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 # Note *very* well that these interrupts are handled in order.
214 # You might need to alter the order or swap the elif
215 # statements for if statements.
217 #Are we being asked for setup data?
218 if(epirq&bmSUDAVIRQ): #Setup Data Requested
219 self.wreg(rEPIRQ,bmSUDAVIRQ); #Clear the bit
221 if(epirq&bmOUT1DAVIRQ): #OUT1-OUT packet
223 self.wregAS(rEPIRQ,bmOUT1DAVIRQ); #Clear the bit *AFTER* servicing.
224 if(epirq&bmIN3BAVIRQ): #IN3-IN packet
226 self.wreg(rEPIRQ,bmIN3BAVIRQ); #Clear the bit
227 if(epirq&bmIN2BAVIRQ): #IN2 packet
229 self.wreg(rEPIRQ,bmIN2BAVIRQ); #Clear the bit
231 # print "No idea how to service this IRQ: %02x" % epirq;
238 print "Ignoring an OUT1 interrupt.";
239 def setup2str(self,SUD):
240 """Converts the header of a setup packet to a string."""
241 return "bmRequestType=0x%02x, bRequest=0x%02x, wValue=0x%04x, wIndex=0x%04x, wLength=0x%04x" % (
242 ord(SUD[0]), ord(SUD[1]),
243 ord(SUD[2])+(ord(SUD[3])<<8),
244 ord(SUD[4])+(ord(SUD[5])<<8),
245 ord(SUD[6])+(ord(SUD[7])<<8)
248 def MAXUSBsetup(self):
249 """Move the FET into the MAXUSB application."""
250 self.writecmd(self.MAXUSBAPP,0x10,0,self.data); #MAXUSB/SETUP
251 print "Connected to MAX342x Rev. %x" % (self.rreg(rREVISION));
252 self.wreg(rPINCTL,0x18); #Set duplex and negative INT level.
254 def MAXUSBtrans8(self,byte):
255 """Read and write 8 bits by MAXUSB."""
256 data=self.MAXUSBtrans([byte]);
259 def MAXUSBtrans(self,data):
260 """Exchange data by MAXUSB."""
262 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
266 """Peek 8 bits from a register."""
268 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
269 return ord(self.data[1]);
270 def rregAS(self,reg):
271 """Peek 8 bits from a register, setting AS."""
273 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
274 return ord(self.data[1]);
275 def wreg(self,reg,value):
276 """Poke 8 bits into a register."""
277 data=[(reg<<3)|2,value];
278 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
280 def wregAS(self,reg,value):
281 """Poke 8 bits into a register, setting AS."""
282 data=[(reg<<3)|3,value];
283 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
285 def readbytes(self,reg,length):
286 """Peek some bytes from a register."""
287 data=[(reg<<3)]+range(0,length);
288 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
289 toret=self.data[1:len(self.data)];
292 ashex=ashex+(" %02x"%ord(foo));
293 print "GET %02x==%s" % (reg,ashex);
295 def readbytesAS(self,reg,length):
296 """Peek some bytes from a register, acking prior transfer."""
297 data=[(reg<<3)|1]+range(0,length);
298 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
299 toret=self.data[1:len(self.data)];
302 ashex=ashex+(" %02x"%ord(foo));
303 print "GET %02x==%s" % (reg,ashex);
305 def ctl_write_nd(self,request):
306 """Control Write with no data stage. Assumes PERADDR is set
307 and the SUDFIFO contains the 8 setup bytes. Returns with
308 result code = HRSLT[3:0] (HRSL register). If there is an
309 error, the 4MSBits of the returned value indicate the stage 1
312 # 1. Send the SETUP token and 8 setup bytes.
313 # Should ACK immediately.
314 self.writebytes(rSUDFIFO,request);
315 resultcode=self.send_packet(tokSETUP,0); #SETUP packet to EP0.
316 if resultcode: return resultcode;
318 # 2. No data stage, so the last operation is to send an IN
319 # token to the peripheral as the STATUS (handhsake) stage of
320 # this control transfer. We should get NAK or the DATA1 PID.
321 # When we get back to the DATA1 PID the 3421 automatically
322 # sends the closing NAK.
323 resultcode=self.send_packet(tokINHS,0); #Function takes care of retries.
324 if resultcode: return resultcode;
329 def ctl_read(self,request):
330 """Control read transfer, used in Host mode."""
332 bytes_to_read=request[6]+256*request[7];
335 self.writebytes(rSUDFIFO,request); #Load the FIFO
336 resultcode=self.send_packet(tokSETUP,0); #SETUP packet to EP0
338 print "Failed to get ACK on SETUP request in ctl_read()."
341 self.wreg(rHCTL,bmRCVTOG1); #FIRST data packet in CTL transfer uses DATA1 toggle.
342 resultcode=self.IN_Transfer(0,bytes_to_read);
344 print "Failed on IN Transfer in ctl_read()";
347 self.IN_nak_count=self.nak_count;
349 #The OUT status stage.
350 resultcode=self.send_packet(tokOUTHS,0);
352 print "Failed on OUT Status stage in ctl_read()";
357 xfrdata=[]; #Ugly variable used only by a few functions. FIXME
358 def IN_Transfer(self,endpoint,INbytes):
359 """Does an IN transfer to an endpoint, used for Host mode."""
365 resultcode=self.send_packet(tokIN,endpoint); #IN packet to EP. NAKS taken care of.
366 if resultcode: return resultcode;
368 pktsize=self.rreg(rRCVBC); #Numer of RXed bytes.
370 #Very innefficient, move this to C if performance is needed.
371 for j in range(0,pktsize):
372 self.xfrdata=self.xfrdata+[self.rreg(rRCVFIFO)];
373 xfrsize=self.xfrdata[0];
374 self.wreg(rHIRQ,bmRCVDAVIRQ); #Clear IRQ
375 xfrlen=xfrlen+pktsize; #Add byte count to total transfer length.
377 print "%i / %i" % (xfrlen,xfrsize)
379 #Packet is complete if:
380 # 1. The device sent a short packet, <maxPacketSize
381 # 2. INbytes have been transfered.
382 if (pktsize<self.maxPacketSize) or (xfrlen>=xfrsize):
383 self.last_transfer_size=xfrlen;
385 for foo in self.xfrdata:
386 ashex=ashex+(" %02x"%foo);
387 print "INPACKET EP%i==%s (0x%02x bytes remain)" % (endpoint,ashex,xfrsize);
392 def send_packet(self,token,endpoint):
393 """Send a packet to an endpoint as the Host, taking care of NAKs.
394 Don't use this for device code."""
398 #Repeat until NAK_LIMIT or RETRY_LIMIT is reached.
399 while self.nak_count<self.NAK_LIMIT and self.retry_count<self.RETRY_LIMIT:
400 self.wreg(rHXFR,(token|endpoint)); #launch the transfer
401 while not (self.rreg(rHIRQ) & bmHXFRDNIRQ):
402 # wait for the completion IRQ
404 self.wreg(rHIRQ,bmHXFRDNIRQ); #Clear IRQ
405 resultcode = (self.rreg(rHRSL) & 0x0F); # get the result
406 if (resultcode==hrNAK):
407 self.nak_count=self.nak_count+1;
408 elif (resultcode==hrTIMEOUT):
409 self.retry_count=self.retry_count+1;
415 def writebytes(self,reg,tosend):
416 """Poke some bytes into a register."""
418 if type(tosend)==str:
419 data=chr((reg<<3)|3)+tosend;
420 print "PUT %02x:=%s (0x%02x bytes)" % (reg,tosend,len(data))
422 data=[(reg<<3)|3]+tosend;
425 ashex=ashex+(" %02x"%foo);
426 print "PUT %02x:=%s (0x%02x bytes)" % (reg,ashex,len(data))
427 self.writecmd(self.MAXUSBAPP,0x00,len(data),data);
428 def usb_connect(self):
429 """Connect the USB port."""
