kopia lustrzana https://github.com/espressif/esp-idf
61 wiersze
1.8 KiB
C
61 wiersze
1.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @brief
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* This file is for MSPI timinig tuning private APIs
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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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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* @brief Make MSPI work under 20Mhz, remove the timing tuning required delays.
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* @param control_spi1 Select whether to control SPI1. For tuning, we need to use SPI1. After tuning (during startup stage), let the flash driver to control SPI1
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*/
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void mspi_timing_enter_low_speed_mode(bool control_spi1);
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/**
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* @brief Make MSPI work under the frequency as users set, may add certain delays to MSPI RX direction to meet timing requirements.
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* @param control_spi1 Select whether to control SPI1. For tuning, we need to use SPI1. After tuning (during startup stage), let the flash driver to control SPI1
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*/
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void mspi_timing_enter_high_speed_mode(bool control_spi1);
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/**
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* @brief Switch MSPI into low speed mode / high speed mode.
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* @note This API is cache safe, it will freeze both D$ and I$ and restore them after MSPI is switched
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* @note For some of the MSPI high frequency settings (e.g. 80M DDR mode Flash or PSRAM), timing tuning is required.
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* Certain delays will be added to the MSPI RX direction. When CPU clock switches from PLL to XTAL, should call
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* this API first to enter MSPI low speed mode to remove the delays, and vice versa.
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*/
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void mspi_timing_change_speed_mode_cache_safe(bool switch_down);
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/**
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* @brief Tune MSPI flash timing to make it work under high frequency
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*/
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void mspi_timing_flash_tuning(void);
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/**
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* @brief Tune MSPI psram timing to make it work under high frequency
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*/
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void mspi_timing_psram_tuning(void);
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/**
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* @brief Set MSPI pin default pin drive
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*/
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void mspi_timing_set_pin_drive_strength(void);
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#ifdef __cplusplus
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}
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#endif
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