Add BLE support to BluetoothHIDMaster (#2208)

Support Bluetooth BLE keyboard and mice using the same HID master
infrastructure as the BT Classic.

Author: earlephilhower

README.md

@@ -87,7 +87,7 @@ Read the [Contributing Guide](https://github.com/earlephilhower/arduino-pico/blo
 # Features
 * Adafruit TinyUSB Arduino (USB mouse, keyboard, flash drive, generic HID, CDC Serial, MIDI, WebUSB, others)
 * Bluetooth on the PicoW (Classic and BLE) with Keyboard, Mouse, Joystick, and Virtual Serial
-* Bluetooth Classic HID master mode (connect to BT keyboard or mouse)
+* Bluetooth Classic and BLE HID master mode (connect to BT keyboard or mouse)
 * Generic Arduino USB Serial, Keyboard, Joystick, and Mouse emulation
 * WiFi (Pico W, ESP32-based ESPHost, Atmel WINC1500)
 * Ethernet (Wired W5500, W5100, ENC28J60)

libraries/BluetoothHCI/examples/BluetoothBLEScanner/BluetoothBLEScanner.ino

@@ -0,0 +1,34 @@
+#include <BluetoothHCI.h>
+
+BluetoothHCI hci;
+
+void BTBasicSetup() {
+  l2cap_init();
+  gatt_client_init();
+  sm_init();
+  sm_set_io_capabilities(IO_CAPABILITY_NO_INPUT_NO_OUTPUT);
+  gap_set_default_link_policy_settings(LM_LINK_POLICY_ENABLE_SNIFF_MODE | LM_LINK_POLICY_ENABLE_ROLE_SWITCH);
+  hci_set_master_slave_policy(HCI_ROLE_MASTER);
+  hci_set_inquiry_mode(INQUIRY_MODE_RSSI_AND_EIR);
+
+  hci.setBLEName("Pico BLE Scanner");
+  hci.install();
+  hci.begin();
+}
+
+void setup() {
+  delay(5000);
+  BTBasicSetup();
+}
+
+void loop() {
+  Serial.printf("BEGIN BLE SCAN @%lu ...", millis());
+  auto l = hci.scanBLE(BluetoothHCI::any_cod);
+  Serial.printf("END BLE SCAN @%lu\n\n", millis());
+  Serial.printf("%-8s | %-17s | %-4s | %s\n", "Class", "Address", "RSSI", "Name");
+  Serial.printf("%-8s | %-17s | %-4s | %s\n", "--------", "-----------------", "----", "----------------");
+  for (auto e : l) {
+    Serial.printf("%08lx | %17s | %4d | %s\n", e.deviceClass(), e.addressString(), e.rssi(), e.name());
+  }
+  Serial.printf("\n\n\n");
+}

libraries/BluetoothHCI/keywords.txt

@@ -20,9 +20,13 @@ scan	KEYWORD2
 scanAsyncDone	KEYWORD2
 scanAsyncResult	KEYWORD2
 
+setName	KEYWORD2
+scanBLE	KEYWORD2
+
 # BTDeviceInfo
 deviceClass	KEYWORD2
 address	KEYWORD2
+addressType	KEYWORD2
 addressString	KEYWORD2
 rssi	KEYWORD2
 name	KEYWORD2

libraries/BluetoothHCI/src/BluetoothDevice.h

@@ -27,14 +27,26 @@ class BTDeviceInfo {
     BTDeviceInfo(uint32_t dc, const uint8_t addr[6], int rssi, const char *name) {
         _deviceClass = dc;
         memcpy(_address, addr, sizeof(_address));
+        _addressType = -1;
         sprintf(_addressString, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
         _rssi = rssi;
         _name = strdup(name);
     }
+    BTDeviceInfo(uint32_t dc, const uint8_t addr[6], int addressType, int rssi, const char *name, size_t nameLen) {
+        _deviceClass = dc;
+        memcpy(_address, addr, sizeof(_address));
+        sprintf(_addressString, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+        _addressType = addressType;
+        _rssi = rssi;
+        _name = (char *)malloc(nameLen + 1);
+        memcpy(_name, name, nameLen);
+        _name[nameLen] = 0;
+    }
     // Copy constructor to ensure we deep-copy the string
     BTDeviceInfo(const BTDeviceInfo &b) {
         _deviceClass = b._deviceClass;
         memcpy(_address, b._address, sizeof(_address));
+        _addressType = b._addressType;
         memcpy(_addressString, b._addressString, sizeof(_addressString));
         _rssi = b._rssi;
         _name = strdup(b._name);
@@ -57,9 +69,13 @@ class BTDeviceInfo {
     const char *name() {
         return _name;
     }
+    int addressType() {
+        return _addressType;
+    }
 private:
     uint32_t _deviceClass;
     uint8_t _address[6];
+    int _addressType;
     char _addressString[18];
     int8_t _rssi;
     char *_name;