BTLE example for a CJMCU-8223 (NRF51822+Lis3dh). Also includes an OLED display. Further details on ioprog.com

Dependencies:   mbed BLE_API nRF51822

Revision:
0:8fa1c7356f71
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jun 24 11:37:11 2020 +0000
@@ -0,0 +1,135 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "ble/BLE.h"
+#include "LEDService.h"
+#include "accelService.h"
+#include "oled.h"
+#define enable_interrupts() asm(" cpsie i ")
+#define disable_interrupts() asm(" cpsid i ")
+
+
+DigitalOut myled(P0_29);
+
+const static char     DEVICE_NAME[] = "CJMCU-8223";
+static const uint16_t uuid16_list[] = {LEDService::LED_SERVICE_UUID,accelService::ACCEL_SERVICE_UUID};
+accelService *AccelServicePtr;
+LEDService *ledServicePtr;
+
+void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
+{
+    BLE::Instance().gap().startAdvertising();
+}
+
+/**
+ * This callback allows the LEDService to receive updates to the ledState Characteristic.
+ *
+ * @param[in] params
+ *     Information about the characterisitc being updated.
+ */
+void onDataWrittenCallback(const GattWriteCallbackParams *params) {
+    if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
+        myled = *(params->data);
+    }
+}
+void onDataReadCallback(const GattReadCallbackParams *params) {
+    
+}
+/**
+ * This function is called when the ble initialization process has failed
+ */
+void onBleInitError(BLE &ble, ble_error_t error)
+{
+    /* Initialization error handling should go here */
+}
+
+/**
+ * Callback triggered when the ble initialization process has finished
+ */
+void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
+{
+    BLE&        ble   = params->ble;
+    ble_error_t error = params->error;
+
+    if (error != BLE_ERROR_NONE) {
+        /* In case of error, forward the error handling to onBleInitError */
+        onBleInitError(ble, error);
+        return;
+    }
+
+    /* Ensure that it is the default instance of BLE */
+    if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
+        return;
+    }
+ 
+    ble.gap().onDisconnection(disconnectionCallback);
+    ble.gattServer().onDataWritten(onDataWrittenCallback);
+    ble.gattServer().onDataRead(onDataReadCallback);
+    bool initialValueForLEDCharacteristic = false;
+    ledServicePtr = new LEDService(ble, initialValueForLEDCharacteristic);
+    int16_t initialValue = 0;
+    AccelServicePtr = new accelService(ble,initialValue);
+
+    /* setup advertising */
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
+    ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
+    ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
+    ble.gap().setAdvertisingInterval(100); /* 100ms. */
+    ble.gap().startAdvertising();
+}
+oled Oled;
+int main(void)
+{
+ 
+    int Count=0;
+    Oled.begin();
+    Lis3dh.begin();
+    Oled.print(0,0  ,"Hello");
+    
+
+    BLE &ble = BLE::Instance();
+    ble.init(bleInitComplete);
+    
+    while (ble.hasInitialized()  == false) { 
+        Oled.print(0,0,"BLE init fail");
+        myled = 1;
+        wait(0.2);
+        myled = 0;
+        wait(0.1);
+    
+    /* spin loop */ }
+    Oled.print(0,0,"BLE init done");
+    while (true) {
+        // update the values for the BLE interface
+        AccelServicePtr->poll();
+        int x,y,z;
+        x = 1;
+        y = 2;
+        z = 3;        
+        // show the values on the display
+        if (Lis3dh.dataReady())        
+        {
+            Lis3dh.read(x,y,z);
+            Oled.print(0,0,x/16);
+            Oled.print(0,1,y/16);
+            Oled.print(0,2,z/16);
+        }
+        ble.waitForEvent();
+        
+    }
+}