?? host_811.c
字號:
#include <host_811.h>
//*****************************************************************************************
// SL811H Modules (major routines only):
//*****************************************************************************************
// 1) usbXfer() : handles usd data transfer, SETUP,IN, OUT
// 2) ep0Xfer() : handles endpoint zero control pipe
// 3) DataRW() : handles data endpoint transfer pipe
// 4) EnumUsbDev() : device enum(HID/HUB), excl. multi-interface
// 6) speed_detect(): SL811H slave device attach/speed detect
// 7) slave_detect(): Main loop control between SL811H & EZUSB & GUI
//*****************************************************************************************
// xdata variables
//*****************************************************************************************
BYTE volatile xdata SL811H_ADDR _at_ 0xFFF6; //USB地址口
BYTE volatile xdata SL811H_DATA _at_ 0xFFF7; //USB數據口
BYTE xdata DBUF[256]; // at 0x2000 for general descriptors data
BYTE xdata remainder; // Remaining byte in a USB transfer
pUSBDEV xdata uDev[MAX_DEV]; // Multiple USB devices attributes, Max 5 devices
pDevDesc xdata pDev; // Device descriptor struct
pCfgDesc xdata pCfg; // Configuration descriptor struct
pIntfDesc xdata pIfc; // Interface descriptor struct
pEPDesc xdata pEnp; // Endpoint descriptor struct
pStrDesc xdata pStr; // String descriptor struct
//*****************************************************************************************
// Boolean Logic Defines
//*****************************************************************************************
BOOL SLAVE_FOUND; // Slave USB device found
BOOL SLAVE_ENUMERATED; // slave USB device enumeration done
BOOL FULL_SPEED; // Full-Speed = TRUE, Low-Speed = FALSE
BOOL BULK_OUT_DONE; // Set when EZUSB's OUT1 hostcmd xfer is done
BOOL DESC_XFER; // Set when there is data for EZUSB's IN1 desc xfer
BOOL DATA_XFER; // Set when there is data for EZUSB's IN3 data xfer
BOOL DATA_XFER_OUT; // Set when there is data for EZUSB's OUT3 data xfer
BOOL CONFIG_DONE; // Set when EZUSB completes its enumeration process.
BOOL TIMEOUT_ERR; // timeout error during data endpoint transfer
BOOL DATA_STOP; // device unplugged during data transfer
BOOL DATA_INPROCESS; // set when we are in a data pipe transfer
BOOL pLS_HUB; // indicate previous command is a LS device on hub
BOOL bData1;
//*****************************************************************************************
// Byte Read from SL811H
// a = register address
// return = data in register
//*****************************************************************************************
BYTE SL811Read(BYTE a)
{
SL811H_ADDR = a;
return (SL811H_DATA);
}
//*****************************************************************************************
// Byte Write to SL811H
// a = register address
// d = data to be written to this register address
//*****************************************************************************************
void SL811Write(BYTE a, BYTE d)
{
SL811H_ADDR = a;
SL811H_DATA = d;
}
//*****************************************************************************************
// Buffer Read from SL811H
// addr = buffer start address
// s = return buffer address where data are to be save/read
// c = buffer data length
//*****************************************************************************************
void SL811BufRead(BYTE addr, BYTE *s, BYTE c)
{
SL811H_ADDR = addr;
while (c--)
*s++ = SL811H_DATA;
}
//*****************************************************************************************
// Buffer Write to SL811H
// addr = buffer start address
// s = buffer address where data are to be written
// c = buffer data length
//*****************************************************************************************
void SL811BufWrite(BYTE addr, BYTE *s, BYTE c)
{
SL811H_ADDR = addr;
while (c--)
SL811H_DATA = *s++;
}
//*****************************************************************************************
// Swap high and low byte
//*****************************************************************************************
WORD WordSwap(WORD input)
{
return(((input&0x00FF)<<8)|((input&0xFF00)>>8));
}
//*****************************************************************************************
