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add tud_descriptor_string_cb() for getting string descriptor from application

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- remove tud_desc_set.string_arr/string_count
This commit is contained in:
hathach
2019-05-11 16:31:08 +07:00
parent bfa073818c
commit de56a0ca89
8 changed files with 208 additions and 137 deletions
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66
examples/device/msc_dual_lun/src/usb_descriptors.c
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@@ -82,29 +82,53 @@ uint8_t const desc_configuration[] =
TUD_MSC_DESCRIPTOR(ITF_NUM_MSC, 0, EPNUM_MSC, 0x80 | EPNUM_MSC, 64), // highspeed 512
};
//------------- String Descriptors -------------//
// array of pointer to string descriptors
uint16_t const * const string_desc_arr [] =
{
// 0: is supported language = English
TUD_DESC_STRCONV(0x0409),
// 1: Manufacturer
TUD_DESC_STRCONV('t', 'i', 'n', 'y', 'u', 's', 'b', '.', 'o', 'r', 'g'),
// 2: Product
TUD_DESC_STRCONV('t', 'i', 'n', 'y', 'u', 's', 'b', ' ', 'd', 'e', 'v', 'i', 'c', 'e'),
// 3: Serials, should use chip ID
TUD_DESC_STRCONV('1', '2', '3', '4', '5', '6')
};
// tud_desc_set is required by tinyusb stack
tud_desc_set_t tud_desc_set =
{
.device = &desc_device,
.config = desc_configuration,
.string_arr = (uint8_t const **) string_desc_arr,
.string_count = sizeof(string_desc_arr)/sizeof(string_desc_arr[0]),
.hid_report = NULL,
.device = &desc_device,
.config = desc_configuration,
#if CFG_TUD_HID
.hid_report = desc_hid_report,
#endif
};
//------------- String Descriptors -------------//
// array of pointer to string descriptors
char const* string_desc_arr [] =
{
(const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
"TinyUSB", // 1: Manufacturer
"TinyUSB Device", // 2: Product
"123456", // 3: Serials, should use chip ID
};
// Invoked when received GET_STRING_DESC request
// max_char is CFG_TUD_ENDOINT0_SIZE/2 -1, typically max_char = 31 if Endpoint0 size is 64
// Return number of characters. Note usb string is in 16-bits unicode format
uint8_t tud_descriptor_string_cb(uint8_t index, uint16_t* desc, uint8_t max_char)
{
if ( index == 0)
{
memcpy(desc, string_desc_arr[0], 2);
return 1;
}else
{
if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return 0;
const char* str = string_desc_arr[index];
// Cap at max char
uint8_t count = strlen(str);
if ( count > max_char ) count = max_char;
for(uint8_t i=0; i<count; i++)
{
*desc++ = str[i];
}
return count;
}
}