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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if (CFG_TUH_ENABLED && CFG_TUH_HID)
#include "host/usbh.h"
#include "host/usbh_pvt.h"
#include "hid_host.h"
// Level where CFG_TUSB_DEBUG must be at least for this driver is logged
#ifndef CFG_TUH_HID_LOG_LEVEL
#define CFG_TUH_HID_LOG_LEVEL CFG_TUH_LOG_LEVEL
#endif
#define TU_LOG_DRV(...) TU_LOG(CFG_TUH_HID_LOG_LEVEL, __VA_ARGS__)
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
typedef struct {
uint8_t daddr;
uint8_t itf_num;
uint8_t ep_in;
uint8_t ep_out;
bool mounted; // Enumeration is complete
uint8_t itf_protocol; // None, Keyboard, Mouse
uint8_t protocol_mode; // Boot (0) or Report protocol (1)
uint8_t report_desc_type;
uint16_t report_desc_len;
uint16_t epin_size;
uint16_t epout_size;
CFG_TUH_MEM_ALIGN uint8_t epin_buf[CFG_TUH_HID_EPIN_BUFSIZE];
CFG_TUH_MEM_ALIGN uint8_t epout_buf[CFG_TUH_HID_EPOUT_BUFSIZE];
} hidh_interface_t;
CFG_TUH_MEM_SECTION
tu_static hidh_interface_t _hidh_itf[CFG_TUH_HID];
tu_static uint8_t _hidh_default_protocol = HID_PROTOCOL_BOOT;
//--------------------------------------------------------------------+
// Helper
//--------------------------------------------------------------------+
TU_ATTR_ALWAYS_INLINE static inline hidh_interface_t* get_hid_itf(uint8_t daddr, uint8_t idx) {
TU_ASSERT(daddr > 0 && idx < CFG_TUH_HID, NULL);
hidh_interface_t* p_hid = &_hidh_itf[idx];
return (p_hid->daddr == daddr) ? p_hid : NULL;
}
// Get instance ID by endpoint address
static uint8_t get_idx_by_epaddr(uint8_t daddr, uint8_t ep_addr) {
for (uint8_t idx = 0; idx < CFG_TUH_HID; idx++) {
hidh_interface_t const* p_hid = &_hidh_itf[idx];
if (p_hid->daddr == daddr &&
(p_hid->ep_in == ep_addr || p_hid->ep_out == ep_addr)) {
return idx;
}
}
return TUSB_INDEX_INVALID_8;
}
static hidh_interface_t* find_new_itf(void) {
for (uint8_t i = 0; i < CFG_TUH_HID; i++) {
if (_hidh_itf[i].daddr == 0) return &_hidh_itf[i];
}
return NULL;
}
//--------------------------------------------------------------------+
// Interface API
//--------------------------------------------------------------------+
uint8_t tuh_hid_itf_get_count(uint8_t daddr) {
uint8_t count = 0;
for (uint8_t i = 0; i < CFG_TUH_HID; i++) {
if (_hidh_itf[i].daddr == daddr) count++;
}
return count;
}
uint8_t tuh_hid_itf_get_total_count(void) {
uint8_t count = 0;
for (uint8_t i = 0; i < CFG_TUH_HID; i++) {
if (_hidh_itf[i].daddr != 0) count++;
}
return count;
}
bool tuh_hid_mounted(uint8_t daddr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
return p_hid->mounted;
}
bool tuh_hid_itf_get_info(uint8_t daddr, uint8_t idx, tuh_itf_info_t* info) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid && info);
info->daddr = daddr;
// re-construct descriptor
tusb_desc_interface_t* desc = &info->desc;
desc->bLength = sizeof(tusb_desc_interface_t);
desc->bDescriptorType = TUSB_DESC_INTERFACE;
desc->bInterfaceNumber = p_hid->itf_num;
desc->bAlternateSetting = 0;
desc->bNumEndpoints = (uint8_t) ((p_hid->ep_in ? 1u : 0u) + (p_hid->ep_out ? 1u : 0u));
desc->bInterfaceClass = TUSB_CLASS_HID;
desc->bInterfaceSubClass = (p_hid->itf_protocol ? HID_SUBCLASS_BOOT : HID_SUBCLASS_NONE);
desc->bInterfaceProtocol = p_hid->itf_protocol;
desc->iInterface = 0; // not used yet
return true;
}
uint8_t tuh_hid_itf_get_index(uint8_t daddr, uint8_t itf_num) {
