Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Enable (t)rng support for STM32H7 and NANO RP2040 #895

Merged
merged 2 commits into from
Jun 28, 2024
Merged

Enable (t)rng support for STM32H7 and NANO RP2040 #895

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d7d5515
Enable trng support for STM32H7 boards
pennam Jun 13, 2024
447062f
Enable (t)rng support for NANO RP2040
pennam Jun 17, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
33 changes: 33 additions & 0 deletions cores/arduino/WMath.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,10 +23,36 @@

extern "C" {
#include "stdlib.h"
#include "hal/trng_api.h"
}
#if defined(ARDUINO_NANO_RP2040_CONNECT) || \
defined(ARDUINO_PORTENTA_H7_M7) || \
defined(ARDUINO_NICLA_VISION) || \
defined(ARDUINO_OPTA) || \
defined(ARDUINO_GIGA)
#define MBED_TRNG_SUPPORT 1
static long trng()
{
trng_t trng_obj;
trng_init(&trng_obj);
long value;
size_t olen;
if (trng_get_bytes(&trng_obj, (uint8_t*)&value, sizeof(value), &olen) != 0)
return -1;
trng_free(&trng_obj);
return value >= 0 ? value : -value;
}
#endif

#if (MBED_TRNG_SUPPORT == 1)
static bool useTRNG = true;
#endif

void randomSeed(unsigned long seed)
{
#if (MBED_TRNG_SUPPORT == 1)
useTRNG = false;
#endif
if (seed != 0) {
srandom(seed);
}
Expand All @@ -37,6 +63,11 @@ long random(long howbig)
if (howbig == 0) {
return 0;
}
#if (MBED_TRNG_SUPPORT == 1)
if (useTRNG == true) {
return trng() % howbig;
}
#endif
return random() % howbig;
}

Expand All @@ -48,3 +79,5 @@ long random(long howsmall, long howbig)
long diff = howbig - howsmall;
return random(diff) + howsmall;
}

#undef MBED_TRNG_SUPPORT
Loading
Loading