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Bluetooth classic RFCOMM communication support #452

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Bluetooth classic RFCOMM communication support #452

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efa2712
!deleteme: Temporarily enable debugging.
jaguilar Jan 15, 2026
e66642a
!wip pbdrv/bluetooth: RFCOMM socket API.
jaguilar Jan 15, 2026
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7 changes: 5 additions & 2 deletions .vscode/c_cpp_properties.json
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,7 @@
"gcc",
"MICROPY_MODULE_FROZEN_MPY",
"MICROPY_ROM_TEXT_COMPRESSION",
"HAVE_UMM_MALLOC=1"
],
"compilerArgs": [
"-Wall",
Expand Down Expand Up @@ -286,7 +287,8 @@
],
"defines": [
"MICROPY_MODULE_FROZEN_MPY",
"MICROPY_ROM_TEXT_COMPRESSION"
"MICROPY_ROM_TEXT_COMPRESSION",
"HAVE_UMM_MALLOC=1"
],
"compilerArgs": [
"-mthumb",
Expand Down Expand Up @@ -404,7 +406,8 @@
],
"defines": [
"MICROPY_MODULE_FROZEN_MPY",
"MICROPY_USE_READLINE=1"
"MICROPY_USE_READLINE=1",
"HAVE_UMM_MALLOC=1",
],
"compilerPath": "/usr/bin/gcc",
"cStandard": "c11",
Expand Down
13 changes: 12 additions & 1 deletion bricks/_common/common.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -416,6 +416,16 @@ BTSTACK_BLE_SRC_C += $(addprefix lib/btstack/src/ble/,\
sm.c \
)

BTSTACK_CLASSIC_SRC_C = $(addprefix lib/btstack/src/classic/,\
btstack_link_key_db_memory.c \
rfcomm.c \
sdp_client.c \
sdp_client_rfcomm.c \
sdp_server.c \
sdp_util.c \
spp_server.c \
)

BTSTACK_SRC_C += $(addprefix lib/btstack/chipset/cc256x/,\
btstack_chipset_cc256x.c \
)
Expand Down Expand Up @@ -519,7 +529,7 @@ SRC_STM32_USB_DEV += $(addprefix lib/pbio/drv/usb/stm32_usbd/,\
SRC_UMM_MALLOC = lib/umm_malloc/src/umm_malloc.c

ifeq ($(PB_LIB_UMM_MALLOC),1)
CFLAGS += -I$(PBTOP)/lib/umm_malloc/src
CFLAGS += -I$(PBTOP)/lib/umm_malloc/src -DHAVE_UMM_MALLOC=1
endif

# NXT OS
Expand Down Expand Up @@ -579,6 +589,7 @@ ifeq ($(PB_LIB_BTSTACK),1)
ifneq ($(CI_MODE),1)
OBJ += $(addprefix $(BUILD)/, $(BTSTACK_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(BTSTACK_BLE_SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(BTSTACK_CLASSIC_SRC_C:.c=.o))
$(BUILD)/lib/btstack/%.o: CFLAGS += -Wno-error
endif
endif
Expand Down
4 changes: 4 additions & 0 deletions lib/pbio/drv/bluetooth/bluetooth.c
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Original file line number Diff line number Diff line change
Expand Up @@ -729,6 +729,10 @@ pbio_error_t pbdrv_bluetooth_close_user_tasks(pbio_os_state_t *state, pbio_os_ti

PBIO_OS_ASYNC_BEGIN(state);

#if PBDRV_CONFIG_BLUETOOTH_NUM_CLASSIC_CONNECTIONS
pbdrv_bluetooth_rfcomm_disconnect_all();
#endif // PBDRV_CONFIG_BLUETOOTH_NUM_CLASSIC_CONNECTIONS

for (peri_index = 0; peri_index < PBDRV_CONFIG_BLUETOOTH_NUM_PERIPHERALS; peri_index++) {
peri = pbdrv_bluetooth_peripheral_get_by_index(peri_index);
// Await ongoing peripheral user task, requesting cancellation to
Expand Down
11 changes: 11 additions & 0 deletions lib/pbio/drv/bluetooth/bluetooth.h
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Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,17 @@ typedef struct {

pbio_error_t pbdrv_bluetooth_inquiry_scan_func(pbio_os_state_t *state, void *context);

// The following functions are defined in each Bluetooth implementation that
// supports RFCOMM sockets.

// Cancels all pending connection attempts. Called e.g. when the user interrupts
// execution to drop into the debug REPL.
void pbdrv_bluetooth_rfcomm_cancel_connection();

// Disconnects all active RFCOMM connections and cleans up all sockets. Called
// during user program termination.
void pbdrv_bluetooth_rfcomm_disconnect_all();

#endif // PBDRV_CONFIG_BLUETOOTH

#endif // _INTERNAL_PBDRV_BLUETOOTH_H_
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