#ifndef _FIFO_H_ #define _FIFO_H_ #include #include typedef struct { uint8_t volatile count; // # Zeichen im Puffer uint8_t size; // Puffer-Größe uint8_t *pread; // Lesezeiger uint8_t *pwrite; // Schreibzeiger uint8_t read2end, write2end; // # Zeichen bis zum Überlauf Lese-/Schreibzeiger } fifo_t; extern void fifo_init(fifo_t *, uint8_t * buf, const uint8_t size); extern uint8_t fifo_put(fifo_t *, const uint8_t data); extern uint8_t fifo_get_wait(fifo_t *); extern int fifo_get_nowait(fifo_t *); static inline uint8_t _inline_fifo_put(fifo_t * f, const uint8_t data) { if (f->count >= f->size) return 0; uint8_t *pwrite = f->pwrite; *(pwrite++) = data; uint8_t write2end = f->write2end; if (--write2end == 0) { write2end = f->size; pwrite -= write2end; } f->write2end = write2end; f->pwrite = pwrite; uint8_t sreg = SREG; cli(); f->count++; SREG = sreg; return 1; } static inline uint8_t _inline_fifo_get(fifo_t * f) { uint8_t *pread = f->pread; uint8_t data = *(pread++); uint8_t read2end = f->read2end; if (--read2end == 0) { read2end = f->size; pread -= read2end; } f->pread = pread; f->read2end = read2end; uint8_t sreg = SREG; cli(); f->count--; SREG = sreg; return data; } #endif /* _FIFO_H_ */