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51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2018 Inria
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* SPDX-License-Identifier: LGPL-2.1-only
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*/
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#pragma once
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/**
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* @ingroup boards_common_nrf52
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* @{
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*
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* @file
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* @brief Default RTT configuration for nRF52 based boards
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*
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* @author Alexandre Abadie <alexandre.abadie@inria.fr>
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*
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @name Real time counter configuration
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* @{
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*/
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#ifndef RTT_DEV
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#define RTT_DEV (1) /* NRF_RTC1 */
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#endif
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#define RTT_MAX_VALUE (0x00ffffff) /* 24bit */
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#define RTT_MAX_FREQUENCY (32768U) /* in Hz */
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#define RTT_MIN_FREQUENCY (8U) /* in Hz */
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#define RTT_CLOCK_FREQUENCY (32768U) /* in Hz, LFCLK*/
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/**
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* Default offset of 2 ticks is not enough, see figures 8 and 9 in
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* https://docs.nordicsemi.com/bundle/ps_nrf52840/page/rtc.html.
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*/
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#define RTT_MIN_OFFSET (3U)
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#ifndef RTT_FREQUENCY
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#define RTT_FREQUENCY (1024U) /* in Hz */
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#endif
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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