138 lines
6.6 KiB
C
138 lines
6.6 KiB
C
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//*****************************************************************************
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//
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// am_reg_systick.h
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//! @file
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//!
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//! @brief Register macros for the SYSTICK module
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2017, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_REG_SYSTICK_H
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#define AM_REG_SYSTICK_H
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//*****************************************************************************
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//
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// Instance finder. (1 instance(s) available)
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//
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//*****************************************************************************
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#define AM_REG_SYSTICK_NUM_MODULES 1
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#define AM_REG_SYSTICKn(n) \
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(REG_SYSTICK_BASEADDR + 0x00000000 * n)
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//*****************************************************************************
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//
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// Register offsets.
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//
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//*****************************************************************************
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#define AM_REG_SYSTICK_SYSTCSR_O 0xE000E010
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#define AM_REG_SYSTICK_SYSTRVR_O 0xE000E014
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#define AM_REG_SYSTICK_SYSTCVR_O 0xE000E018
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#define AM_REG_SYSTICK_SYSTCALIB_O 0xE000E01C
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//*****************************************************************************
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//
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// SYSTICK_SYSTCSR - SysTick Control and Status Register.
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//
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//*****************************************************************************
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// Returns 1 if timer counted to 0 since last time this was read.
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#define AM_REG_SYSTICK_SYSTCSR_COUNTFLAG_S 16
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#define AM_REG_SYSTICK_SYSTCSR_COUNTFLAG_M 0x00010000
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#define AM_REG_SYSTICK_SYSTCSR_COUNTFLAG(n) (((uint32_t)(n) << 16) & 0x00010000)
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// Enables SysTick exception request. Software can use COUNTFLAG to determine if
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// SysTick has ever counted to zero. 0 = counting down to zero does not assert
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// the SysTick exception request; 1 = counting down to zero asserts the SysTick
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// exception request.
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#define AM_REG_SYSTICK_SYSTCSR_TICKINT_S 1
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#define AM_REG_SYSTICK_SYSTCSR_TICKINT_M 0x00000002
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#define AM_REG_SYSTICK_SYSTCSR_TICKINT(n) (((uint32_t)(n) << 1) & 0x00000002)
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// Enables the counter. 0 = counter disabled; 1 = counter enabled.
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#define AM_REG_SYSTICK_SYSTCSR_ENABLE_S 0
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#define AM_REG_SYSTICK_SYSTCSR_ENABLE_M 0x00000001
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#define AM_REG_SYSTICK_SYSTCSR_ENABLE(n) (((uint32_t)(n) << 0) & 0x00000001)
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//*****************************************************************************
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//
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// SYSTICK_SYSTRVR - SysTick Reload Value Register.
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//
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//*****************************************************************************
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// Value to load into the SYSTCVR register when the counter is enabled and when
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// it reaches 0.
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#define AM_REG_SYSTICK_SYSTRVR_RELOAD_S 0
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#define AM_REG_SYSTICK_SYSTRVR_RELOAD_M 0x00FFFFFF
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#define AM_REG_SYSTICK_SYSTRVR_RELOAD(n) (((uint32_t)(n) << 0) & 0x00FFFFFF)
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//*****************************************************************************
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//
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// SYSTICK_SYSTCVR - SysTick Current Value Register.
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//
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//*****************************************************************************
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// Reads return the current value of the SysTick counter. A write of any value
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// clears the field to 0, and also clears the SYSTCSR COUNTFLAG bit to 0.
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#define AM_REG_SYSTICK_SYSTCVR_CURRENT_S 0
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#define AM_REG_SYSTICK_SYSTCVR_CURRENT_M 0x00FFFFFF
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#define AM_REG_SYSTICK_SYSTCVR_CURRENT(n) (((uint32_t)(n) << 0) & 0x00FFFFFF)
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//*****************************************************************************
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//
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// SYSTICK_SYSTCALIB - SysTick Calibration Value Register.
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//
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//*****************************************************************************
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// Indicates whether the device provides a reference clock to the processor. 0 =
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// reference clock provided; 1 = no reference clock provided. If your device
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// does not provide a reference clock, the SYST_CSR.CLKSOURCE bit reads-as-one
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// and ignores writes.
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#define AM_REG_SYSTICK_SYSTCALIB_NOREF_S 31
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#define AM_REG_SYSTICK_SYSTCALIB_NOREF_M 0x80000000
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#define AM_REG_SYSTICK_SYSTCALIB_NOREF(n) (((uint32_t)(n) << 31) & 0x80000000)
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// Indicates whether the TENMS value is exact. 0 = TENMS value is exact; 1 =
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// TENMS value is inexact, or not given. An inexact TENMS value can affect the
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// suitability of SysTick as a software real time clock.
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#define AM_REG_SYSTICK_SYSTCALIB_SKEW_S 30
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#define AM_REG_SYSTICK_SYSTCALIB_SKEW_M 0x40000000
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#define AM_REG_SYSTICK_SYSTCALIB_SKEW(n) (((uint32_t)(n) << 30) & 0x40000000)
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// Reload value for 10ms (100Hz) timing, subject to system clock skew errors. If
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// the value reads as zero, the calibration value is not known.
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#define AM_REG_SYSTICK_SYSTCALIB_TENMS_S 0
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#define AM_REG_SYSTICK_SYSTCALIB_TENMS_M 0x00FFFFFF
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#define AM_REG_SYSTICK_SYSTCALIB_TENMS(n) (((uint32_t)(n) << 0) & 0x00FFFFFF)
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#endif // AM_REG_SYSTICK_H
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