Want to access single port ram using python in HPS ;

Hi ,

Please try to use the general linux commands using wrapper os.system() in python.

https://superuser.com/questions/164960/how-do-i-dump-physical-memory-in-linux

and let us know the results.

entity pmuga_01 is
	port (
			CLOCK_50 :  in  std_logic;
			AUX_LEDO :  out std_logic;
			DAT_LED  :  out std_logic_vector(3 downto 0);
			LED      :  out std_logic
			);
end entity;
			
architecture Behavioral of pmuga_01 is
 
	signal counter : integer  := 0;
	signal clk_1Hz : std_logic;
	signal aux 		: std_logic;
	
	signal data 	: std_logic_vector(3 downto 0);
	signal addr		: std_logic_vector(7 downto 0);
	signal output  : std_logic_vector(3 downto 0);
	signal wren 	: std_logic;
 
	component pcycle
		port(
				address : in std_logic_vector(7 downto 0);		
				clock   : in std_logic;
				data 	  : in std_logic_vector(3 downto 0);
				wren 	  : in std_logic;
				q 		  : out std_logic_vector(3 downto 0)
		);
	end component;
	
begin
	
		
	ram : pcycle
	PORT MAP (
		address => addr,
		clock => clock_50,
		data => data,
		wren => wren,
		q  => output
	);
	
	process(CLOCK_50) is 
	begin
		if rising_edge(CLOCK_50) then
			if counter < 25000000 then
				counter <= counter + 1;
			else
				clk_1Hz <= not clk_1Hz;
				counter <= 0;
			end if;
		end if;
		
	end process;	
	
	LED <= clk_1Hz;
	AUX <= clk_1Hz; 
	
	process(AUX) is
	begin
		if clk_1Hz = '1' then
			AUX_LEDO <= '0';
			wren <= '1';
			data <= "1111";                        -- data 1111 is stored in addr 00000000
			addr <= "00000000";
			
		
		else
			AUX_LEDO <= '1';
			wren <= '0';
			addr <= "00000000";            
			DAT_LED <= output;
		
	

above VHDL code used to store data in ram which I created using ip integrator...

from mmap import mmap
 
MAPSIZE = 10
offset_mem = 0xFFFF0000
 
with open("/dev/mem", "r+b") as f:
        mem = mmap(f.fileno(), MAPSIZE, offset=offset_mem)
        packed_reg = mem[:]
        print(packed_reg.encode('hex'))
 
 

this python code is used to collect data using python. i get address of on chip memory as 0xFFFF0000 from this link. https://www.intel.com/content/www/us/en/programmable/hps/cyclone-v/hps.html#topic/sfo1410068453374.html

but the output of python doesn't shows the correct data. at positio 0xFFFF0000

Hi

Please let us know what is the output obtained by the code at position 0xFFFF0000.

Regards

Anil