sja1000.h File Reference

This header file contains the implementation of SJA1000 controller. More...

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Macros
#define	RTEMS_SJA1000_HW_REG_SPAN_MASK   ( 3 )
	SJA1000 chip register mapping specification.
#define	RTEMS_SJA1000_HW_REG_SPAN_1   ( 0 )
	SJA1000 chip register mapping one byte each.
#define	RTEMS_SJA1000_HW_REG_SPAN_2   ( 1 )
	SJA1000 chip register mapping with span 2 bytes.
#define	RTEMS_SJA1000_HW_REG_SPAN_4   ( 2 )
	SJA1000 chip register mapping with span 4 bytes.
#define	RTEMS_SJA1000_HW_REG_IO_PORT   ( 0x100 )
	SJA1000 chip register mapping into CPU I/O space.

Functions
struct rtems_can_chip *	rtems_can_sja1000_initialize (uintptr_t addr, unsigned int hw_options, rtems_vector_number irq, rtems_task_priority worker_priority, rtems_option irq_option, unsigned long can_clk_rate)
	This function initializes the SJA1000 controller.

Detailed Description

This header file contains the implementation of SJA1000 controller.

Function Documentation

rtems_can_sja1000_initialize()

struct rtems_can_chip * rtems_can_sja1000_initialize	(	uintptr_t	addr,
		unsigned int	hw_options,
		rtems_vector_number	irq,
		rtems_task_priority	worker_priority,
		rtems_option	irq_option,
		unsigned long	can_clk_rate
	)

This function initializes the SJA1000 controller.

This is an entry point for SJA1000 controller initialization. This function allocates generic CAN and SJA1000 related structures, sets default values and initializes the resources (interrupt handler, semaphore. worker thread).

Parameters

addr	SJA1000 controller base address.
hw_options	SJA1000 controller hardware options for register mapping.
irq	Interrupt number.
worker_priotiry	The priority of TX/RX worker thread.
irq_option	RTEMS_INTERRUPT_SHARED or RTEMS_INTERRUPT_UNIQUE.
can_clk_rate	CAN clock rate.

Returns

Pointer to CAN chip structure on success, NULL otherwise.