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RZ_A1LU: Fix TRNG function #5970

Merged
merged 1 commit into from
Feb 8, 2018
Merged

RZ_A1LU: Fix TRNG function #5970

merged 1 commit into from
Feb 8, 2018

Commits on Feb 6, 2018

  1. [RZ_A1LU] Fix TRNG function 

    Related to the review of ARMmbed#5857, I fixed the TRNG function for GR-LYCHEE.
- I modified to zeroize "recv_data" before the function return.
- I added the processing that check the return value of I2C.read function. If return value is error, "output" is zeroized before function return.
- In trng_get_bytes_esp32 function, there is a time lag in the period from ESP32 reset to start working, error may occur when "Write" is called. Thus, I added a retry counter due to address this concern. There is not this counter for "Read" since it is called after "Write".
    @TomoYamanaka
    TomoYamanaka committed Feb 6, 2018
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