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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
19 years ago

opps!

provided that you are interested in rx only ....

//SPI RX

while (1) {

//if new byte arrived via SPI

if ((IORD_ALTERA_AVALON_SPI_STATUS(SPI_0_BASE) & ALTERA_AVALON_SPI_STATUS_RRDY_MSK) == 1){

//read the byte and print it to screen

printf("%x\n", (IORD_ALTERA_AVALON_SPI_RXDATA(SPI_0_BASE) & 0x0FF));

//clears the status register

IOWR_ALTERA_AVALON_SPI_STATUS(SPI_0_BASE, 0);

}

}

Thanx for the advice, but it did not work. Any other ideas?

Eric