nuttx/boards/xtensa/esp32/ttgo_eink5_v2/include/board.h
2022-06-28 09:34:17 -03:00

94 lines
3.4 KiB
C

/****************************************************************************
* boards/xtensa/esp32/ttgo_eink5_v2/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_ESP32_TTGO_EINK_5_V2_INCLUDE_BOARD_H
#define __BOARDS_XTENSA_ESP32_TTGO_EINK_5_V2_INCLUDE_BOARD_H
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Clocking *****************************************************************/
/* The ESP32 Core board V2 is fitted with either a 26 a 40MHz crystal */
#ifdef CONFIG_ESP32_XTAL_26MHz
# define BOARD_XTAL_FREQUENCY 26000000
#else
# define BOARD_XTAL_FREQUENCY 40000000
#endif
/* 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_ESP32_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_ESP32_RUN_IRAM
# define BOARD_CLOCK_FREQUENCY (2 * BOARD_XTAL_FREQUENCY)
#else
#ifdef CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ
# define BOARD_CLOCK_FREQUENCY (CONFIG_ESP32_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 1 /* 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 */
/* E-INK SSD1680 */
#define DISPLAY_DC 19
#define DISPLAY_RST 12
#define DISPLAY_BUSY 4
#define DISPLAY_CS 5
#define DISPLAY_SPI_BUS 3
#endif /* __BOARDS_XTENSA_ESP32_TTGO_EINK_5_V2_INCLUDE_BOARD_H */