Multi chip code in same program

[Jim giordano]

I am trying to use the same program for different microprocessors. I tried the following code, but the compiler picked up the code from the second chip, even though I said to use the first block. Is there some limitation on #if I'm not understanding? I determined it was picking up the second block by looking in the asm file produced, it clearly call initpps2.

 #define chipno 1 ' 1=16F18324, 2=16F18426

 #if chipno=1
 #chip 16F18324,32
 #config RSTOSC=HFINT32, MCLRE=OFF
 #config FEXTOSC=OFF, CLKOUTEN=OFF, WRT=OFF, CPD=on

 #startup InitPPS, 85
 Sub InitPPS
    UNLOCKPPS
        SSP1CLKPPS = 0x10        ' RC0->MSSP1:SCL1
        SSP1DATPPS = 0x11        ' RC1->MSSP1:SDA1
        RC0PPS = 0x18            ' RC0->MSSP1:SCL1
        RC1PPS = 0x19            ' RC1<-MSSP1:SDA1
      LOCKPPS
 End sub
 #endif

 #if chipno=2
 #chip 16F18426,32
 #config RSTOSC=HFINT32, MCLRE=OFF
 #config FEXTOSC=OFF, CLKOUTEN=OFF, WRT=OFF, CPD=on

 #startup InitPPS2, 85
 Sub InitPPS2
    UNLOCKPPS
        SSP1CLKPPS = 0x13        ' RC0->MSSP1:SCL1
        SSP1DATPPS = 0x14        ' RC1->MSSP1:SDA1
        RC0PPS = 0x18            ' RC0->MSSP1:SCL1
        RC1PPS = 0x19            ' RC1<-MSSP1:SDA1
      LOCKPPS
 End sub
 #endif

[Anobium]

I dont think you can do that the compiler looks for one #chip line. This could work as an approach but it does not as you cannot not substitute a constant on the chip line.

Look at what is shown below but in the context that the chipname substitution does not work.

Let me look into this.

 #define chipno 1 ' 1=16F18324, 2=16F18426

 #chip mychipname
 #config RSTOSC=HFINT32, MCLRE=OFF
 #config FEXTOSC=OFF, CLKOUTEN=OFF, WRT=OFF, CPD=on


  #script
      if chipno=1 then
          mychipname =16F18324
      end if
      if chipno=2 then
          mychipname =16F18426
      end if
  #endscript


 #startup InitPPS, 85
 Sub InitPPS
    UNLOCKPPS
       #if chipno=1
        SSP1CLKPPS = 0x10        ' RC0->MSSP1:SCL1
        SSP1DATPPS = 0x11        ' RC1->MSSP1:SDA1
        RC0PPS = 0x18            ' RC0->MSSP1:SCL1
        RC1PPS = 0x19            ' RC1<-MSSP1:SDA1
       #endif
       #if chipno=2
        SSP1CLKPPS = 0x13        ' RC0->MSSP1:SCL1
        SSP1DATPPS = 0x14        ' RC1->MSSP1:SDA1
        RC0PPS = 0x18            ' RC0->MSSP1:SCL1
        RC1PPS = 0x19            ' RC1<-MSSP1:SDA1
       #endif
    LOCKPPS
 End sub

[Jim giordano]

I thought I might tackle it the opposite direction and just define the wanted chip with the correct #chip 16F18324,32 at the top and just test
by using #if ChipNameStr="16F18324" , but the #if always fails. I guess ChipNameStr isn't available yet at that point in the compilation where #if is evaluated?

This is not a big deal, Evan. I was just trying to clean up my code a little.

[mkstevo]

Not much help I'm afraid other than to say that when I was trying to do something similar I wrote two 'definition blocks' and commented one or the other out like this:

#Define Use1459
#Chip 16F1459, 48
#Config OSC=INTOSC, PLLEN=On
#Define LCD_RS              PortA.5 'A.0 and A.1 are In only on the 1459
#Define LCD_Enable      PortA.4 'so use A.5 and A.4 which are opposite

'#Define Use1829
'#Chip 16F1829, 32
'#Define LCD_RS                 PortA.0
'#Define LCD_Enable         PortA.1

Then within the code used stuff like this:

#IfDef Use1459
       Wait 100 mS
       Locate 1,0
       Print  "PIC16F1459 48Mhz"
       Wait 1500 mS
#EndIf

#IfDef Use1829
       Wait 100 mS
       Locate 1,0
       Print  "PIC16F1829 32Mhz"
       Wait 1500 mS
#EndIf

Which I'm sure you have worked out for yourself anyway...