PWM control via UART(LAbview)

[Vlad.]

Hey, I design a code to control a dc motor with an h Bridge with pic16f876A and LAbview, i wrote a code but the code doesn't work. I send via serial value from 0 to 255 but the pwm don't start, can somebody help me?

sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;  //conexiune LCD
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;




char dist[] = "000.0";
int i;
unsigned short current_duty1,current_duty2;
void main() {
          UART1_Init(9600);                       // Initialize USART module (8 bit, 38400 baud rate, no parity)
           Delay_ms(300);
         INTCON = 0;           //DEZACTIVARE INTRRUPERI

         TRISA= 0xFF;         //PORTUL A CA INTRARE ANALOG
         TRISB.F0=0;       //CONTROL
         TRISB.F1=0;       //CONTROL
         TRISB.F2=0;       //CONTROL
         TRISB.F3=0;       //CONTROL
         TRISC.F5=0;       //LED
         TRISC.F4=0;      //LED
         TRISC.F3=0;     //BUZZER

         PORTB.F0=0;
         PORTB.F1=0;
         PORTB.F2=0;
         PORTB.F3=0;
         PORTC.F4=0;
         PORTC.F5=0;
         PORTC.F3=0;
         PWM1_Init(10000);
         current_duty1 = 0;
         PWM1_Start();
         PWM1_Set_Duty(current_duty1);
         PWM1_Init(10000);
         current_duty2 = 0;
         PWM2_Start();
         PWM2_Set_Duty(current_duty2);

    while (1) {
    PORTB.F2=1;


       if(UART1_Data_Ready()) //if data ready
   {
     if(UART1_Read() == 0x0D) //check for new line character
     {
       for(i=0;i<5;)
       {
         if(UART1_Data_Ready()) // if data ready
         {

           dist[i] = UART1_Read();  // read data
            current_duty1 = dist[i];
            PWM1_Set_Duty(current_duty1);
           i++;
         }
       }
     }
   }

 

[peterlarky]

Did you check with debugger that you get any data from uart?

 

[jpsganesh]

whether ur labview code works properly? to check that put jumper on Tx and Rx pin of the PC UART. Otherwise give directly from hyperterminal window.