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Added nRF hardware RNG

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This commit is contained in:
Mark Qvist 2025-04-13 14:45:31 +02:00
parent 16dedc72c2
commit 0a95f6f107
2 changed files with 37 additions and 4 deletions
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16
RNode_Firmware.ino
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@ -94,14 +94,24 @@ void setup() {
#endif
// Seed the PRNG for CSMA R-value selection
# if MCU_VARIANT == MCU_ESP32
#if MCU_VARIANT == MCU_ESP32
// On ESP32, get the seed value from the
// hardware RNG
int seed_val = (int)esp_random();
unsigned long seed_val = (unsigned long)esp_random();
#elif MCU_VARIANT == MCU_NRF52
// On nRF, get the seed value from the
// hardware RNG
unsigned long seed_val = get_rng_seed();
#else
// Otherwise, get a pseudo-random seed
// value from an unconnected analog pin
int seed_val = analogRead(0);
//
// CAUTION! If you are implementing the
// firmware on a platform that does not
// have a hardware RNG, you MUST take
// care to get a seed value with enough
// entropy at each device reset!
unsigned long seed_val = analogRead(0);
#endif
randomSeed(seed_val);