2 # GoodFET Client Library for Maxim USB Chips.
4 # (C) 2012 Travis Goodspeed <travis at radiantmachines.com>
6 # This code is being rewritten and refactored. You've been warned!
9 import sys, time, string, cStringIO, struct, glob, os;
11 from GoodFET import GoodFET;
35 rIOPINS1=20 #Same as rIOPINS
53 # R11 EPIRQ register bits
61 # R12 EPIEN register bits
72 # ************************
73 # Standard USB Requests
74 SR_GET_STATUS =0x00 # Get Status
75 SR_CLEAR_FEATURE =0x01 # Clear Feature
76 SR_RESERVED =0x02 # Reserved
77 SR_SET_FEATURE =0x03 # Set Feature
78 SR_SET_ADDRESS =0x05 # Set Address
79 SR_GET_DESCRIPTOR =0x06 # Get Descriptor
80 SR_SET_DESCRIPTOR =0x07 # Set Descriptor
81 SR_GET_CONFIGURATION =0x08 # Get Configuration
82 SR_SET_CONFIGURATION =0x09 # Set Configuration
83 SR_GET_INTERFACE =0x0a # Get Interface
84 SR_SET_INTERFACE =0x0b # Set Interface
86 # Get Descriptor codes
87 GD_DEVICE =0x01 # Get device descriptor: Device
88 GD_CONFIGURATION =0x02 # Get device descriptor: Configuration
89 GD_STRING =0x03 # Get device descriptor: String
90 GD_HID =0x21 # Get descriptor: HID
91 GD_REPORT =0x22 # Get descriptor: Report
93 # SETUP packet header offsets
103 # HID bRequest values
161 # Host XFR token values for writing the HXFR register (R30).
162 # OR this bit field with the endpoint number in bits 3:0
163 tokSETUP =0x10 # HS=0, ISO=0, OUTNIN=0, SETUP=1
164 tokIN =0x00 # HS=0, ISO=0, OUTNIN=0, SETUP=0
165 tokOUT =0x20 # HS=0, ISO=0, OUTNIN=1, SETUP=0
166 tokINHS =0x80 # HS=1, ISO=0, OUTNIN=0, SETUP=0
167 tokOUTHS =0xA0 # HS=1, ISO=0, OUTNIN=1, SETUP=0
168 tokISOIN =0x40 # HS=0, ISO=1, OUTNIN=0, SETUP=0
169 tokISOOUT =0x60 # HS=0, ISO=1, OUTNIN=1, SETUP=0
176 # Host error result codes, the 4 LSB's in the HRSL register.
195 bmBUSEVENTIRQ =0x01 # indicates BUS Reset Done or BUS Resume
204 class GoodFETMAXUSB(GoodFET):
207 def service_irqs(self):
208 """Handle USB interrupt events."""
209 epirq=self.rreg(rEPIRQ);
210 usbirq=self.rreg(rUSBIRQ);
213 #Are we being asked for setup data?
214 if(epirq&bmSUDAVIRQ): #Setup Data Requested
215 self.wreg(rEPIRQ,bmSUDAVIRQ); #Clear the bit
217 if(epirq&bmOUT1DAVIRQ): #OUT1-OUT packet
219 self.wreg(rEPIRQ,bmOUT1DAVIRQ); #Clear the bit *AFTER* servicing.
220 if(epirq&bmIN3BAVIRQ): #IN3-IN packet
222 self.wreg(rEPIRQ,bmIN3BAVIRQ); #Clear the bit
223 if(epirq&bmIN2BAVIRQ): #IN2 packet
225 self.wreg(rEPIRQ,bmIN2BAVIRQ); #Clear the bit
227 # print "No idea how to service this IRQ: %02x" % epirq;
234 print "Ignoring an OUT1 interrupt.";
235 def setup2str(self,SUD):
236 """Converts the header of a setup packet to a string."""
237 return "bmRequestType=0x%02x, bRequest=0x%02x, wValue=0x%04x, wIndex=0x%04x, wLength=0x%04x" % (
238 ord(SUD[0]), ord(SUD[1]),
239 ord(SUD[2])+(ord(SUD[3])<<8),
240 ord(SUD[4])+(ord(SUD[5])<<8),
241 ord(SUD[6])+(ord(SUD[7])<<8)
244 def MAXUSBsetup(self):
245 """Move the FET into the MAXUSB application."""
