fx3 DMA Error

[Anonymous]

Hello  everyone

       

Dma transfer meet an error  when the transfer size is more than 0x300,Use CyU3PDmaChannelGetStatus to get the DMA statue and the return status is CY_U3P_DMA_ERROR.what can lead the error ,and how can I solve it

[Anonymous]

Ayi,

   

Please change the starting piece of code in the main function as shown below, if you are using GPIF II in 32-bit mode.

   

CyU3PIoMatrixConfig_t io_cfg;
    CyU3PReturnStatus_t status = CY_U3P_SUCCESS;
    CyU3PSysClockConfig_t clkCfg = {
            CyTrue,
            2, 2, 2,
            CyFalse,
            CY_U3P_SYS_CLK
    };

    /* Initialize the device */
    status = CyU3PDeviceInit (&clkCfg);
    if (status != CY_U3P_SUCCESS)
    {
        goto handle_fatal_error;
    }

    /* Initialize the caches. Enable instruction cache and keep data cache disabled.
     * The data cache is useful only when there is a large amount of CPU based memory
     * accesses. When used in simple cases, it can decrease performance due to large
     * number of cache flushes and cleans and also it adds to the complexity of the
     * code. */

   

Let me know the result after doing this modification.

   

Thanks,

   

sai kirshna.

[Anonymous]

 Hello RSKV

       

Thank you very much,The problem has been solved with your suggestion.The issue confused me a week.I am so hanppy the moment of solved the problem. I have notivecd the clock (status = CyU3PDeviceInit (NULL);)last week ,I know you add a parameter in the CyU3PSysClockConfig_t from SDK V1.1.1 , I also went to configure the CyU3PSysClockConfig_t to replease the NULL.But I failed ,becouse I don't know how to configure the other parameter expected setSysClk400 and all the examples are configuration with NULL.So I thought the NULL is the corrected configuration.So I suggest you add the configuration infomation in the examples  with the new release SDK ,maybe others will meet the same issue. 

       

Thanks

   

Best regards