ISOTPConfig: Add option to override max_dlen

src/isotp/mod.rs

@@ -60,6 +60,8 @@ pub struct IsoTPConfig {
  pub fd: bool,
  /// Extended address
  pub ext_address: Option<u8>,
+ /// Max data length. Will use default of 8 (CAN) or 64 (CAN-FD)
+ pub max_dlen: Option<usize>,
 }
 
 impl IsoTPConfig {
@@ -97,6 +99,7 @@ impl IsoTPConfig {
  separation_time_min: None,
  fd: false,
  ext_address: None,
+ max_dlen: None,
  }
  }
 }
@@ -156,10 +159,15 @@ impl<'a> IsoTPAdapter<'a> {
 
  /// Maximum data length for a CAN frame based on the current config
  fn max_can_data_length(&self) -> usize {
- if self.config.fd {
- self.can_fd_max_dlen()
- } else {
- self.can_max_dlen()
+ match self.config.max_dlen {
+ Some(dlen) => dlen,
+ None => {
+ if self.config.fd {
+ self.can_fd_max_dlen()
+ } else {
+ self.can_max_dlen()
+ }
+ }
  }
  }