for (uint8_t idx = 0; idx < CFG_TUH_HID; idx++) {
hidh_interface_t const* p_hid = &_hidh_itf[idx];
if (p_hid->daddr == daddr && p_hid->itf_num == itf_num) return idx;
}
return TUSB_INDEX_INVALID_8;
}
uint8_t tuh_hid_interface_protocol(uint8_t daddr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
return p_hid ? p_hid->itf_protocol : 0;
}
//--------------------------------------------------------------------+
// Control Endpoint API
//--------------------------------------------------------------------+
uint8_t tuh_hid_get_protocol(uint8_t daddr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
return p_hid ? p_hid->protocol_mode : 0;
}
static void set_protocol_complete(tuh_xfer_t* xfer) {
uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex);
uint8_t const daddr = xfer->daddr;
uint8_t const idx = tuh_hid_itf_get_index(daddr, itf_num);
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid,);
if (XFER_RESULT_SUCCESS == xfer->result) {
p_hid->protocol_mode = (uint8_t) tu_le16toh(xfer->setup->wValue);
}
if (tuh_hid_set_protocol_complete_cb) {
tuh_hid_set_protocol_complete_cb(daddr, idx, p_hid->protocol_mode);
}
}
void tuh_hid_set_default_protocol(uint8_t protocol) {
_hidh_default_protocol = protocol;
}
static bool _hidh_set_protocol(uint8_t daddr, uint8_t itf_num, uint8_t protocol,
tuh_xfer_cb_t complete_cb, uintptr_t user_data) {
TU_LOG_DRV("HID Set Protocol = %d\r\n", protocol);
tusb_control_request_t const request = {
.bmRequestType_bit = {
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_CLASS,
.direction = TUSB_DIR_OUT
},
.bRequest = HID_REQ_CONTROL_SET_PROTOCOL,
.wValue = protocol,
.wIndex = itf_num,
.wLength = 0
};
tuh_xfer_t xfer = {
.daddr = daddr,
.ep_addr = 0,
.setup = &request,
.buffer = NULL,
.complete_cb = complete_cb,
.user_data = user_data
};
return tuh_control_xfer(&xfer);
}
bool tuh_hid_set_protocol(uint8_t daddr, uint8_t idx, uint8_t protocol) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid && p_hid->itf_protocol != HID_ITF_PROTOCOL_NONE);
return _hidh_set_protocol(daddr, p_hid->itf_num, protocol, set_protocol_complete, 0);
}
static void get_report_complete(tuh_xfer_t* xfer) {
TU_LOG_DRV("HID Get Report complete\r\n");
if (tuh_hid_get_report_complete_cb) {
uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex);
uint8_t const idx = tuh_hid_itf_get_index(xfer->daddr, itf_num);
uint8_t const report_type = tu_u16_high(xfer->setup->wValue);
uint8_t const report_id = tu_u16_low(xfer->setup->wValue);
tuh_hid_get_report_complete_cb(xfer->daddr, idx, report_id, report_type,
(xfer->result == XFER_RESULT_SUCCESS) ? xfer->setup->wLength : 0);
}
}
bool tuh_hid_get_report(uint8_t daddr, uint8_t idx, uint8_t report_id, uint8_t report_type, void* report, uint16_t len) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
TU_LOG_DRV("HID Get Report: id = %u, type = %u, len = %u\r\n", report_id, report_type, len);
tusb_control_request_t const request = {
.bmRequestType_bit = {
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_CLASS,
.direction = TUSB_DIR_IN
},
.bRequest = HID_REQ_CONTROL_GET_REPORT,
.wValue = tu_htole16(tu_u16(report_type, report_id)),
.wIndex = tu_htole16((uint16_t) p_hid->itf_num),
.wLength = len
};
tuh_xfer_t xfer = {
.daddr = daddr,
.ep_addr = 0,
.setup = &request,
.buffer = report,
.complete_cb = get_report_complete,
.user_data = 0
};
return tuh_control_xfer(&xfer);
}