246 self.writecmd(self.MAXUSBAPP,0x10,0,self.data); #MAXUSB/SETUP
247 print "Connected to MAX342x Rev. %x" % (self.rreg(rREVISION));
248 self.wreg(rPINCTL,0x18); #Set duplex and negative INT level.
250 def MAXUSBtrans8(self,byte):
251 """Read and write 8 bits by MAXUSB."""
252 data=self.MAXUSBtrans([byte]);
255 def MAXUSBtrans(self,data):
256 """Exchange data by MAXUSB."""
258 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
262 """Peek 8 bits from a register."""
264 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
265 return ord(self.data[1]);
266 def rregAS(self,reg):
267 """Peek 8 bits from a register, setting AS."""
269 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
270 return ord(self.data[1]);
271 def wreg(self,reg,value):
272 """Poke 8 bits into a register."""
273 data=[(reg<<3)|2,value];
274 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
276 def wregAS(self,reg,value):
277 """Poke 8 bits into a register, setting AS."""
278 data=[(reg<<3)|3,value];
279 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
281 def readbytes(self,reg,length):
282 """Peek some bytes from a register."""
283 data=[(reg<<3)]+range(0,length);
284 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
285 toret=self.data[1:len(self.data)];
288 ashex=ashex+(" %02x"%ord(foo));
289 print "GET %02x==%s" % (reg,ashex);
291 def readbytesAS(self,reg,length):
292 """Peek some bytes from a register, acking prior transfer."""
293 data=[(reg<<3)|1]+range(0,length);
294 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
295 toret=self.data[1:len(self.data)];
298 ashex=ashex+(" %02x"%ord(foo));
299 print "GETAS %02x==%s" % (reg,ashex);
301 def ctl_write_nd(self,request):
302 """Control Write with no data stage. Assumes PERADDR is set
303 and the SUDFIFO contains the 8 setup bytes. Returns with
304 result code = HRSLT[3:0] (HRSL register). If there is an
305 error, the 4MSBits of the returned value indicate the stage 1
308 # 1. Send the SETUP token and 8 setup bytes.
309 # Should ACK immediately.
310 self.writebytes(rSUDFIFO,request);
311 resultcode=self.send_packet(tokSETUP,0); #SETUP packet to EP0.
312 if resultcode: return resultcode;
314 # 2. No data stage, so the last operation is to send an IN
315 # token to the peripheral as the STATUS (handhsake) stage of
316 # this control transfer. We should get NAK or the DATA1 PID.
317 # When we get back to the DATA1 PID the 3421 automatically
318 # sends the closing NAK.
319 resultcode=self.send_packet(tokINHS,0); #Function takes care of retries.
320 if resultcode: return resultcode;
325 def ctl_read(self,request):
326 """Control read transfer, used in Host mode."""
328 bytes_to_read=request[6]+256*request[7];
331 self.writebytes(rSUDFIFO,request); #Load the FIFO
332 resultcode=self.send_packet(tokSETUP,0); #SETUP packet to EP0
334 print "Failed to get ACK on SETUP request in ctl_read()."
337 self.wreg(rHCTL,bmRCVTOG1); #FIRST data packet in CTL transfer uses DATA1 toggle.
338 resultcode=self.IN_Transfer(0,bytes_to_read);
340 print "Failed on IN Transfer in ctl_read()";
343 self.IN_nak_count=self.nak_count;
345 #The OUT status stage.
346 resultcode=self.send_packet(tokOUTHS,0);
348 print "Failed on OUT Status stage in ctl_read()";
353 xfrdata=[]; #Ugly variable used only by a few functions. FIXME
354 def IN_Transfer(self,endpoint,INbytes):
355 """Does an IN transfer to an endpoint, used for Host mode."""
361 resultcode=self.send_packet(tokIN,endpoint); #IN packet to EP. NAKS taken care of.
362 if resultcode: return resultcode;
364 pktsize=self.rreg(rRCVBC); #Numer of RXed bytes.
366 #Very innefficient, move this to C if performance is needed.
367 for j in range(0,pktsize):
368 self.xfrdata=self.xfrdata+[self.rreg(rRCVFIFO)];
369 xfrsize=self.xfrdata[0];
370 self.wreg(rHIRQ,bmRCVDAVIRQ); #Clear IRQ
371 xfrlen=xfrlen+pktsize; #Add byte count to total transfer length.
373 print "%i / %i" % (xfrlen,xfrsize)
375 #Packet is complete if:
376 # 1. The device sent a short packet, <maxPacketSize
377 # 2. INbytes have been transfered.
