feat(vfs): Modify for esp8266

components/esp8266/driver/uart.c

@@ -33,6 +33,7 @@
 #include "rom/ets_sys.h"
 
 #include "driver/uart.h"
+#include "driver/uart_select.h"
 
 #define portYIELD_FROM_ISR() taskYIELD()
 
@@ -88,6 +89,7 @@ typedef struct {
     uint32_t tx_len_tot;                /*!< Total length of current item in ring buffer*/
     uint32_t tx_len_cur;
     bool wait_tx_done_flg;
+    uart_select_notif_callback_t uart_select_notif_callback; /*!< Notification about select() events */
 } uart_obj_t;
 
 static uart_obj_t *p_uart_obj[UART_NUM_MAX] = {0};
@@ -502,6 +504,7 @@ static void uart_rx_intr_handler_default(void *param)
     BaseType_t task_woken = 0;
 
     while (uart_intr_status != 0x0) {
+        uart_select_notif_t notify = UART_SELECT_ERROR_NOTIF;
 
         buf_idx = 0;
         uart_event.type = UART_EVENT_MAX;
@@ -628,6 +631,8 @@ static void uart_rx_intr_handler_default(void *param)
                     p_uart->rx_buffered_len += p_uart->rx_stash_len;
                 }
 
+                notify = UART_SELECT_READ_NOTIF;
+
                 if (task_woken == pdTRUE) {
                     portYIELD_FROM_ISR();
                 }
@@ -640,17 +645,32 @@ static void uart_rx_intr_handler_default(void *param)
             uart_reset_rx_fifo(uart_num);
             uart_reg->int_clr.rxfifo_ovf = 1;
             uart_event.type = UART_FIFO_OVF;
+            notify = UART_SELECT_ERROR_NOTIF;
         } else if (uart_intr_status & UART_FRM_ERR_INT_ST_M) {
             uart_reg->int_clr.frm_err = 1;
             uart_event.type = UART_FRAME_ERR;
+            notify = UART_SELECT_ERROR_NOTIF;
         } else if (uart_intr_status & UART_PARITY_ERR_INT_ST_M) {
             uart_reg->int_clr.parity_err = 1;
             uart_event.type = UART_PARITY_ERR;
+            notify = UART_SELECT_ERROR_NOTIF;
         } else {
             uart_reg->int_clr.val = uart_intr_status; // simply clear all other intr status
             uart_event.type = UART_EVENT_MAX;
+            notify = UART_SELECT_ERROR_NOTIF;
         }
 
+#ifdef CONFIG_USING_ESP_VFS
+        if (uart_event.type != UART_EVENT_MAX && p_uart->uart_select_notif_callback) {
+            p_uart->uart_select_notif_callback(uart_num, notify, &task_woken);
+            if (task_woken == pdTRUE) {
+                portYIELD_FROM_ISR();
+            }
+        }
+#else
+        (void)notify;
+#endif
+
         if (uart_event.type != UART_EVENT_MAX && p_uart->xQueueUart) {
             if (pdFALSE == xQueueSendFromISR(p_uart->xQueueUart, (void *)&uart_event, &task_woken)) {
                 ESP_EARLY_LOGV(UART_TAG, "UART event queue full");
@@ -950,6 +970,8 @@ esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_b
             p_uart_obj[uart_num]->tx_ring_buf = NULL;
             p_uart_obj[uart_num]->tx_buf_size = 0;
         }
+
+        p_uart_obj[uart_num]->uart_select_notif_callback = NULL;
     } else {
         ESP_LOGE(UART_TAG, "UART driver already installed");
         return ESP_FAIL;
@@ -1039,6 +1061,13 @@ esp_err_t uart_driver_delete(uart_port_t uart_num)
     return ESP_OK;
 }
 
