Hey Altera people
I am not familiar this but I managed to create my peripheral (vhdl) and integrated it in my design. The problem is when I try to use by C program the result obviously is not what I expect!!
My entity is :
entity convo isport(
clk : in std_logic;
wr_data : in std_logic_vector(31 downto 0);
cs : in std_logic;
wr_n : in std_logic;
addr : in std_logic;
clr_n : in std_logic;
rd_data : out std_logic_vector(31 downto 0));
end entity;
architecture behave of convo is
signal c1: std_logic_vector(31 downto 0);
begin
process(clk)
variable rg: std_logic_vector(1 downto 0):="00";
variable c: natural;
begin
if (clk 'event and clk='1') then
if cs ='1' and wr_n = '0' then
for i in 0 to 15 loop
c1(i+c)<=wr_data(i) xor rg(1);
c:=c+1;
c1(i+c)<=wr_data(i) xor rg(1) xor rg(0);
rg(1):=rg(0);
rg(0):=wr_data(i);
end loop;
end if;
end if;
end process;
rd_data<=c1;
end;
The wave form simulation is working 100% as the entity should.
My C code is
# include <stdio.h>#include "system.h"# include "altera_avalon_convo.h"
int k;
int main()
{
printf("Hello \n");
IOWR(CONVO_0_BASE,0,0x10);
k=IORD(CONVO_0_BASE,0);
printf("%d\n",k);
return 0;
} the console shows : Hello 16 (16=0x10 the input !!!)
your help is greatly appreciated
