Add ESP8266 RTOS example

PUBLISHED_FROM=892d01b09f5801d3d19e6db1ce22b7916d2f83d5

examples/ESP8266_RTOS/user/Makefile

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+
+#############################################################
+# Required variables for each makefile
+# Discard this section from all parent makefiles
+# Expected variables (with automatic defaults):
+#   CSRCS (all "C" files in the dir)
+#   SUBDIRS (all subdirs with a Makefile)
+#   GEN_LIBS - list of libs to be generated ()
+#   GEN_IMAGES - list of images to be generated ()
+#   COMPONENTS_xxx - a list of libs/objs in the form
+#     subdir/lib to be extracted and rolled up into
+#     a generated lib/image xxx.a ()
+#
+ifndef PDIR
+GEN_LIBS = libuser.a
+endif
+
+
+#############################################################
+# Configuration i.e. compile options etc.
+# Target specific stuff (defines etc.) goes in here!
+# Generally values applying to a tree are captured in the
+#   makefile at its root level - these are then overridden
+#   for a subtree within the makefile rooted therein
+#
+DEFINES += -DMG_DISABLE_DAV -DMG_DISABLE_SYNC_RESOLVER -DMG_DISABLE_CGI \
+           -DMG_DISABLE_SOCKETPAIR -DMG_DISABLE_DIRECTORY_LISTING \
+           -DMG_MAX_HTTP_HEADERS=20 -DMG_MAX_HTTP_REQUEST_SIZE=1024 \
+           -DMG_MAX_PATH=40 -DMG_MAX_HTTP_SEND_IOBUF=1024 \
+           -DMG_ESP8266 -DRTOS_SDK -DMG_LWIP
+
+#############################################################
+# Recursion Magic - Don't touch this!!
+#
+# Each subtree potentially has an include directory
+#   corresponding to the common APIs applicable to modules
+#   rooted at that subtree. Accordingly, the INCLUDE PATH
+#   of a module can only contain the include directories up
+#   its parent path, and not its siblings
+#
+# Required for each makefile to inherit from the parent
+#
+
+INCLUDES += -I ./
+PDIR := ../$(PDIR)
+sinclude $(PDIR)Makefile
+

examples/ESP8266_RTOS/user/esp_libc.c

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+/*
+* Copyright (c) 2015 Cesanta Software Limited
+* All rights reserved
+*/
+
+#include <ctype.h>
+#include <sys/time.h>
+#include <stdint.h>
+
+#include <math.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "esp_common.h"
+
+/* Makes fprintf(stdout) and stderr work. */
+_ssize_t _write_r(struct _reent *r, int fd, void *buf, size_t len) {
+  if (fd == 1 || fd == 2) {
+    size_t i;
+    for (i = 0; i < len; i++) {
+      os_putc(((char *) buf)[i]);
+    }
+    return len;
+  }
+  return -1;
+}
+
+/*
+ * You'll need to implement _open_r and friends if you want file operations. See
+ * https://github.com/cesanta/smart.js/blob/master/platforms/esp8266/user/esp_fs.c
+ * for SPIFFS-based implementation.
+ */
+
+void abort(void) __attribute__((no_instrument_function));
+void abort(void) {
+  /* cause an unaligned access exception, that will drop you into gdb */
+  *(int *) 1 = 1;
+  while (1)
+    ; /* avoid gcc warning because stdlib abort() has noreturn attribute */
+}
+
+void _exit(int status) {
+  printf("_exit(%d)\n", status);
+  abort();
+}
+
+int _gettimeofday_r(struct _reent *r, struct timeval *tp, void *tzp) {
+  uint32_t time = system_get_time();
+  tp->tv_sec = time / 1000000;
+  tp->tv_usec = time % 1000000;
+  return 0;
+}