431 #disconnect D+ pullup if host turns off VBUS
432 self.wreg(rUSBCTL,bmVBGATE|bmCONNECT);
433 def usb_disconnect(self):
434 """Disconnect the USB port."""
435 self.wreg(rUSBCTL,bmVBGATE);
436 def STALL_EP0(self,SUD=None):
437 """Stall for an unknown SETUP event."""
439 print "Stalling EP0.";
441 print "Stalling EPO for %s" % self.setup2str(SUD);
442 self.wreg(rEPSTALLS,0x23); #All three stall bits.
443 def SETBIT(self,reg,val):
444 """Set a bit in a register."""
445 self.wreg(reg,self.rreg(reg)|val);
447 """Turn on the target device."""
448 self.wreg(rIOPINS2,(self.rreg(rIOPINS2)|0x08));
450 """Turn off the target device's power."""
451 self.wreg(rIOPINS2,0x00);
452 def reset_host(self):
453 """Resets the chip into host mode."""
454 self.wreg(rUSBCTL,bmCHIPRES); #Stop the oscillator.
455 self.wreg(rUSBCTL,0x00); #restart it.
456 while self.rreg(rUSBIRQ)&bmOSCOKIRQ:
457 #Hang until the PLL stabilizes.
460 class GoodFETMAXUSBHost(GoodFETMAXUSB):
461 """This is a class for implemented a minimal USB host.
462 It's intended for fuzzing, rather than for daily use."""
464 """Initialize the MAX3421 as a USB Host."""
466 self.wreg(rPINCTL,(bmFDUPSPI|bmPOSINT));
474 """Run as a minimal host and dump the config tables."""
476 self.detect_device();
478 self.enumerate_device();
479 self.wait_for_disconnect();
480 def detect_device(self):
481 """Waits for a device to be inserted and then returns."""
484 #Activate host mode and turn on 15K pulldown resistors on D+ and D-.
485 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST));
486 #Clear connection detect IRQ.
487 self.wreg(rHIRQ,bmCONDETIRQ);
489 print "Waiting for a device connection.";
491 self.wreg(rHCTL,bmSAMPLEBUS); #Update JSTATUS and KSTATUS bits.
492 busstate=self.rreg(rHRSL) & (bmJSTATUS|bmKSTATUS);
494 if busstate==bmJSTATUS:
495 print "Detected Full-Speed Device.";
496 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST|bmSOFKAENAB));
497 elif busstate==bmKSTATUS:
498 print "Detected Low-Speed Device.";
499 self.wreg(rMODE,(bmDPPULLDN|bmDMPULLDN|bmHOST|bmLOWSPEED|bmSOFKAENAB));
501 print "Not sure whether this is Full-Speed or Low-Speed. Please investigate.";
502 def wait_for_disconnect(self):
503 """Wait for a device to be disconnected."""
504 print "Waiting for a device disconnect.";
506 self.wreg(rHIRQ,bmCONDETIRQ); #Clear disconnect IRQ
507 while not (self.rreg(rHIRQ) & bmCONDETIRQ):
508 #Wait for IRQ to change.
512 self.wreg(rMODE,bmDPPULLDN|bmDMPULLDN|bmHOST);
513 print "Device disconnected.";
514 self.wreg(rIOPINS2,(self.rreg(rIOPINS2) & ~0x04)); #HL1_OFF
515 self.wreg(rIOPINS1,(self.rreg(rIOPINS1) & ~0x02)); #HL4_OFF
517 def enumerate_device(self):
518 """Enumerates a device on the present port."""
520 Set_Address_to_7 = [0x00,0x05,0x07,0x00,0x00,0x00,0x00,0x00];
521 Get_Descriptor_Device = [0x80,0x06,0x00,0x01,0x00,0x00,0x00,0x00]; #len filled in
522 Get_Descriptor_Config = [0x80,0x06,0x00,0x02,0x00,0x00,0x00,0x00];
525 print "Issuing USB bus reset.";
526 self.wreg(rHCTL,bmBUSRST);
527 while self.rreg(rHCTL) & bmBUSRST:
528 #Wait for reset to complete.
