C167CS - can't access XRAM @0xC000

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Read-Only Author Hari Bahra Posted 2-Dec-2004 10:01 Toolset C166	C167CS - can't access XRAM @0xC000 Hari Bahra Can any one tell me how to access the XRAM at address 0xC000 on the C167CS. I have :- - ticked 'use on-chip xram' - added XRAM class in linker file is as follows :- CLASSES (ICODE(000000h), IDATA0(00F600h), SDATA(00E000h-00E7FFh), SDATA0(00E000h-00E7FFh), XRAM(00C000h-00D7FFh), NCODE(010000h-013FFFh), .... etc - used the RENAMECLASSE control at the top of my 'Debug.c' file and allocated some XRAM memory as follows #pragma RENAMECLASS(SDATA = XRAM) #pragma NOINIT static int sdata Temp[20]; The resulting .m66 file looks encouraging ... START STOP LENGTH TYPE RTYP ALIGN TGR GRP COMB CLASS SECTION NAME ===================================================================================== 00C000H 00C027H 000028H DATA REL WORD --- 2 PUBL XRAM ?SD?DEBUG But it doesn't work - the XRAM is not accessible. Any ideas anyone ?? Regards Hari

Read-Only Author Walt Conley Posted 2-Dec-2004 10:58 Toolset C166	RE: C167CS - can't access XRAM @0xC000 Walt Conley Have you tried this? http://www.keil.com/support/docs/1621.htm

Read-Only Author Hari Bahra Posted 3-Dec-2004 09:43 Toolset C166	RE: C167CS - can't access XRAM @0xC000 Hari Bahra Thanks for responding. Yes I have enabled XPEN in SYSCON register. I don't have any trouble with XRAM at addres 0xE000. I only have trouble accessing the XRAM at 0xC000.

Read-Only Author Brad Holeman Posted 6-Dec-2004 11:40 Toolset C166	RE: C167CS - can't access XRAM @0xC000 Brad Holeman I would double check to make sure that you are indeed enabling all of XRAM. MOV XPERCON,#0C03H ; Enable CAN 1 and CAN 2 Xbus peripherals ; Enable XRAM 2 KByte memory ; Enable XRAM 6 KByte memory NOP NOP MOV SYSCON,#8184H ; Stack size = 512 words ; Internal rom starts at 00'0000 ; Segmentation enabled ; Internal rom disabled ; BHE pin enabled ; Clock out pin enabled ; WR is write low, BHE is write high ; Xbus peripherals are enabled ; Xbus accesses are not visible on external bus ; Xbus peripherals not accessable on external bus Additionally try this in your linker file, SDATA0 (C000H-D7FFH, E000H-E7FFH)

Read-Only Author Brad Holeman Posted 6-Dec-2004 13:32 Toolset C166	RE: C167CS - can't access XRAM @0xC000 Brad Holeman Hari, The above works for sure because we are using with our C167CS.

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