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add device cdc wanted char callback, cdc peek

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This commit is contained in:
hathach
2018-07-14 23:28:07 +07:00
parent e0c4e11ea3
commit 19b6bbfd14
4 changed files with 50 additions and 18 deletions
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10
src/common/tusb_fifo.c
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@@ -166,7 +166,7 @@ uint16_t tu_fifo_read_n (tu_fifo_t* f, void * p_buffer, uint16_t count)
@param[in] f
Pointer to the FIFO buffer to manipulate
@param[in] position
@param[in] pos
Position to read from in the FIFO buffer
@param[in] p_buffer
Pointer to the place holder for data read from the buffer
@@ -174,13 +174,13 @@ uint16_t tu_fifo_read_n (tu_fifo_t* f, void * p_buffer, uint16_t count)
@returns TRUE if the queue is not empty
*/
/******************************************************************************/
bool tu_fifo_peek_at(tu_fifo_t* f, uint16_t position, void * p_buffer)
bool tu_fifo_peek_at(tu_fifo_t* f, uint16_t pos, void * p_buffer)
{
if ( !tu_fifo_initalized(f) ) return false;
if ( position >= f->count ) return false;
if ( pos >= f->count ) return false;
// rd_idx is position=0
uint16_t index = (f->rd_idx + position) % f->depth;
// rd_idx is pos=0
uint16_t index = (f->rd_idx + pos) % f->depth;
memcpy(p_buffer,
f->buffer + (index * f->item_size),
f->item_size);