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extmod/modbluetooth: Add optional 4th arg to gattc_write for write mode.

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This allows the user to explicitly select the behaviour of the write to the
remote peripheral.  This is needed for peripherals that have
characteristics with WRITE_NO_RESPONSE set (instead of normal WRITE).  The
function's signature is now:

    BLE.gattc_write(conn_handle, value_handle, data, mode=0)

mode=0 means write without response, while mode=1 means write with
response.  The latter was the original behaviour so this commit is a change
in behaviour of this method, and one should specify 1 as the 4th argument
to get back the old behaviour.

In the future there could be more modes supported, such as long writes.
This commit is contained in:
Damien George
2019-11-29 12:48:38 +11:00
parent 9a849cc7ca
commit 7aeafe2ae9
4 changed files with 33 additions and 7 deletions
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8
extmod/modbluetooth.c
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@@ -641,9 +641,13 @@ STATIC mp_obj_t bluetooth_ble_gattc_write(size_t n_args, const mp_obj_t *args) {
mp_buffer_info_t bufinfo = {0};
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
size_t len = bufinfo.len;
return bluetooth_handle_errno(mp_bluetooth_gattc_write(conn_handle, value_handle, bufinfo.buf, &len));
unsigned int mode = MP_BLUETOOTH_WRITE_MODE_NO_RESPONSE;
if (n_args == 5) {
mode = mp_obj_get_int(args[4]);
}
return bluetooth_handle_errno(mp_bluetooth_gattc_write(conn_handle, value_handle, bufinfo.buf, &len, mode));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_write_obj, 4, 4, bluetooth_ble_gattc_write);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_write_obj, 4, 5, bluetooth_ble_gattc_write);
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE