f281xcap.c

TI公司28XDSP控制永磁同步电机(PMSM)

/* ==================================================================================
File name:       F281XCAP.C
                    
Originator:	Digital Control Systems Group
			Texas Instruments

Description:  This file contains source for the Capture drivers for the F281X using EVA

Target: TMS320F281x family
    
=====================================================================================
History:
-------------------------------------------------------------------------------------
 04-15-2005	Version 3.20: Using DSP281x v. 1.00 or higher 
------------------------------------------------------------------------------------*/

#include "DSP281x_Device.h"
#include "f281xcap.h"

void  F281X_EV1_CAP_Init(CAPTURE *p)
{
        EvaRegs.CAPCONA.all = CAP_INIT_STATE;      // Set up capture units 
        EvaRegs.T2CON.all = TIMER_INIT_STATE;      // Set up capture timer
        EvaRegs.T2PR = 0x7FFF;                     // Set up timer period

        EALLOW;                       // Enable EALLOW 
        GpioMuxRegs.GPAMUX.all |= 0x0700;     // Set up the capture pins to primary functions
        EDIS;                         // Disable EALLOW
}    


Uint16 F281X_EV1_CAP_Read(CAPTURE *p)
{
        if((EvaRegs.CAPFIFOA.all&0x0100) != 0)  // Check status of one entry of CAP1
        {
        p->TimeStamp = EvaRegs.CAP1FIFO;        // Stamp the timer counter when an edge is detected
        return(0);                              // Then, return zero
        } 
        else
        {
        return(1);                              // Else, return one
        }

}