topic Re: MPC5744P DMA bus error to get data from source in MPC5xxx

MPC5744P DMA bus error to get data from source

edwardlu666 — Fri, 04 May 2018 09:40:27 GMT

Hello:

Now I debug the DMA module of MPC5744P.BUT BUS ...

DMA reading occurs the bus error.And FAE from Shanghai-Office tells me it would not be the permitted to access the bus for DMA. (Why source bus error?)

here is my debug sight from LAUTERBACH

All AIPS opened for no-supervisor mode:

Could any one help me?

thanks

Re: MPC5744P DMA bus error to get data from source

edwardlu666 — Fri, 04 May 2018 09:42:49 GMT

Buffer is located in the RAM so does this matters?or can some of the register to be set to correct the error?

Re: MPC5744P DMA bus error to get data from source

edwardlu666 — Mon, 07 May 2018 07:22:04 GMT

question resolved by setting AIPS and SMPU register to make the ram accessable.the code should be in start up,but in my project,transform the code in the later stage... not reasonable but can work

thanks all