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IDF master 1d7068e4b (#5257)

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esp-dsp: master 7cc5073
esp-face: master 420fc7e
esp-rainmaker: f1b82c7
esp32-camera: master 7a06a7e
esp_littlefs: master b58f00c
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Me No Dev
2021-06-09 13:12:47 +03:00
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parent 7f87d0fc3a
commit 4f9e583b29
606 changed files with 6709 additions and 3956 deletions
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27
tools/sdk/esp32s2/include/esp_hw_support/include/esp_random.h
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@ -24,27 +24,13 @@ extern "C" {
/**
* @brief Get one random 32-bit word from hardware RNG
*
* The hardware RNG produces true random numbers under any of the following conditions:
*
* - An RF subsystem is running (i.e. Bluetooth or WiFi is enabled)
* - An internal entropy source has been enabled by calling bootloader_random_enable()
* and not yet disabled by calling bootloader_random_disable()
* - While the ESP-IDF bootloader is running (due to the internal entropy source being enabled
* for the duration of bootloader execution).
*
* If none of the above conditions are true, the hardware RNG will produce pseudo-random numbers only.
*
* When the hardware RNG is producing true random numbers, external entropy (noise samples) are
* continuously mixed into the internal hardware RNG state. Consult the SoC Technical Reference Manual
* for more details.
* If Wi-Fi or Bluetooth are enabled, this function returns true random numbers. In other
* situations, if true random numbers are required then consult the ESP-IDF Programming
* Guide "Random Number Generation" section for necessary prerequisites.
*
* This function automatically busy-waits to ensure enough external entropy has been
* introduced into the hardware RNG state, before returning a new random number.
*
* If generating random numbers from an app which has not yet enabled Bluetooth or Wi-Fi, call the
* API function bootloader_random_enable() before generating random numbers and then call
* bootloader_random_disable() before using any APIs for Bluetooth, Wi-Fi, ADC, or I2S. Consult the
* bootloader_random.h header for more details.
* introduced into the hardware RNG state, before returning a new random number. This delay
* is very short (always less than 100 CPU cycles).
*
* @return Random value between 0 and UINT32_MAX
*/
@ -53,7 +39,8 @@ uint32_t esp_random(void);
/**
* @brief Fill a buffer with random bytes from hardware RNG
*
* @note This function has the same restrictions regarding available entropy as esp_random()
* @note This function is implemented via calls to esp_random(), so the same
* constraints apply.
*
* @param buf Pointer to buffer to fill with random numbers.
* @param len Length of buffer in bytes