mirror of
https://github.com/gdsports/USBHost_t36
synced 2024-11-04 16:25:10 -05:00
Generic HID parser, initial commit
This commit is contained in:
PaulStoffregen
parent
6938b46086
commit
d9ad2cc78f
@ -396,6 +396,22 @@ private:
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friend class USBHost;
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};
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// Device drivers may inherit from this base class, if they wish to receive
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// HID input data fully decoded by the USBHIDParser driver
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class USBHIDInput {
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public:
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USBHIDInput();
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private:
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virtual bool claim_collection(Device_t *dev, uint32_t topusage);
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virtual void hid_input_begin(uint32_t topusage, uint32_t type, int min, int max);
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virtual void hid_input_data(uint32_t usage, int32_t value);
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virtual void hid_input_end();
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virtual void disconnect_collection(Device_t *dev);
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USBHIDInput *next;
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static USBHIDInput *list;
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friend class USBHIDParser;
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};
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/************************************************/
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/* USB Device Drivers */
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/************************************************/
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@ -423,7 +439,7 @@ public:
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PORT_ACTIVE = 9
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};
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protected:
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virtual bool claim(Device_t *device, int type, const uint8_t *descriptors, uint32_t len);
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virtual bool claim(Device_t *dev, int type, const uint8_t *descriptors, uint32_t len);
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virtual void control(const Transfer_t *transfer);
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virtual void timer_event(USBDriverTimer *whichTimer);
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virtual void disconnect();
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@ -475,7 +491,45 @@ private:
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static volatile bool reset_busy;
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};
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class KeyboardController : public USBDriver {
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class USBHIDParser : public USBDriver {
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public:
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USBHIDParser(USBHost &host) { init(); }
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void driver_ready_for_hid_collection(USBHIDInput *driver);
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protected:
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enum { TOPUSAGE_LIST_LEN = 4 };
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enum { USAGE_LIST_LEN = 12 };
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virtual bool claim(Device_t *device, int type, const uint8_t *descriptors, uint32_t len);
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virtual void control(const Transfer_t *transfer);
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virtual void disconnect();
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static void in_callback(const Transfer_t *transfer);
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static void out_callback(const Transfer_t *transfer);
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void in_data(const Transfer_t *transfer);
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void out_data(const Transfer_t *transfer);
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bool check_if_using_report_id();
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void parse();
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USBHIDInput * find_driver(uint32_t topusage);
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void parse(uint16_t type_and_report_id, const uint8_t *data, uint32_t len);
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void init();
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private:
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Pipe_t *in_pipe;
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Pipe_t *out_pipe;
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//uint32_t topusage_list[TOPUSAGE_LIST_LEN];
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USBHIDInput *topusage_drivers[TOPUSAGE_LIST_LEN];
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uint16_t in_size;
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uint16_t out_size;
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setup_t setup;
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uint8_t descriptor[256];
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uint8_t report[64];
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uint16_t descsize;
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bool use_report_id;
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Pipe_t mypipes[3] __attribute__ ((aligned(32)));
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Transfer_t mytransfers[4] __attribute__ ((aligned(32)));
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};
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class KeyboardController : public USBDriver /* , public USBHIDInput */ {
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public:
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KeyboardController(USBHost &host) { init(); }
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KeyboardController(USBHost *host) { init(); }
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515
hid.cpp
Normal file
515
hid.cpp
Normal file
@ -0,0 +1,515 @@
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/* USB EHCI Host for Teensy 3.6
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* Copyright 2017 Paul Stoffregen (paul@pjrc.com)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <Arduino.h>
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#include "USBHost_t36.h" // Read this header first for key info
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void USBHIDParser::init()
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{
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contribute_Pipes(mypipes, sizeof(mypipes)/sizeof(Pipe_t));
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contribute_Transfers(mytransfers, sizeof(mytransfers)/sizeof(Transfer_t));
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driver_ready_for_device(this);
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}
