NeeD Help in My CIP ?

[adam_lo]

Hello

I create in XPS program Custom ip that add two number and It work correct and the result appeared in hyper terminal .
But when replace add to multiplier two no. the result in hyper terminal always be zero ?

This code I add after beginning in arch. in user logic
mult : process (slv_reg0,slv_reg1,slv_reg2)

variable r1,r2 : std_logic_vector(0 to 7);
begin
r1:=slv_reg0(0 to 7);
r2:=slv_reg1(0 to 7);
slv_reg2(0 to 15)<= r1 *r2;
end process mult;
reg_out <=slv_reg2(0 to 15);

and make the reg_out external port .

Plz ,help me to overcome this problem.

 

[TrickyDicky]

are you sure one of the operands isnt 0?

 

[adam_lo]

are you sure one of the operands isnt 0?

yes of course,
in c code

MYIP_mWriteSlaveReg0(XPAR_MYIP_0_BASEADDR,0,12);
MYIP_mWriteSlaveReg1(XPAR_MYIP_0_BASEADDR,1,3);
res=MYIP_mReadSlaveReg2(XPAR_MYIP_0_BASEADDR,2);
xil_printf("%d",res);

 

[TrickyDicky]

that doesnt mean anything. Are you sure the values are being set correctly in the registers?

 

[adam_lo]

that doesnt mean anything. Are you sure the values are being set correctly in the registers?

Thanks TrickyDicky for your reply
Yes,
When I read the register the value printed correct
Are you mean that?

res=MYIP_mReadSlaveReg0(XPAR_MYIP_0_BASEADDR,0);
xil_printf("%d",res);

 

[TrickyDicky]

have you testbenched this code (ie. run a simulation?)

 

[adam_lo]

No , I don't Know that