examples/ESP8266_RTOS/user/mongoose.c

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+../../../mongoose.c

examples/ESP8266_RTOS/user/mongoose.h

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+../../../mongoose.h

examples/ESP8266_RTOS/user/user_main.c

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+/*
+ * Copyright (c) 2015 Cesanta Software Limited
+ * All rights reserved
+ */
+
+#include "esp_common.h"
+
+#include "mongoose.h"
+
+#define AP_SSID "Mongoose"
+#define AP_PASS "Mongoose"
+#define AP_CHAN 9
+#define MG_LISTEN_ADDR "80"
+
+#define MG_TASK_STACK_SIZE 2048
+#define MG_TASK_PRIORITY 1
+
+void uart_div_modify(int uart_no, unsigned int freq);
+
+void ev_handler(struct mg_connection *nc, int ev, void *p) {
+  static const char *reply_fmt =
+      "HTTP/1.0 200 OK\r\n"
+      "Connection: close\r\n"
+      "Content-Type: text/plain\r\n"
+      "\r\n"
+      "Hello %s\n";
+  LOG(LL_DEBUG, ("conn %p ev %d", nc, ev));
+
+  switch (ev) {
+    case MG_EV_ACCEPT: {
+      char addr[32];
+      mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
+                          MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
+      LOG(LL_INFO, ("Connection %p from %s", nc, addr));
+      break;
+    }
+    case MG_EV_HTTP_REQUEST: {
+      char addr[32];
+      struct http_message *hm = (struct http_message *) p;
+      mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
+                          MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
+      LOG(LL_INFO,
+          ("HTTP request from %s: %.*s %.*s", addr, (int) hm->method.len,
+           hm->method.p, (int) hm->uri.len, hm->uri.p));
+      mg_printf(nc, reply_fmt, addr);
+      nc->flags |= MG_F_SEND_AND_CLOSE;
+      break;
+    }
+    case MG_EV_CLOSE: {
+      LOG(LL_INFO, ("Connection %p closed", nc));
+      break;
+    }
+  }
+}
+
+void setup_ap() {
+  struct softap_config cfg;
+
+  wifi_set_opmode_current(SOFTAP_MODE);
+  memset(&cfg, 0, sizeof(cfg));
+  strcpy((char *) cfg.ssid, AP_SSID);
+  strcpy((char *) cfg.password, AP_PASS);
+  cfg.ssid_len = strlen((const char *) cfg.ssid);
+  cfg.authmode =
+      strlen((const char *) cfg.password) ? AUTH_WPA2_PSK : AUTH_OPEN;
+  cfg.channel = AP_CHAN;
+  cfg.ssid_hidden = 0;
+  cfg.max_connection = 10;
+  cfg.beacon_interval = 100; /* ms */
+
+  LOG(LL_INFO, ("Setting up AP '%s' on channel %d", cfg.ssid, cfg.channel));
+  wifi_softap_set_config_current(&cfg);
+}
+
+static void mg_task(void *arg) {
+  struct mg_mgr mgr;
+  struct mg_connection *nc;
+
+  cs_log_set_level(LL_INFO);
+
+  LOG(LL_INFO, ("SDK version: %s", system_get_sdk_version()));
+  setup_ap();
+
+  mg_mgr_init(&mgr, NULL);
+
+  nc = mg_bind(&mgr, MG_LISTEN_ADDR, ev_handler);
+  if (nc == NULL) {
+    LOG(LL_ERROR, ("Error setting up listener!"));
+    return;
+  }
+  mg_set_protocol_http_websocket(nc);
+
+  while (1) {
+    mg_mgr_poll(&mgr, 1000);
+  }
+}
+
+xTaskHandle s_mg_task_handle;
+
+void user_init(void) {
+  uart_div_modify(0, UART_CLK_FREQ / 115200);
+
+  setvbuf(stdout, NULL, _IONBF, 0);
+  setvbuf(stderr, NULL, _IONBF, 0);
+
+  xTaskCreate(mg_task, (const signed char *) "mongoose", MG_TASK_STACK_SIZE,
+              NULL, MG_TASK_PRIORITY, &s_mg_task_handle);
+}