B = Buffer
C = Calculation functions
The BC21Elements function makes it possible to know the number of items inserted in the FIFO.
BC21Elements (Buffer, Element, ErrorCode, head, tail)
Parameters:
| IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
|---|---|---|---|---|
| IN | ARRGBL/ ARRSYS | Buffer | B/W/L/S | Array containing the Buffer |
| OUT | GLOBAL | Element | L | Variable containing the number of elements included in the FIFO. |
| OUT | GLOBAL | ErrorCode | F | Variable containing the error possibly occurred during insertion of the value |
| IN | GLOBAL / SYSTEM | head | L | Internal index |
| IN | GLOBAL / SYSTEM | tail | L | Internal index |
Once invoked the function if there are any errors the error variable (ErrorCode) takes the following values:
0 - No error
1 - No data in FIFO.
2 - FIFO memory that contains data not correctly formatted.