Want to access single port ram using python in HPS ;

[PShar30]

hi.

1. I have successfully booted Armstrong Linux in HPS of cyclone V ,
2. made a simple program for ram functionality .

I want to access ram data stored in address "00" using python in HPS.

Please provide me a sample/eg code. or documentation for the same.

Thank you.

[AnilErinch_A_Intel]

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.

[PShar30]

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

[AnilErinch_A_Intel]

Hi

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

Regards

Anil