9.1.3.3 Workflow

  1. Initialize AST to generate periodic event 0. see sam/drivers/events/example1 for more detail: 
    init_ast();
  2. Initialize the event module and enable it: 
    init_events();
  3. Initialize PDCA channel 0 to transfer data to USART. see sam/drivers/events/example1 for more detail: 
    init_pdca();