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Altera_Forum
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10 years ago

NIOS II SPI communication

Hi All! I've a problem with Nios SPI communication. I studied "Embedded Peripherals IP User Guide" but I didn't understand how to use alt_avalon_spi_command() function. I understood that an Avalon...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

The difference should be clear from the description in the user guide? alt_avalon_spi_command() performs the sequence of actions described in the manual, while IOWR_ALTERA_AVALON_SPI_TXDATA() just writes the TXDATA register.

You can read the source to the alt_avalon_spi_command() function and see how it uses IOWR_ALTERA_AVALON_SPI_TXDATA() and everything else that it does to gain better understanding.

There is also an example use of the function here:

http://www.alterawiki.com/wiki/spi_core