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63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2018 Gunar Schorcht
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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_esp32
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* @brief Board definitions that are common for all ESP32 boards.
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*
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* This file contains board configurations that are valid for all ESP32.
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*
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* For detailed information about the configuration of ESP32 boards, see
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* section \ref esp32_peripherals "Common Peripherals".
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*
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* @author Gunar Schorcht <gunar@schorcht.net>
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* @file
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* @{
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*/
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/**
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* @brief External clock crystal frequency (MHz)
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*
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* Most boards use a 40MHz crystal, including all those based on Espressif's
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* WROOM-32 and WROVER-32 modules. Those that don't, like the SparkFun ESP32
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* Thing (26MHz), must define ESP32_XTAL_FREQ appropriately in their board
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* configuration.
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*
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* An obvious side effect of a mismatch is that the UART won't sync and the
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* development terminal will show garbage instead of log output.
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*/
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#ifndef ESP32_XTAL_FREQ
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#define ESP32_XTAL_FREQ (40)
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#endif
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#if !DOXYGEN
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/**
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* @name ztimer Configuration valid for all ESP32 boards
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* @{
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*/
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#if CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ <= 80
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# define CONFIG_ZTIMER_USEC_ADJUST_SET (880/CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ)
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# define CONFIG_ZTIMER_USEC_ADJUST_SLEEP ((CONFIG_ZTIMER_USEC_ADJUST_SET >> 2) * 5)
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#else
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# define CONFIG_ZTIMER_USEC_ADJUST_SET (960/CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ)
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# define CONFIG_ZTIMER_USEC_ADJUST_SLEEP (CONFIG_ZTIMER_USEC_ADJUST_SET + 1)
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#endif
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/** @} */
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#endif /* !DOXYGEN */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __cplusplus
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} /* end extern "C" */
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#endif
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/** @} */
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