378 if (pktsize<self.maxPacketSize) or (xfrlen>=xfrsize):
379 self.last_transfer_size=xfrlen;
381 for foo in self.xfrdata:
382 ashex=ashex+(" %02x"%foo);
383 print "INPACKET EP%i==%s (0x%02x bytes remain)" % (endpoint,ashex,xfrsize);
388 def send_packet(self,token,endpoint):
389 """Send a packet to an endpoint as the Host, taking care of NAKs.
390 Don't use this for device code."""
394 #Repeat until NAK_LIMIT or RETRY_LIMIT is reached.
395 while self.nak_count<self.NAK_LIMIT and self.retry_count<self.RETRY_LIMIT:
396 self.wreg(rHXFR,(token|endpoint)); #launch the transfer
397 while not (self.rreg(rHIRQ) & bmHXFRDNIRQ):
398 # wait for the completion IRQ
400 self.wreg(rHIRQ,bmHXFRDNIRQ); #Clear IRQ
401 resultcode = (self.rreg(rHRSL) & 0x0F); # get the result
402 if (resultcode==hrNAK):
403 self.nak_count=self.nak_count+1;
404 elif (resultcode==hrTIMEOUT):
405 self.retry_count=self.retry_count+1;
411 def writebytes(self,reg,tosend):
412 """Poke some bytes into a register."""
414 if type(tosend)==str:
415 data=chr((reg<<3)|3)+tosend;
416 print "PUT %02x:=%s (0x%02x bytes)" % (reg,tosend,len(data))
418 data=[(reg<<3)|3]+tosend;
421 ashex=ashex+(" %02x"%foo);
422 print "PUT %02x:=%s (0x%02x bytes)" % (reg,ashex,len(data))
423 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
424 def usb_connect(self):
425 """Connect the USB port."""
427 #disconnect D+ pullup if host turns off VBUS
428 self.wreg(rUSBCTL,bmVBGATE|bmCONNECT);
429 def usb_disconnect(self):
430 """Disconnect the USB port."""
431 self.wreg(rUSBCTL,bmVBGATE);
432 def STALL_EP0(self,SUD=None):
433 """Stall for an unknown SETUP event."""
435 print "Stalling EP0.";
437 print "Stalling EPO for %s" % self.setup2str(SUD);
438 self.wreg(rEPSTALLS,0x23); #All three stall bits.
439 def SETBIT(self,reg,val):
440 """Set a bit in a register."""
441 self.wreg(reg,self.rreg(reg)|val);
443 """Turn on the target device."""
444 self.wreg(rIOPINS2,(self.rreg(rIOPINS2)|0x08));
446 """Turn off the target device's power."""
447 self.wreg(rIOPINS2,0x00);
448 def reset_host(self):
449 """Resets the chip into host mode."""
450 self.wreg(rUSBCTL,bmCHIPRES); #Stop the oscillator.
451 self.wreg(rUSBCTL,0x00); #restart it.
452 while self.rreg(rUSBIRQ)&bmOSCOKIRQ:
453 #Hang until the PLL stabilizes.
456 class GoodFETMAXUSBHost(GoodFETMAXUSB):
457 """This is a class for implemented a minimal USB host.
458 It's intended for fuzzing, rather than for daily use."""
460 """Initialize the MAX3421 as a USB Host."""
462 self.wreg(rPINCTL,(bmFDUPSPI|bmPOSINT));
470 """Run as a minimal host and dump the config tables."""
472 self.detect_device();
474 self.enumerate_device();
475 self.wait_for_disconnect();
476 def detect_device(self):
477 """Waits for a device to be inserted and then returns."""
480 #Activate host mode and turn on 15K pulldown resistors on D+ and D-.
481 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST));
482 #Clear connection detect IRQ.
483 self.wreg(rHIRQ,bmCONDETIRQ);
485 print "Waiting for a device connection.";
487 self.wreg(rHCTL,bmSAMPLEBUS); #Update JSTATUS and KSTATUS bits.
488 busstate=self.rreg(rHRSL) & (bmJSTATUS|bmKSTATUS);
490 if busstate==bmJSTATUS:
491 print "Detected Full-Speed Device.";
492 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST|bmSOFKAENAB));
493 elif busstate==bmKSTATUS:
494 print "Detected Low-Speed Device.";
495 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST|bmLOWSPEED|bmSOFKAENAB));
497 print "Not sure whether this is Full-Speed or Low-Speed. Please investigate.";
498 def wait_for_disconnect(self):
499 """Wait for a device to be disconnected."""
