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PCD
Parameters: mode is dependent on the chip. For example, some chips allow speed setting
such as OSC_8MHZ or OSC_32KHZ. Other chips permit changing the source like
OSC_TIMER1.
The finetune (only allowed on certain parts) is a signed int with a range of -31 to
+31.
Returns:
Function:
Some chips return a state such as OSC_STATE_STABLE to indicate the oscillator
is stable .
This function controls and returns the state of the internal RC oscillator on some
parts. See the devices .h file for valid options for a particular device.
Note that if INTRC or INTRC_IO is specified in #fuses and a #USE DELAY is
used for a valid speed option, then the compiler will do this setup automatically at
the start of main().
WARNING: If the speed is changed at run time the compiler may not generate the
correct delays for some built in functions. The last #USE DELAY encountered in
the file is always assumed to be the correct speed. You can have multiple #USE
DELAY lines to control the compilers knowledge about the speed.
Availability: Only parts with a OSCCON register.
Requires:
Examples:
Example
Files:
Also See:
Constants are defined in the .h file.
setup_oscillator( OSC_2MHZ );
None
#FUSES, Internal oscillator Overview
setup_pmp(option,address_mask)
Syntax:
setup_pmp( options,address_mask );
Parameters: options - The mode of the Parallel Master Port that allows to set the Master Port
mode, read-write strobe options and other functionality of the PMPort module. See
the device's .h file for all options. Some typical options include:
·
·
PAR_PSP_AUTO_INC
PAR_CONTINUE_IN_IDLE
·
·
PAR_INTR_ON_RW
PAR_INC_ADDR
//Interrupt on read write
//Increment address by 1 every
//read/write cycle
270
· PAR_MASTER_MODE_1
//Master Mode 1
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