src/rp2040/hardware_structs/include/hardware/structs/rosc.h

// THIS HEADER FILE IS AUTOMATICALLY GENERATED -- DO NOT EDIT

/**
 * Copyright (c) 2024 Raspberry Pi Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#ifndef _HARDWARE_STRUCTS_ROSC_H
#define _HARDWARE_STRUCTS_ROSC_H

/**
 * \file rp2040/rosc.h
 */

#include "hardware/address_mapped.h"
#include "hardware/regs/rosc.h"

// Reference to datasheet: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf#tab-registerlist_rosc
//
// The _REG_ macro is intended to help make the register navigable in your IDE (for example, using the "Go to Definition" feature)
// _REG_(x) will link to the corresponding register in hardware/regs/rosc.h.
//
// Bit-field descriptions are of the form:
// BITMASK [BITRANGE] FIELDNAME (RESETVALUE) DESCRIPTION

typedef struct {
    _REG_(ROSC_CTRL_OFFSET) // ROSC_CTRL
    // Ring Oscillator control
    // 0x00fff000 [23:12] ENABLE       (-) On power-up this field is initialised to ENABLE +
    // 0x00000fff [11:0]  FREQ_RANGE   (0xaa0) Controls the number of delay stages in the ROSC ring +
    io_rw_32 ctrl;
 
    _REG_(ROSC_FREQA_OFFSET) // ROSC_FREQA
    // Ring Oscillator frequency control A
    // 0xffff0000 [31:16] PASSWD       (0x0000) Set to 0x9696 to apply the settings +
    // 0x00007000 [14:12] DS3          (0x0) Stage 3 drive strength
    // 0x00000700 [10:8]  DS2          (0x0) Stage 2 drive strength
    // 0x00000070 [6:4]   DS1          (0x0) Stage 1 drive strength
    // 0x00000007 [2:0]   DS0          (0x0) Stage 0 drive strength
    io_rw_32 freqa;
 
    _REG_(ROSC_FREQB_OFFSET) // ROSC_FREQB
    // Ring Oscillator frequency control B
    // 0xffff0000 [31:16] PASSWD       (0x0000) Set to 0x9696 to apply the settings +
    // 0x00007000 [14:12] DS7          (0x0) Stage 7 drive strength
    // 0x00000700 [10:8]  DS6          (0x0) Stage 6 drive strength
    // 0x00000070 [6:4]   DS5          (0x0) Stage 5 drive strength
    // 0x00000007 [2:0]   DS4          (0x0) Stage 4 drive strength
    io_rw_32 freqb;
 
    _REG_(ROSC_DORMANT_OFFSET) // ROSC_DORMANT
    // Ring Oscillator pause control
    // 0xffffffff [31:0]  DORMANT      (-) This is used to save power by pausing the ROSC +
    io_rw_32 dormant;
 
    _REG_(ROSC_DIV_OFFSET) // ROSC_DIV
    // Controls the output divider
    // 0x00000fff [11:0]  DIV          (-) set to 0xaa0 + div where +
    io_rw_32 div;
 
    _REG_(ROSC_PHASE_OFFSET) // ROSC_PHASE
    // Controls the phase shifted output
    // 0x00000ff0 [11:4]  PASSWD       (0x00) set to 0xaa +
    // 0x00000008 [3]     ENABLE       (1) enable the phase-shifted output +
    // 0x00000004 [2]     FLIP         (0) invert the phase-shifted output +
    // 0x00000003 [1:0]   SHIFT        (0x0) phase shift the phase-shifted output by SHIFT input clocks +
    io_rw_32 phase;
 
    _REG_(ROSC_STATUS_OFFSET) // ROSC_STATUS
    // Ring Oscillator Status
    // 0x80000000 [31]    STABLE       (0) Oscillator is running and stable
    // 0x01000000 [24]    BADWRITE     (0) An invalid value has been written to CTRL_ENABLE or...
    // 0x00010000 [16]    DIV_RUNNING  (-) post-divider is running +
    // 0x00001000 [12]    ENABLED      (-) Oscillator is enabled but not necessarily running and stable +
    io_rw_32 status;
 
    _REG_(ROSC_RANDOMBIT_OFFSET) // ROSC_RANDOMBIT
    // Returns a 1 bit random value
    // 0x00000001 [0]     RANDOMBIT    (1) 
    io_ro_32 randombit;
 
    _REG_(ROSC_COUNT_OFFSET) // ROSC_COUNT
    // A down counter running at the ROSC frequency which counts to zero and stops.
    // 0x000000ff [7:0]   COUNT        (0x00) 
    io_rw_32 count;
} rosc_hw_t;

#define rosc_hw ((rosc_hw_t *)ROSC_BASE)
static_assert(sizeof (rosc_hw_t) == 0x0024, "");

#endif // _HARDWARE_STRUCTS_ROSC_H