mode, and outputs the raw Timer IC values captured for analysis. The stand alone program in src/delta16/ |