Can I set the parameter of the HPI EDMA?
Can I set the HPI EDMA transfer from 1-dimension to 2-dimension(any
other mode) When the host read data from the DSP via the HPI?
Problem about HPI's EDMA transfer
Started by ●July 18, 2006
Reply by ●July 18, 20062006-07-18
Chen Yang-
> Can I set the parameter of the HPI EDMA?
> Can I set the HPI EDMA transfer from 1-dimension to 2-dimension(any
> other mode) When the host read data from the DSP via the HPI?
For HPI DMA transfers, only priority can be controlled. See section 2.2.1.2, HPI/PCI
Transfer Requests, in this document:
http://focus.ti.com/lit/ug/spru234b/spru234b.pdf
It notes that HPI/PCI access automatically generates DMA transfer requests which are
"invisible" and submitted with a "high priority". Haha, mysterious TI speak :-) But
sections 3.4 and 4.5 talk about setting HPI DMA priority... have fun.
Otherwise, the only thing you can control / monitor is timing of HPI DMA, burst
length, and HRDY signal.
-Jeff
> Can I set the parameter of the HPI EDMA?
> Can I set the HPI EDMA transfer from 1-dimension to 2-dimension(any
> other mode) When the host read data from the DSP via the HPI?
For HPI DMA transfers, only priority can be controlled. See section 2.2.1.2, HPI/PCI
Transfer Requests, in this document:
http://focus.ti.com/lit/ug/spru234b/spru234b.pdf
It notes that HPI/PCI access automatically generates DMA transfer requests which are
"invisible" and submitted with a "high priority". Haha, mysterious TI speak :-) But
sections 3.4 and 4.5 talk about setting HPI DMA priority... have fun.
Otherwise, the only thing you can control / monitor is timing of HPI DMA, burst
length, and HRDY signal.
-Jeff
