Update to latest Zephyr and their Docker repo

examples/zephyr/README.md

@@ -0,0 +1,24 @@
+# Zephyr Project examples
+
+## Building
+
+- Run `make zephyr`, this will clone the Zephyr Project repo or update it if you've already done it before
+- Now you can build the project, follow one of this options: 
+
+### Trying on a simulated board
+
+The default board is an x86 machine that can be simulated with QEMU, and runs inside a _Docker_ container, you only need to have _Docker_ installed. Its Ethernet is also simulated and uses the TUN/TAP interface. 
+You'll need a TUN/TAP interface (default name is _tap0_) on your host machine; follow the instructions [here](https://github.com/cesanta/mongoose/tree/master/examples/mip-tap#linux-setup) to configure your network to provide a suitable networking environment. 
+- Run `make build`. The interface configuration on the simulated machine side is in the file _overlay-e1000.conf_, and defaults to _tap0_. You can change this overlay file adding an `OVERLAY` argument (e.g.: *make build OVERLAY="-DOVERLAY_CONFIG=something"*).
+- Once the build succeeds, run `make run` to run the target. The default _Docker_ configuration is to share _/dev/net/tun_; if this does not work for you, pass the necessary _Docker_ parameters inside `SHARETUN` (e.g.: *make run SHARETUN=something*).
+
+### Using a real board
+
+- Run `make build BOARD=yourboardname` (e.g.: *make build BOARD=nucleo_f746zg*)
+- Once the build succeeds, run `make flash`. The Makefile shares the USB bus with the _Docker_ container, this works well with ST-Link and J-Link devices. If this does not work for you, pass the necessary _Docker_ parameters inside `SHAREUSB` (e.g.: *make flash SHAREUSB=something*)
+- The generated ELF file is at _build/zephyr_
+
+## Cleaning up
+
+- You can run `make clean` to clean up the build files but keep the configuration files, which speeds the next build
+- If you do major changes (like compiling for a different board...), run `make pristine` to clean up everything under the _build_ directory.

examples/zephyr/http-server/Makefile

@@ -1,17 +1,52 @@
-PROJECT_DIR ?= /mnt
-ZEPHYR_DIR ?= /zephyrproject
-BOARD ?= nucleo_f746zg
-DOCKER ?= docker run -v $(realpath $(CURDIR)):/mnt mdashnet/zephyr
+PROJECT_DIR ?= /workdir
+ZEPHYR_DIR ?= zephyrproject
+BOARD ?= qemu_x86
+
+ifeq "$(BOARD)" "qemu_x86"
+OVERLAY ?= -DOVERLAY_CONFIG=overlay-e1000.conf
+else
+OVERLAY ?= 
+endif
+
+SHAREUSB ?= --privileged -v /dev/bus/usb/:/dev/bus/usb
+SHARETUN ?= --cap-add=NET_ADMIN --device /dev/net/tun --net=host
+DOCKER ?= docker run --rm -v $(realpath $(CURDIR)):$(PROJECT_DIR)
+REPO ?= zephyrprojectrtos/ci
+
 
 example:
 	true
 
 build:
-	cp ../../../mongoose.c ../../../mongoose.h src/
-	$(DOCKER) /bin/sh -c 'cd $(ZEPHYR_DIR) && west build -b $(BOARD) -p auto $(PROJECT_DIR)'
+	cp ../../../mongoose.[c,h] src/
+	$(DOCKER) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR)/zephyr && \
+	west build -b $(BOARD) -p auto $(PROJECT_DIR) $(OVERLAY) --build-dir $(PROJECT_DIR)/build'
 
-flash:
-	cd $(ZEPHYR_DIR) && west flash
+run:
+	$(DOCKER) -it $(SHARETUN) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && \
+	west build -t run --build-dir $(PROJECT_DIR)/build'
 
 clean:
-	rm -rf */*/mongoose.*
+	$(DOCKER) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && \
+	west build -t clean --build-dir $(PROJECT_DIR)/build'
+
+pristine:
+	$(DOCKER) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && \
+	west build -t pristine --build-dir $(PROJECT_DIR)/build'
+
+
+flash:
+	$(DOCKER) $(SHAREUSB) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && \
+	west flash --build-dir $(PROJECT_DIR)/build'
+
+debug:
+	$(DOCKER) -it $(SHAREUSB) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && \
+	west debug --build-dir $(PROJECT_DIR)/build'
+
+.PHONY: build flash zephyr clean pristine run
+
+zephyr: 
+ifeq ($(wildcard $(ZEPHYR_DIR)/.*),)
+	$(DOCKER) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR) && west init ./$(ZEPHYR_DIR)'
+endif
+	$(DOCKER) $(REPO) /bin/sh -c 'cd $(PROJECT_DIR)/$(ZEPHYR_DIR) && west update'

examples/zephyr/http-server/README.md

@@ -0,0 +1 @@
+../README.md

examples/zephyr/http-server/prj.conf

@@ -8,6 +8,7 @@ CONFIG_NET_SOCKETS=y
 CONFIG_NET_SOCKETS_POLL_MAX=32
 CONFIG_POSIX_MAX_FDS=32
 CONFIG_NET_CONFIG_SETTINGS=y
+CONFIG_NET_CONNECTION_MANAGER=y
 CONFIG_NET_LOG=y
 
 CONFIG_LOG=y

examples/zephyr/http-server/src/main.c

@@ -39,7 +39,7 @@ static void wcb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
       mg_http_serve_dir(c, hm, &opts);                           // static files
     }
   } else if (ev == MG_EV_OPEN) {
-    c->is_hexdumping = 1;
+    // c->is_hexdumping = 1;
   }
 }
 
@@ -68,7 +68,23 @@ static void timer_fn(void *arg) {
   if (s_boot_timestamp < 9999) mg_sntp_request(s_sntp_conn);
 }
 
+// Zephyr: Define a semaphore and network management callback to be able to wait
+// until our IP address is ready. The main function will start and block on this
+// semaphore until this event handler releases it when the network is ready
+K_SEM_DEFINE(run, 0, 1);
+
+static void zeh(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
+                struct net_if *iface) {
+  if (mgmt_event == NET_EVENT_L4_CONNECTED) k_sem_give(&run);
+}
+
 int main(int argc, char *argv[]) {
+  // Zephyr: Register the network management callback and block on the semaphore
+  struct net_mgmt_event_callback ncb;
+  net_mgmt_init_event_callback(&ncb, zeh, NET_EVENT_L4_CONNECTED);
+  net_mgmt_add_event_callback(&ncb);
+  k_sem_take(&run, K_FOREVER);
+
   struct mg_mgr mgr;
 
   mg_log_set(MG_LL_DEBUG);