IO

Data Structures
struct	avr_io_t
	IO module base struct Modules uses that as their first member in their own struct. More...

Macros
#define	AVR_IOCTL_DEF(_a, _b, _c, _d)   (((_a) << 24)|((_b) << 16)|((_c) << 8)|((_d)))
	Used by the ioports to implement their own features see avr_eeprom. More...
#define	AVR_IOMEM_IRQ_ALL   8

Typedefs
typedef struct avr_io_t	avr_io_t
	IO module base struct Modules uses that as their first member in their own struct. More...

Functions
void	avr_register_io (avr_t *avr, avr_io_t *io)
	Registers an IO module, so it's run(), reset() etc are called. More...
avr_irq_t *	avr_io_setirqs (avr_io_t *io, uint32_t ctl, int count, avr_irq_t *irqs)
	Sets an IO module "official" IRQs and the ioctl used to get to them. More...
void	avr_register_io_read (avr_t *avr, avr_io_addr_t addr, avr_io_read_t read, void *param)
	Register a callback for when IO register "addr" is read. More...
void	avr_register_io_write (avr_t *avr, avr_io_addr_t addr, avr_io_write_t write, void *param)
	Register a callback for when the IO register is written. callback has to set the memory itself. More...
int	avr_ioctl (avr_t *avr, uint32_t ctl, void *io_param)
	Call every IO modules until one responds to this. More...
struct avr_irq_t *	avr_io_getirq (avr_t *avr, uint32_t ctl, int index)
	Get the specific irq for a module, check AVR_IOCTL_IOPORT_GETIRQ for example. More...
avr_irq_t *	avr_iomem_getirq (avr_t *avr, avr_io_addr_t addr, const char *name, int index)
	Get the IRQ for an absolute IO address. More...
void	avr_deallocate_ios (avr_t *avr)
	Terminates all IOs and remove from them from the io chain. More...

Detailed Description

Macro Definition Documentation

#define AVR_IOCTL_DEF	(		_a,
			_b,
			_c,
			_d
	)		(((_a) << 24)|((_b) << 16)|((_c) << 8)|((_d)))

Used by the ioports to implement their own features see avr_eeprom.

• for an example, and avr_ioctl().

#define AVR_IOMEM_IRQ_ALL   8

Typedef Documentation

typedef struct avr_io_t avr_io_t

IO module base struct Modules uses that as their first member in their own struct.

Function Documentation

void avr_deallocate_ios

(

avr_t *

avr

)

Terminates all IOs and remove from them from the io chain.

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struct avr_irq_t* avr_io_getirq	(	avr_t *	avr,
		uint32_t	ctl,
		int	index
	)

Get the specific irq for a module, check AVR_IOCTL_IOPORT_GETIRQ for example.

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avr_irq_t* avr_io_setirqs	(	avr_io_t *	io,
		uint32_t	ctl,
		int	count,
		avr_irq_t *	irqs
	)

Sets an IO module "official" IRQs and the ioctl used to get to them.

If 'irqs' is NULL, * 'count' will be allocated

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int avr_ioctl	(	avr_t *	avr,
		uint32_t	ctl,
		void *	io_param
	)

Call every IO modules until one responds to this.

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avr_irq_t* avr_iomem_getirq	(	avr_t *	avr,
		avr_io_addr_t	addr,
		const char *	name,
		int	index
	)

Get the IRQ for an absolute IO address.

This allows any code to hook an IRQ in any io address, for example tracing changes of values into a register Note that the values do not "magically" change, they change only when the AVR code attempt to read and write at that address the "index" is a bit number, or ALL bits if index == 8

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void avr_register_io	(	avr_t *	avr,
		avr_io_t *	io
	)

Registers an IO module, so it's run(), reset() etc are called.

This is called by the AVR core init functions, you /could/ register an external one after instantiation, for whatever purpose...

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void avr_register_io_read	(	avr_t *	avr,
		avr_io_addr_t	addr,
		avr_io_read_t	read,
		void *	param
	)

Register a callback for when IO register "addr" is read.

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void avr_register_io_write	(	avr_t *	avr,
		avr_io_addr_t	addr,
		avr_io_write_t	write,
		void *	param
	)

Register a callback for when the IO register is written. callback has to set the memory itself.

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