Change maximum depth to 2^15 which allows for a fast modulo substitute.
Thus, however, overflows are detectable only for one time FIFO depth.
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@@ -48,7 +48,7 @@
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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extern "C" {
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#endif
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#if CFG_FIFO_MUTEX
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@@ -61,16 +61,16 @@
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*/
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typedef struct
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{
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uint8_t* buffer ; ///< buffer pointer
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uint16_t depth ; ///< max items
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uint16_t item_size ; ///< size of each item
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bool overwritable ;
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uint8_t* buffer ; ///< buffer pointer
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uint16_t depth ; ///< max items
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uint16_t item_size ; ///< size of each item
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bool overwritable ;
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uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length
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uint16_t max_pointer_idx ; ///< maximum absolute pointer index
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uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length
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uint16_t max_pointer_idx ; ///< maximum absolute pointer index
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volatile uint16_t wr_idx ; ///< write pointer
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volatile uint16_t rd_idx ; ///< read pointer
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volatile uint16_t wr_idx ; ///< write pointer
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volatile uint16_t rd_idx ; ///< read pointer
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#if CFG_FIFO_MUTEX
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tu_fifo_mutex_t mutex;
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@@ -78,16 +78,16 @@ typedef struct
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} tu_fifo_t;
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#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \
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uint8_t _name##_buf[_depth*sizeof(_type)]; \
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tu_fifo_t _name = { \
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.buffer = _name##_buf, \
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.depth = _depth, \
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.item_size = sizeof(_type), \
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.overwritable = _overwritable, \
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.non_used_index_space = 0x10000 % _depth, \
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.max_pointer_idx = 0xFFFF - (0x10000 % _depth), \
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}
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#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \
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uint8_t _name##_buf[_depth*sizeof(_type)]; \
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tu_fifo_t _name = { \
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.buffer = _name##_buf, \
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.depth = _depth, \
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.item_size = sizeof(_type), \
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.overwritable = _overwritable, \
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.max_pointer_idx = 2*_depth-1, \
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.non_used_index_space = 0xFFFF - 2*_depth-1, \
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}
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bool tu_fifo_clear(tu_fifo_t *f);
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bool tu_fifo_config(tu_fifo_t *f, void* buffer, uint16_t depth, uint16_t item_size, bool overwritable);
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@@ -131,7 +131,7 @@ static inline uint16_t tu_fifo_depth(tu_fifo_t* f)
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}
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#ifdef __cplusplus
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}
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}
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#endif
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#endif /* _TUSB_FIFO_H_ */
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