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esp_rom_sys.h
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esp_rom_sys.h
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/*
* SPDX-FileCopyrightText: 2010-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "sdkconfig.h"
#include <stdint.h>
#include "soc/reset_reasons.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Software Reset digital core include RTC.
*
* It is not recommended to use this function in esp-idf, use
* esp_restart() instead.
*/
void esp_rom_software_reset_system(void);
/**
* @brief Software Reset cpu core.
*
* It is not recommended to use this function in esp-idf, use
* esp_restart() instead.
*
* @param cpu_no : The CPU to reset, 0 for PRO CPU, 1 for APP CPU.
*/
void esp_rom_software_reset_cpu(int cpu_no);
/**
* @brief Print formated string to console device
* @note float and long long data are not supported!
*
* @param fmt Format string
* @param ... Additional arguments, depending on the format string
* @return int: Total number of characters written on success; A negative number on failure.
*/
int esp_rom_printf(const char *fmt, ...);
/**
* @brief Pauses execution for us microseconds
*
* @param us Number of microseconds to pause
*/
void esp_rom_delay_us(uint32_t us);
/**
* @brief esp_rom_printf can print message to different channels simultaneously.
* This function can help install the low level putc function for esp_rom_printf.
*
* @param channel Channel number (startting from 1)
* @param putc Function pointer to the putc implementation. Set NULL can disconnect esp_rom_printf with putc.
*/
void esp_rom_install_channel_putc(int channel, void (*putc)(char c));
/**
* @brief Install UART1 as the default console channel, equivalent to `esp_rom_install_channel_putc(1, esp_rom_uart_putc)`
*/
void esp_rom_install_uart_printf(void);
/**
* @brief Get reset reason of CPU
*
* @param cpu_no CPU number
* @return Reset reason code (see in soc/reset_reasons.h)
*/
soc_reset_reason_t esp_rom_get_reset_reason(int cpu_no);
/**
* @brief Route peripheral interrupt sources to CPU's interrupt port by matrix
*
* Usually there're 4 steps to use an interrupt:
* 1. Route peripheral interrupt source to CPU. e.g. esp_rom_route_intr_matrix(0, ETS_WIFI_MAC_INTR_SOURCE, ETS_WMAC_INUM)
* 2. Set interrupt handler for CPU
* 3. Enable CPU interrupt
* 4. Enable peripheral interrupt
*
* @param cpu_core The CPU number, which the peripheral interrupt will inform to
* @param periph_intr_id The peripheral interrupt source number
* @param cpu_intr_num The CPU (external) interrupt number. On targets that use CLIC as their interrupt controller,
* this number represents the external interrupt number. For example, passing `cpu_intr_num = i`
* to this function would in fact bind peripheral source to CPU interrupt `CLIC_EXT_INTR_NUM_OFFSET + i`.
*/
void esp_rom_route_intr_matrix(int cpu_core, uint32_t periph_intr_id, uint32_t cpu_intr_num);
/**
* @brief Get the real CPU ticks per us
*
* @return CPU ticks per us
*/
uint32_t esp_rom_get_cpu_ticks_per_us(void);
/**
* @brief Set the real CPU tick rate
*
* @note Call this function when CPU frequency is changed, otherwise the `esp_rom_delay_us` can be inaccurate.
*
* @param ticks_per_us CPU ticks per us
*/
void esp_rom_set_cpu_ticks_per_us(uint32_t ticks_per_us);
#ifdef __cplusplus
}
#endif