Embedded System Applications Program: #include <xc.h> void main (void) { TRISC2 = 0; //configure CCP1 pin an output PR2 = 249; T2CON = 0b00000001; //Timer2, 4 prescale, no postscaler CCP1CON=0b00001100; //PWM mode, DC1B1=0, DC1B0=0 TMR2=0; //clear Timer2 TMR2ON=1; //turn on Timer2 while(1) { CCPR1L=250 delay_ms(1000); CCPR1L=125 delay_ms(1000); }
//100% duty cycle //delay 1s //50% duty cycle //delay 1s
}
7.7 DC Motor
A DC motor is a rotary electrical machine used to convert electrical energy into mechanical energy. In the DC motor we have only + and β leads. Connecting them to a DC voltage source moves the motor in one direction. By reversing the polarity, the DC will move in the opposite direction. See Figure 7.10. An H Bridge could be used to this end.
Figure 7.10: DC Motor (https://electrosome.com)
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