533 #Get the device descriptor.
534 self.wreg(rPERADDR,0); #First request to address 0.
535 self.maxPacketSize=8; #Only safe value for first check.
536 Get_Descriptor_Device[6]=8; # wLengthL
537 Get_Descriptor_Device[7]=0; # wLengthH
539 print "Fetching 8 bytes of Device Descriptor.";
540 self.ctl_read(Get_Descriptor_Device); # Get device descriptor into self.xfrdata;
541 self.maxPacketSize=self.xfrdata[7];
542 print "EP0 maxPacketSize is %02i bytes." % self.maxPacketSize;
544 # Issue another USB bus reset
545 print "Resetting the bus again."
546 self.wreg(rHCTL,bmBUSRST);
547 while self.rreg(rHCTL) & bmBUSRST:
548 #Wait for reset to complete.
552 # Set_Address to 7 (Note: this request goes to address 0, already set in PERADDR register).
553 print "Setting address to 0x07";
554 HR = self.ctl_write_nd(Set_Address_to_7); # CTL-Write, no data stage
555 #if(print_error(HR)) return;
557 time.sleep(0.002); # Device gets 2 msec recovery time
558 self.wreg(rPERADDR,7); # now all transfers go to addr 7
561 #Get the device descriptor at the assigned address.
562 Get_Descriptor_Device[6]=0x12; #Fill in real descriptor length.
563 print "Fetching Device Descriptor."
564 self.ctl_read(Get_Descriptor_Device); #Result in self.xfrdata;
566 self.descriptor=self.xfrdata;
567 self.VID = self.xfrdata[8] + 256*self.xfrdata[9];
568 self.PID = self.xfrdata[10]+ 256*self.xfrdata[11];
569 iMFG = self.xfrdata[14];
570 iPROD = self.xfrdata[15];
571 iSERIAL = self.xfrdata[16];
573 self.manufacturer=self.getDescriptorString(iMFG);
574 self.product=self.getDescriptorString(iPROD);
575 self.serial=self.getDescriptorString(iSERIAL);
579 def printstrings(self):
580 print "Vendor ID is %04x." % self.VID;
581 print "Product ID is %04x." % self.PID;
582 print "Manufacturer: %s" % self.manufacturer;
583 print "Product: %s" % self.product;
584 print "Serial: %s" % self.serial;
586 def getDescriptorString(self, index):
587 """Grabs a string from the descriptor string table."""
588 # Get_Descriptor-String template. Code fills in idx at str[2].
589 Get_Descriptor_String = [0x80,0x06,index,0x03,0x00,0x00,0x40,0x00];
591 if index==0: return "MISSING STRING";
593 status=self.ctl_read(Get_Descriptor_String);
594 if status: return None;
596 #Since we've got a string
598 for c in self.xfrdata[2:len(self.xfrdata)]:
599 if c>0: toret=toret+chr(c);
602 class GoodFETMAXUSBHID(GoodFETMAXUSB):
603 """This is an example HID keyboard driver, loosely based on the
606 """Initialize a USB HID device."""
607 self.usb_disconnect();
613 """Main loop of the USB HID emulator."""
614 print "Starting a HID device. This won't return.";
618 """Handle USB Enumeration"""
620 #Grab the SETUP packet from the buffer.
621 SUD=self.readbytes(rSUDFIFO,8);
623 #Parse the SETUP packet
624 print "Handling a setup packet of %s" % self.setup2str(SUD);
626 setuptype=(ord(SUD[bmRequestType])&0x60);
628 self.std_request(SUD);
629 elif setuptype==0x20:
630 self.class_request(SUD);
631 elif setuptype==0x40:
632 self.vendor_request(SUD);
634 print "Unknown request type 0x%02x." % ord(SUD[bmRequestType])
636 def class_request(self,SUD):
637 """Handle a class request."""
638 print "Stalling a class request.";
640 def vendor_request(self,SUD):
641 print "Stalling a vendor request.";
643 def std_request(self,SUD):
644 """Handles a standard setup request."""
