circuitpython/ports/mimxrt/moduos.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