82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
/****************************************************************************
|
|
* boards/xtensa/esp32s2/esp32s2-saola-1/include/board.h
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __BOARDS_XTENSA_ESP32S2_ESP32S2_SAOLA_1_INCLUDE_BOARD_H
|
|
#define __BOARDS_XTENSA_ESP32S2_ESP32S2_SAOLA_1_INCLUDE_BOARD_H
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Clocking *****************************************************************/
|
|
|
|
/* The ESP32S2 board V2 is fitted with a 40MHz crystal */
|
|
|
|
#define BOARD_XTAL_FREQUENCY 40000000
|
|
|
|
/* Clock reconfiguration is currently disabled, so the CPU will be running
|
|
* at the XTAL frequency or at two times the XTAL frequency, depending upon
|
|
* how we load the code:
|
|
*
|
|
* - If we load the code into FLASH at address 0x1000 where it is started by
|
|
* the second level bootloader, then the frequency is the crystal
|
|
* frequency.
|
|
* - If we load the code into IRAM after the second level bootloader has run
|
|
* this frequency will be twice the crystal frequency.
|
|
*
|
|
* Don't ask me for an explanation.
|
|
*/
|
|
|
|
/* Note: The bootloader (esp-idf bootloader.bin) configures:
|
|
*
|
|
* - CPU frequency to 80MHz
|
|
* - The XTAL frequency according to the SDK config CONFIG_ESP32S2_XTAL_FREQ,
|
|
* which is 40MHz by default.
|
|
*
|
|
* Reference:
|
|
* https://github.com/espressif/esp-idf/blob
|
|
* /6fd855ab8d00d23bad4660216bc2122c2285d5be/components
|
|
* /bootloader_support/src/bootloader_clock.c#L38-L62
|
|
*/
|
|
|
|
#ifdef CONFIG_ESP32S2_RUN_IRAM
|
|
# define BOARD_CLOCK_FREQUENCY (2 * BOARD_XTAL_FREQUENCY)
|
|
#else
|
|
#ifdef CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ
|
|
# define BOARD_CLOCK_FREQUENCY (CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ * 1000000)
|
|
#else
|
|
# define BOARD_CLOCK_FREQUENCY 80000000
|
|
#endif
|
|
#endif
|
|
|
|
/* LED definitions **********************************************************/
|
|
|
|
/* Define how many LEDs this board has (needed by userleds) */
|
|
|
|
#define BOARD_NLEDS 1
|
|
|
|
/* GPIO pins used by the GPIO Subsystem */
|
|
|
|
#define BOARD_NGPIOOUT 2 /* Amount of GPIO Output pins */
|
|
#define BOARD_NGPIOIN 1 /* Amount of GPIO Input without Interruption */
|
|
#define BOARD_NGPIOINT 1 /* Amount of GPIO Input w/ Interruption pins */
|
|
|
|
#endif /* __BOARDS_XTENSA_ESP32S2_ESP32S2_SAOLA_1_INCLUDE_BOARD_H */
|