mjb/altos/src/drivers/ao_trng_send.c, branch fake-flight

chaoskey: Wait for input data to stabilize before using it

2017-09-12T20:40:06+00:00

The ADC data takes a while to start working after power on; wait for the range of input values to look reasonable before using the data. Signed-off-by: Keith Packard

altos/arm: Align data so that gcc 5.4 doesn't do byte-accesses. Add -Wcast-align

2016-12-18T05:04:33+00:00

Gcc 5.4.1 tracks alignment of data through assignments, so that a uint32_t pointer which comes from byte-aligned uint8_t data: extern uint8_t foo[]; uint32_t *q = (void *) foo; Fetches and stores through this pointer are done bytewise. This is slow (meh), but if q references a device register, things to bad very quickly. This patch works around this bug in the compiler by adding __attribute__((aligned(4))) tags to some variables, or changing them from uint8_t to uint32_t. Places doing this will now be caught as I've added -Wcast-align to the compiler flags. That required adding (void *) casts, after the relevant code was checked to make sure the compiler could tell that the addresses were aligned. Signed-off-by: Keith Packard

altos: Use standard FIPS testing for chaoskey

2016-08-02T23:55:11+00:00

Check to make sure we aren't repeating a block coming from the unwhitened source, which is the standard online FIPS test for RNGs. Signed-off-by: Keith Packard

Switch from GPLv2 to GPLv2+

2016-07-12T22:41:41+00:00

Signed-off-by: Keith Packard

altosuilib: Fill preload map on site or lat/lon change

2016-05-28T03:30:18+00:00

This loads the map view with the selected area when the site entry is changed or the user hits return in the lat/lon fields. This lets you see the target launch site without having to load the whole preload set. Signed-off-by: Keith Packard

altos/chaoskey: Add another USB endpoint to read raw data

2016-03-02T21:59:21+00:00

This replaces having the single output switch based on a pin value and allows us to box the device and still fetch raw data. For now, this will use a special libusb2 program, ao-chaosread, to pull bits as I haven't figure out how to make linux provide two /dev entries for one USB device. Signed-off-by: Keith Packard

altos: Add simple stats test to TRNG code

2016-02-08T06:28:34+00:00

This detects broken hardware by making sure the standard deviation in the raw values used to compute each buffer is at least 128. Signed-off-by: Keith Packard

altos: Delay TRNG ADC long enough for HV supply to stabilize

2016-02-07T23:42:28+00:00

Looks like it takes about 70ms for the supply to start running right, so delay after powering it up for that long. Signed-off-by: Keith Packard

altos: Add power management to TRNG driver

2016-02-07T23:42:28+00:00

Support suspend/resume of the TRNG power supply, delaying after resume to wait for it to stabilize. Signed-off-by: Keith Packard

altos/chaoskey: Delay ADC reading for 250ms at startup

2016-01-28T21:58:43+00:00

This lets the HV supply stabilize before we start sampling values. Signed-off-by: Keith Packard