// UsbReset during enumeration of device attached directly to SL811HS
//*****************************************************************************************
void USBReset()
{
BYTE tmp;
tmp = SL811Read(CtrlReg);
SL811Write(CtrlReg,tmp|0x08);
USB_Delay(25);
SL811Write(CtrlReg,tmp);
}
//*****************************************************************************************
// usbXfer:
// successful transfer = return TRUE
// fail transfer = return FALSE
//*****************************************************************************************
int usbXfer(BYTE usbaddr, BYTE endpoint, BYTE pid, BYTE iso, WORD wPayload, WORD wLen, BYTE *buffer)
{
BYTE xdata cmd, result, timeout, intr;
BYTE xdata xferLen, bufLen, data0, data1, dataX, addr;
//------------------------------------------------
// Default setting for usb trasnfer
//------------------------------------------------
bufLen = dataX = timeout = 0; //reset all
data0 = EP0_Buf; // DATA0 buffer address
data1 = data0 + (BYTE)wPayload; // DATA1 buffer address
DATA_STOP = TIMEOUT_ERR = FALSE; // set default conditions
//------------------------------------------------
// Define data transfer payload
//------------------------------------------------
if (wLen >= wPayload) // select proper data payload
xferLen = wPayload; // limit to wPayload size
else // else take < payload len
xferLen = wLen; //
//------------------------------------------------
// For IN token
//------------------------------------------------
if (pid==PID_IN) // for current IN tokens
{ //
if(FULL_SPEED) //
cmd = sDATA0_RD; // FS/FS on Hub, sync to sof
else // LS, no sync to sof for IN
cmd = DATA0_RD; //
}
//------------------------------------------------
// For OUT token
//------------------------------------------------
else if(pid==PID_OUT) // for OUT tokens
{
if(xferLen) // only when there are
SL811BufWrite(data0,buffer,xferLen); // data to transfer on USB
if(FULL_SPEED)
cmd = sDATA0_WR; // FS/FS on Hub, sync to sof
else // LS, no sync to sof for OUT
cmd = DATA0_WR;
// implement data toggle
bData1 = uDev[usbaddr].bData1[endpoint];
uDev[usbaddr].bData1[endpoint] = (uDev[usbaddr].bData1[endpoint] ? 0 : 1); // DataToggle
if(bData1)
cmd |= 0x40; // Set Data1 bit in command
}
//------------------------------------------------
// For SETUP/OUT token
//------------------------------------------------
else // for current SETUP/OUT tokens
{
if(xferLen) // only when there are
SL811BufWrite(data0,buffer,xferLen); // data to transfer on USB
if(FULL_SPEED)
cmd = sDATA0_WR; // FS/FS on Hub, sync to sof
else // LS, no sync to sof for OUT
cmd = DATA0_WR;
}
//------------------------------------------------
// Isochronous data transfer setting
//------------------------------------------------
if (iso)
cmd |= ISO_BIT; // if iso setup ISO mode
//------------------------------------------------
// For EP0's IN/OUT token data, start with DATA1
// Control Endpoint0's status stage.
// For data endpoint, IN/OUT data, start ????
//------------------------------------------------
if (endpoint == 0 && pid != PID_SETUP) // for Ep0's IN/OUT token
cmd |= 0x40; // always set DATA1
//------------------------------------------------
// Arming of USB data transfer for the first pkt
//------------------------------------------------
SL811Write(EP0Status,((endpoint&0x0F)|pid)); // PID + EP address
SL811Write(EP0Counter,usbaddr); // USB address
SL811Write(EP0Address,data0); // buffer address, start with "data0"
SL811Write(EP0XferLen,xferLen); // data transfer length
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status
SL811Write(EP0Control,cmd); // Enable ARM and USB transfer start here
//------------------------------------------------
// Main loop for completing a wLen data trasnfer
//------------------------------------------------
while(TRUE)
{
//---------------Wait for done interrupt------------------
while(TRUE) // always ensure requested device is
{ // inserted at all time, then you will
intr = SL811Read(IntStatus); // wait for interrupt to be done, and
if((intr & USB_RESET) || (intr & INSERT_REMOVE)) // proceed to parse result from slave
{ // device.
DATA_STOP = TRUE; // if device is removed, set DATA_STOP
return FALSE; // flag true, so that main loop will
} // know this condition and exit gracefully
if(intr & USB_A_DONE)
break; // interrupt done !!!
