S12 / MagniV Microcontrollers中的主题 Re: paging problem

paging problem

embitel — Thu, 12 Jan 2012 11:54:23 GMT

Hi everyone,

I am using code warrior 5.1 and MC9S12C64.

i want to use memory locations as below in rpm

lookup = READ_ONLY 0x102400 TO 0x103FFF;

   CLT_ROM,
   EGO_ROM,
   MAF_ROM,
   MAT_ROM    INTO lookup;

All table data into section lookup.

Please tell what are the changes i have to do in start12,c and prm file.

When i try to flash using PE usb multilink i get the error as follows

Error while writing to 0x102400 TO 0x103FFF to 0x102600.

INFORMATION: no memory at this location.

Thanks,

Embitel.

kef — Thu, 12 Jan 2012 13:25:47 GMT

Yes, there's no memory at 0x102400 in C64. Banked flash starts at 0x3C8000 in this device.

embitel — Thu, 12 Jan 2012 13:30:27 GMT

can't this be global address....

embitel — Thu, 12 Jan 2012 13:42:45 GMT

OR page 10 address

kef — Thu, 12 Jan 2012 17:17:12 GMT

No global addressing, no PPAGE 0x10, no external memory bus on S12C.

embitel — Thu, 12 Jan 2012 17:23:08 GMT

We have gcc compiled code which is working fine..

In memory.x file of gcc code the below line of code is used

lookup (rx) : ORIGIN = 0x102400, LENGTH = 0x1C00

We are trying to port to codewarrior compatible.

IF there is no PPAGE 0X10 || GLOBAL ADDRERSSING || EXTERNAL MEMORY...

then how gcc code is working fine.

Thanks,

Embitel.

kef — Thu, 12 Jan 2012 17:39:44 GMT

Either GCC ignores not existing page, or maybe this fake address extension is used to do separate S records files for code and eeprom data.