One LED not light up

[rajaafiq]

hi all,
i trying to make a running light LED on dsPIC33FJ64MC802 and this is my code

void main (void){
    TRISA=0x0000; //portA as output
    unsigned int data;
    unsigned int n;
    unsigned int m;
    while (1){
         data=0x01;
        for(n=0;n<5;n++){  //make a loop for led to on
            LATA=data;    //to confugure which led to on
            data=data<<1;  //change the value in data
            delay1s();      
        }
        data=0x10;          //Change value in data to make led light on backwork
        for(m=0;m<5;m++){    //make a loop for led to on
            LATA=data;     //to confugure which led to on
            data=data>>1;   //change the value in data
            delay1s();        
        }
    }
}

my question is, why my LED 4 not light up while other run as what i want.

[Ioannis]

1. This is a PicBasic Forum and not C.
2. The above compiler does not support 24 or 32 series PICs.
3. Maybe your PortA is input only, so check your PICs datasheet.

Ioannis

[aratti]

Very likely porta for led 4 is an open collector port. In such a case, you just need to change the way the led is connected.
(Check the data sheet for confirmation)

Cheers

Al.