| ??? 03/04/10 07:49 Read: times |
#173819 - Interrupts aren't the biggest problem ... Responding to: ???'s previous message |
Erik Malund said:
alarm = T2L + ticks;
while (T2L != alarm) ; non-functional code, what if an interrupt happens. If so, T2L can be == alarm many times before you detect it. I don't think interrupts are the biggest problem - what if the while loop takes more than one cycle to execute? Actually, that's no "if", that's pretty much certain. The uC is going to "miss" the instant during which the condition is true a few times, or possibly forever. "Fortunately", the 8051s timers have ways of telling the rest of the processor that a timer overflow has happened. Use those instead. |
| Topic | Author | Date |
| fixed length delays in C | 01/01/70 00:00 | |
| Can't do it without assembly. | 01/01/70 00:00 | |
| HLL gives no guarantees | 01/01/70 00:00 | |
| Using a timer in C | 01/01/70 00:00 | |
| overheads | 01/01/70 00:00 | |
| Use a dedicated timer | 01/01/70 00:00 | |
| non-functional code | 01/01/70 00:00 | |
| Interrupts aren't the biggest problem ... | 01/01/70 00:00 | |
break apart | 01/01/70 00:00 |