PicBasic Pro version 2.4 adds limited support for all the 12-bit core PICmicro microcontrollers. The reason the support is limited is that the resources on the 12-bit core devices are very limited. Some of these limits include only a two-level hardware stack and very small amounts of general purpose RAM memory. The code page size is also small at 512 bytes. There is also a limitation that calls and computed jumps can only be made to the first half (256 words) of any code page. These limitations have made it necessary to eliminate some compiler commands and modify the operation of some others.

While many useful programs can be written for the 12-bit core PICmicros using the PicBasic Pro Compiler, some applications will not be suited for these devices. Choosing a 14- or 16-bit core device with more resources will, in many cases, be the best solution.

Commands that are not supported for the 12-bit core PICmicros:

Command			Reason
Adcin			No internal ADCs
Data			No on-chip EEPROM
Dtmfout			Not enough RAM or stack
Eeprom			No on-chip EEPROM
Freqout			Not enough RAM or stack
Hpwm			No hardware PWM
Hserin			No hardware serial port
Hserout			No hardware serial port
On Interrupt			No Interrupts
Read			No on-chip EEPROM
Readcode			No flash devices
Resume			No Interrupts
Serin2			Not enough RAM or stack
Serout2			Not enough RAM or stack
USBIn			No USB devices
USBInit			No USB devices
USBOut			No USB devices
Write			No on-chip EEPROM
Writecode			No flash devices
Xin			Not enough RAM or stack
Xout			Not enough RAM or stack

Trying to use these commands with 12-bit core devices will result in numerous errors. If you must use one of these commands, choose a 14- or 16-bit core device with more resources.

Commands that have had their operation modified are:

Debug, Debugin

The Serin2 and Serout2 modifiers are not supported for these commands because of memory and stack size limits.

Lcdout

The Serout2 modifiers are not supported for this command because of memory and stack size limits.

OWIn, OWOut

The Rep, Skip and Str modifiers are not supported for these commands because of memory and stack size limits.

Serout

The open drain modes are not available due to TRIS register constraints.

Return to the PicBasic project section HERE
Buy PicBasic online HERE
Read more about the PicBasic compiler HERE

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