static void set_report_complete(tuh_xfer_t* xfer) {
TU_LOG_DRV("HID Set Report complete\r\n");
if (tuh_hid_set_report_complete_cb) {
uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex);
uint8_t const idx = tuh_hid_itf_get_index(xfer->daddr, itf_num);
uint8_t const report_type = tu_u16_high(xfer->setup->wValue);
uint8_t const report_id = tu_u16_low(xfer->setup->wValue);
tuh_hid_set_report_complete_cb(xfer->daddr, idx, report_id, report_type,
(xfer->result == XFER_RESULT_SUCCESS) ? xfer->setup->wLength : 0);
}
}
bool tuh_hid_set_report(uint8_t daddr, uint8_t idx, uint8_t report_id, uint8_t report_type, void* report, uint16_t len) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
TU_LOG_DRV("HID Set Report: id = %u, type = %u, len = %u\r\n", report_id, report_type, len);
tusb_control_request_t const request = {
.bmRequestType_bit = {
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_CLASS,
.direction = TUSB_DIR_OUT
},
.bRequest = HID_REQ_CONTROL_SET_REPORT,
.wValue = tu_htole16(tu_u16(report_type, report_id)),
.wIndex = tu_htole16((uint16_t) p_hid->itf_num),
.wLength = len
};
tuh_xfer_t xfer = {
.daddr = daddr,
.ep_addr = 0,
.setup = &request,
.buffer = report,
.complete_cb = set_report_complete,
.user_data = 0
};
return tuh_control_xfer(&xfer);
}
static bool _hidh_set_idle(uint8_t daddr, uint8_t itf_num, uint16_t idle_rate,
tuh_xfer_cb_t complete_cb, uintptr_t user_data) {
// SET IDLE request, device can stall if not support this request
TU_LOG_DRV("HID Set Idle \r\n");
tusb_control_request_t const request = {
.bmRequestType_bit = {
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_CLASS,
.direction = TUSB_DIR_OUT
},
.bRequest = HID_REQ_CONTROL_SET_IDLE,
.wValue = tu_htole16(idle_rate),
.wIndex = tu_htole16((uint16_t) itf_num),
.wLength = 0
};
tuh_xfer_t xfer = {
.daddr = daddr,
.ep_addr = 0,
.setup = &request,
.buffer = NULL,
.complete_cb = complete_cb,
.user_data = user_data
};
return tuh_control_xfer(&xfer);
}
//--------------------------------------------------------------------+
// Interrupt Endpoint API
//--------------------------------------------------------------------+
// Check if HID interface is ready to receive report
bool tuh_hid_receive_ready(uint8_t dev_addr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(dev_addr, idx);
TU_VERIFY(p_hid);
return !usbh_edpt_busy(dev_addr, p_hid->ep_in);
}
bool tuh_hid_receive_report(uint8_t daddr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
// claim endpoint
TU_VERIFY(usbh_edpt_claim(daddr, p_hid->ep_in));
if (!usbh_edpt_xfer(daddr, p_hid->ep_in, p_hid->epin_buf, p_hid->epin_size)) {
usbh_edpt_release(daddr, p_hid->ep_in);
return false;
}
return true;
}
bool tuh_hid_receive_abort(uint8_t dev_addr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(dev_addr, idx);
TU_VERIFY(p_hid);
return tuh_edpt_abort_xfer(dev_addr, p_hid->ep_in);
}
bool tuh_hid_send_ready(uint8_t dev_addr, uint8_t idx) {
hidh_interface_t* p_hid = get_hid_itf(dev_addr, idx);
TU_VERIFY(p_hid);
return !usbh_edpt_busy(dev_addr, p_hid->ep_out);
}
bool tuh_hid_send_report(uint8_t daddr, uint8_t idx, uint8_t report_id, const void* report, uint16_t len) {
TU_LOG_DRV("HID Send Report %d\r\n", report_id);
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
if (p_hid->ep_out == 0) {
// This HID does not have an out endpoint (other than control)
return false;
} else if (len > CFG_TUH_HID_EPOUT_BUFSIZE ||
