917410a0a8
* fbt: reworking targets & assets handling WIP * fbt: dist fixes * fbt: moved SD card resources to owning apps * unit_tests: moved resources to app folder * github: updated unit_tests paths * github: packaging fixes * unit_tests: fixes * fbt: assets: internal cleanup * fbt: reworked assets handling * github: unit_tests: reintroducing fixes * minor cleanup * fbt: naming changes to reflect private nature of scons tools * fbt: resources: fixed dist archive paths * docs: updated paths * docs: updated more paths * docs: included "resources" parameter in app manifest docs; updated assets readme * updated gitignore for assets * github: updated action versions * unit_tests: restored timeout; scripts: assets: logging changes * gh: don't upload desktop animations for unit test run Co-authored-by: あく <alleteam@gmail.com>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
#include <furi_hal_random.h>
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#include <furi_hal_bus.h>
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#include <furi.h>
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#include <stm32wbxx_ll_rng.h>
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#include <stm32wbxx_ll_rcc.h>
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#include <stm32wbxx_ll_hsem.h>
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#include <hsem_map.h>
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#define TAG "FuriHalRandom"
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static uint32_t furi_hal_random_read_rng() {
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while(LL_RNG_IsActiveFlag_CECS(RNG) && LL_RNG_IsActiveFlag_SECS(RNG) &&
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!LL_RNG_IsActiveFlag_DRDY(RNG)) {
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/* Error handling as described in RM0434, pg. 582-583 */
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if(LL_RNG_IsActiveFlag_CECS(RNG)) {
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/* Clock error occurred */
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LL_RNG_ClearFlag_CEIS(RNG);
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}
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if(LL_RNG_IsActiveFlag_SECS(RNG)) {
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/* Noise source error occurred */
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LL_RNG_ClearFlag_SEIS(RNG);
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for(uint32_t i = 0; i < 12; ++i) {
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const volatile uint32_t discard = LL_RNG_ReadRandData32(RNG);
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UNUSED(discard);
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}
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}
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}
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return LL_RNG_ReadRandData32(RNG);
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}
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void furi_hal_random_init() {
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furi_hal_bus_enable(FuriHalBusRNG);
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LL_RCC_SetRNGClockSource(LL_RCC_RNG_CLKSOURCE_CLK48);
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}
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uint32_t furi_hal_random_get() {
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while(LL_HSEM_1StepLock(HSEM, CFG_HW_RNG_SEMID))
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;
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LL_RNG_Enable(RNG);
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const uint32_t random_val = furi_hal_random_read_rng();
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LL_RNG_Disable(RNG);
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;
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LL_HSEM_ReleaseLock(HSEM, CFG_HW_RNG_SEMID, 0);
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return random_val;
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}
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void furi_hal_random_fill_buf(uint8_t* buf, uint32_t len) {
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while(LL_HSEM_1StepLock(HSEM, CFG_HW_RNG_SEMID))
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;
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LL_RNG_Enable(RNG);
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for(uint32_t i = 0; i < len; i += 4) {
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const uint32_t random_val = furi_hal_random_read_rng();
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uint8_t len_cur = ((i + 4) < len) ? (4) : (len - i);
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memcpy(&buf[i], &random_val, len_cur);
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}
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LL_RNG_Disable(RNG);
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LL_HSEM_ReleaseLock(HSEM, CFG_HW_RNG_SEMID, 0);
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}
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void srand(unsigned seed) {
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UNUSED(seed);
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}
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int rand() {
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return (furi_hal_random_get() & RAND_MAX);
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}
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long random() {
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return (furi_hal_random_get() & RAND_MAX);
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}
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