+void uart_set_select_notif_callback(uart_port_t uart_num, uart_select_notif_callback_t uart_select_notif_callback)
+{
+    if (uart_num < UART_NUM_MAX && p_uart_obj[uart_num]) {
+        p_uart_obj[uart_num]->uart_select_notif_callback = (uart_select_notif_callback_t) uart_select_notif_callback;
+    }
+}
+
 esp_err_t uart_set_rx_timeout(uart_port_t uart_num, const uint8_t tout_thresh)
 {
     UART_CHECK((uart_num < UART_NUM_MAX), "uart_num error", ESP_ERR_INVALID_ARG);

components/esp8266/include/driver/uart_select.h

@@ -40,7 +40,7 @@ void uart_set_select_notif_callback(uart_port_t uart_num, uart_select_notif_call
 /**
  * @brief Get mutex guarding select() notifications
  */
-portMUX_TYPE *uart_get_selectlock();
+void *uart_get_selectlock();
 
 #ifdef __cplusplus
 }

components/lwip/apps/multi-threads/sockets_mt.c

@@ -60,7 +60,6 @@
 #define lwip_select       lwip_select_esp
 #define lwip_ioctlsocket  lwip_ioctl_esp
 
-#if LWIP_POSIX_SOCKETS_IO_NAMES
 #undef lwip_read
 #undef lwip_write
 #undef lwip_writev
@@ -75,7 +74,6 @@
 #define lwip_close        lwip_close_esp
 #define lwip_fcntl        lwip_fcntl_esp
 #define lwip_ioctl        lwip_ioctl_esp
-#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */
 
 #include "../../lwip/src/api/sockets.c"
 
@@ -100,7 +98,6 @@
 #undef lwip_select
 #undef lwip_ioctlsocket
 
-#if LWIP_POSIX_SOCKETS_IO_NAMES
 #undef lwip_read
 #undef lwip_write
 #undef lwip_writev
@@ -108,7 +105,6 @@
 #undef closesocket
 #undef lwip_fcntl
 #undef lwip_ioctl
-#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */
 
 /********************************************************************/
 #define LWIP_SYNC_MT_SLEEP_MS 10

components/lwip/component.mk

@@ -20,6 +20,10 @@ COMPONENT_SRCDIRS += apps/dhcpserver \
                      port/esp8266/freertos \
                      port/esp8266/netif
 
+ifdef CONFIG_USING_ESP_VFS
+COMPONENT_SRCDIRS += port
+endif
+
 CFLAGS += -Wno-address #lots of LWIP source files evaluate macros that check address of stack variables
 
 lwip/src/apps/sntp/sntp.o: CFLAGS += -Wno-implicit-function-declaration

components/lwip/lwip/src/core/init.c

@@ -347,6 +347,11 @@ lwip_init(void)
 
   /* Modules initialization */
   stats_init();
+
+#ifdef CONFIG_USING_ESP_VFS
+  esp_vfs_lwip_sockets_register();
+#endif
+
 #if !NO_SYS
   sys_init();
 #endif /* !NO_SYS */

components/lwip/lwip/src/include/lwip/sockets.h

@@ -448,7 +448,9 @@ typedef struct fd_set
 } fd_set;
 
 #elif LWIP_SOCKET_OFFSET
+#ifndef CONFIG_USING_ESP_VFS
 #error LWIP_SOCKET_OFFSET does not work with external FD_SET!
+#endif
 #elif FD_SETSIZE < MEMP_NUM_NETCONN
 #error "external FD_SETSIZE too small for number of sockets"
 #endif /* FD_SET */

components/lwip/lwip/src/include/lwip/sys.h

@@ -179,6 +179,14 @@ err_t sys_sem_new(sys_sem_t *sem, u8_t count);
  * @param sem the semaphore to signal
  */
 void sys_sem_signal(sys_sem_t *sem);
+
+#if ESP_LWIP
+/** Signals a semaphore (ISR version)
+ * @param sem the semaphore to signal
+ * @return non-zero if a higher priority task has been woken  */
+int sys_sem_signal_isr(sys_sem_t *sem);
+#endif
+
 /**
  * @ingroup sys_sem
  * Wait for a semaphore for the specified timeout

