Interfacing EFB (UFM) with Mico8 Wishbone

Thanks
I actually studied that document already, but I am still not able to 
establish communication. That is why I ask if someone can provide me a 
working reference code either in C or assembler.
But maybe you are right, I have to analyze the wishbone signals with an 
logic analyzer to see whether I meet the timings exactly as described in 
this document.

Sincerely

Thanks Lattice User
My Assembler Code in Mico8 looks like this.
Here I try to read the device ID as you suggested in the first post.

When I read back the Device ID into register r17-20 I just got all zeros 
in it. I guess I have to analyse with a Logic Analyzer to see what is 
wrong.

What is your opinion on this code

1

  movi r15, FLASH       ;Address of peripherial

2

  movi r11, CFGCR       ;Port address Control Register 0x70

3

  movi r13, CFGTXDR   ;Port address Transmit Register 0x71

4

  movi r9, CFGRXDR   ;Port address Receive Register 0x73

5

6

  movi r16, READ_DEVICE_ID ;Define Command 0xE0

7

8

  movi r12, ZERO_OP   ;Null Operand 0x00

9

  movi r10, START_CMD ;Start Byte 0x80

10

  movi r8, END_CMD ;Start Byte 0x00

11

12

;Starte Kommando

13

  exporti r10,r11   ;Assert CFGCR[WBCE]

14

;Send Command

15

  exporti r16,r13 ;Send Command READ_DEVICE_ID

16

  exporti r12,r13   ;Send 0x00 operand 3x

17

  exporti r12,r13

18

  exporti r12,r13

19

;Read Device ID

20

  importi r17,r9

21

  importi r18,r9

22

  importi r19,r9

23

  importi r20,r9

24

;End Kommando

25

  exporti r8,r11   ;De-assert CFGCR[WBCE]

Yes I have r15 and r14 as address register.
I actually dont know what memory model I use, but it is the Reference 
Design RD1026 configured to 32 General Purpose registers.

I analyzed the Wishbone signals and surprise: the UFM block actually 
respond to the Read Device ID request. However, due to some timing 
issues the Mico8 importi implementation somehow is not able to capture 
the response from the UFM.

My version of Mico8 is 3.1. I think I might have to update it to 3.15 as 
I infer by your comments. This might help.

Ok see you later, maybe I can do it by Friday.

Sincerely