收到CY_U3P_USB_EVENT_SETCONF事件时，我正在尝试将我的DMA通道创建代码从CyFxApplnInit移动到USB事件回调，但是我收到来自CyU3PDmaMultiChannelCreate API调用的错误代码0x40，当API调用在CyFxApplnInit中时，我从未收到过...
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收到CY_U3P_USB_EVENT_SETCONF事件时，我正在尝试将我的DMA通道创建代码从CyFxApplnInit移动到USB事件回调，但是我收到来自CyU3PDmaMultiChannelCreate API调用的错误代码0x40，当API调用在CyFxApplnInit中时，我从未收到过它。 我的代码与 cyfxApplNinit 中的代码完全相同，所以我不确定为什么突然出现无效的参数错误。 我编译时没有错误或警告。 以下是我的代码片段。 如果能帮助我确定为什么会出现这些错误，我将不胜感激。
/* Creates UVC DMA channels. */
static void
CyFxUVCApplnDmaChannelCreate (void)
{
CyU3PEpConfig_t epCfg;
CyU3PDmaMultiChannelConfig_t dmaMultiCfg;
CyU3PReturnStatus_t apiRetStatus = CY_U3P_SUCCESS;
/* VideoStreaming USB IN Endpoint Configuration */
epCfg.enable = CyTrue;
epCfg.epType = CY_U3P_USB_EP_BULK;
epCfg.pcktSize = CY_FX_EP_BULK_VIDEO_PKT_SIZE;
epCfg.burstLen = CY_FX_EP_BULK_VIDEO_PKTS_COUNT;
epCfg.isoPkts = 0;
epCfg.streams = 0;
apiRetStatus = CyU3PSetEpConfig(CY_FX_EP_VID_BULK, &epCfg);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyU3PDebugPrint (4, "UVC start CyU3PSetEpConfig failed, Error code = 0x%x\r\n", apiRetStatus);
ApplnErrorHandler(apiRetStatus);
}
dmaMultiCfg.size = CY_FX_UVC_STREAM_BUF_SIZE; /* 16KB */
dmaMultiCfg.count = CY_FX_UVC_STREAM_BUF_COUNT; /* 4 */
dmaMultiCfg.dmaMode = CY_U3P_DMA_MODE_BYTE; /* Should always be CY_U3P_DMA_MODE_BYTE */
dmaMultiCfg.notification = 0;
dmaMultiCfg.prodHeader = 0;
dmaMultiCfg.prodFooter = 0;
dmaMultiCfg.consHeader = 0;
dmaMultiCfg.prodAvailCount = 0; /* Must always be 0 */
dmaMultiCfg.cb = NULL;
dmaMultiCfg.validSckCount = 2;
dmaMultiCfg.prodSckId[0] = CY_U3P_PIB_SOCKET_0;
dmaMultiCfg.prodSckId[1] = CY_U3P_PIB_SOCKET_1;
dmaMultiCfg.consSckId[0] = (CY_U3P_UIB_SOCKET_CONS_0 | 0x02);
apiRetStatus = CyU3PDmaMultiChannelCreate(&glChHandleUVCStream, CY_U3P_DMA_TYPE_AUTO_MANY_TO_ONE, &dmaMultiCfg);
if (apiRetStatus != CY_U3P_SUCCESS)
{
CyU3PDebugPrint(4, "UVC start CyU3PDmaChannelCreate failed, Error code = 0x%x\r\n", apiRetStatus);
ApplnErrorHandler(apiRetStatus);
}
CyU3PUsbFlushEp (CY_FX_EP_VID_BULK); /* Recommended to flush after creation */
以下是 CY_U3P_USB_EVENT_SETCONF 的具体情况，当时我想创建 DMA 频道
case CY_U3P_USB_EVENT_SETCONF:
if (CyU3PUsbGetSpeed() == CY_U3P_SUPER_SPEED)
{
CyU3PDebugPrint(4, "UsbEventCB: Detected SS USB Connection\r\n");
}
else if (CyU3PUsbGetSpeed() == CY_U3P_HIGH_SPEED)
{
CyU3PDebugPrint(4, "UsbEventCB: Detected HS USB Connection\r\n");
}
/* Create UVC DMA channels */
CyFxUVCApplnDmaChannelCreate();
CyU3PDebugPrint(4, "UsbEventCB: Created UVC DMA\r\n");
glUVCEventProd = 0;
glUVCEventCons = 0;
glUVCEventError = 0;
glUACEventProd = 0;
glUACEventCons = 0;
glUACEventError = 0;
CyFxApplnPrintConf();
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