| ??? 10/05/09 12:13 Read: times |
#169417 - A few questions about internal RAM |
I want to write a program for a midi controller that will use constants (such as the channel to send data on etc.)that could change from one situation to the next. I thought one way of doing this would be to send a system exclusive message to the 8051 and write the value into internal RAM at a specific location; my software could then look in that location whenever in needed that value. I'd like to be able to program this once and not ever have to deal with it again until my setup changed, but if my setup changes, I don't want to have to reprogram the code memory of the chip. I'm concerned that RAM might not be stable enough to hold the values when the chip is reset. Can anyone offer some helpful hints? Does it help my cause that I'm using a MAX810 as the reset circuit? Does this have a prayer of working, or is my worry completely unnecessary? |
| Topic | Author | Date |
| A few questions about internal RAM | 01/01/70 00:00 | |
| questions | 01/01/70 00:00 | |
| through everything | 01/01/70 00:00 | |
| oops | 01/01/70 00:00 | |
| maybe | 01/01/70 00:00 | |
| I'm writing in asm | 01/01/70 00:00 | |
| EEPROM | 01/01/70 00:00 | |
| then RAM is NOT cleared on reset | 01/01/70 00:00 | |
| RE: RAM is NOT cleared on reset. | 01/01/70 00:00 | |
| nothing in the code | 01/01/70 00:00 | |
| RAM indeterminate after a hardware reset | 01/01/70 00:00 | |
| Great | 01/01/70 00:00 | |
| Good checksumming | 01/01/70 00:00 | |
| Please pardon my ignorance | 01/01/70 00:00 | |
| Knowing if initial contents is initialized or not. | 01/01/70 00:00 | |
| Battery-backed microcontroller | 01/01/70 00:00 | |
| Just use an 8051 with eeprom | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| alternatives | 01/01/70 00:00 | |
| Not just "alternative" - but "superior"! | 01/01/70 00:00 | |
| Great suggestions | 01/01/70 00:00 | |
that depends | 01/01/70 00:00 |