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Altera_Forum's avatar
Altera_Forum
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11 years ago

system console, external memory, multiple masters

Hi guys Im fairly new here. Im working with a cyclone V GX board and have used qsys to add a memory controller in my nios code to control some lpddr memory on the eval board. Im u...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hi Dave

I tried a quick test on the memory offsets in system console. Was hoping that i could write master 0 at addr x4 and then read the same data back at master 1 addr x20000004, but the memory content doesnt line up:

% set extMem[ lindex [ get_service_paths master ] 0 ]

/devices/5CGTFD5(C5|F5)|5CGXBC5C(6|7)|..@1#USB-1/(link)/JTAG/sldfabric.node_1/phy_0/mem_if_lpddr2_emif_0_dmaster.master

% open_service master $extMem

% master_read_32 $extMem 0x00000004 10

0x818001c0 0x019e0000 0x818021c0 0x019e0000 0x818041c0 0x019e0000 0x818061c0 0x019e0000 0x818003c0 0x019e0000

% close_service master $extMem

% set myNios[ lindex [ get_service_paths master ] 1 ]

/devices/5CGTFD5(C5|F5)|5CGXBC5C(6|7)|..@1#USB-1/(link)/JTAG/sldfabric.node_2/nios2_qsys_0.data_master

% open_service master $myNios

% master_read_32 $myNios0x20000004 10

0xdfc00015 0xd8400215 0xd8800315 0xd8c00415 0xd9000515 0xd9400615 0xd9800715 0xd9c00815 0x000b307a 0xda000915

% close_service master $myNios

Ill try adding the jtag to avalon mm master in there and report back

thanks for all your help!