本帖最后由 Cheas_Tong 于 2021-9-7 16:46 编辑
示例代码 CH554&CH552模拟USB键盘，串口接收数据转换成键值上传，如串口发送‘a’，上传至文本显示‘a’,支持多字节同时发送。
请教一下各路大佬，想在这个基础上修改一个自己的设备，报告描述符超过256个字节了。如果报告描述符超过256字节的话应该怎么配置呢？ 我看发送UEP_T_LEN是一个字节长度的寄存器，如果报告描述符超过256个字节的话，应该怎么处理？
未改动的示例代码如下：
#define THIS_ENDP0_SIZE DEFAULT_ENDP0_SIZE
#define CapsLockLED 0x02
#define BUFMAX 16
UINT8X Ep0Buffer[8>(THIS_ENDP0_SIZE+2)?8:(THIS_ENDP0_SIZE+2)] _at_ 0x0000; //端点0 OUT&IN缓冲区，必须是偶地址
UINT8X Ep1Buffer[64>(MAX_PACKET_SIZE+2)?64:(MAX_PACKET_SIZE+2)] _at_ 0x000a; //端点1 IN缓冲区,必须是偶地址
UINT8 SetupReq,SetupLen,Ready,Count,FLAG,UsbConfig,LED_VALID;
PUINT8 pDescr; //USB配置标志
USB_SETUP_REQ SetupReqBuf; //暂存Setup包
bit Ep2InKey;
#define UsbSetupBuf ((PUSB_SETUP_REQ)Ep0Buffer)
#define DEBUG 0
#pragma NOAREGS
/*设备描述符*/
UINT8C DevDesc[18] = {0x12,0x01,0x10,0x01,0x00,0x00,0x00,0x08,
0x3d,0x41,0x07,0x21,0x00,0x00,0x00,0x00,
0x00,0x01
};
UINT8C CfgDesc[59] =
{
0x09,0x02,0x22,0x00,0x01,0x01,0x00,0xA0,0x32, //配置描述符
0x09,0x04,0x00,0x00,0x01,0x03,0x01,0x01,0x00, //接口描述符,键盘
0x09,0x21,0x11,0x01,0x00,0x01,0x22,0x3e,0x00, //HID类描述符
0x07,0x05,0x81,0x03,0x08,0x00,0x0a, //端点描述符
};
/*字符串描述符*/
/*HID类报表描述符*/
UINT8C KeyRepDesc[62] =
{
0x05,0x01,0x09,0x06,0xA1,0x01,0x05,0x07,
0x19,0xe0,0x29,0xe7,0x15,0x00,0x25,0x01,
0x75,0x01,0x95,0x08,0x81,0x02,0x95,0x01,
0x75,0x08,0x81,0x01,0x95,0x03,0x75,0x01,
0x05,0x08,0x19,0x01,0x29,0x03,0x91,0x02,
0x95,0x05,0x75,0x01,0x91,0x01,0x95,0x06,
0x75,0x08,0x26,0xff,0x00,0x05,0x07,0x19,
0x00,0x29,0x91,0x81,0x00,0xC0
};
/*键盘数据*/
UINT8 HIDKey[8] = {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0};
UINT8 DataBuffer[BUFMAX];
UINT8 DataLen =0;
UINT8 RecvPoint =0;
UINT8 SendPoint =0;
/*******************************************************************************
* Function Name : USBDeviceInit()
* Description : USB设备模式配置,设备模式启动，收发端点配置，中断开启
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void USBDeviceInit()
{
IE_USB = 0;
USB_CTRL = 0x00; // 先设定USB设备模式
UEP0_DMA = Ep0Buffer; //端点0数据传输地址
UEP1_DMA = Ep1Buffer; //端点1数据传输地址
UEP4_1_MOD = ~(bUEP4_RX_EN | bUEP4_TX_EN |bUEP1_RX_EN | bUEP1_BUF_MOD) | bUEP4_TX_EN;//端点1单64字节收发缓冲区,端点0收发
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK; //OUT事务返回ACK，IN事务返回NAK
UEP1_CTRL = bUEP_T_TOG | UEP_T_RES_NAK;
USB_DEV_AD = 0x00;
UDEV_CTRL = bUD_PD_DIS; // 禁止DP/DM下拉电阻
USB_CTRL = bUC_DEV_PU_EN | bUC_INT_BUSY | bUC_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
UDEV_CTRL |= bUD_PORT_EN; // 允许USB端口
USB_INT_FG = 0xFF; // 清中断标志
USB_INT_EN = bUIE_SUSPEND | bUIE_TRANSFER | bUIE_BUS_RST;
IE_USB = 1;
}
/*******************************************************************************
* Function Name : Enp1IntIn()
* Description : USB设备模式端点1的中断上传
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void Enp1IntIn( )
{
memcpy( Ep1Buffer, HIDKey, sizeof(HIDKey)); //加载上传数据
UEP1_T_LEN = sizeof(HIDKey); //上传数据长度
UEP1_CTRL = UEP1_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_ACK; //有数据时上传数据并应答ACK
}
/*******************************************************************************
* Function Name : DeviceInterrupt()
* Description : CH559USB中断处理函数
*******************************************************************************/
void DeviceInterrupt( void ) interrupt INT_NO_USB using 1 //USB中断服务程序,使用寄存器组1
{
UINT8 len;
if(UIF_TRANSFER) //USB传输完成标志
{
switch (USB_INT_ST & (MASK_UIS_TOKEN | MASK_UIS_ENDP))
{
case UIS_TOKEN_IN | 2: //endpoint 2# 中断端点上传
UEP2_T_LEN = 0; //预使用发送长度一定要清空
// UEP1_CTRL ^= bUEP_T_TOG; //如果不设置自动翻转则需要手动翻转
UEP2_CTRL = UEP2_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_NAK; //默认应答NAK
break;
case UIS_TOKEN_IN | 1: //endpoint 1# 中断端点上传
UEP1_T_LEN = 0; //预使用发送长度一定要清空
// UEP2_CTRL ^= bUEP_T_TOG; //如果不设置自动翻转则需要手动翻转
UEP1_CTRL = UEP1_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_NAK; //默认应答NAK
FLAG = 1; /*传输完成标志*/
break;
case UIS_TOKEN_SETUP | 0: //SETUP事务
len = USB_RX_LEN;
if(len == (sizeof(USB_SETUP_REQ)))
{
SetupLen = UsbSetupBuf->wLengthL;
if(UsbSetupBuf->wLengthH || SetupLen > 0x7F )
{
SetupLen = 0x7F; // 限制总长度
}
len = 0; // 默认为成功并且上传0长度
SetupReq = UsbSetupBuf->bRequest;
if ( ( UsbSetupBuf->bRequestType & USB_REQ_TYP_MASK ) != USB_REQ_TYP_STANDARD )/* HID类命令 */
{
switch( SetupReq )
{
case 0x01://GetReport
break;
case 0x02://GetIdle
break;
case 0x03://GetProtocol
break;
case 0x09://SetReport
break;
case 0x0A://SetIdle
break;
case 0x0B://SetProtocol
break;
default:
len = 0xFF; /*命令不支持*/
break;
}
}
else
{//标准请求
switch(SetupReq) //请求码
{
case USB_GET_DESCRIPTOR:
switch(UsbSetupBuf->wValueH)
{
case 1: //设备描述符
pDescr = DevDesc; //把设备描述符送到要发送的缓冲区
len = sizeof(DevDesc);
break;
case 2: //配置描述符
pDescr = CfgDesc; //把设备描述符送到要发送的缓冲区
len = sizeof(CfgDesc);
break;
case 0x22: //报表描述符
if(UsbSetupBuf->wIndexL == 0) //接口0报表描述符
{
pDescr = KeyRepDesc; //数据准备上传
len = sizeof(KeyRepDesc);
Ready = 1; //如果有更多接口，该标准位应该在最后一个接口配置完成后有效
IE_UART1 = 1;//开启串口中断
}
else
{
len = 0xff; //本程序只有2个接口，这句话正常不可能执行
}
break;
default:
len = 0xff; //不支持的命令或者出错
break;
}
if ( SetupLen > len )
{
SetupLen = len; //限制总长度
}
len = SetupLen >= 8 ? 8 : SetupLen; //本次传输长度
memcpy(Ep0Buffer,pDescr,len); //加载上传数据
SetupLen -= len;
pDescr += len;
break;
case USB_SET_ADDRESS:
SetupLen = UsbSetupBuf->wValueL; //暂存USB设备地址
break;
case USB_GET_CONFIGURATION:
Ep0Buffer[0] = UsbConfig;
if ( SetupLen >= 1 )
{
len = 1;
}
break;
case USB_SET_CONFIGURATION:
UsbConfig = UsbSetupBuf->wValueL;
break;
case 0x0A:
break;
case USB_CLEAR_FEATURE: //Clear Feature
if ( ( UsbSetupBuf->bRequestType & USB_REQ_RECIP_MASK ) == USB_REQ_RECIP_ENDP )// 端点
{
switch( UsbSetupBuf->wIndexL )
{
case 0x82:
UEP2_CTRL = UEP2_CTRL & ~ ( bUEP_T_TOG | MASK_UEP_T_RES ) | UEP_T_RES_NAK;
break;
case 0x81:
UEP1_CTRL = UEP1_CTRL & ~ ( bUEP_T_TOG | MASK_UEP_T_RES ) | UEP_T_RES_NAK;
break;
case 0x01:
UEP1_CTRL = UEP1_CTRL & ~ ( bUEP_R_TOG | MASK_UEP_R_RES ) | UEP_R_RES_ACK;
break;
default:
len = 0xFF; // 不支持的端点
break;
}
}
else
{
len = 0xFF; // 不是端点不支持
