FX3 (USB 3.0) Port Status

#include "cyu3system.h"
#include "cyu3os.h"
#include "cyu3dma.h"

// loads default configuration macros
#include "ztex-conf.c"

CyU3PDmaChannel dma_out_handle, dma_in_handle;

/* Define endpoints 2 and 4. Both belong to interface 0 (in/out are seen from the host)
 * Burst size is 1 and DMA size is 2x1K. */
#undef EP_SETUP
#define EP_SETUP \
    INTERFACE(0, \
        EP_BULK(4, OUT, 1, /* direction as seen from the host */ \
            DMA(dma_in_handle, CY_U3P_DMA_TYPE_MANUAL_IN, 1, 2, CY_U3P_CPU_SOCKET_CONS, \
                CB(0,0) \
            ) \
        ) \
        EP_BULK(2, IN, 1, \
            DMA(dma_out_handle, CY_U3P_DMA_TYPE_MANUAL_OUT, 1, 2, CY_U3P_CPU_SOCKET_PROD, ) \
        ) \
    )

#undef ZTEX_PRODUCT_STRING 
#define ZTEX_PRODUCT_STRING "ucecho for EZ-USB FX3"

#include "ztex.c"       

void usb_start() {
    // start USB transfers as soon cable is connected
    ZTEX_REC(CyU3PDmaChannelSetXfer (&dma_in_handle, 0));
    ZTEX_REC(CyU3PDmaChannelSetXfer (&dma_out_handle, 0));
}

void usb_stop() {
    // nothing required here
}

void run () {
    CyU3PDmaBuffer_t inbuf, outbuf;
    CyU3PReturnStatus_t status;
    uint32_t i;

    ztex_log ( "ucecho for EZ-USB devices" );

    while (1) {
        if (ztex_usb_is_connected) {
            /* Wait for receiving a buffer from the producer socket (OUT endpoint). The call
             * will fail if there was an error or if the USB connection was reset / disconnected.
             * In case of error invoke the error handler and in case of reset / disconnection,
             * ztex_usb_is_connected will be 0; continue to beginning of the loop. */
            status = CyU3PDmaChannelGetBuffer (&dma_in_handle, &inbuf, CYU3P_WAIT_FOREVER);
            // ZTEX_LOG("EC=%d,  Read %d bytes", status, inbuf.count);
            if (!ztex_usb_is_connected || status==CY_U3P_ERROR_TIMEOUT) continue;
            ZTEX_REC_CONT(status);

            /* Wait for a free buffer to transmit the received data. 
             * The failure cases are same as above. */
            status = CyU3PDmaChannelGetBuffer (&dma_out_handle, &outbuf, CYU3P_WAIT_FOREVER);
            if (!ztex_usb_is_connected || status==CY_U3P_ERROR_TIMEOUT) continue;
            ZTEX_REC(status);

            /* Convert the data from the producer channel to the consumer channel. 
             * The inbuf.count holds the amount of valid data received. */
            CyU3PMemCopy (outbuf.buffer, inbuf.buffer, inbuf.count);
            for (i=0; i<inbuf.count; i++ )
                outbuf.buffer[i] = inbuf.buffer[i]>='a' && inbuf.buffer[i]<='z' ? 
                                   inbuf.buffer[i] - 32 : inbuf.buffer[i];

            /* Now discard the data from the producer channel so that the buffer is made
             * available to receive more data. */
            status = CyU3PDmaChannelDiscardBuffer (&dma_in_handle);
            if (!ztex_usb_is_connected) continue;
            ZTEX_REC(status);

            /* Commit the received data to the consumer pipe so that the data can be
             * transmitted back to the USB host. Since the same data is sent back, the
             * count shall be same as received and the status field of the call shall
             * be 0 for default use case. */
            status = CyU3PDmaChannelCommitBuffer (&dma_out_handle, inbuf.count, 0);
            // ZTEX_LOG("EC=%d,  Sent %d bytes", status, outbuf.status);
            if (!ztex_usb_is_connected) continue;
            ZTEX_REC(status);
        }
        else {
            /* No active data transfer. Sleep for a small amount of time. */
            CyU3PThreadSleep (100);
        }
    }
    
}

/*
 * Main function
 */
int main (void)
{
    // global configuration
    ztex_app_thread_run = run;
    ztex_usb_start = usb_start;
    ztex_usb_stop = usb_stop;
    
    ztex_main();        // starts the OS and never returns
    return 0;           // makes the compiler happy
}