Difference between IORD_32DIRECT and IORD_ALTERA_AVALON_PIO_DATA

IORD_ALTERA_AVALON_PIO_DATA reads the data from a PIO

IORD_32DIRECT reads 32 bits from an adress (that can be a pio)

Ok. That means, if I use both commands for a PIO, they work similar. Right?

But wherefrom does IORD_ALTERA_AVALON_PIO_DATA know the width of the data?

I mean in the other case I specify 8, 16 or 32 Bit. And what does IORD_ALTERA_AVALON_PIO_DATA if the width is 33Bit for example?

from altera_avalon_pio_regs.h

# define IOADDR_ALTERA_AVALON_PIO_DATA(base) __IO_CALC_ADDRESS_NATIVE(base, 0)

# define IORD_ALTERA_AVALON_PIO_DATA(base) IORD(base, 0)

# define IOWR_ALTERA_AVALON_PIO_DATA(base, data) IOWR(base, 0, data)

# define IOADDR_ALTERA_AVALON_PIO_DIRECTION(base) __IO_CALC_ADDRESS_NATIVE(base, 1)

# define IORD_ALTERA_AVALON_PIO_DIRECTION(base) IORD(base, 1)

# define IOWR_ALTERA_AVALON_PIO_DIRECTION(base, data) IOWR(base, 1, data)

# define IOADDR_ALTERA_AVALON_PIO_IRQ_MASK(base) __IO_CALC_ADDRESS_NATIVE(base, 2)

# define IORD_ALTERA_AVALON_PIO_IRQ_MASK(base) IORD(base, 2)

# define IOWR_ALTERA_AVALON_PIO_IRQ_MASK(base, data) IOWR(base, 2, data)

# define IOADDR_ALTERA_AVALON_PIO_EDGE_CAP(base) __IO_CALC_ADDRESS_NATIVE(base, 3)

# define IORD_ALTERA_AVALON_PIO_EDGE_CAP(base) IORD(base, 3)

# define IOWR_ALTERA_AVALON_PIO_EDGE_CAP(base, data) IOWR(base, 3, data)

# define IOADDR_ALTERA_AVALON_PIO_SET_BIT(base) __IO_CALC_ADDRESS_NATIVE(base, 4)

# define IORD_ALTERA_AVALON_PIO_SET_BITS(base) IORD(base, 4)

# define IOWR_ALTERA_AVALON_PIO_SET_BITS(base, data) IOWR(base, 4, data)

# define IOADDR_ALTERA_AVALON_PIO_CLEAR_BITS(base) __IO_CALC_ADDRESS_NATIVE(base, 5)

# define IORD_ALTERA_AVALON_PIO_CLEAR_BITS(base) IORD(base, 5)

# define IOWR_ALTERA_AVALON_PIO_CLEAR_BITS(base, data) IOWR(base, 5, data)

sim, the register is always a 32 bits register

if your pio has a 1 bit width the other bits are going to be zero

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sim, the register is always a 32 bits register

if your pio has a 1 bit width the other bits are going to be zero

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That makes sense! Thank you.