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Altera_Forum
Honored Contributor
Honored ContributorIORD_ALTERA_AVALON_PIO_DATA to slow?
Hi, I'm trying to capture samples from an A/D Converter and streaming them onto a PC via an ethernet connection. I've extended the triple speed ethernet design example from the Nios II v9.1 instal...
Altera_ForumHonored Contributor
Honored ContributorI use Nichestack, too. It uses two high priority interrupts to manage ethernet rx and protocol: this is leading to the delay you are experiencing.
Nichestack also includes some critical pieces of code where isr are temporarily disabled, so you can't attain such a precise timing as you require, even if your sampling is made through a highest priority timer interrupt. the only way to perform precise sampling at f>100kHz is to make it with hardware, dma or similar.