(report_id != 0 && len > (CFG_TUH_HID_EPOUT_BUFSIZE - 1))) {
// ep_out buffer is not large enough to hold contents
return false;
}
// claim endpoint
TU_VERIFY(usbh_edpt_claim(daddr, p_hid->ep_out));
if (report_id == 0) {
// No report ID in transmission
memcpy(&p_hid->epout_buf[0], report, len);
} else {
p_hid->epout_buf[0] = report_id;
memcpy(&p_hid->epout_buf[1], report, len);
++len; // 1 more byte for report_id
}
TU_LOG3_MEM(p_hid->epout_buf, len, 2);
if (!usbh_edpt_xfer(daddr, p_hid->ep_out, p_hid->epout_buf, len)) {
usbh_edpt_release(daddr, p_hid->ep_out);
return false;
}
return true;
}
//--------------------------------------------------------------------+
// USBH API
//--------------------------------------------------------------------+
bool hidh_init(void) {
TU_LOG_DRV("sizeof(hidh_interface_t) = %u\r\n", sizeof(hidh_interface_t));
tu_memclr(_hidh_itf, sizeof(_hidh_itf));
return true;
}
bool hidh_deinit(void) {
return true;
}
bool hidh_xfer_cb(uint8_t daddr, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes) {
(void) result;
uint8_t const dir = tu_edpt_dir(ep_addr);
uint8_t const idx = get_idx_by_epaddr(daddr, ep_addr);
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid);
if (dir == TUSB_DIR_IN) {
TU_LOG_DRV(" Get Report callback (%u, %u)\r\n", daddr, idx);
TU_LOG3_MEM(p_hid->epin_buf, xferred_bytes, 2);
tuh_hid_report_received_cb(daddr, idx, p_hid->epin_buf, (uint16_t) xferred_bytes);
} else {
if (tuh_hid_report_sent_cb) {
tuh_hid_report_sent_cb(daddr, idx, p_hid->epout_buf, (uint16_t) xferred_bytes);
}
}
return true;
}
void hidh_close(uint8_t daddr) {
for (uint8_t i = 0; i < CFG_TUH_HID; i++) {
hidh_interface_t* p_hid = &_hidh_itf[i];
if (p_hid->daddr == daddr) {
TU_LOG_DRV(" HIDh close addr = %u index = %u\r\n", daddr, i);
if (tuh_hid_umount_cb) tuh_hid_umount_cb(daddr, i);
tu_memclr(p_hid, sizeof(hidh_interface_t));
}
}
}
//--------------------------------------------------------------------+
// Enumeration
//--------------------------------------------------------------------+
bool hidh_open(uint8_t rhport, uint8_t daddr, tusb_desc_interface_t const* desc_itf, uint16_t max_len) {
(void) rhport;
(void) max_len;
TU_VERIFY(TUSB_CLASS_HID == desc_itf->bInterfaceClass);
TU_LOG_DRV("[%u] HID opening Interface %u\r\n", daddr, desc_itf->bInterfaceNumber);
// len = interface + hid + n*endpoints
uint16_t const drv_len = (uint16_t) (sizeof(tusb_desc_interface_t) + sizeof(tusb_hid_descriptor_hid_t) +
desc_itf->bNumEndpoints * sizeof(tusb_desc_endpoint_t));
TU_ASSERT(max_len >= drv_len);
uint8_t const* p_desc = (uint8_t const*) desc_itf;
//------------- HID descriptor -------------//
p_desc = tu_desc_next(p_desc);
tusb_hid_descriptor_hid_t const* desc_hid = (tusb_hid_descriptor_hid_t const*) p_desc;
TU_ASSERT(HID_DESC_TYPE_HID == desc_hid->bDescriptorType);
hidh_interface_t* p_hid = find_new_itf();
TU_ASSERT(p_hid); // not enough interface, try to increase CFG_TUH_HID
p_hid->daddr = daddr;
//------------- Endpoint Descriptors -------------//
p_desc = tu_desc_next(p_desc);
tusb_desc_endpoint_t const* desc_ep = (tusb_desc_endpoint_t const*) p_desc;
for (int i = 0; i < desc_itf->bNumEndpoints; i++) {
TU_ASSERT(TUSB_DESC_ENDPOINT == desc_ep->bDescriptorType);
TU_ASSERT(tuh_edpt_open(daddr, desc_ep));
if (tu_edpt_dir(desc_ep->bEndpointAddress) == TUSB_DIR_IN) {
p_hid->ep_in = desc_ep->bEndpointAddress;