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bool USBHIDParser::claim(Device_t *dev, int type, const uint8_t *descriptors, uint32_t len)
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{
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println("HIDParser claim this=", (uint32_t)this, HEX);
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// only claim at interface level
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if (type != 1) return false;
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if (len < 9+9+7) return false;
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// interface descriptor
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uint32_t numendpoint = descriptors[4];
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if (numendpoint < 1 || numendpoint > 2) return false;
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if (descriptors[5] != 3) return false; // bInterfaceClass, 3 = HID
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println(" bInterfaceClass = ", descriptors[5]);
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println(" bInterfaceSubClass = ", descriptors[6]);
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println(" bInterfaceProtocol = ", descriptors[7]);
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// hid interface descriptor
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uint32_t hidlen = descriptors[9];
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if (hidlen < 9) return false;
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if (descriptors[10] != 33) return false; // descriptor type, 33=HID
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if (descriptors[14] < 1) return false; // must be at least 1 extra descriptor
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if (hidlen != (uint32_t)(6 + descriptors[14] * 3)) return false; // must be correct size
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if (9 + hidlen > len) return false;
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uint32_t i=0;
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while (1) {
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if (descriptors[15 + i * 3] == 34) { // found HID report descriptor
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descsize = descriptors[16 + i * 3] | (descriptors[17 + i * 3] << 8);
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println("report descriptor size = ", descsize);
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break;
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}
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i++;
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if (i >= descriptors[14]) return false;
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}
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if (descsize > sizeof(descriptor)) return false; // can't fit the report descriptor
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// endpoint descriptor(s)
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uint32_t offset = 9 + hidlen;
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if (len < offset + numendpoint * 7) return false; // not enough data
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if (numendpoint == 1) {
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println("Single endpoint HID:");
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if (descriptors[offset] != 7) return false;
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if (descriptors[offset+1] != 5) return false; // endpoint descriptor
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if (descriptors[offset+3] != 3) return false; // must be interrupt type
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uint32_t endpoint = descriptors[offset+2];
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uint32_t size = descriptors[offset+4] | (descriptors[offset+5] << 8);
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uint32_t interval = descriptors[offset+6];
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println(" endpoint = ", endpoint, HEX);
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println(" size = ", size);
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println(" interval = ", interval);
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if ((endpoint & 0x0F) == 0) return false;
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if ((endpoint & 0xF0) != 0x80) return false; // must be IN direction
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in_pipe = new_Pipe(dev, 3, endpoint & 0x0F, 1, size, interval);
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out_pipe = NULL;
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in_size = size;
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} else {
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println("Two endpoint HID:");
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if (descriptors[offset] != 7) return false;
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if (descriptors[offset+1] != 5) return false; // endpoint descriptor
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if (descriptors[offset+3] != 3) return false; // must be interrupt type
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uint32_t endpoint1 = descriptors[offset+2];
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uint32_t size1 = descriptors[offset+4] | (descriptors[offset+5] << 8);
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uint32_t interval1 = descriptors[offset+6];
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println(" endpoint = ", endpoint1, HEX);
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println(" size = ", size1);
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println(" interval = ", interval1);
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if ((endpoint1 & 0x0F) == 0) return false;
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if (descriptors[offset+7] != 7) return false;
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if (descriptors[offset+8] != 5) return false; // endpoint descriptor
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if (descriptors[offset+10] != 3) return false; // must be interrupt type
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uint32_t endpoint2 = descriptors[offset+9];
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uint32_t size2 = descriptors[offset+11] | (descriptors[offset+12] << 8);
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uint32_t interval2 = descriptors[offset+13];
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println(" endpoint = ", endpoint2, HEX);
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println(" size = ", size2);
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println(" interval = ", interval2);
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if ((endpoint2 & 0x0F) == 0) return false;
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if (((endpoint1 & 0xF0) == 0x80) && ((endpoint2 & 0xF0) == 0)) {
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// first endpoint is IN, second endpoint is OUT
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in_pipe = new_Pipe(dev, 3, endpoint1 & 0x0F, 1, size1, interval1);
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//out_pipe = new_Pipe(dev, 3, endpoint2, 0, size2, interval2);
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out_pipe = NULL; // TODO; fixme
