【简介】
从芯片的框图中AES模块中集成TRNG 模块来产生真随机数服务。

以下是文档中对真随机数发生器的描述

我们使用如下代码验证真随机数发生器的功能。
/**
* @file main.c
* @brief True Random Number Generator (TRNG) example
* @details
*/
/******************************************************************************
*
* Copyright (C) 2022-2023 Maxim Integrated Products, Inc. (now owned by
* Analog Devices, Inc.),
* Copyright (C) 2023-2024 Analog Devices, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "mxc_device.h"
#include "nvic_table.h"
#include "trng.h"
volatile int wait;
volatile int callback_result;
/***** Globals *****/
uint8_t var_rnd_no[16] = { 0 };
void TRNG_IRQHandler(void)
{
MXC_TRNG_Handler();
}
void Test_Callback(void *req, int result)
{
wait = 0;
callback_result = result;
}
void print(char *stuff)
{
int i, j, size = 4;
for (i = 0; i < 4; ++i) {
for (j = 0; j < 4; ++j) {
printf("0x%02x ", stuff[i * size + j]);
}
printf("\n");
}
return;
}
void Test_TRNG(int asynchronous)
{
printf(asynchronous ? "\nTest TRNG Async\n" : "\nTest TRNG Sync\n");
int num_bytes = 16;
memset(var_rnd_no, 0, sizeof(var_rnd_no));
MXC_TRNG_Init();
if (asynchronous) {
wait = 1;
NVIC_EnableIRQ(TRNG_IRQn);
MXC_TRNG_RandomAsync(var_rnd_no, num_bytes, &Test_Callback);
while (wait) {}
} else {
MXC_TRNG_Random(var_rnd_no, num_bytes);
}
print((char *)var_rnd_no);
MXC_TRNG_Shutdown();
}
int main(void)
{
printf("\n\n********** TRNG Example **********\n");
Test_TRNG(0);
Test_TRNG(1);
printf("\n********** Test Complete **********\n");
return 0;
}上述代码运行后产同步和中断方式产生四组随机数打印输出如下

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