p_hid->epin_size = tu_edpt_packet_size(desc_ep);
} else {
p_hid->ep_out = desc_ep->bEndpointAddress;
p_hid->epout_size = tu_edpt_packet_size(desc_ep);
}
p_desc = tu_desc_next(p_desc);
desc_ep = (tusb_desc_endpoint_t const*) p_desc;
}
p_hid->itf_num = desc_itf->bInterfaceNumber;
// Assume bNumDescriptors = 1
p_hid->report_desc_type = desc_hid->bReportType;
p_hid->report_desc_len = tu_unaligned_read16(&desc_hid->wReportLength);
// Per HID Specs: default is Report protocol, though we will force Boot protocol when set_config
p_hid->protocol_mode = _hidh_default_protocol;
if (HID_SUBCLASS_BOOT == desc_itf->bInterfaceSubClass) {
p_hid->itf_protocol = desc_itf->bInterfaceProtocol;
}
return true;
}
//--------------------------------------------------------------------+
// Set Configure
//--------------------------------------------------------------------+
enum {
CONFG_SET_IDLE,
CONFIG_SET_PROTOCOL,
CONFIG_GET_REPORT_DESC,
CONFIG_COMPLETE
};
static void config_driver_mount_complete(uint8_t daddr, uint8_t idx, uint8_t const* desc_report, uint16_t desc_len);
static void process_set_config(tuh_xfer_t* xfer);
bool hidh_set_config(uint8_t daddr, uint8_t itf_num) {
tusb_control_request_t request;
request.wIndex = tu_htole16((uint16_t) itf_num);
tuh_xfer_t xfer;
xfer.daddr = daddr;
xfer.result = XFER_RESULT_SUCCESS;
xfer.setup = &request;
xfer.user_data = CONFG_SET_IDLE;
// fake request to kick-off the set config process
process_set_config(&xfer);
return true;
}
static void process_set_config(tuh_xfer_t* xfer) {
// Stall is a valid response for SET_IDLE, sometime SET_PROTOCOL as well
// therefore we could ignore its result
if (!(xfer->setup->bRequest == HID_REQ_CONTROL_SET_IDLE ||
xfer->setup->bRequest == HID_REQ_CONTROL_SET_PROTOCOL)) {
TU_ASSERT(xfer->result == XFER_RESULT_SUCCESS,);
}
uintptr_t const state = xfer->user_data;
uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex);
uint8_t const daddr = xfer->daddr;
uint8_t const idx = tuh_hid_itf_get_index(daddr, itf_num);
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid,);
switch (state) {
case CONFG_SET_IDLE: {
// Idle rate = 0 mean only report when there is changes
const uint16_t idle_rate = 0;
const uintptr_t next_state = (p_hid->itf_protocol != HID_ITF_PROTOCOL_NONE)
? CONFIG_SET_PROTOCOL : CONFIG_GET_REPORT_DESC;
_hidh_set_idle(daddr, itf_num, idle_rate, process_set_config, next_state);
break;
}
case CONFIG_SET_PROTOCOL:
_hidh_set_protocol(daddr, p_hid->itf_num, _hidh_default_protocol, process_set_config, CONFIG_GET_REPORT_DESC);
break;
case CONFIG_GET_REPORT_DESC:
// Get Report Descriptor if possible
// using usbh enumeration buffer since report descriptor can be very long
if (p_hid->report_desc_len > CFG_TUH_ENUMERATION_BUFSIZE) {
TU_LOG_DRV("HID Skip Report Descriptor since it is too large %u bytes\r\n", p_hid->report_desc_len);
// Driver is mounted without report descriptor
config_driver_mount_complete(daddr, idx, NULL, 0);
} else {
tuh_descriptor_get_hid_report(daddr, itf_num, p_hid->report_desc_type, 0,
usbh_get_enum_buf(), p_hid->report_desc_len,
process_set_config, CONFIG_COMPLETE);
}
break;
case CONFIG_COMPLETE: {
uint8_t const* desc_report = usbh_get_enum_buf();
uint16_t const desc_len = tu_le16toh(xfer->setup->wLength);
config_driver_mount_complete(daddr, idx, desc_report, desc_len);
break;
}
default:
break;
}
}
