?? chapter9.c
字號(hào):
else if(bDescriptor == USB_STRING_DESCRIPTOR) //字符串描述符
{
#ifdef debug
PutString0(" Get usb string descriptor.....\r\n",50);
#endif
switch(LSB(ControlData.DeviceRequest.wValue))
{
case 0:
//獲取語言ID
#ifdef debug
PutString0(" Get language ID....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > LANGUAGE_ID[0])
ControlData.DeviceRequest.wLength = LANGUAGE_ID[0];
code_transmit((uint8 *)LANGUAGE_ID, ControlData.DeviceRequest.wLength);
break;
case 1:
//獲取廠商字符串
#ifdef debug
PutString0(" Get manufaceture String descriptor....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > ManufacturerString[0])
ControlData.DeviceRequest.wLength = ManufacturerString[0];
code_transmit((uint8 *)ManufacturerString, ControlData.DeviceRequest.wLength);
break;
case 2:
//獲取產(chǎn)品字符串
#ifdef debug
PutString0(" Get Product String descriptor....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > ProducterString[0])
ControlData.DeviceRequest.wLength = ProducterString[0];
code_transmit((uint8 *)ProducterString, ControlData.DeviceRequest.wLength);
break;
case 3:
//獲取設(shè)備序列號(hào)
#ifdef debug
PutString0(" Get device serial number String descriptor....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > device_serial_number[0])
ControlData.DeviceRequest.wLength = device_serial_number[0];
code_transmit((uint8 *)device_serial_number, ControlData.DeviceRequest.wLength);
break;
default:
break;
}
}
else
stall_ep0(); //沒有該請(qǐng)求,返回STALL
}
else if(bRecipient == USB_RECIPIENT_INTERFACE) //接口接收
{
switch(MSB(ControlData.DeviceRequest.wValue))
{
case USB_HID_DESCRIPTOR:
#ifdef debug
PutString0(" Get USB HID descriptor....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > sizeof(HID_DESCRIPTOR_STRUCT))
ControlData.DeviceRequest.wLength = sizeof(HID_DESCRIPTOR_STRUCT);
code_transmit((uint8 *)&(usb_descriptor.hid_descriptor),sizeof(HID_DESCRIPTOR_STRUCT));
break;
case USB_REPORT_DESCRIPTOR:
#ifdef debug
PutString0(" Get USB report descriptor....\r\n",50);
#endif
if(ControlData.DeviceRequest.wLength > sizeof(HidUseReportDescriptor))
ControlData.DeviceRequest.wLength = sizeof(HidUseReportDescriptor);
code_transmit((uint8 *)HidUseReportDescriptor,sizeof(HidUseReportDescriptor));
break;
case USB_PHYSICAL_DESCRIPTOR:
#ifdef debug
PutString0(" Get USB physical descriptor....\r\n",50);
#endif
break;
default:
break;
}
}
else if(bRecipient == USB_RECIPIENT_ENDPOINT)
{
//do nothing;
}
}
/****************************************
** 函數(shù)名稱: void get_configuration(void)
** 功能描述: 獲取配置
*****************************************/
void get_configuration(void)
{
uint8 idata c = bEPPflags.bits.configuration; //取出配置值
single_transmit(&c, 1); //發(fā)送配置值
}
/****************************************
** 函數(shù)名稱: void set_configuration(void)
** 功能描述: 設(shè)置配置
*****************************************/
void set_configuration(void)