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in_size = size1;
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out_size = size2;
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} else if (((endpoint1 & 0xF0) == 0) && ((endpoint2 & 0xF0) == 0x80)) {
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// first endpoint is OUT, second endpoint is IN
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in_pipe = new_Pipe(dev, 3, endpoint2 & 0x0F, 1, size2, interval2);
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//out_pipe = new_Pipe(dev, 3, endpoint1, 0, size1, interval1);
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out_pipe = NULL; // TODO; fixme
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in_size = size2;
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out_size = size1;
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} else {
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return false;
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}
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out_pipe->callback_function = out_callback;
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}
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in_pipe->callback_function = in_callback;
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for (uint32_t i=0; i < TOPUSAGE_LIST_LEN; i++) {
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//topusage_list[i] = 0;
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topusage_drivers[i] = NULL;
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}
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// request the HID report descriptor
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mk_setup(setup, 0x81, 6, 0x2200, descriptors[2], descsize); // get report desc
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queue_Control_Transfer(dev, &setup, descriptor, this);
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return true;
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}
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void USBHIDParser::control(const Transfer_t *transfer)
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{
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println("control callback (hid)");
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print_hexbytes(transfer->buffer, transfer->length);
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uint32_t mesg = transfer->setup.word1;
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//println(" mesg = ", mesg, HEX);
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if (mesg == 0x22000681 && transfer->length == descsize) { // HID report descriptor
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println(" got report descriptor");
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queue_Data_Transfer(in_pipe, report, in_size, this);
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}
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}
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void USBHIDParser::in_callback(const Transfer_t *transfer)
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{
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if (transfer->driver) {
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((USBHIDParser*)(transfer->driver))->in_data(transfer);
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}
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}
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void USBHIDParser::out_callback(const Transfer_t *transfer)
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{
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if (transfer->driver) {
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((USBHIDParser*)(transfer->driver))->out_data(transfer);
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}
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}
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void USBHIDParser::disconnect()
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{
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for (uint32_t i=0; i < TOPUSAGE_LIST_LEN; i++) {
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USBHIDInput *driver = topusage_drivers[i];
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if (driver) {
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driver->disconnect_collection(device);
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topusage_drivers[i] = NULL;
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}
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}
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}
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void USBHIDParser::in_data(const Transfer_t *transfer)
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{
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print("HID: ");
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print_hexbytes(transfer->buffer, transfer->length);
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parse(0x0100, (const uint8_t *)transfer->buffer, transfer->length);
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queue_Data_Transfer(in_pipe, report, in_size, this);
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}
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void USBHIDParser::out_data(const Transfer_t *transfer)
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{
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}
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void USBHIDParser::parse()
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{
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const uint8_t *p = descriptor;
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const uint8_t *end = p + descsize;
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uint16_t usage_page = 0;
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uint16_t usage = 0;
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uint8_t collection_level = 0;
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uint8_t topusage_count = 0;
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use_report_id = false;
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while (p < end) {
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uint8_t tag = *p;
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if (tag == 0xFE) { // Long Item
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p += *p + 3;
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continue;
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}
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uint32_t val;
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switch (tag & 0x03) { // Short Item data
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case 0: val = 0;
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p++;
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break;
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case 1: val = p[1];
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p += 2;
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break;
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case 2: val = p[1] | (p[2] << 8);
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p += 3;
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break;
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case 3: val = p[1] | (p[2] << 8) | (p[3] << 16) | (p[4] << 24);