500 print "Waiting for a device disconnect.";
502 self.wreg(rHIRQ,bmCONDETIRQ); #Clear disconnect IRQ
503 while not (self.rreg(rHIRQ) & bmCONDETIRQ):
504 #Wait for IRQ to change.
508 self.wreg(rMODE,bmDPPULLDN|bmDMPULLDN|bmHOST);
509 print "Device disconnected.";
510 self.wreg(rIOPINS2,(self.rreg(rIOPINS2) & ~0x04)); #HL1_OFF
511 self.wreg(rIOPINS1,(self.rreg(rIOPINS1) & ~0x02)); #HL4_OFF
513 def enumerate_device(self):
514 """Enumerates a device on the present port."""
516 Set_Address_to_7 = [0x00,0x05,0x07,0x00,0x00,0x00,0x00,0x00];
517 Get_Descriptor_Device = [0x80,0x06,0x00,0x01,0x00,0x00,0x00,0x00]; #len filled in
518 Get_Descriptor_Config = [0x80,0x06,0x00,0x02,0x00,0x00,0x00,0x00];
521 print "Issuing USB bus reset.";
522 self.wreg(rHCTL,bmBUSRST);
523 while self.rreg(rHCTL) & bmBUSRST:
524 #Wait for reset to complete.
529 #Get the device descriptor.
530 self.wreg(rPERADDR,0); #First request to address 0.
531 self.maxPacketSize=8; #Only safe value for first check.
532 Get_Descriptor_Device[6]=8; # wLengthL
533 Get_Descriptor_Device[7]=0; # wLengthH
535 print "Fetching 8 bytes of Device Descriptor.";
536 self.ctl_read(Get_Descriptor_Device); # Get device descriptor into self.xfrdata;
537 self.maxPacketSize=self.xfrdata[7];
538 print "EP0 maxPacketSize is %02i bytes." % self.maxPacketSize;
540 # Issue another USB bus reset
541 print "Resetting the bus again."
542 self.wreg(rHCTL,bmBUSRST);
543 while self.rreg(rHCTL) & bmBUSRST:
544 #Wait for reset to complete.
548 # Set_Address to 7 (Note: this request goes to address 0, already set in PERADDR register).
549 print "Setting address to 0x07";
550 HR = self.ctl_write_nd(Set_Address_to_7); # CTL-Write, no data stage
551 #if(print_error(HR)) return;
553 time.sleep(0.002); # Device gets 2 msec recovery time
554 self.wreg(rPERADDR,7); # now all transfers go to addr 7
557 #Get the device descriptor at the assigned address.
558 Get_Descriptor_Device[6]=0x12; #Fill in real descriptor length.
559 print "Fetching Device Descriptor."
560 self.ctl_read(Get_Descriptor_Device); #Result in self.xfrdata;
562 self.descriptor=self.xfrdata;
563 self.VID = self.xfrdata[8] + 256*self.xfrdata[9];
564 self.PID = self.xfrdata[10]+ 256*self.xfrdata[11];
565 iMFG = self.xfrdata[14];
566 iPROD = self.xfrdata[15];
567 iSERIAL = self.xfrdata[16];
569 self.manufacturer=self.getDescriptorString(iMFG);
570 self.product=self.getDescriptorString(iPROD);
571 self.serial=self.getDescriptorString(iSERIAL);
575 def printstrings(self):
576 print "Vendor ID is %04x." % self.VID;
577 print "Product ID is %04x." % self.PID;
578 print "Manufacturer: %s" % self.manufacturer;
579 print "Product: %s" % self.product;
580 print "Serial: %s" % self.serial;
582 def getDescriptorString(self, index):
583 """Grabs a string from the descriptor string table."""
584 # Get_Descriptor-String template. Code fills in idx at str[2].
585 Get_Descriptor_String = [0x80,0x06,index,0x03,0x00,0x00,0x40,0x00];
587 if index==0: return "MISSING STRING";
589 status=self.ctl_read(Get_Descriptor_String);
590 if status: return None;
592 #Since we've got a string
594 for c in self.xfrdata[2:len(self.xfrdata)]:
595 if c>0: toret=toret+chr(c);
597 class GoodFETMAXUSBDevice(GoodFETMAXUSB):
599 def send_descriptor(self,SUD):
600 """Send the USB descriptors based upon the setup data."""