645 setuptype=ord(SUD[bRequest]);
646 if setuptype==SR_GET_DESCRIPTOR: self.send_descriptor(SUD);
647 #elif setuptype==SR_SET_FEATURE:
648 # self.rregAS(rFNADDR);
650 elif setuptype==SR_SET_CONFIGURATION: self.set_configuration(SUD);
651 elif setuptype==SR_GET_STATUS: self.get_status(SUD);
652 elif setuptype==SR_SET_ADDRESS: self.rregAS(rFNADDR);
653 elif setuptype==SR_GET_INTERFACE: self.get_interface(SUD);
655 print "Stalling Unknown standard setup request type %02x" % setuptype;
658 def get_interface(self,SUD):
659 """Handles a setup request for SR_GET_INTERFACE."""
660 if ord(SUD[wIndexL]==0):
661 self.wreg(rEP0FIFO,0);
662 self.wregAS(rEP0BC,1);
667 DD=[0x12, # bLength = 18d
668 0x01, # bDescriptorType = Device (1)
669 0x00,0x01, # bcdUSB(L/H) USB spec rev (BCD)
670 0x00,0x00,0x00, # bDeviceClass, bDeviceSubClass, bDeviceProtocol
671 0x40, # bMaxPacketSize0 EP0 is 64 bytes
672 0x6A,0x0B, # idVendor(L/H)--Maxim is 0B6A
673 0x46,0x53, # idProduct(L/H)--5346
674 0x34,0x12, # bcdDevice--1234
675 1,2,3, # iManufacturer, iProduct, iSerialNumber
677 #Configuration Descriptor
679 0x02, # bDescriptorType = Config
680 0x22,0x00, # wTotalLength(L/H) = 34 bytes
681 0x01, # bNumInterfaces
683 0x00, # iConfiguration
684 0xE0, # bmAttributes. b7=1 b6=self-powered b5=RWU supported
685 0x01, # MaxPower is 2 ma
686 # INTERFACE Descriptor
690 0x00, # bAlternate Setting
691 0x01, # bNum Endpoints
692 0x03, # bInterfaceClass = HID
693 0x00,0x00, # bInterfaceSubClass, bInterfaceProtocol
695 # HID Descriptor--It's at CD[18]
697 0x21, # bDescriptorType = HID
698 0x10,0x01, # bcdHID(L/H) Rev 1.1
699 0x00, # bCountryCode (none)
700 0x01, # bNumDescriptors (one report descriptor)
701 0x22, # bDescriptorType (report)
702 43,0, # CD[25]: wDescriptorLength(L/H) (report descriptor size is 43 bytes)
703 # Endpoint Descriptor
705 0x05, # bDescriptorType (Endpoint)
706 0x83, # bEndpointAddress (EP3-IN)
707 0x03, # bmAttributes (interrupt)
708 64,0, # wMaxPacketSize (64)
711 # STRING descriptor 0--Language string
715 # 0x03, # bDescriptorType = string
716 # 0x09,0x04 # wLANGID(L/H) = English-United Sates
718 # STRING descriptor 1--Manufacturer ID
719 "\x0c\x03M\x00a\x00x\x00i\x00m\x00",
722 # 0x03, # bDescriptorType = string
723 # 'M',0,'a',0,'x',0,'i',0,'m',0 # text in Unicode
725 # STRING descriptor 2 - Product ID
726 "\x18\x03M\x00A\x00X\x003\x004\x002\x000\x00E\x00 \x00E\x00n\x00u\x00m\x00 \x00C\x00o\x00d\x00e\x00",
728 # 0x03, # bDescriptorType = string
729 # 'M',0,'A',0,'X',0,'3',0,'4',0,'2',0,'0',0,'E',0,' ',0,
730 # 'E',0,'n',0,'u',0,'m',0,' ',0,'C',0,'o',0,'d',0,'e',0
734 # STRING descriptor 3 - Serial Number ID
735 "\x14\x03S\x00/\x00N\x00 \x003\x004\x002\x000\x00E\x00"
737 # 0x03, # bDescriptorType = string
750 0x05,0x01, # Usage Page (generic desktop)
751 0x09,0x06, # Usage (keyboard)
752 0xA1,0x01, # Collection
