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How to sned more than 32bits of data to HPS form FPGA custom ip

 

 

down votefavorite (http://stackoverflow.com/questions/43377035/read-data-from-the-fpga-ip-to-the-hps-in-altera-soc-fpga...

 

 

I am trying to access data from hps via Avalon memory mapping interface. I have put together system in qsys and assigned base address. In below code the I got the count value in 1st 32 bit std_logic_vector data to the HPS. But I didn't get the data in second 32 bit std_logic_vector  

 

 

 

library ieee; 

use ieee.std_logic_1164.all; 

USE ieee.numeric_std.ALL;  

use IEEE.STD_LOGIC_ARITH.ALL; 

use IEEE.STD_LOGIC_UNSIGNED.ALL; 

 

 

entity en is  

GENERIC( 

max_pulse : INTEGER := 800; --pulses per revolution 

res_bits : INTEGER := 16); --max count 2^res_bits 

port( 

--avlon slave inputsa and outputs 

clk : in std_logic; 

reset : in std_logic; 

avs_s0_address : IN STD_LOGIC; 

avs_s0_read : IN STD_LOGIC; 

avs_s0_write : IN STD_LOGIC; 

avs_s0_readdata : OUT STD_LOGIC_VECTOR(31 DOWNTO 0); 

avs_s0_writedata : IN STD_LOGIC_VECTOR(31 DOWNTO 0) 

 

 

 ); 

 

end en;  

 

 

architecture behavior of encorder is 

 

 

----- avlon read 

PROCESS(avs_s0_read) 

BEGIN 

IF avs_s0_read = '1' THEN 

CASE(avs_s0_address) IS 

WHEN '0' => avs_s0_readdata <= x"0f0ff0f0"; 

WHEN '1' => avs_s0_readdata <= x"0f0fffff"; 

WHEN others => avs_s0_readdata <= x"00000000"; 

END CASE; 

ELSE avs_s0_readdata <= x"00000000"; 

END IF; 

END PROCESS; 

The way I access data from the HPS is as below, 

 

# define COUNT 0xFF200020 //Avalon base Addrs +counter base Addrsint 

main(void){  

volatile int * Count_ptr = (int *) COUNT; 

unsigned int cnt, ex; 

while(1) {  

cnt = *(Count_ptr); 

ex = *(Count_ptr+1); 

printf("count = %d \n",cnt); 

printf("count = %d \n",ex ); 

 

 

 

0down votefavorite (http://stackoverflow.com/questions/43377035/read-data-from-the-fpga-ip-to-the-hps-in-altera-soc-fpga...

 

 

I am trying to access data from hps via Avalon memory mapping interface. I have put together system in qsys and assigned base address. In below code the I got the count value in 1st 32 bit std_logic_vector (count) data to the HPS. But I didn't get the data in second 32 bit std_logic_vector (count_n) 

 

 

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