{
if (ControlData.DeviceRequest.wValue == 0) //配置值不對(duì),設(shè)備進(jìn)入未配置狀態(tài)
{
single_transmit(0, 0); //發(fā)向一個(gè)空包響應(yīng)
bEPPflags.bits.configuration = 0; //標(biāo)記未配置
init_unconfig(); //進(jìn)入地址狀態(tài),禁止0除外的所有端點(diǎn)
}
else if (ControlData.DeviceRequest.wValue == 1) //配置設(shè)備
{
single_transmit(0, 0); //發(fā)向一個(gè)空包響應(yīng)
init_unconfig(); //進(jìn)入地址狀態(tài),禁止0除外的所有端點(diǎn)
init_config(); //配置處理,允許端點(diǎn)收發(fā)
bEPPflags.bits.configuration = 1; //標(biāo)志已配置
} else
stall_ep0(); //沒有該請(qǐng)求,返回STALL
}
/****************************************
** 函數(shù)名稱: void get_interface(void)
** 功能描述: 獲取接口信息
*****************************************/
void get_interface(void)
{
uint8 idata txdat = 0; //本設(shè)備只有一個(gè)接口
single_transmit(&txdat, 1); //發(fā)送一個(gè)字節(jié)
}
/****************************************
** 函數(shù)名稱: void set_interface(void)
** 功能描述: 設(shè)置接口信息
*****************************************/
void set_interface(void)
{
if (ControlData.DeviceRequest.wValue == 0 && ControlData.DeviceRequest.wIndex == 0)
single_transmit(0, 0); //發(fā)送一個(gè)空的數(shù)據(jù)表示執(zhí)行完畢
else
stall_ep0(); //沒有該請(qǐng)求,返回STALL
}
void get_report(void)
{
single_transmit(0,0);
}
void get_idle(void)
{
single_transmit(&idle,1);
}
void get_protocol(void)
{
single_transmit(&protocol,1);
}
void set_report(void)
{
single_transmit(0,0);
}
void set_idle(void)
{
idle = ControlData.DeviceRequest.wValue;
single_transmit(0,0);
}
void set_protocol(void)
{
protocol = ControlData.DeviceRequest.wValue;
single_transmit(0,0);
}
/*************************************************************
** 函數(shù)名稱: void control_handler()
** 功能描述: 控制傳輸
**************************************************************/
void control_handler()
{
uint8 idata type, req;
type = ControlData.DeviceRequest.bmRequestType & USB_REQUEST_TYPE;
req = ControlData.DeviceRequest.bRequest & USB_REQUEST_MASK;//讀取請(qǐng)求代碼
if (type == USB_STANDARD_REQUEST)
(*StandardDeviceRequest[req])(); //標(biāo)準(zhǔn)請(qǐng)求處理
//else if (type == USB_VENDOR_REQUEST) //廠商請(qǐng)求
// (*VendorDeviceRequest[req])();
else if(type == USB_CLASS_REQUEST)
(*ClassDeviceRequest[req])(); //類請(qǐng)求,如大容量類
else
stall_ep0(); //無效請(qǐng)求,返回STALL
}
/***************************************
** 函數(shù)名稱: void ep0_rxdone(void)
** 功能描述: 通過端點(diǎn)索引 0 接收數(shù)據(jù)
** 輸 入: 無
** 輸 出: 無
***************************************/
void ep0_rxdone(void)
{
uint8 idata ep_last, i;
uint8 idata req[sizeof(DEVICE_REQUEST)];
ep_last = D12_ReadLastTransactionStatus(0); //清除中斷寄存器狀態(tài),取得最后處理狀態(tài)
if (ep_last & D12_SETUPPACKET) //如果收到了建立包(Setup包)
{
ControlData.wLength = 0; //傳輸字節(jié)總數(shù)清0
ControlData.wCount = 0; //傳輸字節(jié)計(jì)數(shù)器清0
if(D12_ReadEndpoint(0, sizeof(ControlData.DeviceRequest),req) != sizeof(DEVICE_REQUEST) ) //從端點(diǎn)0讀8個(gè)字節(jié)失敗
{
