diff options
Diffstat (limited to 'protocol/usb_hid/USB_Host_Shield_2.0/confdescparser.h')
| m--------- | protocol/usb_hid/USB_Host_Shield_2.0 | 0 | ||||
| -rw-r--r-- | protocol/usb_hid/USB_Host_Shield_2.0/confdescparser.h | 213 |
2 files changed, 213 insertions, 0 deletions
diff --git a/protocol/usb_hid/USB_Host_Shield_2.0 b/protocol/usb_hid/USB_Host_Shield_2.0 deleted file mode 160000 -Subproject 7c2e6c1bcdcc22cfdbd82edd9d8fc4c4276ead4 diff --git a/protocol/usb_hid/USB_Host_Shield_2.0/confdescparser.h b/protocol/usb_hid/USB_Host_Shield_2.0/confdescparser.h new file mode 100644 index 0000000000..a6806f2ea7 --- /dev/null +++ b/protocol/usb_hid/USB_Host_Shield_2.0/confdescparser.h @@ -0,0 +1,213 @@ +/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved. + +This software may be distributed and modified under the terms of the GNU +General Public License version 2 (GPL2) as published by the Free Software +Foundation and appearing in the file GPL2.TXT included in the packaging of +this file. Please note that GPL2 Section 2[b] requires that all works based +on this software must also be made publicly available under the terms of +the GPL2 ("Copyleft"). + +Contact information +------------------- + +Circuits At Home, LTD +Web : http://www.circuitsathome.com +e-mail : support@circuitsathome.com + */ +#if !defined(_usb_h_) || defined(__CONFDESCPARSER_H__) +#error "Never include confdescparser.h directly; include Usb.h instead" +#else + +#define __CONFDESCPARSER_H__ + +class UsbConfigXtracter { +public: + //virtual void ConfigXtract(const USB_CONFIGURATION_DESCRIPTOR *conf) = 0; + //virtual void InterfaceXtract(uint8_t conf, const USB_INTERFACE_DESCRIPTOR *iface) = 0; + + virtual void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep) { + }; +}; + +#define CP_MASK_COMPARE_CLASS 1 +#define CP_MASK_COMPARE_SUBCLASS 2 +#define CP_MASK_COMPARE_PROTOCOL 4 +#define CP_MASK_COMPARE_ALL 7 + +// Configuration Descriptor Parser Class Template + +template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK> +class ConfigDescParser : public USBReadParser { + UsbConfigXtracter *theXtractor; + MultiValueBuffer theBuffer; + MultiByteValueParser valParser; + ByteSkipper theSkipper; + uint8_t varBuffer[16 /*sizeof(USB_CONFIGURATION_DESCRIPTOR)*/]; + + uint8_t stateParseDescr; // ParseDescriptor state + + uint8_t dscrLen; // Descriptor length + uint8_t dscrType; // Descriptor type + + bool isGoodInterface; // Apropriate interface flag + uint8_t confValue; // Configuration value + uint8_t protoValue; // Protocol value + uint8_t ifaceNumber; // Interface number + uint8_t ifaceAltSet; // Interface alternate settings + + bool UseOr; + bool ParseDescriptor(uint8_t **pp, uint16_t *pcntdn); + void PrintHidDescriptor(const USB_HID_DESCRIPTOR *pDesc); + +public: + + void SetOR(void) { + UseOr = true; + } + ConfigDescParser(UsbConfigXtracter *xtractor); + void Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset); +}; + +template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK> +ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::ConfigDescParser(UsbConfigXtracter *xtractor) : +theXtractor(xtractor), +stateParseDescr(0), +dscrLen(0), +dscrType(0), +UseOr(false) { + theBuffer.pValue = varBuffer; + valParser.Initialize(&theBuffer); + theSkipper.Initialize(&theBuffer); +}; + +template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK> +void ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset) { + uint16_t cntdn = (uint16_t)len; + uint8_t *p = (uint8_t*)pbuf; + + while(cntdn) + if(!ParseDescriptor(&p, &cntdn)) + return; +} + +/* Parser for the configuration descriptor. Takes values for class, subclass, protocol fields in interface descriptor and + compare masks for them. When the match is found, calls EndpointXtract passing buffer containing endpoint descriptor */ +template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK> +bool ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::ParseDescriptor(uint8_t **pp, uint16_t *pcntdn) { + USB_CONFIGURATION_DESCRIPTOR* ucd = reinterpret_cast<USB_CONFIGURATION_DESCRIPTOR*>(varBuffer); + USB_INTERFACE_DESCRIPTOR* uid = reinterpret_cast<USB_INTERFACE_DESCRIPTOR*>(varBuffer); + switch(stateParseDescr) { + case 0: + theBuffer.valueSize = 2; + valParser.Initialize(&theBuffer); + stateParseDescr = 1; + case 1: + if(!valParser.Parse(pp, pcntdn)) + return false; + dscrLen = *((uint8_t*)theBuffer.pValue); + dscrType = *((uint8_t*)theBuffer.pValue + 1); + stateParseDescr = 2; + case 2: + // This is a sort of hack. Assuming that two bytes are all ready in the buffer + // the pointer is positioned two bytes ahead in order for the rest of descriptor + // to be read right after the size and the type fields. + // This should be used carefully. varBuffer should be used directly to handle data + // in the buffer. + theBuffer.pValue = varBuffer + 2; + stateParseDescr = 3; + case 3: + switch(dscrType) { + case USB_DESCRIPTOR_INTERFACE: + isGoodInterface = false; + case USB_DESCRIPTOR_CONFIGURATION: + theBuffer.valueSize = sizeof (USB_CONFIGURATION_DESCRIPTOR) - 2; + break; + case USB_DESCRIPTOR_ENDPOINT: + theBuffer.valueSize = sizeof (USB_ENDPOINT_DESCRIPTOR) - 2; + break; + case HID_DESCRIPTOR_HID: + theBuffer.valueSize = dscrLen - 2; + break; + } + valParser.Initialize(&theBuffer); + stateParseDescr = 4; + case 4: + switch(dscrType) { + case USB_DESCRIPTOR_CONFIGURATION: + if(!valParser.Parse(pp, pcntdn)) + return false; + confValue = ucd->bConfigurationValue; + break; + case USB_DESCRIPTOR_INTERFACE: + if(!valParser.Parse(pp, pcntdn)) + return false; + if((MASK & CP_MASK_COMPARE_CLASS) && uid->bInterfaceClass != CLASS_ID) + break; + if((MASK & CP_MASK_COMPARE_SUBCLASS) && uid->bInterfaceSubClass != SUBCLASS_ID) + break; + if(UseOr) { + if((!((MASK & CP_MASK_COMPARE_PROTOCOL) && uid->bInterfaceProtocol))) + break; + } else { + if((MASK & CP_MASK_COMPARE_PROTOCOL) && uid->bInterfaceProtocol != PROTOCOL_ID) + break; + } + isGoodInterface = true; + ifaceNumber = uid->bInterfaceNumber; + ifaceAltSet = uid->bAlternateSetting; + protoValue = uid->bInterfaceProtocol; + break; + case USB_DESCRIPTOR_ENDPOINT: + if(!valParser.Parse(pp, pcntdn)) + return false; + if(isGoodInterface) + if(theXtractor) + theXtractor->EndpointXtract(confValue, ifaceNumber, ifaceAltSet, protoValue, (USB_ENDPOINT_DESCRIPTOR*)varBuffer); + break; + //case HID_DESCRIPTOR_HID: + // if (!valParser.Parse(pp, pcntdn)) + // return false; + // PrintHidDescriptor((const USB_HID_DESCRIPTOR*)varBuffer); + // break; + default: + if(!theSkipper.Skip(pp, pcntdn, dscrLen - 2)) + return false; + } + theBuffer.pValue = varBuffer; + stateParseDescr = 0; + } + return true; +} + +template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK> +void ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::PrintHidDescriptor(const USB_HID_DESCRIPTOR *pDesc) { + Notify(PSTR("\r\n\r\nHID Descriptor:\r\n"), 0x80); + Notify(PSTR("bDescLength:\t\t"), 0x80); + PrintHex<uint8_t > (pDesc->bLength, 0x80); + + Notify(PSTR("\r\nbDescriptorType:\t"), 0x80); + PrintHex<uint8_t > (pDesc->bDescriptorType, 0x80); + + Notify(PSTR("\r\nbcdHID:\t\t\t"), 0x80); + PrintHex<uint16_t > (pDesc->bcdHID, 0x80); + + Notify(PSTR("\r\nbCountryCode:\t\t"), 0x80); + PrintHex<uint8_t > (pDesc->bCountryCode, 0x80); + + Notify(PSTR("\r\nbNumDescriptors:\t"), 0x80); + PrintHex<uint8_t > (pDesc->bNumDescriptors, 0x80); + + for(uint8_t i = 0; i < pDesc->bNumDescriptors; i++) { + HID_CLASS_DESCRIPTOR_LEN_AND_TYPE *pLT = (HID_CLASS_DESCRIPTOR_LEN_AND_TYPE*)&(pDesc->bDescrType); + + Notify(PSTR("\r\nbDescrType:\t\t"), 0x80); + PrintHex<uint8_t > (pLT[i].bDescrType, 0x80); + + Notify(PSTR("\r\nwDescriptorLength:\t"), 0x80); + PrintHex<uint16_t > (pLT[i].wDescriptorLength, 0x80); + } + Notify(PSTR("\r\n"), 0x80); +} + + +#endif // __CONFDESCPARSER_H__ |