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extmod/modbluetooth: Extract out gatts_db functionality from nimble.

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For use by other stacks, if they need it.

Work done in collaboration with Jim Mussared aka @jimmo.
This commit is contained in:
Damien George
2020-02-20 14:37:32 +11:00
parent 894c550c86
commit 0ac06a510a
4 changed files with 113 additions and 72 deletions
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36
extmod/modbluetooth.h
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@@ -54,10 +54,12 @@
#endif
// Common constants.
#ifndef MP_BLUETOOTH_MAX_ATTR_SIZE
#define MP_BLUETOOTH_MAX_ATTR_SIZE (20)
#ifndef MP_BLUETOOTH_DEFAULT_ATTR_LEN
#define MP_BLUETOOTH_DEFAULT_ATTR_LEN (20)
#endif
#define MP_BLUETOOTH_CCCB_LEN (2)
// Advertisement packet lengths
#define MP_BLUETOOTH_GAP_ADV_MAX_LEN (32)
@@ -267,4 +269,34 @@ void mp_bluetooth_gattc_on_data_available_end(void);
void mp_bluetooth_gattc_on_write_status(uint16_t conn_handle, uint16_t value_handle, uint16_t status);
#endif
// For stacks that don't manage attribute value data (currently all of them), helpers
// to store this in a map, keyed by value handle.
typedef struct {
// Pointer to heap-allocated data.
uint8_t *data;
// Allocated size of data.
size_t data_alloc;
// Current bytes in use.
size_t data_len;
// Whether new writes append or replace existing data (default false).
bool append;
} mp_bluetooth_gatts_db_entry_t;
typedef mp_map_t *mp_gatts_db_t;
STATIC inline void mp_bluetooth_gatts_db_create(mp_gatts_db_t *db) {
*db = m_new(mp_map_t, 1);
}
STATIC inline void mp_bluetooth_gatts_db_reset(mp_gatts_db_t db) {
mp_map_init(db, 0);
}
void mp_bluetooth_gatts_db_create_entry(mp_gatts_db_t db, uint16_t handle, size_t len);
mp_bluetooth_gatts_db_entry_t *mp_bluetooth_gatts_db_lookup(mp_gatts_db_t db, uint16_t handle);
int mp_bluetooth_gatts_db_read(mp_gatts_db_t db, uint16_t handle, uint8_t **value, size_t *value_len);
int mp_bluetooth_gatts_db_write(mp_gatts_db_t db, uint16_t handle, const uint8_t *value, size_t value_len);
int mp_bluetooth_gatts_db_resize(mp_gatts_db_t db, uint16_t handle, size_t len, bool append);
#endif // MICROPY_INCLUDED_EXTMOD_MODBLUETOOTH_H