CC2745R10-Q1: How to generate true random numbers using CC2745

Toshiki Nakamura

Part Number: CC2745R10-Q1

Tool/software:

Hi,

If I want to generate true random numbers with TRNG_getRandomBytes() in the following environment,

do I need to switch to true random numbers with TRNGLPF3HSM_switchNrbgMode() as described in the following document? (If you don't switch, will pseudo-random numbers be generated?)

environment：

・CC2745R10-Q1

・"simplelink_lowpower_f3_sdk_9_10_00_83" and "simplelink_lowpower_f3_sdk_8_30_00_11_ea"

file:///C:/ti/simplelink_lowpower_f3_sdk_9_10_00_83/docs/secure_drivers/doxygen/html/_t_r_n_g_8h.html

Also, please let me know if there is any documentation that describes how to use TRNGLPF3HSM_switchNrbgMode() and its restrictions.

2 months ago

0 Nima 2 months ago

TI__Genius 14565 points

Hello,

You will need to switch to the TRNG by calling the following:

TRNGLPF3HSM_switchNrbgMode(trng_handle, TRNG_MODE_TRNG);

Note that it will take about a second to switch modes, and a little bit longer to generate random bytes.

Best,

Nima Behmanesh

0 Toshiki Nakamura 2 months ago in reply to Nima

Prodigy 240 points

Hello,

Are there any restrictions on TRNGLPF3HSM_switchNrbgMode(), such as it not being able to respond without an OS?

In the case of nortos, when trying to switch to TRNG mode, it freezes at the following point.

In the case of freertos, you can switch without freezing.

0 Nima 2 months ago in reply to Toshiki Nakamura

TI__Genius 14565 points

Hello,

Sorry for the delay here: Yes, you need an RTOS for this function.

Best,

Nima Behmanesh

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CC2745R10-Q1: How to generate true random numbers using CC2745