Struct cc2650::trng::cfg0::W

pub struct W { /* fields omitted */ }

Value to write to the register

Methods

impl W

pub fn reset_value() -> W

Reset value of the register

pub unsafe fn bits(&mut self, bits: u32) -> &mut Self

Writes raw bits to the register

pub fn max_refill_cycles(&mut self) -> _MAX_REFILL_CYCLESW

Bits 16:31 - This field determines the maximum number of samples (between 2^8 and 2^24) taken to re-generate entropy from the FROs after reading out a 64 bits random number. If the written value of this field is zero, the number of samples is 2^24, otherwise the number of samples equals the written value times 2^8. 0x0000: 2^24 samples 0x0001: 12^8 samples 0x0002: 22^8 samples 0x0003: 32^8 samples ... 0x8000: 327682^8 samples 0xC000: 491522^8 samples ... 0xFFFF: 655352^8 samples This field can only be modified while CTL.TRNG_EN is 0.

pub fn smpl_div(&mut self) -> _SMPL_DIVW

Bits 8:11 - This field directly controls the number of clock cycles between samples taken from the FROs. Default value 0 indicates that samples are taken every clock cycle, maximum value 0xF takes one sample every 16 clock cycles. This field must be set to a value such that the slowest FRO (even under worst-case conditions) has a cycle time less than twice the sample period. This field can only be modified while CTL.TRNG_EN is '0'.

pub fn min_refill_cycles(&mut self) -> _MIN_REFILL_CYCLESW

Bits 0:7 - This field determines the minimum number of samples (between 2^6 and 2^14) taken to re-generate entropy from the FROs after reading out a 64 bits random number. If the value of this field is zero, the number of samples is fixed to the value determined by the MAX_REFILL_CYCLES field, otherwise the minimum number of samples equals the written value times 64 (which can be up to 2^14). To ensure same entropy in all generated random numbers the value 0 should be used. Then MAX_REFILL_CYCLES controls the minimum refill interval. The number of samples defined here cannot be higher than the number defined by the 'max_refill_cycles' field (i.e. that field takes precedence). No random value will be created if min refill > max refill. This field can only be modified while CTL.TRNG_EN = 0. 0x00: Minimum samples = MAX_REFILL_CYCLES (all numbers have same entropy) 0x01: 12^6 samples 0x02: 22^6 samples ... 0xFF: 255*2^6 samples