Add RP examples

tutorials/pico-sdk/pico-rmii/Makefile

@@ -1,20 +1,41 @@
+# Environment setup: https://mongoose.ws/docs/getting-started/build-environment/
+
+CWD ?= $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+SDK_PATH ?= $(CWD)/pico-sdk
 RM = rm -rf
 MKBUILD = test -d build || mkdir build
+
 ifeq ($(OS),Windows_NT)
   RM = cmd /C del /Q /F /S
   MKBUILD = if not exist build mkdir build
 endif
 
-all example:
-	true
+.PHONY: build
 
-build: pico-sdk
+all build: build/firmware.uf2
+
+build/firmware.uf2: pico_sdk_import.cmake mongoose.c mongoose.h
+
+pico_sdk_import.cmake: $(SDK_PATH)
+	cp $(SDK_PATH)/external/$@ $@
+
+mongoose.c mongoose.h:
+	cp ../../../$@ .
+
+build/firmware.uf2: $(SDK_PATH) $(wildcard *.[ch]) CMakeLists.txt Makefile
 	$(MKBUILD)
-	cd build && cmake -G "Unix Makefiles" .. && make
+	cd build && PICO_SDK_PATH=$(SDK_PATH) cmake -G "Unix Makefiles" .. && make
 
-pico-sdk:
-	git clone --depth 1 -b 2.1.0 https://github.com/raspberrypi/pico-sdk $@
-	cd $@ && git submodule update --init
+flash: build/firmware.uf2
+	picotool load $< -f
 
 clean:
-	$(RM) pico-sdk build
+	$(RM) build pico_sdk_import.cmake mongoose.c mongoose.h
+
+fullclean: clean
+	$(RM) $(SDK_PATH)
+
+$(SDK_PATH):
+	git clone -c advice.detachedHead=false --quiet --depth 1 -b 2.1.1 https://github.com/raspberrypi/pico-sdk $@
+	cd $@ && git submodule update --quiet --init
+

tutorials/pico-sdk/pico-rmii/main.c

@@ -3,30 +3,12 @@
 
 #include "pico/stdlib.h"
 #include "hardware/clocks.h"
-
-#include "mongoose.h"
-
 #include "driver_rp2040_rmii.h"
+#include "mongoose.h"
 
 #define CLKREFPIN 20  // either 20 or 22
 
-static void fn(struct mg_connection *c, int ev, void *ev_data) {
-  if (ev == MG_EV_HTTP_MSG) {
-    mg_http_reply(c, 200, "", "ok\n");
-  }
-}
-
-
-int main(void) {
-  // use the RMII reference clock (50MHz) as our system clock
-  clock_configure_gpin(clk_sys, CLKREFPIN, 50 * MHZ, 50 * MHZ);
-  sleep_ms(100);
-  stdio_init_all();
-
-  struct mg_mgr mgr;        // Initialise Mongoose event manager
-  mg_mgr_init(&mgr);        // and attach it to the interface
-  mg_log_set(MG_LL_DEBUG);  // Set log level
-
+static void driver_init(struct mg_mgr *mgr) {
   MG_INFO(("Init TCP/IP"));
   // Initialise Mongoose network stack and specific driver
   // Set consecutive GPIOs for RMII (tx and rx) and SMI function groups
@@ -47,11 +29,39 @@ int main(void) {
       .driver = &mg_tcpip_driver_rp2040_rmii,
       .driver_data = &driver_data,
   };
-  mg_tcpip_init(&mgr, &mif);
-  mg_http_listen(&mgr, "http://0.0.0.0", fn, NULL);  // HTTP listener
-  MG_INFO(("Init done, starting main loop"));
+  mg_tcpip_init(mgr, &mif);
+}
 
-  for (;;) mg_mgr_poll(&mgr, 0);  // Infinite event loop
+static void http_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_HTTP_MSG) {  // New HTTP request received
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    uint64_t tick = to_ms_since_boot(get_absolute_time());
+    if (mg_match(hm->uri, mg_str("/api/tick"), NULL)) {
+      mg_http_reply(c, 200, "", "{%m:%llu}\n", MG_ESC("tick"), tick);
+    } else {
+      mg_http_reply(c, 200, "", "Hi from Mongoose, tick %llu\n", tick);
+    }
+  }
+}
 
+// In an RTOS environment, give this task 8 KB of stack space.
+static void run_mongoose(void) {
+  struct mg_mgr mgr;
+  mg_mgr_init(&mgr);
+  driver_init(&mgr);
+  mg_log_set(MG_LL_DEBUG);  // Set log level
+  MG_INFO(("Hardware initialised, starting firmware..."));
+  mg_http_listen(&mgr, "http://0.0.0.0", http_ev_handler, NULL);
+  for (;;) {
+    mg_mgr_poll(&mgr, 1);
+  }
+}
+
+int main(void) {
+  // use the RMII reference clock (50MHz) as our system clock
+  clock_configure_gpin(clk_sys, CLKREFPIN, 50 * MHZ, 50 * MHZ);
+  sleep_ms(100);
+  stdio_init_all();
+  run_mongoose();
   return 0;
 }

tutorials/pico-sdk/pico-rmii/mongoose.c

@@ -1 +0,0 @@
-../../../mongoose.c

tutorials/pico-sdk/pico-rmii/mongoose.h

@@ -1 +0,0 @@
-../../../mongoose.h