看了下 usb的设备驱动
USB设备功能初始化,4个端点,8个通道
void USB_DeviceInit( void )
{
R8_USB_CTRL = 0x00; // 先设定模式,取消 RB_UC_CLR_ALL
R8_UEP4_1_MOD = RB_UEP4_RX_EN|RB_UEP4_TX_EN|RB_UEP1_RX_EN|RB_UEP1_TX_EN; // 端点4 OUT+IN,端点1 OUT+IN
R8_UEP2_3_MOD = RB_UEP2_RX_EN|RB_UEP2_TX_EN|RB_UEP3_RX_EN|RB_UEP3_TX_EN; // 端点2 OUT+IN,端点3 OUT+IN
R16_UEP0_DMA = (UINT16)(UINT32)pEP0_RAM_Addr;
R16_UEP1_DMA = (UINT16)(UINT32)pEP1_RAM_Addr;
R16_UEP2_DMA = (UINT16)(UINT32)pEP2_RAM_Addr;
R16_UEP3_DMA = (UINT16)(UINT32)pEP3_RAM_Addr;
R8_UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP1_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK | RB_UEP_AUTO_TOG;
R8_UEP2_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK | RB_UEP_AUTO_TOG;
R8_UEP3_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK | RB_UEP_AUTO_TOG;
R8_UEP4_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_USB_INT_FG = 0xFF; // 清中断标志
R8_USB_INT_EN = RB_UIE_SUSPEND | RB_UIE_BUS_RST | RB_UIE_TRANSFER;
R8_USB_DEV_AD = 0x00;
R8_USB_CTRL = RB_UC_DEV_PU_EN | RB_UC_INT_BUSY | RB_UC_DMA_EN; // 启动USB设备及DMA,在中断期间中断标志未清除前自动返回NAK
R8_UDEV_CTRL = RB_UD_PD_DIS|RB_UD_PORT_EN; // 允许USB端口
}
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