D12_SetEndpointStatus(0, 1); //停止控制端點(diǎn)0
D12_SetEndpointStatus(1, 1); //停止控制端點(diǎn)1
bEPPflags.bits.control_state = USB_IDLE; //設(shè)置為等待狀態(tài)
return;
}
/******* 以下語句通信中的解決大小端問題,使該函數(shù)與編譯器無關(guān) ****/
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); //對(duì)控制端點(diǎn)0進(jìn)行建立包應(yīng)答
D12_AcknowledgeEndpoint(1); //對(duì)控制端點(diǎn)1進(jìn)行建立包應(yīng)答
ControlData.wLength = ControlData.DeviceRequest.wLength; //取出要傳輸數(shù)據(jù)的總字節(jié)數(shù)
ControlData.wCount = 0;
if (ControlData.DeviceRequest.bmRequestType & (uint8)USB_ENDPOINT_DIRECTION_MASK) //如果控制傳輸是控制讀取
{
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_TRANSMIT; //設(shè)置為發(fā)送狀態(tài)
bEPPflags.bits.transmit_not_end = 0;
}
else//控制傳輸是控制輸出(主機(jī)OUT)
{
if (ControlData.DeviceRequest.wLength == 0)
{
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_IDLE; //設(shè)置為等待狀態(tài)
}
else
{
if (ControlData.DeviceRequest.wLength > MAX_CONTROLDATA_SIZE) //數(shù)據(jù)長(zhǎng)度出錯(cuò)
{
bEPPflags.bits.control_state = USB_IDLE; //設(shè)置為等待狀態(tài)
D12_SetEndpointStatus(0, 1); //停止控制端點(diǎn)0
D12_SetEndpointStatus(1, 1); //停止控制端點(diǎn)1
}
else
bEPPflags.bits.control_state = USB_RECEIVE; //設(shè)置為接收狀態(tài)
}// set command with data
}// else set command
}// if setup packet
/***** 下面為控制寫入的數(shù)據(jù)階段 ***************/
else if (bEPPflags.bits.control_state == USB_RECEIVE) //如果為接收狀態(tài)
{
i = D12_ReadEndpoint(0, EP0_PACKET_SIZE,ControlData.dataBuffer + ControlData.wCount); //從端點(diǎn)0接收數(shù)據(jù)
ControlData.wCount += i; //統(tǒng)計(jì)已接收的字節(jié)數(shù)
if( i != EP0_PACKET_SIZE || ControlData.wCount >= ControlData.wLength)
{ //數(shù)據(jù)接收完畢
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_IDLE; //設(shè)置為等待狀態(tài)
}
}
else
bEPPflags.bits.control_state = USB_IDLE; //設(shè)置等待狀態(tài)
}
/***************************************
** 函數(shù)名稱: void ep0_txdone(void)
** 功能描述: 通過端點(diǎn)索引 0 發(fā)送數(shù)據(jù)
** 輸 入: 無
** 輸 出: 無
***************************************/
void ep0_txdone(void)
{
int16 idata i = ControlData.wLength - ControlData.wCount; //計(jì)算未發(fā)送的字節(jié)數(shù)
D12_ReadLastTransactionStatus(1); //清除中斷寄存器標(biāo)志位
if (bEPPflags.bits.control_state != USB_TRANSMIT) //非發(fā)送狀態(tài)
{
single_transmit(0, 0);
return; //返回
}
if( i >= EP0_PACKET_SIZE) //未發(fā)送字節(jié)數(shù)大于16,發(fā)送16個(gè)字節(jié)
{
D12_WriteEndpoint(1, EP0_PACKET_SIZE, ControlData.pData + ControlData.wCount);
ControlData.wCount += EP0_PACKET_SIZE;
bEPPflags.bits.control_state = USB_TRANSMIT;
}
else if( i != 0) //發(fā)送所有未發(fā)送的字節(jié)
{
D12_WriteEndpoint(1, i, ControlData.pData + ControlData.wCount);
ControlData.wCount += i;
bEPPflags.bits.control_state = USB_IDLE; //置狀態(tài)為等待狀態(tài)
}
else if (i == 0)
{
D12_WriteEndpoint(1, 0, 0); //發(fā)送完畢,發(fā)0個(gè)字節(jié)
bEPPflags.bits.control_state = USB_IDLE;
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -