opentimer2.c

Mplab C30编译器

#if defined(__PIC24F__)
#include <p24Fxxxx.h>
#endif
#include <timer.h>

/*******************************************************************************
Function Prototype : void OpenTimer2(unsigned int config,unsigned int period)
 
Include            : timer.h
 
Description        : This function configures the 16-bit timer module.
 
Arguments          : config - This contains the parameters to be configured in
                     the T2CON register as defined below
						Timer Module On/Off						
						   T2_ON						
						   T2_OFF						
						Timer Module Idle mode On/Off						
						   T2_IDLE_CON						
						   T2_IDLE_STOP						
						Timer Gate time accumulation enable						
						   T2_GATE_ON						
						   T2_GATE_OFF						
						Timer prescaler						
						   T2_PS_1_1						
						   T2_PS_1_8						
						   T2_PS_1_64						
						   T2_PS_1_256						
						Timer Synchronous clock enable						
						   T2_SYNC_EXT_ON						
						   T2_SYNC_EXT_OFF						
						Timer clock source						
						   T2_SOURCE_EXT						
						   T2_SOURCE_INT						
					  period - This contains the period match value to be stored 
					  into the PR register 
 
Return Value      : None
 
Remarks           : This function configures the 16-bit Timer Control register and 
                    sets the period match value into the PR register. 
**********************************************************************************/
#ifdef _TIMER2

void OpenTimer2(unsigned int config,unsigned int period)
{
    TMR2  = 0;          /* Reset Timer2 to 0x0000 */
    PR2   = period;     /* assigning Period to Timer period register */
    T2CON = config;     /* configure control reg */
    T2CONbits.T32 = 0;
}

#else
#warning "Does not build on this target"
#endif