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LDmicro Forum - No such memory with pic 16f877 |
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No such memory with pic 16f877 (by Libero)
Hallo. I'm trying to realize a simple application for a church near my home.
In this application ther are 30 lamp-candles and a "gettoniera". When a coin is put into "gettoniera" a contact will be closed and the first lamp-candle goes on for 30 minutes. If another coin is putted in goes on the second lamp-candle and so. I have used 30 TOFF to measure the time on for each lamp-candle but when I try to compile the program I have a message "not enaugh memory..." If I reduce the lamps to 27 and compile, the compiler uses only 3639/8192 words and 44% memory. How can I solve this problem? I can't set a TOFF more than 1.600 sec, how is possible to set it to 1.800 minuts? Thank's Libero.
Other file (by Libero)
Here il the other file.
(no subject) (by Olivier Quirion)
put cycle time at 100ms instead of 50ms
(no subject) (by liberolibero)
@ Oliver Quirion
Thank's, TOFF problem is resolved Now I have only the great memory problem. I hope it is possible to have a solution. Libero.
(no subject) (by Jonathan Westhues)
As noted in the error message, timers are limited to 32767 cycle times; for an 1800 s delay, that implies a cycle time of at least 55 ms. So as Olivier notes, an increase to 100 ms will fix your problem.
You still have plenty of flash, but the 30-candle version runs out of RAM. It may barely fit if you simplify your program; for example, the RMx internal relays seem to all be equal to each other, so that can be collapsed down to a single bit. The RMLx relays could also be eliminated by moving the lamp test feature into the same rung as the TOF timers. Or, you could go to a part with more available RAM, for example most of the AVRs.
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