内部 API 和不稳定的 API
该文档列举了一些 API，这些 API 供内部使用或可能在 ESP-IDF 后续版本中被更改或删除。
API 参考
Header File
This header file can be included with:
#include "esp_rom_sys.h"
Functions
-
void esp_rom_software_reset_system(void)
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_cpu(int cpu_no)
Software Reset cpu core.
It is not recommended to use this function in esp-idf, use esp_restart() instead.
- 参数
cpu_no -- : The CPU to reset, 0 for PRO CPU, 1 for APP CPU.
-
int esp_rom_printf(const char *fmt, ...)
Print formated string to console device.
备注
float and long long data are not supported!
- 参数
fmt -- Format string
... -- Additional arguments, depending on the format string
- 返回
int: Total number of characters written on success; A negative number on failure.
-
void esp_rom_delay_us(uint32_t us)
Pauses execution for us microseconds.
- 参数
us -- Number of microseconds to pause
-
void esp_rom_install_channel_putc(int channel, void (*putc)(char c))
esp_rom_printf can print message to different channels simultaneously. This function can help install the low level putc function for esp_rom_printf.
- 参数
channel -- Channel number (startting from 1)
putc -- Function pointer to the putc implementation. Set NULL can disconnect esp_rom_printf with putc.
-
void esp_rom_install_uart_printf(void)
Install UART1 as the default console channel, equivalent to
esp_rom_install_channel_putc(1, esp_rom_output_putc)
-
soc_reset_reason_t esp_rom_get_reset_reason(int cpu_no)
Get reset reason of CPU.
- 参数
cpu_no -- CPU number
- 返回
Reset reason code (see in soc/reset_reasons.h)
-
void esp_rom_route_intr_matrix(int cpu_core, uint32_t periph_intr_id, uint32_t cpu_intr_num)
Route peripheral interrupt sources to CPU's interrupt port by matrix.
Usually there're 4 steps to use an interrupt:
Route peripheral interrupt source to CPU. e.g. esp_rom_route_intr_matrix(0, ETS_WIFI_MAC_INTR_SOURCE, ETS_WMAC_INUM)
Set interrupt handler for CPU
Enable CPU interrupt
Enable peripheral interrupt
- 参数
cpu_core -- The CPU number, which the peripheral interrupt will inform to
periph_intr_id -- The peripheral interrupt source number
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 = ito this function would in fact bind peripheral source to CPU interruptCLIC_EXT_INTR_NUM_OFFSET + i.
-
uint32_t esp_rom_get_cpu_ticks_per_us(void)
Get the real CPU ticks per us.
- 返回
CPU ticks per us
-
void esp_rom_set_cpu_ticks_per_us(uint32_t ticks_per_us)
Set the real CPU tick rate.
备注
Call this function when CPU frequency is changed, otherwise the
esp_rom_delay_uscan be inaccurate.- 参数
ticks_per_us -- CPU ticks per us