components/lwip/lwip/src/include/posix/sys/socket.h

@@ -30,4 +30,11 @@
  *
  */
 
+#include "sdkconfig.h"
+
 #include "lwip/sockets.h"
+
+#ifdef CONFIG_USING_ESP_VFS
+#include <unistd.h>
+#include <fcntl.h>
+#endif

components/lwip/port/esp8266/freertos/sys_arch.c

@@ -109,6 +109,14 @@ sys_sem_signal(sys_sem_t *sem)
     xSemaphoreGive(*sem);
 }
 
+/*-----------------------------------------------------------------------------------*/
+// Signals a semaphore (from ISR)
+int sys_sem_signal_isr(sys_sem_t *sem)
+{
+    BaseType_t woken = pdFALSE;
+    xSemaphoreGiveFromISR(*sem, &woken);
+    return woken == pdTRUE;
+}
 
 /*-----------------------------------------------------------------------------------*/
 /*

components/lwip/port/esp8266/include/arch/sys_arch.h

@@ -37,6 +37,7 @@
 #include "freertos/task.h"
 #include "freertos/queue.h"
 #include "freertos/semphr.h"
+#include "arch/vfs_lwip.h"
 
 typedef xSemaphoreHandle sys_sem_t;
 typedef xSemaphoreHandle sys_mutex_t;

components/lwip/port/esp8266/include/lwipopts.h

@@ -1412,7 +1412,11 @@ size_t memp_malloc_get_size(size_t type);
  * Disable this option if you use a POSIX operating system that uses the same
  * names (read, write & close). (only used if you use sockets.c)
  */
+#ifdef CONFIG_USING_ESP_VFS
+#define LWIP_POSIX_SOCKETS_IO_NAMES     0
+#else
 #define LWIP_POSIX_SOCKETS_IO_NAMES     1
+#endif
 
 /**
  * LWIP_SOCKET_OFFSET==n: Increases the file descriptor number created by LwIP with n.
@@ -1421,7 +1425,7 @@ size_t memp_malloc_get_size(size_t type);
  * re implement read/write/close/ioctl/fnctl to send the requested action to the right
  * library (sharing select will need more work though).
  */
-#define LWIP_SOCKET_OFFSET              0
+#define LWIP_SOCKET_OFFSET              (FD_SETSIZE - CONFIG_LWIP_MAX_SOCKETS)
 
 /**
  * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT

components/lwip/port/vfs_lwip.c

@@ -21,7 +21,7 @@
 #include "esp_vfs.h"
 #include "esp_vfs_dev.h"
 #include "esp_attr.h"
-#include "soc/uart_struct.h"
+#include "esp8266/uart_struct.h"
 #include "lwip/sockets.h"
 #include "sdkconfig.h"
 #include "lwip/sys.h"
@@ -42,23 +42,23 @@ static void lwip_stop_socket_select_isr(BaseType_t *woken)
 
 static int lwip_fcntl_r_wrapper(int fd, int cmd, va_list args)
 {
-    return lwip_fcntl_r(fd, cmd, va_arg(args, int));
+    return lwip_fcntl(fd, cmd, va_arg(args, int));
 }
 
 static int lwip_ioctl_r_wrapper(int fd, int cmd, va_list args)
 {
-    return lwip_ioctl_r(fd, cmd, va_arg(args, void *));
+    return lwip_ioctl(fd, cmd, va_arg(args, void *));
 }
 
