Add Bluetooth support

Co-authored-by: Peter Harper <77111776+peterharperuk@users.noreply.github.com>

test/kitchen_sink/CMakeLists.txt

@@ -131,6 +131,10 @@ if (TARGET pico_cyw43_arch)
     pico_add_extra_outputs(kitchen_sink_lwip_poll)
     target_link_libraries(kitchen_sink_lwip_poll
             pico_cyw43_arch_lwip_poll)
+    if (TARGET pico_btstack)
+        target_link_libraries(kitchen_sink_lwip_poll
+            pico_btstack_ble pico_btstack_classic pico_btstack_cyw43)
+    endif()
     # for lwipopts.h
     target_include_directories(kitchen_sink_lwip_poll PRIVATE
             ${CMAKE_CURRENT_LIST_DIR})
@@ -154,3 +158,7 @@ if (TARGET pico_cyw43_arch)
         suppress_mbedtls_warnings()
     endif()
 endif()
+
+if (TARGET pico_btstack_base AND COMMAND suppress_btstack_warnings)
+    suppress_btstack_warnings()
+endif()

test/kitchen_sink/btstack_config.h

@@ -0,0 +1,73 @@
+#ifndef _PICO_BTSTACK_BTSTACK_CONFIG_H
+#define _PICO_BTSTACK_BTSTACK_CONFIG_H
+
+// BTstack features that can be enabled
+#define ENABLE_LE_PERIPHERAL
+#define ENABLE_LE_CENTRAL
+#define ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE
+#define ENABLE_LOG_INFO
+#define ENABLE_LOG_ERROR
+#define ENABLE_PRINTF_HEXDUMP
+
+// BTstack configuration. buffers, sizes, ...
+#define HCI_OUTGOING_PRE_BUFFER_SIZE 4
+#define HCI_ACL_PAYLOAD_SIZE (1691 + 4)
+#define HCI_ACL_CHUNK_SIZE_ALIGNMENT 4
+#define MAX_NR_AVDTP_CONNECTIONS 1
+#define MAX_NR_AVDTP_STREAM_ENDPOINTS 1
+#define MAX_NR_AVRCP_CONNECTIONS 2
+#define MAX_NR_BNEP_CHANNELS 1
+#define MAX_NR_BNEP_SERVICES 1
+#define MAX_NR_BTSTACK_LINK_KEY_DB_MEMORY_ENTRIES  2
+#define MAX_NR_GATT_CLIENTS 1
+#define MAX_NR_HCI_CONNECTIONS 2
+#define MAX_NR_HFP_CONNECTIONS 1
+#define MAX_NR_L2CAP_CHANNELS  4
+#define MAX_NR_L2CAP_SERVICES  3
+#define MAX_NR_RFCOMM_CHANNELS 1
+#define MAX_NR_RFCOMM_MULTIPLEXERS 1
+#define MAX_NR_RFCOMM_SERVICES 1
+#define MAX_NR_SERVICE_RECORD_ITEMS 4
+#define MAX_NR_SM_LOOKUP_ENTRIES 3
+#define MAX_NR_WHITELIST_ENTRIES 1
+
+#define MAX_NR_LE_DEVICE_DB_ENTRIES 4
+
+// Limit number of ACL/SCO Buffer to use by stack to avoid cyw43 shared bus overrun
+#define MAX_NR_CONTROLLER_ACL_BUFFERS 3
+#define MAX_NR_CONTROLLER_SCO_PACKETS 3
+
+// Enable and configure HCI Controller to Host Flow Control to avoid cyw43 shared bus overrun
+#define ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL
+#define HCI_HOST_ACL_PACKET_LEN 1024
+#define HCI_HOST_ACL_PACKET_NUM 3
+#define HCI_HOST_SCO_PACKET_LEN 120
+#define HCI_HOST_SCO_PACKET_NUM 3
+
+// Link Key DB and LE Device DB using TLV on top of Flash Sector interface
+#define NVM_NUM_DEVICE_DB_ENTRIES 16
+#define NVM_NUM_LINK_KEYS 16
+
+// We don't give btstack a malloc, so use a fixed-size ATT DB.
+#define MAX_ATT_DB_SIZE 512
+
+// BTstack HAL configuration
+#define HAVE_EMBEDDED_TIME_MS
+
+// map btstack_assert onto Pico SDK assert()
+#define HAVE_ASSERT
+
+// Some USB dongles take longer to respond to HCI reset (e.g. BCM20702A).
+#define HCI_RESET_RESEND_TIMEOUT_MS 1000
+
+#define ENABLE_SOFTWARE_AES128
+#define ENABLE_MICRO_ECC_FOR_LE_SECURE_CONNECTIONS
+
+#define HAVE_BTSTACK_STDIN
+
+// To get the audio demos working even with HCI dump at 115200, this truncates long ACL packetws
+//#define HCI_DUMP_STDOUT_MAX_SIZE_ACL 100
+
+#define ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
+
+#endif // MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_H