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Altera_Forum
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18 years ago

Problem PIO

Hello to all, I'm new in FPGA and I have a Cyclone II and I made a design with a Nios II. I just want to drive a component (LM629) and I have to send et receive data. I created a tri sta...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Did you check the header file altera_avalon_pio_regs.h? There are several defines there that can be of interest:

# 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 ALTERA_AVALON_PIO_DIRECTION_INPUT 0

# define ALTERA_AVALON_PIO_DIRECTION_OUTPUT 1