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Merge pull request #9318 from caixue1102/mbed-os-rda 

fix bug for RDA UNO_91H：calling us ticker functions without init.
pull/9498/head
Cruz Monrreal 2019-01-24 13:25:58 -06:00 committed by GitHub
parent 2941c8d3f9 9e3ba59655
commit 899ea5991c
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1 changed files with 2 additions and 0 deletions
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targets/TARGET_RDA/TARGET_UNO_91H/trng_api.c
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@ -70,6 +70,8 @@ void trng_init(trng_t *obj)
regval = rTRNG_CTRL | ((0x01UL << 4) | (0xFFUL << 16));
rTRNG_CTRL = regval & ~((0x01UL << 1) | (0x01UL << 2) | (0x01UL << 3));
us_ticker_init();
/*Entropy data was mixed by TRNG seed and noise, so we add one 32us delay to
ensure all 32 bits of seed is entropy when init and
another delay to update noise data when get data.