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 12 #include "hardware/address_mapped.h" 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 23 typedef 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; 48 } systick_hw_t; 49 50 #define systick_hw ((systick_hw_t *)(PPB_BASE + M0PLUS_SYST_CSR_OFFSET)) 51 52 #endif 53