2 Replies Latest reply on Feb 3, 2016 7:50 PM by jake.janovetz

    CyU3PDeviceInit and defaults

    jake.janovetz

      Has anyone gotten CyU3PDeviceInit to work with a parameter other than NULL?

         

      The PCB has a 19.2 MHz oscillator and does not have the 32.768 kHz crystal.

         

      With CyU3PDeviceInit(NULL), our device boots. But the defaults seem to be different than those described in the API Guide.

         

      The API Guide says the defaults should be: CPU divider = 2, DMA divider = 2, MMIO divider = 2, setSysClk400 = CyFalse, useStandbyClk
      = CyTrue. And that this would run the GPIF at 96 MHz. but we measure 100.8 MHz.

         

      Additionally, if we try to initialize with these defaults:

         

          clk_cfg.setSysClk400  = CyFalse;
          clk_cfg.useStandbyClk = CyTrue;
          clk_cfg.cpuClkDiv     = 2;
          clk_cfg.dmaClkDiv     = 2;
          clk_cfg.mmioClkDiv    = 2;
          status = CyU3PDeviceInit(&clk_cfg);

         

      The device will NOT boot.

         

      Are we missing something here?