| ??? 04/13/07 02:53 Read: times |
#137094 - Other approach Responding to: ???'s previous message |
Mike Stegmaier said:
When my 8051 micro receives data from the PC, I have it store data in external RAM in sequential order.
If I wait for a particular string to come, and it comes after the RAM is full of data, then I could end up in trouble, because then I have to clear the ram, and by the time I try to clear the first byte, I might run out of machine cycles before the serial interrupt is called. There's no need to clear it. Just use a pointer to the next position in memory. When the pointer gets to the maximum buffer size, just wrap around. Thus you never clear memory but rather just keep wrapping around within the memory you've allocated as your buffer. Regards, Craig Steiner |
| Topic | Author | Date |
| refreshing serial data | 01/01/70 00:00 | |
| Other approach | 01/01/70 00:00 | |
| Circular or Ring Buffer | 01/01/70 00:00 | |
| A Yet More Clever Approach | 01/01/70 00:00 | |
| the data isn't always consistent | 01/01/70 00:00 | |
| PPP has maximum packet size | 01/01/70 00:00 | |
| I know | 01/01/70 00:00 | |
| here is why | 01/01/70 00:00 | |
not serious I hope | 01/01/70 00:00 | |
| Doesn't PPP have a defined packet format? | 01/01/70 00:00 | |
| mtu sizes | 01/01/70 00:00 | |
| what do you mean???? | 01/01/70 00:00 |