Update example with MAX_SIZE

Author: YuhanLiin

README.md

@@ -86,8 +86,13 @@ fn main() {
         ..Default::default()
     };
 
+    // Maximum size of the message type on the wire, scaled to the next power of 2 due to heapless::Vec
+    const CAPACITY: usize = example::Example::MAX_SIZE.unwrap().next_power_of_two();
+    // For the example message above we can use a smaller capacity
+    // const CAPACITY: usize = 32;
+
     // Use heapless::Vec as the output stream and build an encoder around it
-    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, 32>::new());
+    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, CAPACITY>::new());
 
     // Compute the size of the `Example` on the wire
     let size = example.compute_size();
@@ -420,7 +425,7 @@ use micropb::{PbEncoder, PbWrite, MessageEncode};
 use micropb::heapless::Vec;
                                                                                                  
 // Use heapless::Vec as the output stream and build an encoder around it
-let mut encoder = PbEncoder::new(Vec::<u8, 10>::new());
+let mut encoder = PbEncoder::new(Vec::<u8, 16>::new());
 
 // ProtoMessage was generated by micropb
 let mut message = ProtoMessage::default();

examples/basic/src/main.rs

@@ -16,8 +16,13 @@ fn main() {
         ..Default::default()
     };
 
+    // Maximum size of the message type on the wire, scaled to the next power of 2 due to heapless::Vec
+    const CAPACITY: usize = example::Example::MAX_SIZE.unwrap().next_power_of_two();
+    // For the example message above we can use a smaller capacity
+    // const CAPACITY: usize = 32;
+
     // Use heapless::Vec as the output stream and build an encoder around it
-    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, 32>::new());
+    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, CAPACITY>::new());
 
     // Compute the size of the `Example` on the wire
     let _size = example.compute_size();

micropb/README.md

@@ -86,8 +86,13 @@ fn main() {
         ..Default::default()
     };
 
+    // Maximum size of the message type on the wire, scaled to the next power of 2 due to heapless::Vec
+    const CAPACITY: usize = example::Example::MAX_SIZE.unwrap().next_power_of_two();
+    // For the example message above we can use a smaller capacity
+    // const CAPACITY: usize = 32;
+
     // Use heapless::Vec as the output stream and build an encoder around it
-    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, 32>::new());
+    let mut encoder = PbEncoder::new(micropb::heapless::Vec::<u8, CAPACITY>::new());
 
     // Compute the size of the `Example` on the wire
     let size = example.compute_size();
@@ -420,7 +425,7 @@ use micropb::{PbEncoder, PbWrite, MessageEncode};
 use micropb::heapless::Vec;
                                                                                                  
 // Use heapless::Vec as the output stream and build an encoder around it
-let mut encoder = PbEncoder::new(Vec::<u8, 10>::new());
+let mut encoder = PbEncoder::new(Vec::<u8, 16>::new());
 
 // ProtoMessage was generated by micropb
 let mut message = ProtoMessage::default();