Honored Contributor
Honored ContributorUpdated:
I don't know what the different on my old board vs new board. The new board seems to work little better. Nios C code: volatile unsigned long w, r; unsigned int i; for (i=5; i<20; i++) { IOWR_32DIRECT(SDRAM_BASE, i*4, i); printf("Write: %x\n", i); usleep(1000); r = IORD_32DIRECT(SDRAM_BASE, i*4); printf(" Read: %x\n\n", r); } // ****************** New board output: nios2-terminal: connected to hardware target using JTAG UART on cable nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0 nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate) Write: 5 Read: 5 Write: 6 Read: 6 Write: 7 Read: 7 Write: 8 Read: 8 Write: 9 Read: 9 Write: a Read: a Write: b Read: b Write: c Read: c Write: d Read: d Write: e Read: e Write: f Read: f Write: 10 Read: 10 Write: 11 Read: 11 Write: 12 Read: 12 Write: 13 Read: 13 Old board output: nios2-terminal: connected to hardware target using JTAG UART on cable nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0 nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate) Write: 5 Read: 0 Write: 6 Read: 0 Write: 7 Read: 0 Write: 8 Read: 0 Write: 9 Read: 0 Write: a Read: 0 Write: b Read: 0 Write: c Read: 0 Write: d Read: 0 Write: e Read: 0 Write: f Read: 0 Write: 10 Read: 0 Write: 11 Read: 0 Write: 12 Read: 0 Write: 13 Read: 0 ~Sean