 void esp_vfs_lwip_sockets_register()
 {
     esp_vfs_t vfs = {
         .flags = ESP_VFS_FLAG_DEFAULT,
-        .write = &lwip_write_r,
+        .write = &lwip_write,
         .open = NULL,
         .fstat = NULL,
-        .close = &lwip_close_r,
+        .close = &lwip_close,
-        .read = &lwip_read_r,
+        .read = &lwip_read,
         .fcntl = &lwip_fcntl_r_wrapper,
         .ioctl = &lwip_ioctl_r_wrapper,
         .socket_select = &lwip_select,

components/newlib/newlib/include/fcntl.h

@@ -1,3 +1,6 @@
+
+#pragma once
+
 #include <sys/socket.h>
 #undef fcntl
 

components/newlib/newlib/include/sys/dirent.h

@@ -1,13 +0,0 @@
-/* <dirent.h> includes <sys/dirent.h>, which is this file.  On a
-   system which supports <dirent.h>, this file is overridden by
-   dirent.h in the libc/sys/.../sys directory.  On a system which does
-   not support <dirent.h>, we will get this file which uses #error to force
-   an error.  */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-//#error "<dirent.h> not supported"
-#ifdef __cplusplus
-}
-#endif

components/newlib/newlib/port/esp_newlib.c

@@ -12,11 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include "sdkconfig.h"
 #include <reent.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#ifdef CONFIG_USING_ESP_VFS
+#include "esp_vfs_dev.h"
+#endif
 
 /*
  * @brief Initialize global and thread's private reent object data. We add this instead of
@@ -47,15 +51,19 @@ int esp_newlib_init(void)
 {
     esp_reent_init(_global_impure_ptr);
 
-    _GLOBAL_REENT->_stdout = fopen("uart/0", "w");
+#ifdef CONFIG_USING_ESP_VFS
+    esp_vfs_dev_uart_register();
+#endif
+
+    _GLOBAL_REENT->_stdout = fopen("/dev/uart/0", "w");
     if (!_GLOBAL_REENT->_stdout)
         goto err;
 
-    _GLOBAL_REENT->_stderr = fopen("uart/0", "w");
+    _GLOBAL_REENT->_stderr = fopen("/dev/uart/0", "w");
     if (!_GLOBAL_REENT->_stderr)
         goto err_fail;
 
-    _GLOBAL_REENT->_stdin = fopen("uart/0", "r");
+    _GLOBAL_REENT->_stdin = fopen("/dev/uart/0", "r");
     if (!_GLOBAL_REENT->_stdin)
         goto err_in;
 

components/newlib/newlib/port/include/sys/select.h

@@ -15,6 +15,28 @@
 #ifndef __ESP_SYS_SELECT_H__
 #define __ESP_SYS_SELECT_H__
 
+#include "sdkconfig.h"
+
+#ifdef CONFIG_USING_ESP_VFS
+
+#include <sys/types.h>
+#include <sys/time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#else
+
 #include "lwip/sockets.h"
 
+#endif
+
 #endif //__ESP_SYS_SELECT_H__
+

components/newlib/newlib/port/select.c

@@ -16,6 +16,7 @@
 #include "esp_vfs.h"
 #include "sdkconfig.h"
 
+#ifdef CONFIG_USING_ESP_VFS
 #ifdef CONFIG_USE_ONLY_LWIP_SELECT
 #include "lwip/sockets.h"
 
@@ -62,3 +63,4 @@ int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct
     return esp_vfs_select(nfds, readfds, writefds, errorfds, timeout);
 #endif
 }
+#endif /* CONFIG_USING_ESP_VFS */

components/newlib/newlib/port/syscall.c

@@ -22,6 +22,57 @@
 #include "FreeRTOS.h"
 #include "esp_log.h"
 
