eCos Reference Manual
Prev |  | Next

# Chapter 33. Configuration

The CAN subsystem has a number of configuration options.

cdl_interface CYGINT_IO_CAN_TIMESTAMP

  A hardware device driver that supports timestamps should implement this interface.

cdl_option CYGOPT_IO_CAN_SUPPORT_TIMESTAMP

  If the CAN hardware driver supports some kind of timestamps then this option enables propagation of timestamps to higher layers. This may add some extra code to hardware drivers.

cdl_option CYGOPT_IO_CAN_TX_EVENT_SUPPORT

  This option enables support for TX events. If a CAN message is transmitted successfully a TX event will be inserted into the receive event queue and propagated to higher layers. If this option is enabled the RX event queue will be filled faster.

cdl_option CYGOPT_IO_CAN_SUPPORT_NONBLOCKING

  This option enables extra code in the generic CAN driver which allows clients to switch read() and write() call semantics from blocking to non-blocking.

cdl_option CYGOPT_IO_CAN_SUPPORT_CALLBACK

  This option enables extra code in the generic CAN driver which allows an application to register a callback for events. The callback function is called from DSR context so you should be careful to only call API functions that are safe in DSR context.

cdl_option CYGNUM_IO_CAN_DEFAULT_TIMEOUT_READ

  The initial timeout value in clock ticks for `cyg_io_read()` calls.

cdl_option CYGNUM_IO_CAN_DEFAULT_TIMEOUT_WRITE

  The initial timeout value in clock ticks for `cyg_io_write()` calls.

Prev | Home | Next
Runtime Configuration | Up | Writing a CAN hardware device driver