Struct rp2040_pac::rosc::RegisterBlock

#[repr(C)]
pub struct RegisterBlock { /* private fields */ }

Register block

Implementations

impl RegisterBlock

pub const fn ctrl(&self) -> &CTRL

0x00 - Ring Oscillator control

pub const fn freqa(&self) -> &FREQA

0x04 - The FREQA & FREQB registers control the frequency by controlling the drive strength of each stage
The drive strength has 4 levels determined by the number of bits set
Increasing the number of bits set increases the drive strength and increases the oscillation frequency
0 bits set is the default drive strength
1 bit set doubles the drive strength
2 bits set triples drive strength
3 bits set quadruples drive strength

pub const fn freqb(&self) -> &FREQB

0x08 - For a detailed description see freqa register

pub const fn dormant(&self) -> &DORMANT

0x0c - Ring Oscillator pause control
This is used to save power by pausing the ROSC
On power-up this field is initialised to WAKE
An invalid write will also select WAKE
Warning: setup the irq before selecting dormant mode

pub const fn div(&self) -> &DIV

0x10 - Controls the output divider

pub const fn phase(&self) -> &PHASE

0x14 - Controls the phase shifted output

pub const fn status(&self) -> &STATUS

0x18 - Ring Oscillator Status

pub const fn randombit(&self) -> &RANDOMBIT

0x1c - This just reads the state of the oscillator output so randomness is compromised if the ring oscillator is stopped or run at a harmonic of the bus frequency