Diff: main.cpp
- Revision:
- 40:17cd01e5f1fa
- Parent:
- 31:11e00e0c285d
- Child:
- 42:cddcdf68386d
--- a/main.cpp Wed Mar 21 07:03:43 2018 +0100
+++ b/main.cpp Mon May 07 09:51:15 2018 +0200
@@ -17,215 +17,142 @@
// ----------------------------------------------------------------------------
#include "mbed.h"
-#include "mbed-trace/mbed_trace.h"
-#include "mbed-trace-helper.h"
#include "simple-mbed-cloud-client.h"
-#include "key-config-manager/kcm_status.h"
-#include "key-config-manager/key_config_manager.h"
#include "SDBlockDevice.h"
#include "FATFileSystem.h"
-//#include "EthernetInterface.h"
#include "SpwfSAInterface.h"
-#define LED_OFF 1
-#define LED_RED NC // betzw: `LED1` conflicts with SPI clock, maybe better use `NC`
+// An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
+// This is great because things such as network operations are illegal in ISR, so updating a resource in a button's fall() function is not allowed
+EventQueue eventQueue;
-DigitalOut led(LED_RED, LED_OFF);
-InterruptIn button(BUTTON1);
+// Instanziate Wi-Fi device
+SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
-// EthernetInterface net;
-SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
+// Storage implementation definition, currently using SDBlockDevice (SPI flash, DataFlash, and internal flash are also available)
SDBlockDevice sd(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS);
-FATFileSystem fs("sd");
+FATFileSystem fs("sd", &sd);
-// Pointers to the resources that will be created in main_application().
-static MbedCloudClientResource* pattern_ptr;
-
-// Pointer to mbedClient, used for calling close function.
-static SimpleMbedCloudClient *client;
-
-static bool button_pressed = false;
+// Declaring pointers for access to Mbed Cloud Client resources outside of main()
+MbedCloudClientResource *button_res;
+MbedCloudClientResource *pattern_res;
-void button_press() {
- button_pressed = true;
-}
+// This function gets triggered by the timer. It's easy to replace it by an InterruptIn and fall() mode on a real button
+void fake_button_press() {
+ int v = button_res->get_value_int() + 1;
-void pattern_updated(const char *) {
- printf("PUT received, new value: %s\n", pattern_ptr->get_value().c_str());
- // Placeholder for PUT action
+ button_res->set_value(v);
+
+ printf("Simulated button clicked %d times\n", v);
}
-void blink_callback(void *) {
- String pattern_str = pattern_ptr->get_value();
- const char *pattern = pattern_str.c_str();
- printf("POST received. LED pattern = %s\n", pattern);
- // Placeholder for POST action
- // The pattern is something like 500:200:500, so parse that.
- // LED blinking is done while parsing.
- led = !led;
- while (*pattern != '\0') {
- // Wait for requested time.
- wait_ms(atoi(pattern));
- led = !led;
- // Search for next value.
- pattern = strchr(pattern, ':');
- if(!pattern) {
- break; // while
- }
- pattern++;
- }
-
- led = LED_OFF;
+/**
+ * PUT handler
+ * @param resource The resource that triggered the callback
+ * @param newValue Updated value for the resource
+ */
+void pattern_updated(MbedCloudClientResource *resource, m2m::String newValue) {
+ printf("PUT received, new value: %s\n", newValue.c_str());
}
-void button_notification_status_callback(const M2MBase& object, const NoticationDeliveryStatus status)
-{
- switch(status) {
- case NOTIFICATION_STATUS_BUILD_ERROR:
- printf("Notification callback: (%s) error when building CoAP message\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_RESEND_QUEUE_FULL:
- printf("Notification callback: (%s) CoAP resend queue full\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_SENT:
- printf("Notification callback: (%s) Notification sent to server\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_DELIVERED:
- printf("Notification callback: (%s) Notification delivered\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_SEND_FAILED:
- printf("Notification callback: (%s) Notification sending failed\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_SUBSCRIBED:
- printf("Notification callback: (%s) subscribed\n", object.uri_path());
- break;
- case NOTIFICATION_STATUS_UNSUBSCRIBED:
- printf("Notification callback: (%s) subscription removed\n", object.uri_path());
- break;
- default:
- break;
+/**
+ * POST handler
+ * @param resource The resource that triggered the callback
+ * @param buffer If a body was passed to the POST function, this contains the data.
+ * Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
+ * @param size Size of the body
+ */
+void blink_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
+ printf("POST received. Going to blink LED pattern: %s\n", pattern_res->get_value().c_str());
+
+ static DigitalOut augmentedLed(LED1); // LED that is used for blinking the pattern
+
+ // Parse the pattern string, and toggle the LED in that pattern
+ string s = std::string(pattern_res->get_value().c_str());
+ size_t i = 0;
+ size_t pos = s.find(':');
+ while (pos != string::npos) {
+ wait_ms(atoi(s.substr(i, pos - i).c_str()));
+ augmentedLed = !augmentedLed;
+
+ i = ++pos;
+ pos = s.find(':', pos);
+
+ if (pos == string::npos) {
+ wait_ms(atoi(s.substr(i, s.length()).c_str()));
+ augmentedLed = !augmentedLed;
+ }
}
}
-// This function is called when a POST request is received for resource 5000/0/1.
-void unregister_cb(void *)
-{
- printf("Unregister resource executed\n");
- client->close();
-}
-
-// This function is called when a POST request is received for resource 5000/0/2.
-void factory_reset_cb(void *)
-{
- printf("Factory reset resource executed\n");
- client->close();
- kcm_status_e kcm_status = kcm_factory_reset();
- if (kcm_status != KCM_STATUS_SUCCESS) {
- printf("Failed to do factory reset - %d\n", kcm_status);
- } else {
- printf("Factory reset completed. Now restart the device\n");
- }
+/**
+ * Notification callback handler
+ * @param resource The resource that triggered the callback
+ * @param status The delivery status of the notification
+ */
+void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
+ printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status);
}
-int main(void)
-{
- // IOTMORF-1712: DAPLINK starts the previous application during flashing a new binary
- // This is workaround to prevent possible deletion of credentials or storage corruption
- // while replacing the application binary.
- wait(2);
-
- // Misc OS setup
- srand(time(NULL));
+/**
+ * Registration callback handler
+ * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
+ */
+void registered(const ConnectorClientEndpointInfo *endpoint) {
+ printf("Connected to Mbed Cloud. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
+}
- printf("Start Simple Mbed Cloud Client\n");
-
- // Initialize button interrupt
- button.fall(&button_press);
+int main(void) {
+ printf("Starting Simple Mbed Cloud Client example\n");
+ printf("Connecting to the network using Ethernet...\n");
- // Initialize SD card
- int status = sd.init();
- if (status != BD_ERROR_OK) {
- printf("Failed to init SD card\r\n");
+ // Connect to the internet (DHCP is expected to be on)
+ nsapi_error_t status = wifi.connect();
+
+ if (status != 0) {
+ printf("Connecting to the network failed %d!\n", status);
return -1;
}
- // Mount the file system (reformatting on failure)
- status = fs.mount(&sd);
- if (status) {
- printf("Failed to mount FAT file system, reformatting...\r\n");
- status = fs.reformat(&sd);
-
- if (status) {
- printf("Failed to reformat FAT file system\r\n");
- return -1;
- } else {
- printf("Reformat and mount complete\r\n");
- }
- }
-
- printf("Connecting to the network using WiFi...\n");
+ printf("Connected to the network successfully. IP address: %s\n", wifi.get_ip_address());
-// status = wifi.connect();
- status = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, (strlen(MBED_CONF_APP_WIFI_PASSWORD) > 1) ? NSAPI_SECURITY_WPA_WPA2 : NSAPI_SECURITY_NONE);
- if (status) {
- printf("Connection to Network Failed %d!\n", status);
- return -1;
- } else {
- const char *ip_addr = wifi.get_ip_address();
- printf("Connected successfully\n");
- printf("IP address %s\n", ip_addr);
- }
-
- SimpleMbedCloudClient mbedClient(&wifi);
- // Save pointer to mbedClient so that other functions can access it.
