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Altera_Forum's avatar
Altera_Forum
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15 years ago

NiosII SPI Core problem

Hi, all i use a SPI core in my nios system. when i used the function "alt_avalon_spi_command()" to sent a "who am i" command to the peripheral, it received no data. so i use signalTap to debu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

It's been a long time since I have used that core but I recommend looking at the control and status registers of the SPI core to make sure the TX hasn't overflowed or the RX hasn't underflowed. I forget the behavior but in those two cases the SPI component either stops moving data or it just loops the data back.... or something.... I forget.