writing information into avalon slave in c

[Altera_Forum]

Hi, 

 I have a NIOS II which is connected to a vga component with avalon memory mapped slave.  In the VHDL entity, i have address, writedata, readdata, and chip select. the address base of the avalon memory mapped slave is 0x3008.   I am not sure how to write information into the memory mapped slave. The address is used so i can write data into different signals.   So far i have something like this in c: # define x (char *) 0x3008  main(){ while(1) *x=0x0F; // whatever values i need to pass. }

[Altera_Forum]

From NIOS you just treat it as if it is any other bit of memory and the processor will take care of the signalling (hence they are called memory-mapped). 

 There are handy functions provided in the NIOS BSP that are useful when writing to slave devices such as: IOWR_32DIRECT(<base address>,<offset in bytes>,<32bit data>); IORD_32DIRECT(<base address>,<offset in bytes>); And similar ones for 8bit and 16 bit data.  Alternative you can do something like:  int main(){  char* x = 0x3008;  *x = 0x0F; }

[Altera_Forum]

--- Quote Start ---  From NIOS you just treat it as if it is any other bit of memory and the processor will take care of the signalling (hence they are called memory-mapped).  There are handy functions provided in the NIOS BSP that are useful when writing to slave devices such as: IOWR_32DIRECT(<base address>,<offset in bytes>,<32bit data>); IORD_32DIRECT(<base address>,<offset in bytes>); And similar ones for 8bit and 16 bit data.  Alternative you can do something like:  int main(){  char* x = 0x3008;  *x = 0x0F; }  --- Quote End ---     Thanks i got it working. Another question i have has regards to the altera monitor program. Has anyone used it?  I'm trying to use the sleep function included from the unistd.h. However when i compile it tells me there is an undefined reference to sleep(). any ideas?  ps. usleep() gives the same error