Merge pull request #216 from pperanich/fix-variable-fields

fix: initialize storage arrays manually instead of `Default::default()`

Author: lulf

host-macros/src/service.rs

@@ -150,7 +150,7 @@ impl ServiceBuilder {
                 static #name_screaming: static_cell::StaticCell<[u8; <#ty as GattValue>::MAX_SIZE]> = static_cell::StaticCell::new();
                 let mut val = <#ty>::default(); // constrain the type of the value here
                 val = #default_value; // update the temporary value with our new default
-                let store = #name_screaming.init(Default::default());
+                let store = #name_screaming.init([0; <#ty as GattValue>::MAX_SIZE]);
                 let mut builder = service
                     .add_characteristic(#uuid, &[#(#properties),*], val, store);
                 #descriptors

host/tests/gatt_derive.rs

@@ -16,7 +16,7 @@ const VALUE_UUID: Uuid = Uuid::new_long([
     0x00, 0x00, 0x10, 0x01, 0xb0, 0xcd, 0x11, 0xec, 0x87, 0x1f, 0xd4, 0x5d, 0xdf, 0x13, 0x88, 0x40,
 ]);
 
-#[gatt_server(mutex_type = NoopRawMutex, attribute_table_size = 22)]
+#[gatt_server(mutex_type = NoopRawMutex, attribute_table_size = 25)]
 struct Server {
     service: CustomService,
 }
@@ -40,6 +40,8 @@ struct CustomService {
     pub third: [u8; 2],
     #[characteristic(uuid = "408816df-5dd4-1f87-ec11-cdb001100000", read, write, notify)]
     pub fourth: heapless::Vec<u8, 3>,
+    #[characteristic(uuid = "408817df-5dd4-1f87-ec11-cdb001100000", read, write, notify)]
+    pub fifth: heapless::Vec<u8, 33>,
 }
 
 #[tokio::test]