PDIUSBD12.rar_pdiusbd12

//协议层 #include <reg52.h> #include "D12Config.h" #include "D12CI.h" #include "Chap_9.h" #include "Descriptor.h" CONTROL_XFER ControlData; EPPFLAGS bEPPflags; //USB标准设备请求入口地址指针表 code void (*StandardDeviceRequest[])(void) = { get_status, clear_feature, reserved, set_feature, reserved, set_address, get_descriptor, reserved, get_configuration, set_configuration, get_interface, set_interface, reserved, reserved, reserved, reserved }; // USB 协议层函数 void stall_ep0(void) { D12_SetEndpointStatus(0, 1); D12_SetEndpointStatus(1, 1); } void reserved(void) { stall_ep0(); //返回STALL } void init_unconfig(void) { D12_SetEndpointEnable(0); //禁止0除外的所有端点 } void init_config(void) { D12_SetEndpointEnable(1); } void single_transmit(INT8U * buf, INT8U len) { if( len <= EP0_PACKET_SIZE) D12_WriteEndpoint(1, len, buf); } void code_transmit(INT8U *pRomData, INT16U len) { ControlData.wCount = 0; if(ControlData.wLength > len) ControlData.wLength = len; ControlData.pData = pRomData; if( ControlData.wLength >= EP0_PACKET_SIZE) { D12_WriteEndpoint(1, EP0_PACKET_SIZE, ControlData.pData); ControlData.wCount += EP0_PACKET_SIZE; DISABLE(); bEPPflags.bits.control_state = USB_TRANSMIT; ENABLE(); } else { D12_WriteEndpoint(1, ControlData.wLength, pRomData); ControlData.wCount += ControlData.wLength; DISABLE(); bEPPflags.bits.control_state = USB_IDLE; ENABLE(); } } // USB 标准设备请求服务程序 void get_status(void) { INT8U endp, txdat[2], c; INT8U bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT; if (bRecipient == USB_RECIPIENT_DEVICE) { if(bEPPflags.bits.remote_wakeup == 1) txdat[0] = 3; //支持远程唤醒、自供电 else txdat[0] = 1; txdat[1]=0; single_transmit(txdat, 2); //发送16位的状态到主机 } else if (bRecipient == USB_RECIPIENT_INTERFACE) { txdat[0]=0; txdat[1]=0; single_transmit(txdat, 2); } else if (bRecipient == USB_RECIPIENT_ENDPOINT) { endp = (INT8U)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS); if (ControlData.DeviceRequest.wIndex & (INT8U)USB_ENDPOINT_DIRECTION_MASK) c = D12_SelectEndpoint(endp*2 + 1); //读取输入端点状态 else c = D12_SelectEndpoint(endp*2); //读取输出端点状态 if(c & D12_STALL) txdat[0] = 1; //端点禁止 else txdat[0] = 0; //端点有效 txdat[1] = 0; single_transmit(txdat, 2); } else stall_ep0(); //非标准请求,发STALL } void clear_feature(void) { INT8U endp; INT8U bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT; if (bRecipient == USB_RECIPIENT_DEVICE&&ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) { DISABLE(); //清除远程唤醒特性 bEPPflags.bits.remote_wakeup = 0; //清0远程唤醒标志 ENABLE(); single_transmit(0, 0); //返回一个空的数据表示执行完毕 } else if (bRecipient == USB_RECIPIENT_ENDPOINT&& ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) { //清除端点禁止特性,恢复其使用 endp = (INT8U)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS); if (ControlData.DeviceRequest.wIndex & (INT8U)USB_ENDPOINT_DIRECTION_MASK) D12_SetEndpointStatus(endp*2 + 1, 0); //清除控制输入端点STALL特性 else D12_SetEndpointStatus(endp*2, 0); //清除控制输出端点STALL特性 single_transmit(0, 0); } else stall_ep0(); //没有该请求,返回STALL } void set_feature(void) { INT8U endp; INT8U bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;//读取请求类型中的接收方 if (bRecipient == USB_RECIPIENT_DEVICE && ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) {//设置远程唤醒特性 DISABLE(); bEPPflags.bits.remote_wakeup = 1; //置1远程唤醒标志 ENABLE(); single_transmit(0, 0); } else if (bRecipient == USB_RECIPIENT_ENDPOINT && ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) {//禁止端点 endp = (INT8U)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS); if (ControlData.DeviceRequest.wIndex & (INT8U)USB_ENDPOINT_DIRECTION_MASK) D12_SetEndpointStatus(endp*2 + 1, 1); //设置输入端点禁止 else D12_SetEndpointStatus(endp*2, 1); //设置输出端点禁止 single_transmit(0, 0); } else stall_ep0(); } void set_address(void) { D12_SetAddressEnable((INT8U)(ControlData.DeviceRequest.wValue & DEVICE_ADDRESS_MASK), 1); single_transmit(0, 0); } void get_descriptor(void) { INT8U bDescriptor = MSB(ControlData.DeviceRequest.wValue); //读取请求的描述符类型 if (bDescriptor == USB_DEVICE_DESCRIPTOR_TYPE) {//获取设备描述符 code_transmit((INT8U *)&DeviceDescr, sizeof(USB_DEVICE_DESCRIPTOR)); } else if (bDescriptor == USB_CONFIGURATION_DESCRIPTOR_TYPE) {//获取其它描述符 if (ControlData.DeviceRequest.wLength > CONFIG_DESCRIPTOR_LENGTH) { ControlData.DeviceRequest.wLength = CONFIG_DESCRIPTOR_LENGTH; } code_transmit((INT8U *)&(usb_descr.ConfigDescr), ControlData.DeviceRequest.wLength); //发送描述符内容 } else stall_ep0(); } void get_configuration(void) { INT8U c = bEPPflags.bits.configuration; //取出配置值 single_transmit(&c, 1); //发送配置值 } void set_configuration(void) { if (ControlData.DeviceRequest.wValue == 0) {//配置值不对,设备进入未配置状态 single_transmit(0, 0); DISABLE(); bEPPflags.bits.configuration = 0; ENABLE(); init_unconfig(); //进入地址状态,禁止0除外的所有端点 } else if (ControlData.DeviceRequest.wValue == 1) { single_transmit(0, 0); init_unconfig(); init_config(); DISABLE(); bEPPflags.bits.configuration = 1; ENABLE(); } else stall_ep0(); } void get_interface(void) { INT8U txdat = 0; //本设备只有一个接口 single_transmit(&txdat, 1); //发送一个字节 } void set_interface(void) { if (ControlData.DeviceRequest.wValue == 0 && ControlData.DeviceRequest.wIndex == 0) single_transmit(0, 0); else stall_ep0(); } void control_handler(void) //协议控制子程序 { INT8U type, req; type = ControlData.DeviceRequest.bmRequestType & USB_REQUEST_TYPE_MASK; //读取请求代码 req = ControlData.DeviceRequest.bRequest & USB_REQUEST_MASK; if (type == USB_STANDARD_REQUEST) (*StandardDeviceRequest[req])(); //标准请求处理 else stall_ep0(); } void ep0_rxdone(void) //端点0接收数据 { INT8U ep_last, i; INT8U req[sizeof(DEVICE_REQUEST)]; ep_last = D12_ReadLastTransactionStatus(0); //清除中断寄存器状态,取得最后处理状态 if (ep_last & D12_SETUPPACKET) { //如果收到了建立包(Setup包) ControlData.wLength = 0; //传输字节总数清0 ControlData.wCount = 0; //传输字节计数器清0 if(D12_ReadEndpoint(0, sizeof(ControlData.DeviceRequest),req) != sizeof(DEVICE_REQUEST) ) { //从端点0读8个字节失败 D12_SetEndpointStatus(0, 1); //停止控制端点0 D12_SetEndpointStatus(1, 1); //停止控制端点1 bEPPflags.bits.control_state = USB_IDLE; //设置为等待状态 return; } /******* 以下语句通信中的解决大小端问题,使该函数与编译器无关 ****/ ControlData.DeviceRequest.bmRequestType = req[0]; ControlData.DeviceRequest.bRequest = req[1]; ControlData.DeviceRequest.wValue = req[3] * 256 + req[2]; ControlData.DeviceRequest.wIndex = req[5] * 256 + req[4]; ControlData.DeviceRequest.wLength = req[7] * 256 + req[6]; /******** 接收建立包成功 **********/ D12_AcknowledgeEndpoint(0); //对控制端点0进行