fix: HCI only Firmware not supporting ACI_GAP_INIT ACI_GATT_INIT

On STM32WB, Cube FW version 1.14.1,
messages ACI_GATT_INIT and ACI_GAP_INIT
are not available on HCI only BLE firmware
(stm32wb5x_BLE_HCILayer_fw.bin)
This imply to move Random Address to host instead of relying on controller

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>

Author: ABOSTM

src/local/BLELocalDevice.cpp

@@ -124,6 +124,20 @@ int BLELocalDevice::begin()
     return 0;
   }
 
+  uint8_t randomNumber[8];
+  if (HCI.leRand(randomNumber) != 0) {
+    end();
+    return 0;
+  }
+  /* Random address only requires 6 bytes (48 bits)
+   * Force both MSB bits to b00 in order to define Static Random Address
+   */
+  randomNumber[5] |= 0xC0;
+  if (HCI.leSetRandomAddress((uint8_t*)randomNumber) != 0) {
+    end();
+    return 0;
+  }
+
   uint8_t hciVer;
   uint16_t hciRev;
   uint8_t lmpVer;