Posted on April 03, 2007 at 16:00 Dear Madam/Sir,
Im porting MicroC/OS-II and some applications onto ST10F276 uC.
Im using Hitex (DProbeST10) emulator for emulating the ST10F276uC.
Compiler used is Keil uVision3.
Problem Description
In StartA66,
1) Im setting the XPERCON register with value 0x685H (Enabling bits : XMISCEN,XI2CEN,XASCEN,XRAM1 & XCAN1)
...
XPERCON DEFR 0F024H
EXTR #1
MOV XPERCON,#V_XPERCON ;V_XPERCON EQU 0000$0110$1000$0101B
...
2) After setting the XPEN bit in SYSCON, the contents of XPERCON is
copied into XPEREMU
....
XPEREMU EQU 0EB7EH
XPEREMU EQU 0EB7EH
MOV R1,XPEREMU
MOV R2,#685H ;Same value written into XPERCON earlier
MOV [R1],R2
....
The project is then compiled in Keil uVision3 and the executable generated
is downloaded using the Emulator Application GUI(HiTOP) into the Emulator's internal emulation memory.
Following are the points noted
1) In Emulator GUI(HiTOP) disassembler, the instuction MOV R1,XPEREMU is
shown as:
MOV R1,DPP3:0x2B7E
(DPP3 value is 3)
But right after stepping this instruction, the GPR R1 is having a
value of 0xFF8C instead of being 0xEB7E
Also after instruction MOV [R1],R2 ; the XPEREMU register value
is shown as 0xAE6 instead of being 0x685
From this point onwards, the value of XPEREMU keeps changing with
random values in each step. But interesting to say, when i do a reset
then the XPEREMU shows its value as 0x685 correctly. Is this an
expected behaviour ? How can i confirm that the XBUS peripherals are
initialized correctly?
2) I was told by my Hitex dealor that the XPERCON register does not exist
within the bondout chip and that i will have to use the XPEREMU
register instead for successful emulation of XBUS peripherals.
The XPERCON register is not accessible and is always having a value 0.
Note: In the memory mapping window of both Keil and Emulator GUI, iam mapping the range 0xC000 - 0xFFFF. im not sure whether this mapping is required and correct.
Please help me with your valuable suggestions.
Im also uploading a copy of the StartA66 file.
Thanks in advance,
Regards
Rajiv
________________
Attachments : Start167.a66 :
https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0NW&d=%2Fa%2F0X0000000bYF%2FFPUj74jcIciP_Sbj0PHzszF47HJjTYfE2KS1x_1nyPU&asPdf=false
