Espressif ESP32-S2 Programming Manual page 790

Chapter 2. API Reference
void (*stop_socket_select)(void *sem)
called by VFS to interrupt the socket_select call when select is activated from a non-socket VFS driver;
set only for the socket driver
void (*stop_socket_select_isr)(void *sem, BaseType_t *woken)
stop_socket_select which can be called from ISR; set only for the socket driver
void *(*get_socket_select_semaphore)(void)
end_select is called to stop the I/O multiplexing and deinitialize the environment created by start_select
for the given VFS
esp_err_t (*end_select)(void *end_select_args)
get_socket_select_semaphore returns semaphore allocated in the socket driver; set only for the socket
driver
Macros
MAX_FDS
Maximum number of (global) file descriptors.
ESP_VFS_PATH_MAX
Maximum length of path prefix (not including zero terminator)
ESP_VFS_FLAG_DEFAULT
Default value of flags member in
ESP_VFS_FLAG_CONTEXT_PTR
Flag which indicates that FS needs extra context pointer in syscalls.
Type Definitions
typedef int esp_vfs_id_t
Header File
• components/vfs/include/esp_vfs_dev.h
Functions
void esp_vfs_dev_uart_register(void)
add /dev/uart virtual filesystem driver
This function is called from startup code to enable serial output
void esp_vfs_dev_uart_set_rx_line_endings(esp_line_endings_t mode)
Set the line endings expected to be received on UART.
This specifies the conversion between line endings received on UART and newlines ('', LF) passed into
stdin:
• ESP_LINE_ENDINGS_CRLF: convert CRLF to LF
• ESP_LINE_ENDINGS_CR: convert CR to LF
• ESP_LINE_ENDINGS_LF: no modification
Note this function is not thread safe w.r.t. reading from UART
Parameters
• mode: line endings expected on UART
void esp_vfs_dev_uart_set_tx_line_endings(esp_line_endings_t mode)
Set the line endings to sent to UART.
This specifies the conversion between newlines ('', LF) on stdout and line endings sent over UART:
• ESP_LINE_ENDINGS_CRLF: convert LF to CRLF
• ESP_LINE_ENDINGS_CR: convert LF to CR
• ESP_LINE_ENDINGS_LF: no modification
Espressif Systems
esp_vfs_t structure.
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