USB 音频类初始化

/*--------------------------------------------------------------------------*/

/**

 * [url=home.php?mod=space&uid=247401]@brief[/url]       UAC Class Initial

 *

 * @param[in]   None

 *

 * [url=home.php?mod=space&uid=266161]@return[/url]      None

 *

 * [url=home.php?mod=space&uid=1543424]@Details[/url]     This function is used to configure endpoints for UAC class

 */

void UAC_Init(void)

{

    /* Init setup packet buffer */

    /* Buffer for setup packet -> [0 ~ 0x7] */

    USBD->STBUFSEG = SETUP_BUF_BASE;



    /*****************************************************/

    /* EP0 ==> control IN endpoint, address 0 */

    USBD_CONFIG_EP(EP0, USBD_CFG_CSTALL | USBD_CFG_EPMODE_IN | 0);

    /* Buffer range for EP0 */

    USBD_SET_EP_BUF_ADDR(EP0, EP0_BUF_BASE);



    /* EP1 ==> control OUT endpoint, address 0 */

    USBD_CONFIG_EP(EP1, USBD_CFG_CSTALL | USBD_CFG_EPMODE_OUT | 0);

    /* Buffer range for EP1 */

    USBD_SET_EP_BUF_ADDR(EP1, EP1_BUF_BASE);



    /*****************************************************/

    /* EP2 ==> Isochronous IN endpoint, address 1 */

    USBD_CONFIG_EP(EP2, USBD_CFG_EPMODE_IN | ISO_IN_EP_NUM | USBD_CFG_TYPE_ISO);

    /* Buffer offset for EP2 */

    USBD_SET_EP_BUF_ADDR(EP2, EP2_BUF_BASE);



    /*****************************************************/

    /* EP3 ==> Isochronous OUT endpoint, address 2 */

    USBD_CONFIG_EP(EP3, USBD_CFG_EPMODE_OUT | ISO_OUT_EP_NUM | USBD_CFG_TYPE_ISO);

    /* Buffer offset for EP3 */

    USBD_SET_EP_BUF_ADDR(EP3, EP3_BUF_BASE);

    /* trigger receive OUT data */

    USBD_SET_PAYLOAD_LEN(EP3, EP3_MAX_PKT_SIZE);

}

USBD->STBUFSEG = SETUP_BUF_BASE;

USBD_CONFIG_EP(EP0, USBD_CFG_CSTALL | USBD_CFG_EPMODE_IN | 0);

USBD_SET_EP_BUF_ADDR(EP0, EP0_BUF_BASE);



USBD_CONFIG_EP(EP1, USBD_CFG_CSTALL | USBD_CFG_EPMODE_OUT | 0);

USBD_SET_EP_BUF_ADDR(EP1, EP1_BUF_BASE);

USBD_CONFIG_EP(EP2, USBD_CFG_EPMODE_IN | ISO_IN_EP_NUM | USBD_CFG_TYPE_ISO);

USBD_SET_EP_BUF_ADDR(EP2, EP2_BUF_BASE);



USBD_CONFIG_EP(EP3, USBD_CFG_EPMODE_OUT | ISO_OUT_EP_NUM | USBD_CFG_TYPE_ISO);

USBD_SET_EP_BUF_ADDR(EP3, EP3_BUF_BASE);

USBD_SET_PAYLOAD_LEN(EP3, EP3_MAX_PKT_SIZE);