Diff: CountdownService.h

Revision:

0:bc6cd13ebbdb

Child:

1:79a62e074c35

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CountdownService.h	Fri Nov 23 08:59:41 2018 +0000
@@ -0,0 +1,55 @@
+/*  code is property of aconno.de */
+
+
+#ifndef COUNTDOWN_SERVICE
+#define COUNTDOWN_SERVICE
+
+#include <stdbool.h>
+#include "mbed.h"
+#include <events/mbed_events.h>
+#include "ble/BLE.h"
+
+
+class CountdownService {
+typedef CountdownService Self;
+public:
+    const static uint16_t UUID_Service = 0xFFFF;
+    const static uint16_t UUID_TimeCharacteristic = 0xFFFF;
+    
+    CountdownService(GattServer &server, Callback<void(uint32_t)> countdown_changed_callback = NULL):
+    server(server),
+    countdownChar(UUID_TimeCharacteristic,0),
+    onCountdownReset(countdown_changed_callback) {
+        
+        GattCharacteristic *charTable[] = {&countdownChar};
+        GattService service(UUID_Service, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+        
+        server.addService(service); 
+        server.onDataWritten(this, &CountdownService::onDataWritten);
+    }
+    
+    
+    void SetCountdown(uint32_t value) {
+        server.write(countdownChar.getValueHandle(), (const uint8_t*)&value, sizeof(uint32_t)); 
+    }
+    uint32_t GetCountdown() {
+        uint16_t len = 4;
+        uint32_t value;
+        uint8_t* buffer = (uint8_t*)&value;
+        server.read(countdownChar.getValueHandle(), buffer, &len);
+        return value;
+    }
+    
+private:
+    void onDataWritten(const GattWriteCallbackParams *params) {
+        if (params->handle == countdownChar.getValueHandle()) {
+            onCountdownReset(GetCountdown());
+        }
+    }
+    
+private:
+    GattServer &server;
+    ReadWriteGattCharacteristic<uint32_t> countdownChar;
+    Callback<void(uint32_t)> onCountdownReset;
+};
+#endif
\ No newline at end of file