+#ifdef CONFIG_USING_ESP_VFS
+
+#include "esp_vfs.h"
+
+int _open_r(struct _reent *r, const char *filename, int flags, int mode)
+{
+    return esp_vfs_open(r, filename, flags, mode);
+}
+
+_ssize_t _read_r(struct _reent *r, int fd, void *buf, size_t len)
+{
+    return esp_vfs_read(r, fd, buf, len);
+}
+
+_ssize_t _write_r(struct _reent *r, int fd, const void *buf, size_t len)
+{
+    return esp_vfs_write(r, fd, buf, len);
+}
+
+_off_t _lseek_r(struct _reent *r, int fd, _off_t where, int whence)
+{
+    return esp_vfs_lseek(r, fd, where, whence);
+}
+
+int _close_r(struct _reent *r, int fd)
+{
+    return esp_vfs_close(r, fd);
+}
+
+int _rename_r(struct _reent *r, const char *from, const char *to)
+{
+    return esp_vfs_rename(r, from, to);
+}
+
+int _unlink_r(struct _reent *r, const char *filename)
+{
+    return esp_vfs_unlink(r, filename);
+}
+
+int _fstat_r(struct _reent *r, int fd, struct stat *s)
+{
+    return esp_vfs_fstat(r, fd, s);
+}
+
+int _stat_r(struct _reent *r, const char *path, struct stat *st)
+{
+    return esp_vfs_stat(r, path, st);
+}
+
+#else
+
 int _open_r(struct _reent *r, const char *filename, int flags, int mode)
 {
     return 0;
@@ -70,11 +121,13 @@ int _fstat_r(struct _reent *r, int fd, struct stat *s)
     return 0;
 }
 
-void *_sbrk_r(struct _reent *r, ptrdiff_t incr)
+int _stat_r(struct _reent *r, const char *path, struct stat *st)
 {
-    return NULL;
+    return 0;
 }
 
+#endif /* CONFIG_USING_ESP_VFS */
+
 void *_malloc_r(struct _reent *r, size_t n)
 {
     void *return_addr = (void *)__builtin_return_address(0);
@@ -103,11 +156,6 @@ void _free_r(struct _reent *r, void *ptr)
     _heap_caps_free(ptr, return_addr, 0);
 }
 
-void _exit(int status)
-{
-    while (1);
-}
-
 void abort(void)
 {
     ESP_LOGE("ABORT","Error found and abort!");
@@ -117,3 +165,13 @@ void abort(void)
         *((int *)NULL) = 0;
     }
 }
+
+void _exit(int status)
+{
+    abort();
+}
+
+void *_sbrk_r(struct _reent *r, ptrdiff_t incr)
+{
+    abort();
+}

components/tcp_transport/transport_tcp.c

@@ -15,7 +15,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "lwip/sockets.h"
+#include <sys/socket.h>
 #include "lwip/dns.h"
 #include "lwip/netdb.h"
 

components/vfs/CMakeLists.txt

@@ -1,3 +1,4 @@
+if(CONFIG_USING_ESP_VFS)
     set(COMPONENT_SRCS "vfs.c"
                        "vfs_uart.c")
     set(COMPONENT_ADD_INCLUDEDIRS "include")
@@ -5,3 +6,4 @@ set(COMPONENT_ADD_INCLUDEDIRS "include")
     set(COMPONENT_REQUIRES)
 
     register_component()
+endif()

components/vfs/Kconfig

@@ -1,8 +1,16 @@
 menu "Virtual file system"
 
+config USING_ESP_VFS
+    bool "Using espressif VFS"
+    default y
+    help
+        Enable this option, espressif  VFS can be used. Users can use APIs like "open", "read", "write"
+        and so on to operate I/O device which is registered.
+
 config SUPPRESS_SELECT_DEBUG_OUTPUT
     bool "Suppress select() related debug outputs"
     default y
+    depends on USING_ESP_VFS
     help
         Select() related functions might produce an unconveniently lot of
         debug outputs when one sets the default log level to DEBUG or higher.
@@ -12,6 +20,7 @@ config SUPPRESS_SELECT_DEBUG_OUTPUT
 config SUPPORT_TERMIOS
     bool "Add support for termios.h"
     default y
+    depends on USING_ESP_VFS
     help
         Disabling this option can save memory when the support for termios.h is not required.
 

