CyU3PDmaChannelGetBuffer() return 68 problem

	comy posted on 24 Dec 2012 6:40 PM PST Senior Member 17 Forum Posts

Hi!

I want to write a wave to be transmited .The program is following

for (;;)

{
            for(i=0;i<256;i++)
               { result =128*(sin(p*i/255)+1);
             y=(uint16_t)result;
             x[i]=y;
               }
         status=CyU3PDmaChannelGetBuffer(&glChHandleBulkLp,&buffer_p,CYU3P_NO_WAIT);
         for(j=0;j<256;j++)
            {
                buffer_p.buffer[j]=(uint8_t)x[j];
             }
         if (status == CY_U3P_SUCCESS)
                 {

                     status = CyU3PDmaChannelCommitBuffer (&glChHandleBulkLp, buffer_p.count, 0);
                     if (status != CY_U3P_SUCCESS)
                     {
                         CyU3PDebugPrint (4, "CyU3PDmaChannelCommitBuffer failed, Error code = %d\n", status);}
                 }

}

When I run by steping, CyU3PDmaChannelGetBuffer() return 68. I don't know where is my problem

I do hope you can help me. Thank you!

Re: CyU3PDmaChannelGetBuffer() return 68 problem

	Subha posted on 01 Jan 2013 11:57 PM PST Cypress Employee 5 Forum Posts

Hi,

Error code 68 refers to CY_U3P_ERROR_NOT_CONFIGURED.This happens when the DMA channel has not been configured properly.Please post the code for DMA channel creation so that we can have a look at it.

Regards,

Subha

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CyU3PDmaChannelGetBuffer() return 68 problem

Re: CyU3PDmaChannelGetBuffer() return 68 problem