diff options
Diffstat (limited to 'esp8266')
| -rw-r--r-- | esp8266/etshal.h | 3 | ||||
| -rw-r--r-- | esp8266/moduos.c | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/esp8266/etshal.h b/esp8266/etshal.h index 115ff7a88d..d8a57e8c75 100644 --- a/esp8266/etshal.h +++ b/esp8266/etshal.h @@ -3,6 +3,9 @@ #include <os_type.h> +// see http://esp8266-re.foogod.com/wiki/Random_Number_Generator +#define WDEV_HWRNG ((volatile uint32_t*)0x3ff20e44) + void ets_delay_us(); void ets_intr_lock(void); void ets_intr_unlock(void); diff --git a/esp8266/moduos.c b/esp8266/moduos.c index bef7cddc32..a9f19d7013 100644 --- a/esp8266/moduos.c +++ b/esp8266/moduos.c @@ -34,6 +34,7 @@ #include "py/objstr.h" #include "py/runtime.h" #include "genhdr/mpversion.h" +#include "etshal.h" #include "user_interface.h" extern const mp_obj_type_t mp_fat_vfs_type; @@ -92,9 +93,21 @@ STATIC mp_obj_t os_remove(mp_obj_t path_in) { STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_remove_obj, os_remove); #endif +STATIC mp_obj_t os_urandom(mp_obj_t num) { + mp_int_t n = mp_obj_get_int(num); + vstr_t vstr; + vstr_init_len(&vstr, n); + for (int i = 0; i < n; i++) { + vstr.buf[i] = *WDEV_HWRNG; + } + return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr); +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_urandom_obj, os_urandom); + STATIC const mp_rom_map_elem_t os_module_globals_table[] = { { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uos) }, { MP_ROM_QSTR(MP_QSTR_uname), MP_ROM_PTR(&os_uname_obj) }, + { MP_ROM_QSTR(MP_QSTR_urandom), MP_ROM_PTR(&os_urandom_obj) }, #if MICROPY_VFS_FAT { MP_ROM_QSTR(MP_QSTR_VfsFat), MP_ROM_PTR(&mp_fat_vfs_type) }, { MP_ROM_QSTR(MP_QSTR_listdir), MP_ROM_PTR(&os_listdir_obj) }, |