f2407adc.c

TI公司的DSP(LF2407A)编写的有霍尔位置传感器的无刷直流电机控制程序,内含子程序说明

/*=====================================================================================================================
/* File name:       F2407ADC.C                    
/* This file contains source for the ADC Driver control module
/* Applicability of these functions is indicated in the Table 1               
/*================================================================================ */
#include <regs240x.h>
#include <F2407ADC.h>

void inline F2407_ADC_Init(ADCVALS *p)
{

        SCSR1=SCSR1|0x0080;                 /* Turn on the clocks to the ADC module*/
        CALIBRATION=CALIBRATION_CONSTANT;
      
        ADCTRL1=ADC_RESET_FLAG;             /* Reset the ADC Module    */
        ADCTRL1=ADCTRL1_INIT_STATE;         /* Set up ADCTRL1 register */
      	ADCTRL2=ADCTRL2_INIT_STATE;         /* Set up ADCTRL2 register */
        MAXCONV=3;                          /* Specify four conversions  */

        CHSELSEQ1=p->ChSelect;       	   /* Configure channel selection */ 
}            
       


void F2407_ADC_Read(ADCVALS *p)
{
       int DatQ15;
	   long Tmp;

        DatQ15 = (RESULT0>>1)&0x7FFF;   		// Convert  result0 to Q15 (unipolar signal)
        Tmp = (long)(p->Ch1Gain*DatQ15); 		//Tmp= gain*dat => Q28 = Q13*Q15  
		p->Ch1Out = (int)(Tmp>>13);				//Convert Q28 to Q15
		
        DatQ15 = (RESULT1>>1)&0x7FFF;   		// Convert  result0 to Q15 (unipolar signal)
        Tmp = (long)(p->Ch2Gain*DatQ15); 		//Tmp= gain*dat => Q28 = Q13*Q15  
		p->Ch2Out = (int)(Tmp>>13);				//Convert Q28 to Q15

        DatQ15 = (RESULT2>>1)&0x7FFF;   		// Convert  result0 to Q15 (unipolar signal)
        Tmp = (long)(p->Ch3Gain*DatQ15); 		//Tmp= gain*dat => Q28 = Q13*Q15  
		p->Ch3Out = (int)(Tmp>>13);				//Convert Q28 to Q15

        DatQ15 = (RESULT3>>1)&0x7FFF;   		// Convert  result0 to Q15 (unipolar signal)
        Tmp = (long)(p->Ch4Gain*DatQ15); 		//Tmp= gain*dat => Q28 = Q13*Q15  
		p->Ch4Out = (int)(Tmp>>13);				//Convert Q28 to Q15
		
        ADCTRL2 |= 0x6000;       	    			// Reset the sequence

}