| Variable | Description/Algorithm | Stored/Used |
| dsp_rdy | DSP is Busy writing data to Buffer No more Stack Words from DSP FPGA |
|
| Nbind | Number of indices to buffered events • Nbind = 16 (probably) |
Buffer i Ptrs |
| Nchan | Number of input channels used by this DSP • Nchan >= 16 |
Buffer Manager |
| Nmem | Size (in words) of Buffer Main Memory • Nmem = Nbind*Ave(chan-evt-size) |
Buffer i |
| Novf | Size (in words) of Buffer Overflow Memory • Novf = Max(chan-evt-size) |
Buffer i |
| buff_full | Current Buffer is full Conditions for this: • Nbind events already in buffer pointer struct • Not enough memory in buffer If b_addr[write_ind] > b_addr[read_ind] o b_addr[write_ind]+wrdcnt > ovfl_end If b_addr[write_ind] < b_addr[read_ind] o b_addr[write_ind]+wrdcnt > b_addr[read_ind] | Buffer Manager |
| chan_no | Current channel no. for write After full channel written: • next(chan_no) = mod(chan_no+1,Nchan) • (unless there is an overflow) |
Buffer Manager |
| write_ind | Index for next write After full event written: • next(write_ind) = mod(write_ind+1,Nbind) | Buffer Manager |
| read_ind | Index for next read After read: • next(read_ind) = mod(read_ind+1,Nbind) | Buffer Manager |