389ff92cc1
* Makefile, Scripts: new linter * About: remove ID from IC * Firmware: remove double define for DIVC/DIVR * Scripts: check folder names too. Docker: replace syntax check with make lint. * Reformat Sources and Migrate to new file naming convention * Docker: symlink clang-format-12 to clang-format * Add coding style guide
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
#include "furi_hal_random.h"
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#include <furi.h>
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#include <furi_hal.h>
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#include <stm32wbxx_ll_rng.h>
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#include <stm32wbxx_ll_hsem.h>
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#include <hw_conf.h>
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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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while(!LL_RNG_IsActiveFlag_DRDY(RNG))
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;
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if((LL_RNG_IsActiveFlag_CECS(RNG)) || (LL_RNG_IsActiveFlag_SECS(RNG))) {
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furi_crash("TRNG error");
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}
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uint32_t random_val = LL_RNG_ReadRandData32(RNG);
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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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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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while(!LL_RNG_IsActiveFlag_DRDY(RNG))
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;
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if((LL_RNG_IsActiveFlag_CECS(RNG)) || (LL_RNG_IsActiveFlag_SECS(RNG))) {
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furi_crash("TRNG error");
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}
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uint32_t random_val = LL_RNG_ReadRandData32(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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}
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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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