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Honored Contributor
Honored Contributorusing spi core
I want to use the spi core for adc peripheral AD9253. It has bidirectional SDIO. but spi core in nios has miso and mosi. so how do i tackle this. i want to read and write to the adc registers.
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- A simple solution is driving SDIO in open collector mode using a tristate i/o buffer and a pull-up resistor. MOSI is connected to the active low buffer enable port, while the i/o buffer input is hardwired to gnd. MISO is connected to the same i/o pin. This way you simply put ones in the spi tx register for the bits you are supposed to receive. --- Quote End --- Hello, sherindeena! Did You try to make it this way? Here are another replies to this question: http://www.alteraforum.com/forum/showthread.php?t=26838 http://www.alteraforum.com/forum/showthread.php?t=38228 Which one is correct? I am interested because I am about to make the similar connection.
