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Altera_Forum's avatar
Altera_Forum
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19 years ago

SPI RX problems

Hi I am trying to receive data via SPI on the Nios II using a Cyclone II. The Nios is the slave and the SPI master transmits data at 2MHz. I have tested transmitting data from the Nios ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

You problem is wrong condition in "if" statement, it sould be (IORD_ALTERA_AVALON_SPI_STATUS(SPI_0_BASE) &ALTERA_AVALON_SPI_STATUS_RRDY_MSK ) == ALTERA_AVALON_SPI_STATUS_RRDY_MSK

Operator & is bitwise, therefore you condition is never equal 1.