VFS_CTX_DEFAULT_VAL macro
Syntax
#define VFS_CTX_DEFAULT_VAL(uart_dev) (uart_vfs_context_t) {\
.uart = (uart_dev),\
.peek_char = NONE,\
.tx_mode = DEFAULT_TX_MODE,\
.rx_mode = DEFAULT_RX_MODE,\
.tx_func = uart_tx_char,\
.rx_func = uart_rx_char,\
.get_avail_data_len_func = uart_get_avail_data_len,\
}