- client = &mbedClient;
-
- status = mbedClient.init();
- if (status) {
+ // SimpleMbedCloudClient handles registering over LwM2M to Mbed Cloud
+ SimpleMbedCloudClient client(&wifi, &sd, &fs);
+ int client_status = client.init();
+ if (client_status != 0) {
+ printf("Initializing Mbed Cloud Client failed (%d)\n", client_status);
return -1;
}
- printf("Client initialized\r\n");
-
- // Mbed Cloud Client resource setup
- MbedCloudClientResource *button = mbedClient.create_resource("3200/0/5501", "button_resource");
- button->set_value((char*)"0");
- button->methods(M2MMethod::GET);
- button->observable(true);
- button->attach_notification_callback(button_notification_status_callback);
+ // Creating resources, which can be written or read from the cloud
+ button_res = client.create_resource("3200/0/5501", "button_count");
+ button_res->set_value(0);
+ button_res->methods(M2MMethod::GET);
+ button_res->observable(true);
+ button_res->attach_notification_callback(button_callback);
- MbedCloudClientResource *pattern = mbedClient.create_resource("3201/0/5853", "pattern_resource");
- pattern->set_value((char*)"500:500:500:500");
- pattern->methods(M2MMethod::GET | M2MMethod::PUT);
- pattern->attach_put_callback(pattern_updated);
- pattern_ptr = pattern;
+ pattern_res = client.create_resource("3201/0/5853", "blink_pattern");
+ pattern_res->set_value("500:500:500:500:500:500:500:500");
+ pattern_res->methods(M2MMethod::GET | M2MMethod::PUT);
+ pattern_res->attach_put_callback(pattern_updated);
- MbedCloudClientResource *blink = mbedClient.create_resource("3201/0/5850", "blink_resource");
- blink->methods(M2MMethod::POST);
- blink->attach_post_callback(blink_callback);
+ MbedCloudClientResource *blink_res = client.create_resource("3201/0/5850", "blink_action");
+ blink_res->methods(M2MMethod::POST);
+ blink_res->attach_post_callback(blink_callback);
- MbedCloudClientResource *unregister = mbedClient.create_resource("5000/0/1", "unregister");
- unregister->methods(M2MMethod::POST);
- unregister->attach_post_callback(unregister_cb);
+ printf("Initialized Mbed Cloud Client. Registering...\n");
- MbedCloudClientResource *factoryReset = mbedClient.create_resource("5000/0/2", "factory_reset");
- factoryReset->methods(M2MMethod::POST);
- factoryReset->attach_post_callback(factory_reset_cb);
+ // Callback that fires when registering is complete
+ client.on_registered(®istered);
- mbedClient.register_and_connect();
+ // Register with Mbed Cloud
+ client.register_and_connect();
- // Check if client is registering or registered, if true sleep and repeat.
- while (mbedClient.is_register_called()) {
- static int button_count = 0;
- wait_ms(100);
+ // Placeholder for callback to update local resource when GET comes.
+ // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
+ Ticker timer;
+ timer.attach(eventQueue.event(&fake_button_press), 5.0);
- if (button_pressed) {
- button_pressed = false;
- printf("Button clicked %d times\r\n", ++button_count);
- button->set_value(button_count);
- }
- }
-
- // Client unregistered, exit program.
- return 0;
+ // You can easily run the eventQueue in a separate thread if required
+ eventQueue.dispatch_forever();
}
ST
