Add 7-bit words to configuration options

Author: Keybinder

src/serial/config.rs

@@ -109,6 +109,11 @@ impl LowPowerConfig {
         self
     }
 
+    pub fn wordlength_7(mut self) -> Self {
+        self.wordlength = WordLength::DataBits7;
+        self
+    }
+
     pub fn wordlength_8(mut self) -> Self {
         self.wordlength = WordLength::DataBits8;
         self
@@ -197,6 +202,11 @@ impl FullConfig {
         self
     }
 
+    pub fn wordlength_7(mut self) -> Self {
+        self.wordlength = WordLength::DataBits7;
+        self
+    }
+
     pub fn wordlength_8(mut self) -> Self {
         self.wordlength = WordLength::DataBits8;
         self