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espressif_tinyusb
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improve hid parser

This commit is contained in:
hathach 2021-05-22 20:54:59 +07:00
parent 350dfb2ea3
commit ad845db6a5
3 changed files with 50 additions and 62 deletions
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50
examples/host/cdc_msc_hid/src/hid_app.c
View File

@ -37,14 +37,16 @@
static uint8_t const keycode2ascii[128][2] = { HID_KEYCODE_TO_ASCII };
// Each HID instance can has multiple reports
static uint8_t _report_count[CFG_TUH_HID];
static tuh_hid_report_info_t _report_info[CFG_TUH_HID][MAX_REPORT];
static tuh_hid_report_info_t _report_info_arr[CFG_TUH_HID][MAX_REPORT];
static void process_kbd_report(hid_keyboard_report_t const *report);
static void process_mouse_report(hid_mouse_report_t const * report);
void hid_app_task(void)
{
// nothing to do
}
//--------------------------------------------------------------------+
@ -55,21 +57,13 @@ void tuh_hid_mounted_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_
{
printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
// Parse report descriptor with built-in parser
_report_count[instance] = tuh_hid_parse_report_descriptor(_report_info[instance], MAX_REPORT, desc_report, desc_len);
if (_report_count[instance])
{
printf("Composite with %u reports", _report_count[instance]);
}else
{
printf("Single report");
}
// Interface protocol
const char* protocol_str[] = { "None", "Keyboard", "Mouse" }; // hid_protocol_type_t
uint8_t const interface_protocol = tuh_hid_interface_protocol(dev_addr, instance);
printf(", Interface protocol = %s, ", protocol_str[interface_protocol]);
// Parse report descriptor with built-in parser
_report_count[instance] = tuh_hid_parse_report_descriptor(_report_info_arr[instance], MAX_REPORT, desc_report, desc_len);
printf("HID has %u reports and interface protocol = %s\r\n", _report_count[instance], protocol_str[interface_protocol]);
}
void tuh_hid_unmounted_cb(uint8_t dev_addr, uint8_t instance)
@ -82,20 +76,36 @@ void tuh_hid_get_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* re
(void) dev_addr;
uint8_t const rpt_count = _report_count[instance];
tuh_hid_report_info_t* rpt_info;
tuh_hid_report_info_t* rpt_info_arr = _report_info_arr[instance];
tuh_hid_report_info_t* rpt_info = NULL;
if (rpt_count)
if ( rpt_count == 1 && rpt_info_arr[0].report_id == 0)
{
// Simple report without report ID as 1st byte
rpt_info = &rpt_info_arr[0];
}else
{
// Composite report, 1st byte is report ID, data starts from 2nd byte
// Note: report index = report ID - 1
uint8_t idx = report[0] - 1;
rpt_info = &_report_info[instance][idx];
uint8_t const rpt_id = report[0];
// Find report id in the arrray
for(uint8_t i=0; i<rpt_count; i++)
{
if (rpt_id == rpt_info_arr[i].report_id )
{
rpt_info = &rpt_info_arr[i];
break;
}
}
report++;
len--;
}else
}
if (!rpt_info)
{
rpt_info = &_report_info[instance][0];
printf("Couldn't find the report info for this report !\r\n");
return;
}
if ( rpt_info->usage_page == HID_USAGE_PAGE_DESKTOP )

56
src/class/hid/hid_host.c
View File

@ -337,7 +337,7 @@ bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_request_t co
// Report Descriptor Parser
//--------------------------------------------------------------------+
uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint8_t arr_count, uint8_t const* desc_report, uint16_t desc_len)
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
@ -351,18 +351,16 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
};
} header;
uint8_t report_num = 0;
tuh_hid_report_info_t* info = report_info;
tu_memclr(report_info_arr, arr_count*sizeof(tuh_hid_report_info_t));
tu_memclr(report_info, 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;
uint16_t ri_usage_page = 0;
uint8_t ri_usage = 0;
while(desc_len && report_num < arr_count)
{
@ -394,6 +392,11 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
case RI_MAIN_COLLECTION_END:
ri_collection_depth--;
if (ri_collection_depth == 0)
{
info++;
report_num++;
}
break;
default: break;
@ -404,11 +407,8 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
switch(tag)
{
case RI_GLOBAL_USAGE_PAGE:
// only take in account the "usage page" before starting COLLECTION
if ( ri_collection_depth == 0)
{
memcpy(&ri_usage_page, desc_report, size);
}
// 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;
@ -417,23 +417,7 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
case RI_GLOBAL_PHYSICAL_MAX : break;
case RI_GLOBAL_REPORT_ID:
report_num++;
if (data8 <= arr_count)
{
uint8_t const idx = data8 - 1;
if ( info != &report_info[idx] )
{
// copy info so far to its correct report ID, and update info pointer
report_info[idx] = *info;
info = &report_info[idx];
}
info->usage_page = ri_usage_page;
info->usage = ri_usage;
}else
{
TU_LOG2("HID Skip a report with ID (%u) larger than array count (%u)\r\n", data8, arr_count);
}
info->report_id = data8;
break;
case RI_GLOBAL_REPORT_SIZE:
@ -457,8 +441,8 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
switch(tag)
{
case RI_LOCAL_USAGE:
// only take in account the "usage" before starting COLLECTION
if ( ri_collection_depth == 0) ri_usage = data8;
// 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;
@ -482,16 +466,10 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
desc_len -= size;
}
if ( report_num == 0 )
for ( uint8_t i = 0; i < report_num; i++ )
{
report_info[0].usage_page = ri_usage_page;
report_info[0].usage = ri_usage;
}
for ( uint8_t i = 0; (i < report_num) || (!i && !report_num); i++ )
{
info = report_info+i;
TU_LOG2("%u: usage_page = %u, usage = %u\r\n", i, info->usage_page, info->usage);
info = report_info_arr+i;
TU_LOG2("%u: id = %u, usage_page = %u, usage = %u\r\n", i, info->report_id, info->usage_page, info->usage);
}
return report_num;

6
src/class/hid/hid_host.h
View File

@ -53,8 +53,9 @@
typedef struct
{
uint8_t report_id;
uint8_t usage;
uint16_t usage_page;
uint8_t usage;
// TODO still use the endpoint size for now
// uint8_t in_len; // length of IN report
@ -83,9 +84,8 @@ bool tuh_hid_get_protocol(uint8_t dev_addr, uint8_t instance);
bool tuh_hid_set_protocol(uint8_t dev_addr, uint8_t instance, uint8_t protocol);
// Parse report descriptor into array of report_info struct and return number of reports.
// If return 0, this is a ingle report, otherwise it is composite report with 1st byte as ID.
// For complicated report, application should write its own parser.
uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint8_t arr_count, uint8_t const* desc_report, uint16_t desc_len) TU_ATTR_UNUSED;
uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* reports_info_arr, uint8_t arr_count, uint8_t const* desc_report, uint16_t desc_len) TU_ATTR_UNUSED;
// Check if the interface is ready to use
//bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance);