I am now doing a project, can use samsung exynos4412 EBI interface implementation and the fpga high-speed data transmission, data through dma transmission of fpga to arm, the use of fpga hung on SROM bank0 circuit structure, in the process of testing the bus without any signal, every time transmission serial print manipulated - pl330 manipulated - pl330.0: Reset the Channel CS - 20000-0 f the FTC - 40000, in the test by memory to memory dma transfer time is can test is successful, but the test by the EBI addresses to internal MEM transmission, the buffer is empty, don't know if you have done similar project, hope to be able to get everybody to help, the kernel for 3.0.15, before s5pv210 board adopt this way of communication is no problem, after changed the A9 not line,,,

CodePudding user response:

We have used similar processor has done similar project?

CodePudding user response:

Directly to the EBI interval of address, speaking, reading and writing, should have waveform, oscilloscope for you measure

CodePudding user response:

Reading and writing can be a signal directly, but for bulk transmission errors when using the dma

CodePudding user response:

The building Lord, I want to ask, how to use EBI is exynos4412? EBI use interface is not the general GPIO port is? I look from the schematic diagram, BEBI interface is MP05_0 like that, unlike the GPIO ah,