Lab8.c

long rotacoes = 0;
char strLCD[16] = "0";
char read[4]={0,10,13,'\0'};

// LCD module connections
sbit LCD_RS at RE2_bit;
sbit LCD_EN at RE1_bit;
sbit LCD_D0 at RD0_bit;
sbit LCD_D1 at RD1_bit;
sbit LCD_D2 at RD2_bit;
sbit LCD_D3 at RD3_bit;
sbit LCD_D4 at RD4_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D7 at RD7_bit;

sbit LCD_RS_Direction at TRISE2_bit;
sbit LCD_EN_Direction at TRISE1_bit;
sbit LCD_D0_Direction at TRISD0_bit;
sbit LCD_D1_Direction at TRISD1_bit;
sbit LCD_D2_Direction at TRISD2_bit;
sbit LCD_D3_Direction at TRISD3_bit;
sbit LCD_D4_Direction at TRISD4_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D7_Direction at TRISD7_bit;
// End LCD module connections

void interrupt(void) {

    if (INTCON.TMR0IF) {
        TMR0H = 0x85; // 1 segundo
        TMR0L = 0xED;
        LongToStr(rotacoes*60, strLCD);
        rotacoes = 0;
        INTCON.TMR0IF = 0;
    }

    if (PIR1.TMR1IF) {
        rotacoes++;
        TMR1H = 0XFF;
        TMR1L = 0XFF - 8;
        PIR1.TMR1IF = 0;
    }
}

void main() {

    ADCON1 = 0b00001110;

    TRISA = 255;
    TRISC = 255;
    TRISD = 0;
    PORTD = 0;

    Lcd_Init();

    UART1_Init(9600);
    /////// INTERRUPT ////////
    INTCON.GIE = 1; // global interrupt enable
    INTCON.PEIE = 1; // peripheral interrupt enable

    T0CON.T08BIT = 0; // 16 bits
    T0CON.T0CS = 0;
    T0CON.PSA = 0;
    T0CON.T0PS2 = 1; // 100 = 1:32 prescale
    T0CON.T0PS1 = 0;
    T0CON.T0PS0 = 0;
    T0CON.TMR0ON = 1;

    TMR0H = 0x85; // 1 segundo
    TMR0L = 0xED;

    INTCON.TMR0IF = 0; // timer0 overflow flag
    INTCON.TMR0IE = 1; // timer0 enable

    T1CON.RD16 = 0;
    T1CON.T1CKPS1 = 0; // 00 = 1:1 prescale
    T1CON.T1CKPS0 = 0;
    T1CON.TMR1CS = 1; // PORTC.F0 eh o clock
    T1CON.TMR1ON = 1;

    TMR1H = 0XFF;
    TMR1L = 0XFF - 8;

    PIR1.TMR1IF = 0; // timer 1 overflow flag
    PIE1.TMR1IE = 1; // tiemr 1 enable
    
    //////////////////////////////////////////////

    PWM1_Init(20000);
    PWM1_Start();
    UART1_Write_Text("Start");
    UART1_Write(10);
    UART1_Write(13);

    do {
        if (UART1_Data_Ready()) {
            read[0] = UART1_Read();
            strLCD[3] = read;
            switch(read[0])
            {
             case '0':
                  PWM1_Set_Duty(88);
                  read[0] = 'A';
                  break;
             case '1':
                  PWM1_Set_Duty(128);
                  read[0] = 'B';
                  break;
             case '2':
                  PWM1_Set_Duty(224);
                  read[0] = 'C';
                  break;
             case '3':
                  PWM1_Set_Duty(255);
                  read[0] = 'D';
                  break;
             case '4':
                  PWM1_Set_Duty(0);
                  UART1_Write_Text("shut down");
                  read[0] = ' ';
                  break;
            }
            UART1_Write_Text(read);
            //LCD_Out(2, 2, read);
        }

        Lcd_Cmd(_LCD_CURSOR_OFF);
        LCD_Out(1, 1, strLCD);

        delay_ms(100);

    } while(1);

}