602 reqlen=ord(SUD[wLengthL])+256*ord(SUD[wLengthH]); #16-bit length
603 desctype=ord(SUD[wValueH]);
605 if desctype==GD_DEVICE:
608 elif desctype==GD_CONFIGURATION:
611 elif desctype==GD_STRING:
612 desclen=ord(self.strDesc[ord(SUD[wValueL])][0]);
613 ddata=self.strDesc[ord(SUD[wValueL])];
615 #TODO Configuration, String, Hid, and Report
618 sendlen=min(reqlen,desclen);
619 self.writebytes(rEP0FIFO,ddata);
620 #self.wregAS(rEP0BC,sendlen);
621 self.wregAS(rEP0BC,desclen);
623 print "Stalling in send_descriptor() for lack of handler for %02x." % desctype;
625 def set_configuration(self,SUD):
626 """Set the configuration."""
628 configval=ord(SUD[wValueL]);
630 self.SETBIT(rUSBIEN,bmSUSPIE);
631 self.rregAS(rFNADDR);
632 class GoodFETMAXUSBHID(GoodFETMAXUSBDevice):
633 """This is an example HID keyboard driver, loosely based on the
636 """Initialize a USB HID device."""
637 self.usb_disconnect();
643 """Main loop of the USB HID emulator."""
644 print "Starting a HID device. This won't return.";
648 """Handle USB Enumeration"""
650 #Grab the SETUP packet from the buffer.
651 SUD=self.readbytes(rSUDFIFO,8);
653 #Parse the SETUP packet
654 print "Handling a setup packet of %s" % self.setup2str(SUD);
656 setuptype=(ord(SUD[bmRequestType])&0x60);
658 self.std_request(SUD);
659 elif setuptype==0x20:
660 self.class_request(SUD);
661 elif setuptype==0x40:
662 self.vendor_request(SUD);
664 print "Unknown request type 0x%02x." % ord(SUD[bmRequestType])
666 def class_request(self,SUD):
667 """Handle a class request."""
668 print "Stalling a class request.";
670 def vendor_request(self,SUD):
671 print "Stalling a vendor request.";
673 def std_request(self,SUD):
674 """Handles a standard setup request."""
675 setuptype=ord(SUD[bRequest]);
676 if setuptype==SR_GET_DESCRIPTOR: self.send_descriptor(SUD);
677 #elif setuptype==SR_SET_FEATURE:
678 # self.rregAS(rFNADDR);
680 elif setuptype==SR_SET_CONFIGURATION: self.set_configuration(SUD);
681 elif setuptype==SR_GET_STATUS: self.get_status(SUD);
682 elif setuptype==SR_SET_ADDRESS: self.rregAS(rFNADDR);
683 elif setuptype==SR_GET_INTERFACE: self.get_interface(SUD);
685 print "Stalling Unknown standard setup request type %02x" % setuptype;
688 def get_interface(self,SUD):
689 """Handles a setup request for SR_GET_INTERFACE."""
690 if ord(SUD[wIndexL]==0):
691 self.wreg(rEP0FIFO,0);
692 self.wregAS(rEP0BC,1);
697 DD=[0x12, # bLength = 18d
698 0x01, # bDescriptorType = Device (1)
699 0x00,0x01, # bcdUSB(L/H) USB spec rev (BCD)
700 0x00,0x00,0x00, # bDeviceClass, bDeviceSubClass, bDeviceProtocol
701 0x40, # bMaxPacketSize0 EP0 is 64 bytes
702 0x6A,0x0B, # idVendor(L/H)--Maxim is 0B6A
703 0x46,0x53, # idProduct(L/H)--5346
704 0x34,0x12, # bcdDevice--1234
705 1,2,3, # iManufacturer, iProduct, iSerialNumber
707 #Configuration Descriptor
709 0x02, # bDescriptorType = Config
710 0x22,0x00, # wTotalLength(L/H) = 34 bytes
711 0x01, # bNumInterfaces
713 0x00, # iConfiguration
714 0xE0, # bmAttributes. b7=1 b6=self-powered b5=RWU supported
715 0x01, # MaxPower is 2 ma
716 # INTERFACE Descriptor
720 0x00, # bAlternate Setting
721 0x01, # bNum Endpoints
722 0x03, # bInterfaceClass = HID
723 0x00,0x00, # bInterfaceSubClass, bInterfaceProtocol
725 # HID Descriptor--It's at CD[18]
727 0x21, # bDescriptorType = HID
