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imx6 eim muxed 16bits  communication

Question asked by ma yiming on May 31, 2015
Latest reply on Jun 1, 2015 by Yuri Muhin

Hello

I'm trying to communicate the with a fpga chip over the EIM bus on an i.MX6.

 

It uses the following signals:

CS0

OE

RW

LBA

EB0/EB1

ADDR/DATA[0-15]

 

It doesn't have the WAIT pin connected and uses a external chip to latch addresses.

 

My configuration:

EIM_CS0GCR1: 0x07f1003f

EIM_CS0GCR2: 0x00001002

EIM_CS0RCR1: 0x08785000

EIM_CS0RCR2: 0x00000028

EIM_CS0WCR1: 0x88e28800

EIM_CS0WCR2: 0x00000000

 

 

 

at uboot

  when i  use md 0x08000000,then 

then value is 0xffffffff

use  mw.l 0x08000000 0x1223  8 

then md 0x08000000  then value still  is  0xffffffff

 

anyone  can help me

 

 

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