extmod/btstack: Allow the BTstack config to be overridden by a board.

If a board defines MICROPY_BLUETOOTH_BTSTACK_CONFIG_FILE as the path to a
header file, then that file will be used for the BTstack config.

Signed-off-by: Damien George <damien@micropython.org>

extmod/btstack/btstack.mk

@@ -6,6 +6,7 @@ GIT_SUBMODULES += lib/btstack
 
 MICROPY_BLUETOOTH_BTSTACK_USB ?= 0
 MICROPY_BLUETOOTH_BTSTACK_H4 ?= 1
+MICROPY_BLUETOOTH_BTSTACK_CONFIG_FILE ?= '"extmod/btstack/btstack_config_common.h"'
 
 BTSTACK_EXTMOD_DIR = extmod/btstack
 
@@ -14,6 +15,7 @@ SRC_EXTMOD_C += $(BTSTACK_EXTMOD_DIR)/modbluetooth_btstack.c
 INC += -I$(TOP)/$(BTSTACK_EXTMOD_DIR)
 
 CFLAGS_EXTMOD += -DMICROPY_BLUETOOTH_BTSTACK=1
+CFLAGS_EXTMOD += -DMICROPY_BLUETOOTH_BTSTACK_CONFIG_FILE=$(MICROPY_BLUETOOTH_BTSTACK_CONFIG_FILE)
 CFLAGS_EXTMOD += -DMICROPY_PY_BLUETOOTH_USE_SYNC_EVENTS=1
 CFLAGS_EXTMOD += -DMICROPY_PY_BLUETOOTH_ENABLE_PAIRING_BONDING=1
 

extmod/btstack/btstack_config.h

@@ -1,48 +1,6 @@
 #ifndef MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_H
 #define MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_H
 
-// BTstack features that can be enabled
-#define ENABLE_BLE
-#define ENABLE_LE_PERIPHERAL
-#define ENABLE_LE_CENTRAL
-// #define ENABLE_CLASSIC
-#define ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE
-// #define ENABLE_LOG_INFO
-// #define ENABLE_LOG_DEBUG
-#define ENABLE_LOG_ERROR
-
-// BTstack configuration. buffers, sizes, ...
-#define HCI_ACL_PAYLOAD_SIZE 1021
-#define MAX_NR_GATT_CLIENTS 1
-#define MAX_NR_HCI_CONNECTIONS 1
-#define MAX_NR_L2CAP_SERVICES  3
-#define MAX_NR_L2CAP_CHANNELS  3
-#define MAX_NR_RFCOMM_MULTIPLEXERS 1
-#define MAX_NR_RFCOMM_SERVICES 1
-#define MAX_NR_RFCOMM_CHANNELS 1
-#define MAX_NR_BTSTACK_LINK_KEY_DB_MEMORY_ENTRIES  2
-#define MAX_NR_BNEP_SERVICES 1
-#define MAX_NR_BNEP_CHANNELS 1
-#define MAX_NR_HFP_CONNECTIONS 1
-#define MAX_NR_WHITELIST_ENTRIES 1
-#define MAX_NR_SM_LOOKUP_ENTRIES 3
-#define MAX_NR_SERVICE_RECORD_ITEMS 1
-#define MAX_NR_AVDTP_STREAM_ENDPOINTS 1
-#define MAX_NR_AVDTP_CONNECTIONS 1
-#define MAX_NR_AVRCP_CONNECTIONS 1
-
-#define MAX_NR_LE_DEVICE_DB_ENTRIES 4
-
-// Link Key DB and LE Device DB using TLV on top of Flash Sector interface
-// #define NVM_NUM_DEVICE_DB_ENTRIES 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
-
-// Some USB dongles take longer to respond to HCI reset (e.g. BCM20702A).
-#define HCI_RESET_RESEND_TIMEOUT_MS 1000
+#include MICROPY_BLUETOOTH_BTSTACK_CONFIG_FILE
 
 #endif // MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_H

extmod/btstack/btstack_config_common.h

@@ -0,0 +1,48 @@
+#ifndef MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_COMMON_H
+#define MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_COMMON_H
+
+// BTstack features that can be enabled
+#define ENABLE_BLE
+#define ENABLE_LE_PERIPHERAL
+#define ENABLE_LE_CENTRAL
+// #define ENABLE_CLASSIC
+#define ENABLE_L2CAP_LE_CREDIT_BASED_FLOW_CONTROL_MODE
+// #define ENABLE_LOG_INFO
+// #define ENABLE_LOG_DEBUG
+#define ENABLE_LOG_ERROR
+
+// BTstack configuration. buffers, sizes, ...
+#define HCI_ACL_PAYLOAD_SIZE 1021
+#define MAX_NR_GATT_CLIENTS 1
+#define MAX_NR_HCI_CONNECTIONS 1
+#define MAX_NR_L2CAP_SERVICES  3
+#define MAX_NR_L2CAP_CHANNELS  3
+#define MAX_NR_RFCOMM_MULTIPLEXERS 1
+#define MAX_NR_RFCOMM_SERVICES 1
+#define MAX_NR_RFCOMM_CHANNELS 1
+#define MAX_NR_BTSTACK_LINK_KEY_DB_MEMORY_ENTRIES  2
+#define MAX_NR_BNEP_SERVICES 1
+#define MAX_NR_BNEP_CHANNELS 1
+#define MAX_NR_HFP_CONNECTIONS 1
+#define MAX_NR_WHITELIST_ENTRIES 1
+#define MAX_NR_SM_LOOKUP_ENTRIES 3
+#define MAX_NR_SERVICE_RECORD_ITEMS 1
+#define MAX_NR_AVDTP_STREAM_ENDPOINTS 1
+#define MAX_NR_AVDTP_CONNECTIONS 1
+#define MAX_NR_AVRCP_CONNECTIONS 1
+
+#define MAX_NR_LE_DEVICE_DB_ENTRIES 4
+
+// Link Key DB and LE Device DB using TLV on top of Flash Sector interface
+// #define NVM_NUM_DEVICE_DB_ENTRIES 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
+
+// Some USB dongles take longer to respond to HCI reset (e.g. BCM20702A).
+#define HCI_RESET_RESEND_TIMEOUT_MS 1000
+
+#endif // MICROPY_INCLUDED_EXTMOD_BTSTACK_BTSTACK_CONFIG_COMMON_H