| ??? 12/15/04 18:00 Read: times |
#83176 - volatile. Responding to: ???'s previous message |
Quite frankly those typedefs are the result of the guidelines given by M.J.Pont in his Embedded C book. I somehow liked the concept and thought will use it. Yes, the concept is very good - it's just the naming that lets it down. You should define cntr_1, cntr_2 as volatile - otherwise the compiler may completely optimise this code away! It is the optimiser's job to remove useless code that simply wastes time and/or code space. These variables are never used within the loops, and never used again outside the loop - an optimising compiler is entitled to spot this and remove the apparently "useless" code. By declaring the variables as 'volatile' you tell the optimiser that all is not as simple as it seems, so it will not remove code referencing them. See your 'C' book for further details. |
| Topic | Author | Date |
| Help LCD--89C51 using KEIL | 01/01/70 00:00 | |
| RE | 01/01/70 00:00 | |
| Keil? | 01/01/70 00:00 | |
| Keil App Notes | 01/01/70 00:00 | |
| Assembler programmer learning C? | 01/01/70 00:00 | |
| So what happened to the USB, then? | 01/01/70 00:00 | |
| The wanted code... | 01/01/70 00:00 | |
| code | 01/01/70 00:00 | |
| Tips and Tricks.....Andy | 01/01/70 00:00 | |
| volatile. | 01/01/70 00:00 | |
| Not so volatile ? | 01/01/70 00:00 | |
| optimiser | 01/01/70 00:00 | |
| Volatile warning? | 01/01/70 00:00 | |
| not here | 01/01/70 00:00 | |
| re: volatile | 01/01/70 00:00 | |
| volatile | 01/01/70 00:00 | |
| Another comment - symbolic names | 01/01/70 00:00 | |
| c code for lcd | 01/01/70 00:00 | |
| code | 01/01/70 00:00 | |
| symbolic Port names | 01/01/70 00:00 | |
| There's Gratitude for you! :-( | 01/01/70 00:00 | |
A better method in C | 01/01/70 00:00 |