AN2388 datasheet(33/54 Pages) STMICROELECTRONICS

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AN2388

Software design

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Figure 30.

Time diagram

Initialization routine

************************************************************************************

**************************INIT ROUTINE*

************************************************************************************

*************************

void Configure_PWM(void)// PWM module configuration

{

Set Direction Port PWM CHANNEL 1,2,3 : Outputs

Set PWM MODE : CENTER ALIGNED MODE

Set PWM FREQUENCY ;//16 kHz @ 64MHz

Enable PWM INTERRUPT

Enable Channels;

}

void Configure_ADC(void)// Configure AD module

{

Set AD Conversion Mode: Single Conversion;

Set Channel : channel1, channel2 ;

}

void Configure_Encoder(void)

{

Configure Timer T3: Timer for encoder reading sets for any transition counting

Enable Timer;

}

void Configure_TIMERS(void)

{

T01CON = 0x0206 ; // Timer 1 enabled, T1M=0(Timer Mode) T1I=011 --//>prescaler=32

,Tres=0.5uS with 64MHz

// Timer 0 enabled, T1M=0(Timer Mode) T1I=111 -->prescaler=1024 //

Tres=16uS with 64MHz

T1IC=0x0007 // T1 interrupt priority levelxxx , group level x

T1IE = 1

// Enable interrupts

T1 = 0

;

// T1 starts from 0

T1R = 1;

//Timer 1 for speed sensing

T0IC=0x0009 // T1 interrupt priority levelxxx , group level x

T0IE = 1

// Enable interrupts

T0 = 0

// T1 starts from 0

T0R = 1;

//Timer 1 for speed sensing

}

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