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FPGA Interrupts on MityDSP-Pro
Added by Thomas Catalino almost 13 years ago
(posted on behalf of a customer)
I am trying to get some documentation on the FPGA/DSP interrupts for the MityDSP-Pro. In the MityDSP-Pro data sheet "MityDSP-PRO Data Sheet" at http://www.mitydsp.com/images/upload/File/MityDSPProSpec(1).pdf, Figure 1 on page 2 shows an "IRQ" arrow going from the FPGA to the DSP. Also, the last sentence at the bottom of page 3 of the same document says "The MityDSP-Pro also includes lines between the FPGA and the MityDSP for the purposes of generating interrupt signals." The problem is that I can't find any documentation on these interrupts such as pins on the FPGA and matching interrupts lines (gpio or other?) on the DSP side. Actually, I can't find any documentation in general (interrupts or other) on the FPGA/DSP interface. Am I missing some documentation or something? This is crucial for my team's development efforts on the FPGA and DSP.
Replies (2)
RE: FPGA Interrupts on MityDSP-Pro - Added by Michael Williamson almost 13 years ago
There are 2 lines connected between the FPGA and the DSP intended for interrupt use. On the DSP, 2 GPIO pins are used for interrupt handling (GP [4] and GP [5]). On the FPGA, for example in the MityDSP-Pro.vhd boot image top level, the corresponding pins are called "o_dsp_int4 and o_dsp_int5".
I posted some additional information on the MityDSP-PRO Interrupt Routing page and added some slides from a training course about them, if that helps. Let me know if you need further clarification.