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p += 5;
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break;
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}
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if (p > end) break;
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switch (tag & 0xFC) {
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case 0x84: // Report ID (global)
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use_report_id = true;
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break;
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case 0x04: // Usage Page (global)
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usage_page = val;
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break;
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case 0x08: // Usage (local)
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usage = val;
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break;
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case 0xA0: // Collection
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if (collection_level == 0 && topusage_count < TOPUSAGE_LIST_LEN) {
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uint32_t topusage = ((uint32_t)usage_page << 16) | usage;
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//topusage_list[topusage_count] = topusage;
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topusage_drivers[topusage_count] = find_driver(topusage);
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topusage_count++;
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}
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collection_level++;
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usage = 0;
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break;
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case 0xC0: // End Collection
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if (collection_level > 0) {
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collection_level--;
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}
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case 0x80: // Input
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case 0x90: // Output
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case 0xB0: // Feature
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usage = 0;
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break;
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}
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}
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while (topusage_count < TOPUSAGE_LIST_LEN) {
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//topusage_list[topusage_count] = 0;
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topusage_drivers[topusage_count] = NULL;
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topusage_count++;
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}
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}
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USBHIDInput * USBHIDInput::list = NULL;
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USBHIDInput::USBHIDInput()
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{
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next = NULL;
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if (list == NULL) {
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list = this;
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} else {
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USBHIDInput *last = list;
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while (last->next) last = last->next;
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last->next = this;
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}
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}
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USBHIDInput * USBHIDParser::find_driver(uint32_t topusage)
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{
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USBHIDInput *driver = USBHIDInput::list;
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while (driver) {
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if (driver->claim_collection(device, topusage)) {
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return driver;
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}
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driver = driver->next;
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}
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return NULL;
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}
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static uint32_t bitfield(const uint8_t *data, uint32_t bitindex, uint32_t numbits)
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{
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uint32_t output = 0;
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uint32_t bitcount = 0;
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data += (bitindex >> 3);
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uint32_t offset = bitindex & 7;
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if (offset) {
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output = (*data++) >> offset;
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bitcount = 8 - offset;
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}
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while (bitcount < numbits) {
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output |= (uint32_t)(*data++) << bitcount;
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bitcount += 8;
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}
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if (bitcount > numbits && numbits < 32) {
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output &= ((1 << numbits) - 1);
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}
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return output;
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}
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static int32_t signext(uint32_t num, uint32_t bitcount)
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{
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if (bitcount < 32 && bitcount > 0 && (num & (1 << (bitcount-1)))) {
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num |= ~((1 << bitcount) - 1);
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}
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return (int32_t)num;
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}
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static int32_t signedval(uint32_t num, uint8_t tag)
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{
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tag &= 3;
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if (tag == 1) return (int8_t)num;
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if (tag == 2) return (int16_t)num;
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return (int32_t)num;
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}
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void USBHIDParser::parse(uint16_t type_and_report_id, const uint8_t *data, uint32_t len)
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{
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const uint8_t *p = descriptor;
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const uint8_t *end = p + descsize;
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USBHIDInput *driver = NULL;
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uint32_t topusage = 0;
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uint8_t topusage_index = 0;
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uint8_t collection_level = 0;
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uint8_t usage[USAGE_LIST_LEN] = {0, 0};
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uint8_t usage_count = 0;
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uint16_t report_size = 0;
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uint16_t report_count = 0;
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uint16_t usage_page = 0;
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int32_t logical_min = 0;
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int32_t logical_max = 0;
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uint32_t bitindex = 0;
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while (p < end) {
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uint8_t tag = *p;
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if (tag == 0xFE) { // Long Item (unsupported)
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p += p[1] + 3;
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continue;
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}
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uint32_t val;
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switch (tag & 0x03) { // Short Item data
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case 0: val = 0;
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p++;
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break;
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case 1: val = p[1];
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p += 2;
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break;
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case 2: val = p[1] | (p[2] << 8);
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p += 3;
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break;
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case 3: val = p[1] | (p[2] << 8) | (p[3] << 16) | (p[4] << 24);
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p += 5;
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break;
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}
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if (p > end) break;
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bool reset_local = false;
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switch (tag & 0xFC) {
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case 0x04: // Usage Page (global)
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usage_page = val;
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break;
|
||||
case 0x14: // Logical Minimum (global)
|
||||
logical_min = signedval(val, tag);
|
||||
break;
|
||||
case 0x24: // Logical Maximum (global)
|
||||
logical_max = signedval(val, tag);
|
||||
break;
|
||||
case 0x74: // Report Size (global)
|
||||
report_size = val;
|
||||
break;
|
||||
case 0x94: // Report Count (global)
|
||||
report_count = val;
|
||||
break;
|
||||
case 0x84: // Report ID (global)
|
||||
// TODO
|
||||
break;
|
||||
case 0x08: // Usage (local)
|
||||
if (usage_count < USAGE_LIST_LEN) {
|
||||
usage[usage_count++] = val;
|
||||
}
|
||||
break;
|
||||
case 0x18: // Usage Minimum (local)
|
||||
usage[0] = val;
|
||||
usage_count = 255;
|
||||
break;
|
||||
case 0x28: // Usage Maximum (local)
|
||||
usage[1] = val;
|
||||
usage_count = 255;
|
||||
break;
|
||||
case 0xA0: // Collection
|
||||
if (collection_level == 0) {
|
||||
topusage = ((uint32_t)usage_page << 16) | usage[0];
|
||||
driver = NULL;
|
||||
if (topusage_index < TOPUSAGE_LIST_LEN) {
|
||||
driver = topusage_drivers[topusage_index++];
|
||||
}
|
||||
}
|
||||
collection_level++;
|
||||
reset_local = true;
|
||||
break;
|
||||
case 0xC0: // End Collection
|
||||
if (collection_level > 0) {
|
||||
collection_level--;
|
||||
if (collection_level == 0 && driver != NULL) {
|
||||
driver->hid_input_end();
|
||||
driver = NULL;
|
||||
}
|
||||
}
|
||||
reset_local = true;
|
||||
break;
|
||||
case 0x80: // Input
|
||||
if ((val & 1) == 0) {
|
||||
println("begin, usage=", topusage, HEX);
|
||||
println(" type= ", val, HEX);
|
||||
println(" min= ", logical_min);
|
||||
println(" max= ", logical_max);
|
||||
if (driver) {
|
||||
driver->hid_input_begin(topusage, val,
|
||||
logical_min, logical_max);
|
||||
}
|
||||
println("Input, total bits=", report_count * report_size);
|
||||
if ((val & 2)) {
|
||||
// ordinary variable format
|
||||
uint32_t uindex = 0;
|
||||
bool uminmax = false;
|
||||
if (usage_count > USAGE_LIST_LEN || usage_count == 0) {
|
||||
// usage numbers by min/max, not from list
|
||||
uindex = usage[0];
|
||||
uminmax = true;
|
||||
}
|
||||
for (uint32_t i=0; i < report_count; i++) {
|
||||
uint32_t u;
|
||||
if (uminmax) {
|
||||
u = uindex;
|
||||
if (uindex < usage[1]) uindex++;
|
||||
} else {
|
||||
u = usage[uindex++];
|
||||
if (uindex >= USAGE_LIST_LEN-1) {
|
||||
uindex = USAGE_LIST_LEN-1;
|
||||
}
|
||||
}
|
||||
u |= (uint32_t)usage_page << 16;
|
||||
print(" usage = ", u, HEX);
|
||||
|
||||
uint32_t n = bitfield(data, bitindex, report_size);
|
||||
if (logical_min >= 0) {
|
||||
println(" data = ", n);
|
||||
if (driver) driver->hid_input_data(u, n);
|
||||
} else {
|
||||
int32_t sn = signext(n, report_size);
|
||||
println(" sdata = ", sn);
|
||||
if (driver) driver->hid_input_data(u, sn);
|
||||
}
|
||||
bitindex += report_size;
|
||||
}
|
||||
} else {
|
||||
// array format, each item is a usage number
|
||||
for (uint32_t i=0; i < report_count; i++) {
|
||||
uint32_t u = bitfield(data, bitindex, report_size);
|
||||
int n = u;
|
||||
if (n >= logical_min && n <= logical_max) {
|
||||
u |= (uint32_t)usage_page << 16;
|
||||
print(" usage = ", u, HEX);
|
||||
println(" data = 1");
|
||||
if (driver) driver->hid_input_data(u, 1);
|
||||
}
|
||||
bitindex += report_size;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// skip past constant fields
|
||||
bitindex += report_count * report_size;
|
||||
}
|
||||
reset_local = true;
|
||||
break;
|
||||
case 0x90: // Output
|
||||
// TODO.....
|
||||
reset_local = true;
|
||||
break;
|
||||
case 0xB0: // Feature
|
||||
// TODO.....
|
||||
reset_local = true;
|
||||
break;
|
||||
|
||||
case 0xA4: // Push (yikes! Hope nobody really uses this?!)
|
||||
case 0xB4: // Pop (yikes! Hope nobody really uses this?!)
|
||||
case 0x34: // Physical Minimum (global)
|
||||
case 0x44: // Physical Maximum (global)
|
||||
case 0x54: // Unit Exponent (global)
|
||||
case 0x64: // Unit (global)
|
||||
case 0x38: // Designator Index (local)
|
||||
case 0x48: // Designator Minimum (local)
|
||||
case 0x58: // Designator Maximum (local)
|
||||
case 0x78: // String Index (local)
|
||||
case 0x88: // String Minimum (local)
|
||||
case 0x98: // String Maximum (local)
|
||||
case 0xA8: // Delimiter (local)
|
||||
default:
|
||||
println("Ruh Roh, unsupported tag, not a good thing Scoob ", tag, HEX);
|
||||
}
|
||||
if (reset_local) {
|
||||
usage_count = 0;
|
||||
usage[0] = 0;
|
||||
usage[1] = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user