memory full

[Gevo]

Hi all,

I have a application with the 16F882 and have add some data. But the memory is run over.
The '882 = 2048 words, "883 is only 4096 words.

I drive a LCD (1602) RS485 and some LEDs and buttons. Not really exciting.

But, I have 30 Hub's (0 to 29) to Open and Close and show on the LCD.

All 30 Open and Close strings are different.


After 8 Hub's in the program the memory ("882) runs out. Any advice?


Hub_ID = 0 ' Hub Open

high EN_RS485 ' Enable RS485
pause 5
hserout [0,2,0,16,67,45,255,15,222,3] ' Bus open
LCDOut $fe,$C0,"Hub ",dec Hub_ID, " is Open "
pause 5 ' Wait for last byte out
low EN_RS485 ' Disable RS485

pause 1000

high EN_RS485 ' Enable RS485
pause 5
hserout [0,2,0,16,67,47,255,15,220,3] ' Bus close
LCDOut $fe,$C0,"Hub ",dec Hub_ID, " is Close "
pause 5 ' Wait for last byte out
low EN_RS485 ' Disable RS485

pause 1000


' Do next Hub

[Jerson]

Are you repeating the same code 30 times since the messages differ? Then, possibly, you could be facing this issue as strings gobble up memory pretty fast.

I would look at the feasibility of building subroutines that take the hubid and printing out messages that would be/could be common. That will bring in some reduction.

By your description, the picture is not entirely clear, so, I could be off on my diagnoses.

[HenrikOlsson]

Yeah, lots of repeating code there...
For starters, move the LCDOUT commands to a subroutine.
Unless you're running HSEROUT at 150baud or something you can most likely remove the PAUSE 5 after LCDOUT since LCDOUT will take way more time to execute that what it takes the USART to spit out that last byte.

Main:
  Hub_ID = 0 ' Hub Open

  high EN_RS485 ' Enable RS485
  pause 5
  hserout [0,2,0,16,67,45,255,15,222,3] ' Bus open
  GOSUB ShowHubOpen
  low EN_RS485 ' Disable RS485

  pause 1000

  high EN_RS485 ' Enable RS485
  pause 5
  hserout [0,2,0,16,67,47,255,15,220,3] ' Bus close
  GOSUB ShowHubClosed
  low EN_RS485 ' Disable RS485

  pause 1000

' Do next Hub

Goto Main

ShowHubOpen:
  LCDOut $fe,$C0,"Hub ",dec Hub_ID, " is Open "
RETURN

ShowHubClosed:
  LCDOut $fe,$C0,"Hub ",dec Hub_ID, " is Close "
RETURN

Next, how different are the HSEROUT strings for each hub? I see only two bytes differ in the open/close commands for Hub 0, what do they look like for Hub 1? What's the "pattern"?

If only two bytes changes between hub and command then have an array with the 10 bytes, change what's needed and GOSUB a subroutine that spits out the array. Like:

Cmd VAR BYTE[10]
Cmd[0] = 0
Cmd[1] = 2
Cmd[2] = 0
Cmd[3] = 16
Cmd[4] = 67
Cmd[5] = 45
Cmd[6] = 255
Cmd[7] = 15
Cmd[8] = 222
Cmd[9] = 3

GOSUB SendCmd


SendCmd:
  HSEROUT [STR Cmd\10]
RETURN

For the next hub/command, you simply change the bytes that needs changing (or re-write them all if you're not THAT tight on space) and then GOSUB SendCmd.

/Henrik.