85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2016 Damien P. George
|
|
*
|
|
* use of the TRNG by
|
|
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
|
|
* Copyright (c) 2019 Artur Pacholec
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/mphal.h"
|
|
#include "fsl_trng.h"
|
|
|
|
static bool initialized = false;
|
|
|
|
STATIC void trng_start(void) {
|
|
trng_config_t trngConfig;
|
|
|
|
if (!initialized) {
|
|
TRNG_GetDefaultConfig(&trngConfig);
|
|
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
|
|
|
|
TRNG_Init(TRNG, &trngConfig);
|
|
initialized = true;
|
|
}
|
|
}
|
|
|
|
uint32_t trng_random_u32(void) {
|
|
uint32_t rngval;
|
|
|
|
trng_start();
|
|
TRNG_GetRandomData(TRNG, (uint8_t *)&rngval, 4);
|
|
return rngval;
|
|
}
|
|
|
|
#if MICROPY_PY_UOS_URANDOM
|
|
STATIC mp_obj_t mp_uos_urandom(mp_obj_t num) {
|
|
mp_int_t n = mp_obj_get_int(num);
|
|
vstr_t vstr;
|
|
vstr_init_len(&vstr, n);
|
|
|
|
trng_start();
|
|
TRNG_GetRandomData(TRNG, vstr.buf, n);
|
|
|
|
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_uos_urandom_obj, mp_uos_urandom);
|
|
#endif
|
|
|
|
#if MICROPY_PY_UOS_DUPTERM_NOTIFY
|
|
STATIC mp_obj_t mp_uos_dupterm_notify(mp_obj_t obj_in) {
|
|
(void)obj_in;
|
|
for (;;) {
|
|
int c = mp_uos_dupterm_rx_chr();
|
|
if (c < 0) {
|
|
break;
|
|
}
|
|
ringbuf_put(&stdin_ringbuf, c);
|
|
}
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_uos_dupterm_notify_obj, mp_uos_dupterm_notify);
|
|
#endif
|