Lpc2000

Perhaps it is because these are 16-bit registers?

Try 
 #define SSPCR0         (*((volatile unsigned short *) 0xE0068000))



--- In lpc2000@yahoogroups.com, "dsidlauskas1" <dsidlauskas@w...> 
wrote:
> 
> This one instruction program creates a Data Abort when setting an 
SSP
> Register. Anyone know what's going on?
> 
> 
> int main (void)
> {
> 
> #define SSPCR0         (*((volatile unsigned char *) 0xE0068000))
> 
> SSPCR0   = 0x3f; 
> }
> 
> The assembly code looks OK and the register address matches the
> documentation.
> 
>     26:         SSPCR0   = 0x3f;        // SPI Mode, 16 bit frame 
> 0x000006B2  213F      MOV       R1,#0x3F
> 0x000006B4  4803      LDR       R0,[PC,#0x000C]
> 0x000006B6  7001      STRB      R1,[R0,#0x00]
> 
> Thanks for your help.
> 
> Dave S.