}
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status
result = SL811Read(EP0Status); // read EP0status register
remainder = SL811Read(EP0Counter); // remainder value in last pkt xfer
//-------------------------ACK----------------------------
if (result & EP0_ACK) // Transmission ACK
{
// SETUP TOKEN
if(pid == PID_SETUP) // do nothing for SETUP/OUT token
break; // exit while(1) immediately
// OUT TOKEN
else if(pid == PID_OUT)
{
wLen -= (WORD)xferLen; // update remainding wLen value
bufLen = xferLen;
if(wLen){
uDev[usbaddr].bData1[endpoint] = (uDev[usbaddr].bData1[endpoint] ? 0 : 1); // DataToggle
cmd ^= 0x40; // toggle DATA0/DATA1
dataX++; // point to next dataX
addr = (dataX & 1) ? data1:data0; // select next address for data
xferLen = (BYTE)(wLen>=wPayload) ? wPayload:wLen; // get data length required
buffer += bufLen;
SL811BufWrite(addr,buffer,xferLen); // data to transfer on USB
SL811Write(EP0XferLen, xferLen); // select next xfer length
SL811Write(EP0Address, addr); // data buffer addr
SL811Write(IntStatus,INT_CLEAR); // is a LS is on Hub.
SL811Write(EP0Control,cmd); // Enable USB transfer and re-arm
}
else
break;
}
// IN TOKEN
else if(pid == PID_IN)
{ // for IN token only
wLen -= (WORD)xferLen; // update remainding wLen value
cmd ^= 0x40; // toggle DATA0/DATA1
dataX++; // point to next dataX
//------------------------------------------------
// If host requested for more data than the slave
// have, and if the slave's data len is a multiple
// of its endpoint payload size/last xferLen. Do
// not overwrite data in previous buffer.
//------------------------------------------------
if(remainder==xferLen) // empty data detected
bufLen = 0; // do not overwriten previous data
else // reset bufLen to zero
bufLen = xferLen; // update previous buffer length
//------------------------------------------------
// Arm for next data transfer when requested data
// length have not reach zero, i.e. wLen!=0, and
// last xferlen of data was completed, i.e.
// remainder is equal to zero, not a short pkt
//------------------------------------------------
if(!remainder && wLen) // remainder==0 when last xferLen
{ // was all completed or wLen!=0
addr = (dataX & 1) ? data1:data0; // select next address for data
xferLen = (BYTE)(wLen>=wPayload) ? wPayload:wLen; // get data length required
if (FULL_SPEED) // sync with SOF transfer
cmd |= 0x20; // always sync SOF when FS, regardless
SL811Write(EP0XferLen, xferLen); // select next xfer length
SL811Write(EP0Address, addr); // data buffer addr
SL811Write(IntStatus,INT_CLEAR); // is a LS is on Hub.
SL811Write(EP0Control,cmd); // Enable USB transfer and re-arm
}
//------------------------------------------------
// Copy last IN token data pkt from prev transfer
// Check if there was data available during the
// last data transfer
//------------------------------------------------
if(bufLen)
{
SL811BufRead(((dataX&1)?data0:data1), buffer, bufLen);
buffer += bufLen;
}
//------------------------------------------------
// Terminate on short packets, i.e. remainder!=0
// a short packet or empty data packet OR when
// requested data len have completed, i.e.wLen=0
// For a LOWSPEED device, the 1st device descp,
// wPayload is default to 64-byte, LS device will
// only send back a max of 8-byte device descp,
// and host detect this as a short packet, and
// terminate with OUT status stage
//------------------------------------------------
if(remainder || !wLen)
break;
}
}
//-------------------------NAK----------------------------
if (result & EP0_NAK) // NAK Detected
{
if(endpoint==0) // on ep0 during enumeration of LS device
{ // happen when slave is not fast enough,
SL811Write(IntStatus,INT_CLEAR); // clear interrupt status, need to
SL811Write(EP0Control,cmd); // re-arm and request for last cmd, IN token
result = 0; // respond to NAK status only
}
else // normal data endpoint, exit now !!! , non-zero ep
break; // main loop control the interval polling
}
//-----------------------TIMEOUT--------------------------
if (result & EP0_TIMEOUT) // TIMEOUT Detected
{
?? 快捷鍵說明
復制代碼
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
Ctrl + =
減小字號
Ctrl + -