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systick.h
1// THIS HEADER FILE IS AUTOMATICALLY GENERATED -- DO NOT EDIT
2
3/*
4 * Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8
9#ifndef _HARDWARE_STRUCTS_SYSTICK_H
10#define _HARDWARE_STRUCTS_SYSTICK_H
11
13#include "hardware/regs/m0plus.h"
14
15// Reference to datasheet: https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf#tab-registerlist_m0plus
16//
17// The _REG_ macro is intended to help make the register navigable in your IDE (for example, using the "Go to Definition" feature)
18// _REG_(x) will link to the corresponding register in hardware/regs/m0plus.h.
19//
20// Bit-field descriptions are of the form:
21// BITMASK [BITRANGE]: FIELDNAME (RESETVALUE): DESCRIPTION
22
23typedef struct {
24 _REG_(M0PLUS_SYST_CSR_OFFSET) // M0PLUS_SYST_CSR
25 // Use the SysTick Control and Status Register to enable the SysTick features
26 // 0x00010000 [16] : COUNTFLAG (0): Returns 1 if timer counted to 0 since last time this was read
27 // 0x00000004 [2] : CLKSOURCE (0): SysTick clock source
28 // 0x00000002 [1] : TICKINT (0): Enables SysTick exception request:
29 // 0x00000001 [0] : ENABLE (0): Enable SysTick counter:
30 io_rw_32 csr;
31
32 _REG_(M0PLUS_SYST_RVR_OFFSET) // M0PLUS_SYST_RVR
33 // Use the SysTick Reload Value Register to specify the start value to load into the current value register when the...
34 // 0x00ffffff [23:0] : RELOAD (0): Value to load into the SysTick Current Value Register when the counter reaches 0
35 io_rw_32 rvr;
36
37 _REG_(M0PLUS_SYST_CVR_OFFSET) // M0PLUS_SYST_CVR
38 // Use the SysTick Current Value Register to find the current value in the register
39 // 0x00ffffff [23:0] : CURRENT (0): Reads return the current value of the SysTick counter
40 io_rw_32 cvr;
41
42 _REG_(M0PLUS_SYST_CALIB_OFFSET) // M0PLUS_SYST_CALIB
43 // Use the SysTick Calibration Value Register to enable software to scale to any required speed using divide and multiply
44 // 0x80000000 [31] : NOREF (0): If reads as 1, the Reference clock is not provided - the CLKSOURCE bit of the...
45 // 0x40000000 [30] : SKEW (0): If reads as 1, the calibration value for 10ms is inexact (due to clock frequency)
46 // 0x00ffffff [23:0] : TENMS (0): An optional Reload value to be used for 10ms (100Hz) timing, subject to system clock...
47 io_ro_32 calib;
49
50#define systick_hw ((systick_hw_t *)(PPB_BASE + M0PLUS_SYST_CSR_OFFSET))
51
52#endif
Definition systick.h:23