Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Interrupt-driven SPI?

Hi. I'm using uC/OS-II (version 2.77) on Nios II platform using Quartus 6.0, Service Pack 1. The SPI included provides a HAL interface that is pretty much limited to the alt_avalon_spi_com...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Thanks. I forgot to mention that I am also doing this in my SPI access function:

IOWR_ALTERA_AVALON_SPI_CONTROL( SPI_BUS_IF_BASE,

ALTERA_AVALON_SPI_CONTROL_SSO_MSK ||

ALTERA_AVALON_SPI_CONTROL_IRRDY_MSK );

The inclusion of the ALTERA_AVALON_SPI_CONTROL_IRRDY_MSK seems to make my code always read 0xFF from the RxData register.

Thoughts?