}
break;
case USB_SET_FEATURE: /* Set Feature */
if( ( UsbSetupBuf->bRequestType & 0x1F ) == 0x00 ) /* 设置设备 */
{
if( ( ( ( UINT16 )UsbSetupBuf->wValueH << 8 ) | UsbSetupBuf->wValueL ) == 0x01 )
{
if( CfgDesc[ 7 ] & 0x20 )
{
/* 设置唤醒使能标志 */
}
else
{
len = 0xFF; /* 操作失败 */
}
}
else
{
len = 0xFF; /* 操作失败 */
}
}
else if( ( UsbSetupBuf->bRequestType & 0x1F ) == 0x02 ) /* 设置端点 */
{
if( ( ( ( UINT16 )UsbSetupBuf->wValueH << 8 ) | UsbSetupBuf->wValueL ) == 0x00 )
{
switch( ( ( UINT16 )UsbSetupBuf->wIndexH << 8 ) | UsbSetupBuf->wIndexL )
{
case 0x82:
UEP2_CTRL = UEP2_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL;/* 设置端点2 IN STALL */
break;
case 0x02:
UEP2_CTRL = UEP2_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL;/* 设置端点2 OUT Stall */
break;
case 0x81:
UEP1_CTRL = UEP1_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL;/* 设置端点1 IN STALL */
break;
default:
len = 0xFF; //操作失败
break;
}
}
else
{
len = 0xFF; //操作失败
}
}
else
{
len = 0xFF; //操作失败
}
break;
case USB_GET_STATUS:
Ep0Buffer[0] = 0x00;
Ep0Buffer[1] = 0x00;
if ( SetupLen >= 2 )
{
len = 2;
}
else
{
len = SetupLen;
}
break;
default:
len = 0xff; //操作失败
break;
}
}
}
else
{
len = 0xff; //包长度错误
}
if(len == 0xff)
{
SetupReq = 0xFF;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_STALL | UEP_T_RES_STALL;//STALL
}
else if(len <= 8) //上传数据或者状态阶段返回0长度包
{
UEP0_T_LEN = len;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK;//默认数据包是DATA1，返回应答ACK
}
else
{
UEP0_T_LEN = 0; //虽然尚未到状态阶段，但是提前预置上传0长度数据包以防主机提前进入状态阶段
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK;//默认数据包是DATA1,返回应答ACK
}
break;
case UIS_TOKEN_IN | 0: //endpoint0 IN
switch(SetupReq)
{
case USB_GET_DESCRIPTOR:
len = SetupLen >= 8 ? 8 : SetupLen; //本次传输长度
memcpy( Ep0Buffer, pDescr, len ); //加载上传数据
SetupLen -= len;
pDescr += len;
UEP0_T_LEN = len;
UEP0_CTRL ^= bUEP_T_TOG; //同步标志位翻转
break;
case USB_SET_ADDRESS:
USB_DEV_AD = USB_DEV_AD & bUDA_GP_BIT | SetupLen;
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
break;
default:
UEP0_T_LEN = 0; //状态阶段完成中断或者是强制上传0长度数据包结束控制传输
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
break;
}
break;
case UIS_TOKEN_OUT | 0: // endpoint0 OUT
len = USB_RX_LEN;
if((SetupReq == 0x09)&& (len == 1))
{
LED_VALID = Ep0Buffer[0];
}
else if((SetupReq == 0x09) && (len == 8)){//SetReport
}
UEP0_T_LEN = 0; //虽然尚未到状态阶段，但是提前预置上传0长度数据包以防主机提前进入状态阶段
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_ACK;//默认数据包是DATA0,返回应答ACK
break;
default:
break;
}
UIF_TRANSFER = 0; //写0清空中断
}
if(UIF_BUS_RST) //设备模式USB总线复位中断
{
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
UEP1_CTRL = bUEP_AUTO_TOG | UEP_R_RES_ACK;
UEP2_CTRL = bUEP_AUTO_TOG | UEP_R_RES_ACK | UEP_T_RES_NAK;
USB_DEV_AD = 0x00;
UIF_SUSPEND = 0;
UIF_TRANSFER = 0;
UIF_BUS_RST = 0; //清中断标志
}
if (UIF_SUSPEND) //USB总线挂起/唤醒完成
{
UIF_SUSPEND = 0;
}
else { //意外的中断,不可能发生的情况
USB_INT_FG = 0xFF; //清中断标志
}
}
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