static void config_driver_mount_complete(uint8_t daddr, uint8_t idx, uint8_t const* desc_report, uint16_t desc_len) {
hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
TU_VERIFY(p_hid,);
p_hid->mounted = true;
// enumeration is complete
if (tuh_hid_mount_cb) tuh_hid_mount_cb(daddr, idx, desc_report, desc_len);
// notify usbh that driver enumeration is complete
usbh_driver_set_config_complete(daddr, p_hid->itf_num);
}
//--------------------------------------------------------------------+
// Report Descriptor Parser
//--------------------------------------------------------------------+
uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info_arr, uint8_t arr_count,
uint8_t const* desc_report, uint16_t desc_len) {
// Report Item 6.2.2.2 USB HID 1.11
union TU_ATTR_PACKED {
uint8_t byte;
struct TU_ATTR_PACKED {
uint8_t size : 2;
uint8_t type : 2;
uint8_t tag : 4;
};
} header;
tu_memclr(report_info_arr, arr_count * sizeof(tuh_hid_report_info_t));
uint8_t report_num = 0;
tuh_hid_report_info_t* info = report_info_arr;
// current parsed report count & size from descriptor
// uint8_t ri_report_count = 0;
// uint8_t ri_report_size = 0;
uint8_t ri_collection_depth = 0;
while (desc_len && report_num < arr_count) {
header.byte = *desc_report++;
desc_len--;
uint8_t const tag = header.tag;
uint8_t const type = header.type;
uint8_t const size = header.size;
uint8_t const data8 = desc_report[0];
TU_LOG(3, "tag = %d, type = %d, size = %d, data = ", tag, type, size);
for (uint32_t i = 0; i < size; i++) {
TU_LOG(3, "%02X ", desc_report[i]);
}
TU_LOG(3, "\r\n");
switch (type) {
case RI_TYPE_MAIN:
switch (tag) {
case RI_MAIN_INPUT: break;
case RI_MAIN_OUTPUT: break;
case RI_MAIN_FEATURE: break;
case RI_MAIN_COLLECTION:
ri_collection_depth++;
break;
case RI_MAIN_COLLECTION_END:
ri_collection_depth--;
if (ri_collection_depth == 0) {
info++;
report_num++;
}
break;
default:break;
}
break;
case RI_TYPE_GLOBAL:
switch (tag) {
case RI_GLOBAL_USAGE_PAGE:
// only take in account the "usage page" before REPORT ID
if (ri_collection_depth == 0) memcpy(&info->usage_page, desc_report, size);
break;
case RI_GLOBAL_LOGICAL_MIN: break;
case RI_GLOBAL_LOGICAL_MAX: break;
case RI_GLOBAL_PHYSICAL_MIN: break;
case RI_GLOBAL_PHYSICAL_MAX: break;
case RI_GLOBAL_REPORT_ID:
info->report_id = data8;
break;
case RI_GLOBAL_REPORT_SIZE:
// ri_report_size = data8;
break;
case RI_GLOBAL_REPORT_COUNT:
// ri_report_count = data8;
break;
case RI_GLOBAL_UNIT_EXPONENT: break;
case RI_GLOBAL_UNIT: break;
case RI_GLOBAL_PUSH: break;
case RI_GLOBAL_POP: break;
default: break;
}
break;
case RI_TYPE_LOCAL:
switch (tag) {
case RI_LOCAL_USAGE:
// only take in account the "usage" before starting REPORT ID
if (ri_collection_depth == 0) info->usage = data8;
break;
case RI_LOCAL_USAGE_MIN: break;
case RI_LOCAL_USAGE_MAX: break;
case RI_LOCAL_DESIGNATOR_INDEX: break;
case RI_LOCAL_DESIGNATOR_MIN: break;
case RI_LOCAL_DESIGNATOR_MAX: break;
case RI_LOCAL_STRING_INDEX: break;
case RI_LOCAL_STRING_MIN: break;
case RI_LOCAL_STRING_MAX: break;
case RI_LOCAL_DELIMITER: break;
default: break;
}
break;
// error
default: break;
}
desc_report += size;
desc_len -= size;
}
for (uint8_t i = 0; i < report_num; i++) {
info = report_info_arr + i;
TU_LOG_DRV("%u: id = %u, usage_page = %u, usage = %u\r\n", i, info->report_id, info->usage_page, info->usage);
}
return report_num;
}
#endif
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