https://github.com/j123b567/scpi-parser
Dependents: scpi_sx127x scpi_sx127x_firstTest MLX90418_I2C_master
Diff: src/fifo.c
- Revision:
- 1:b497f235115a
- Parent:
- 0:aad43948c45c
--- a/src/fifo.c Thu Apr 09 22:42:15 2015 +0000 +++ b/src/fifo.c Fri Aug 07 21:54:11 2015 +0000 @@ -1,18 +1,32 @@ -#include "scpi/fifo.h" +#include "fifo_private.h" -void fifo_init(fifo_t * fifo) { +/** + * Initialize fifo + * @param fifo + */ +void fifo_init(scpi_fifo_t * fifo) { fifo->wr = 0; fifo->rd = 0; fifo->size = FIFO_SIZE; } -void fifo_clear(fifo_t * fifo) { +/** + * Empty fifo + * @param fifo + */ +void fifo_clear(scpi_fifo_t * fifo) { fifo->wr = 0; fifo->rd = 0; } -scpi_bool_t fifo_add(fifo_t * fifo, int16_t value) { +/** + * Add element to fifo. If fifo is full, remove last element. + * @param fifo + * @param value + * @return + */ +scpi_bool_t fifo_add(scpi_fifo_t * fifo, int16_t value) { /* FIFO full? */ if (fifo->wr == ((fifo->rd + fifo->size) % (fifo->size + 1))) { fifo_remove(fifo, NULL); @@ -24,7 +38,13 @@ return TRUE; } -scpi_bool_t fifo_remove(fifo_t * fifo, int16_t * value) { +/** + * Remove element form fifo + * @param fifo + * @param value + * @return FALSE - fifo is empty + */ +scpi_bool_t fifo_remove(scpi_fifo_t * fifo, int16_t * value) { /* FIFO empty? */ if (fifo->wr == fifo->rd) { return FALSE; @@ -39,7 +59,13 @@ return TRUE; } -scpi_bool_t fifo_count(fifo_t * fifo, int16_t * value) { +/** + * Retrive number of elements in fifo + * @param fifo + * @param value + * @return + */ +scpi_bool_t fifo_count(scpi_fifo_t * fifo, int16_t * value) { *value = fifo->wr - fifo->rd; if (*value < 0) { *value += (fifo->size + 1);