728 0x10,0x01, # bcdHID(L/H) Rev 1.1
729 0x00, # bCountryCode (none)
730 0x01, # bNumDescriptors (one report descriptor)
731 0x22, # bDescriptorType (report)
732 43,0, # CD[25]: wDescriptorLength(L/H) (report descriptor size is 43 bytes)
733 # Endpoint Descriptor
735 0x05, # bDescriptorType (Endpoint)
736 0x83, # bEndpointAddress (EP3-IN)
737 0x03, # bmAttributes (interrupt)
738 64,0, # wMaxPacketSize (64)
741 # STRING descriptor 0--Language string
745 # 0x03, # bDescriptorType = string
746 # 0x09,0x04 # wLANGID(L/H) = English-United Sates
748 # STRING descriptor 1--Manufacturer ID
749 "\x0c\x03M\x00a\x00x\x00i\x00m\x00",
752 # 0x03, # bDescriptorType = string
753 # 'M',0,'a',0,'x',0,'i',0,'m',0 # text in Unicode
755 # STRING descriptor 2 - Product ID
756 "\x18\x03M\x00A\x00X\x003\x004\x002\x000\x00E\x00 \x00E\x00n\x00u\x00m\x00 \x00C\x00o\x00d\x00e\x00",
758 # 0x03, # bDescriptorType = string
759 # 'M',0,'A',0,'X',0,'3',0,'4',0,'2',0,'0',0,'E',0,' ',0,
760 # 'E',0,'n',0,'u',0,'m',0,' ',0,'C',0,'o',0,'d',0,'e',0
764 # STRING descriptor 3 - Serial Number ID
765 "\x14\x03S\x00/\x00N\x00 \x003\x004\x002\x000\x00E\x00"
767 # 0x03, # bDescriptorType = string
780 0x05,0x01, # Usage Page (generic desktop)
781 0x09,0x06, # Usage (keyboard)
782 0xA1,0x01, # Collection
783 0x05,0x07, # Usage Page 7 (keyboard/keypad)
784 0x19,0xE0, # Usage Minimum = 224
785 0x29,0xE7, # Usage Maximum = 231
786 0x15,0x00, # Logical Minimum = 0
787 0x25,0x01, # Logical Maximum = 1
788 0x75,0x01, # Report Size = 1
789 0x95,0x08, # Report Count = 8
790 0x81,0x02, # Input(Data,Variable,Absolute)
791 0x95,0x01, # Report Count = 1
792 0x75,0x08, # Report Size = 8
793 0x81,0x01, # Input(Constant)
794 0x19,0x00, # Usage Minimum = 0
795 0x29,0x65, # Usage Maximum = 101
796 0x15,0x00, # Logical Minimum = 0,
797 0x25,0x65, # Logical Maximum = 101
798 0x75,0x08, # Report Size = 8
799 0x95,0x01, # Report Count = 1
800 0x81,0x00, # Input(Data,Variable,Array)
803 def get_status(self,SUD):
804 """Get the USB Setup Status."""
805 testbyte=ord(SUD[bmRequestType])
809 self.wreg(rEP0FIFO,0x03); #Enable RWU and self-powered
810 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
811 self.wregAS(rEP0BC,2); #Load byte count, arm transfer, and ack CTL.
814 self.wreg(rEP0FIFO,0x00);
815 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
816 self.wregAS(rEP0BC,2);
819 if(ord(SUD[wIndexL])==0x83):
820 self.wreg(rEP0FIFO,0x01); #Stall EP3
821 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
822 self.wregAS(rEP0BC,2);
831 typestring=" Python does USB HID!";
834 def asc2hid(self,ascii):
835 """Translate ASCII to an USB keycode."""
837 if a>='a' and a<='z':
838 return ord(a)-ord('a')+4;
839 elif a>='A' and a<='Z':
840 return ord(a)-ord('A')+4;
846 """Type next letter in buffer."""
847 if self.typepos>=len(self.typestring):
849 elif self.typephase==0:
854 self.typeletter(self.typestring[self.typepos]);
855 self.typepos=self.typepos+1;
857 def typeletter(self,key):
858 """Type a letter on IN3. Zero for keyup."""
859 #if type(key)==str: key=ord(key);
861 self.wreg(rEP3INFIFO,0);
862 self.wreg(rEP3INFIFO,0);
863 self.wreg(rEP3INFIFO,self.asc2hid(key));
864 self.wreg(rEP3INBC,3);
866 """Handle IN3 event."""
867 #Don't bother clearing interrupt flag, that's done by sending the reply.