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add string desc helper

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hathach 2018-08-21 14:51:59 +07:00
parent d996bd5295
commit 7b35cd0203
1 changed files with 6 additions and 1 deletions
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7
src/common/tusb_types.h
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@ -416,9 +416,14 @@ static inline uint8_t descriptor_len(uint8_t const p_desc[])
return p_desc[DESC_OFFSET_LEN];
}
// Length of the string descriptors in bytes with slen characters
#define TUD_DESC_STRLEN(_slen) (2*(_slen) + 2)
// Header of string descriptors with len + string type
#define TUD_DESC_STR_HEADER(_slen) ( (uint16_t) ( (TUSB_DESC_STRING << 8 ) | TUD_DESC_STRLEN(_slen)) )
// Convert comma-separated string to descriptor unicode format
#define TUD_DESC_STRCONV( ... ) (const uint16_t[]) { (TUSB_DESC_STRING << 8 ) | (2*VA_ARGS_NUM_(__VA_ARGS__) + 2), __VA_ARGS__ }
#define TUD_DESC_STRCONV( ... ) (const uint16_t[]) { TUD_DESC_STR_HEADER(VA_ARGS_NUM_(__VA_ARGS__)), __VA_ARGS__ }
#ifdef __cplusplus
}