753 0x05,0x07, # Usage Page 7 (keyboard/keypad)
754 0x19,0xE0, # Usage Minimum = 224
755 0x29,0xE7, # Usage Maximum = 231
756 0x15,0x00, # Logical Minimum = 0
757 0x25,0x01, # Logical Maximum = 1
758 0x75,0x01, # Report Size = 1
759 0x95,0x08, # Report Count = 8
760 0x81,0x02, # Input(Data,Variable,Absolute)
761 0x95,0x01, # Report Count = 1
762 0x75,0x08, # Report Size = 8
763 0x81,0x01, # Input(Constant)
764 0x19,0x00, # Usage Minimum = 0
765 0x29,0x65, # Usage Maximum = 101
766 0x15,0x00, # Logical Minimum = 0,
767 0x25,0x65, # Logical Maximum = 101
768 0x75,0x08, # Report Size = 8
769 0x95,0x01, # Report Count = 1
770 0x81,0x00, # Input(Data,Variable,Array)
772 def send_descriptor(self,SUD):
773 """Send the USB descriptors based upon the setup data."""
775 reqlen=ord(SUD[wLengthL])+256*ord(SUD[wLengthH]); #16-bit length
776 desctype=ord(SUD[wValueH]);
778 if desctype==GD_DEVICE:
781 elif desctype==GD_CONFIGURATION:
784 elif desctype==GD_STRING:
785 desclen=self.strDesc[ord(SUD[wValueL])][0];
786 ddata=self.strDesc[ord(SUD[wValueL])];
787 elif desctype==GD_REPORT:
791 #TODO Configuration, String, Hid, and Report
794 sendlen=min(reqlen,desclen);
795 self.writebytes(rEP0FIFO,ddata);
796 self.wregAS(rEP0BC,sendlen);
798 print "Stalling in send_descriptor() for lack of handler for %02x." % desctype;
800 def set_configuration(self,SUD):
801 """Set the configuration."""
803 configval=ord(SUD[wValueL]);
805 self.SETBIT(rUSBIEN,bmSUSPIE);
806 self.rregAS(rFNADDR);
807 def get_status(self,SUD):
808 """Get the USB Setup Status."""
809 testbyte=ord(SUD[bmRequestType])
813 self.wreg(rEP0FIFO,0x03); #Enable RWU and self-powered
814 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
815 self.wregAS(rEP0BC,2); #Load byte count, arm transfer, and ack CTL.
818 self.wreg(rEP0FIFO,0x00);
819 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
820 self.wregAS(rEP0BC,2);
823 if(ord(SUD[wIndexL])==0x83):
824 self.wreg(rEP0FIFO,0x01); #Stall EP3
825 self.wreg(rEP0FIFO,0x00); #Second byte is always zero.
826 self.wregAS(rEP0BC,2);
835 typestring=" Python does USB HID!";
838 def asc2hid(self,ascii):
839 """Translate ASCII to an USB keycode."""
841 if a>='a' and a<='z':
842 return ord(a)-ord('a')+4;
843 elif a>='A' and a<='Z':
844 return ord(a)-ord('A')+4;
850 """Type next letter in buffer."""
851 if self.typepos>=len(self.typestring):
853 elif self.typephase==0:
858 self.typeletter(self.typestring[self.typepos]);
859 self.typepos=self.typepos+1;
861 def typeletter(self,key):
862 """Type a letter on IN3. Zero for keyup."""
863 #if type(key)==str: key=ord(key);
865 self.wreg(rEP3INFIFO,0);
866 self.wreg(rEP3INFIFO,0);
867 self.wreg(rEP3INFIFO,self.asc2hid(key));
868 self.wreg(rEP3INBC,3);
870 """Handle IN3 event."""
871 #Don't bother clearing interrupt flag, that's done by sending the reply.