btstack_config.h

#ifndef _PICO_BTSTACK_BTSTACK_CONFIG_H
#define _PICO_BTSTACK_BTSTACK_CONFIG_H

#ifndef ENABLE_BLE
#error Please link to pico_btstack_ble
#endif

// BTstack features that can be enabled
#define ENABLE_LE_PERIPHERAL
#define ENABLE_LOG_INFO
#define ENABLE_LOG_ERROR
#define ENABLE_PRINTF_HEXDUMP

// for the client
#if RUNNING_AS_CLIENT
#define ENABLE_LE_CENTRAL
#define MAX_NR_GATT_CLIENTS 1
#else
#define MAX_NR_GATT_CLIENTS 0
#endif

// BTstack configuration. buffers, sizes, ...
#define HCI_OUTGOING_PRE_BUFFER_SIZE 4
#define HCI_ACL_PAYLOAD_SIZE (255 + 4)
#define HCI_ACL_CHUNK_SIZE_ALIGNMENT 4
#define MAX_NR_HCI_CONNECTIONS 1
#define MAX_NR_SM_LOOKUP_ENTRIES 3
#define MAX_NR_WHITELIST_ENTRIES 16
#define MAX_NR_LE_DEVICE_DB_ENTRIES 16

// 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 (255+4)
#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

#endif // MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_H