One LED not light up

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

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.

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

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.