components/vfs/component.mk

@@ -3,3 +3,8 @@
 #
 # (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)
 
+ifndef CONFIG_USING_ESP_VFS
+COMPONENT_ADD_INCLUDEDIRS :=
+COMPONENT_SRCDIRS :=
+endif
+

components/vfs/vfs_uart.c

@@ -22,13 +22,23 @@
 #include "esp_vfs.h"
 #include "esp_vfs_dev.h"
 #include "esp_attr.h"
-#include "soc/uart_struct.h"
+#include "esp8266/uart_struct.h"
+#include "driver/uart_select.h"
 #include "driver/uart.h"
 #include "sdkconfig.h"
-#include "driver/uart_select.h"
+
+#ifdef portENTER_CRITICAL
+#undef portENTER_CRITICAL
+#define portENTER_CRITICAL(_lock)   vPortEnterCritical()
+#endif
+
+#ifdef portEXIT_CRITICAL
+#undef portEXIT_CRITICAL
+#define portEXIT_CRITICAL(_lock)    vPortExitCritical()
+#endif
 
 // TODO: make the number of UARTs chip dependent
-#define UART_NUM 3
+#define UART_NUM 2
 
 // Token signifying that no character is available
 #define NONE -1
@@ -47,12 +57,12 @@ static void uart_tx_char_via_driver(int fd, int c);
 static int uart_rx_char_via_driver(int fd);
 
 // Pointers to UART peripherals
-static uart_dev_t* s_uarts[UART_NUM] = {&UART0, &UART1, &UART2};
+static uart_dev_t* s_uarts[UART_NUM] = {&uart0, &uart1};
 // per-UART locks, lazily initialized
 static _lock_t s_uart_read_locks[UART_NUM];
 static _lock_t s_uart_write_locks[UART_NUM];
 // One-character buffer used for newline conversion code, per UART
-static int s_peek_char[UART_NUM] = { NONE, NONE, NONE };
+static int s_peek_char[UART_NUM] = { NONE, NONE };
 // Per-UART non-blocking flag. Note: default implementation does not honor this
 // flag, all reads are non-blocking. This option becomes effective if UART
 // driver is used.
@@ -94,12 +104,12 @@ static void uart_end_select();
 
 // Functions used to write bytes to UART. Default to "basic" functions.
 static tx_func_t s_uart_tx_func[UART_NUM] = {
-        &uart_tx_char, &uart_tx_char, &uart_tx_char
+        &uart_tx_char, &uart_tx_char
 };
 
 // Functions used to read bytes from UART. Default to "basic" functions.
 static rx_func_t s_uart_rx_func[UART_NUM] = {
-        &uart_rx_char, &uart_rx_char, &uart_rx_char
+        &uart_rx_char, &uart_rx_char
 };
 
 

examples/peripherals/uart_select/main/uart_select_example_main.c

@@ -23,14 +23,14 @@ static const char* TAG = "uart_select_example";
 static void uart_select_task()
 {
     uart_config_t uart_config = {
-        .baud_rate = 115200,
+        .baud_rate = 74880,
         .data_bits = UART_DATA_8_BITS,
         .parity    = UART_PARITY_DISABLE,
         .stop_bits = UART_STOP_BITS_1,
         .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
     };
     uart_param_config(UART_NUM_0, &uart_config);
-    uart_driver_install(UART_NUM_0, 2*1024, 0, 0, NULL, 0);
+    uart_driver_install(UART_NUM_0, 2*1024, 0, 0, NULL);
 
     while (1) {
         int fd;

examples/peripherals/uart_select/sdkconfig.defaults

@@ -0,0 +1,4 @@
+CONFIG_USING_ESP_VFS=y
+CONFIG_SUPPRESS_SELECT_DEBUG_OUTPUT=y
+CONFIG_SUPPORT_TERMIOS=y
+