openqei.c

Microchip的官方PIC24H系列16位单片机的外设源程序库。

#include <qei.h>
#include <p30fxxxx.h>

/* QEI is defined in following devices */
#if defined(__dsPIC30F2010__) || defined(__dsPIC30F3010__) || defined(__dsPIC30F4012__) || \
    defined(__dsPIC30F3011__) || defined(__dsPIC30F4011__) || defined(__dsPIC30F6010__) || \
    defined(__dsPIC30F5015__)

/*********************************************************************
* Function Name     : OpenQEI()
* Description       : This function Clears the CNTERR bit and Configures register 
                      QEICON and DFLTCON for the QEI/Timer functionality.
* Parameters        : unsigned int config1, unsigned int config2
* Return Value      : None
*********************************************************************/

void OpenQEI(unsigned int config1, unsigned int config2)
{
    /* clear CNTERR bit */
    QEICONbits.CNTERR = 0;
	
    /* configures the QEI/Timer */
    QEICON = config1 & 0x2fff;

    QEICONbits.UPDN = config1 >>11; /* assign up/down  */

    /* configures the Digital Filters */
    DFLTCON = config2;
}

#endif