diff options
| author | Reinhard Panhuber <[email protected]> | 2020-09-23 20:48:03 +0200 |
|---|---|---|
| committer | Reinhard Panhuber <[email protected]> | 2020-09-23 20:48:03 +0200 |
| commit | 9bdeafb29503b65d2c46e71a4c7e80b753bad55a (patch) | |
| tree | d4618e9f5bcf34880fa05870cea180338026b78e /src/common/tusb_fifo.h | |
| parent | 21299f90faf501422706ce36b6d3bb7c55bb3ecb (diff) | |
Change maximum depth to 2^15 which allows for a fast modulo substitute.
Thus, however, overflows are detectable only for one time FIFO depth.
Diffstat (limited to 'src/common/tusb_fifo.h')
| -rw-r--r-- | src/common/tusb_fifo.h | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/src/common/tusb_fifo.h b/src/common/tusb_fifo.h index 66888ef19..23f5d8449 100644 --- a/src/common/tusb_fifo.h +++ b/src/common/tusb_fifo.h @@ -48,7 +48,7 @@ #include <stdbool.h> #ifdef __cplusplus - extern "C" { +extern "C" { #endif #if CFG_FIFO_MUTEX @@ -61,16 +61,16 @@ */ typedef struct { - uint8_t* buffer ; ///< buffer pointer - uint16_t depth ; ///< max items - uint16_t item_size ; ///< size of each item - bool overwritable ; + uint8_t* buffer ; ///< buffer pointer + uint16_t depth ; ///< max items + uint16_t item_size ; ///< size of each item + bool overwritable ; - uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length - uint16_t max_pointer_idx ; ///< maximum absolute pointer index + uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length + uint16_t max_pointer_idx ; ///< maximum absolute pointer index - volatile uint16_t wr_idx ; ///< write pointer - volatile uint16_t rd_idx ; ///< read pointer + volatile uint16_t wr_idx ; ///< write pointer + volatile uint16_t rd_idx ; ///< read pointer #if CFG_FIFO_MUTEX tu_fifo_mutex_t mutex; @@ -78,16 +78,16 @@ typedef struct } tu_fifo_t; -#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \ - uint8_t _name##_buf[_depth*sizeof(_type)]; \ - tu_fifo_t _name = { \ - .buffer = _name##_buf, \ - .depth = _depth, \ - .item_size = sizeof(_type), \ - .overwritable = _overwritable, \ - .non_used_index_space = 0x10000 % _depth, \ - .max_pointer_idx = 0xFFFF - (0x10000 % _depth), \ - } +#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \ + uint8_t _name##_buf[_depth*sizeof(_type)]; \ + tu_fifo_t _name = { \ + .buffer = _name##_buf, \ + .depth = _depth, \ + .item_size = sizeof(_type), \ + .overwritable = _overwritable, \ + .max_pointer_idx = 2*_depth-1, \ + .non_used_index_space = 0xFFFF - 2*_depth-1, \ + } bool tu_fifo_clear(tu_fifo_t *f); bool tu_fifo_config(tu_fifo_t *f, void* buffer, uint16_t depth, uint16_t item_size, bool overwritable); @@ -131,7 +131,7 @@ static inline uint16_t tu_fifo_depth(tu_fifo_t* f) } #ifdef __cplusplus - } +} #endif #endif /* _TUSB_FIFO_H_ */ |