Need help in interrupt VB6 hardware interface

[kawin]

Does anyone know how to

1. Click on command1 then the motor turns 180 degree back and forward continuously.
2. click on command2 then the motor spin clockwise continuously.
3. Click on command3 to stop.

Thank you in advance for every help.


Here is the code.

#include <16F877.h>
#fuses HS,NOWDT,NOPUT,NOPROTECT
#use delay (clock=20000000)
#use rs232(baud=9600,xmit=pin_c6,rcv=pin_c7)

int step [4]={0x01,0x02,0x04,0x08},i,x;
int steps[4]={0x08,0x04,0x02,0x01},j,y;
int8 send;
#INT_RDA
void RxD_ISR(void)
{
send=getc();
}

void motor_r(void)
{
for(i=0;i<4;i++)
{
output_d(step);
delay_ms(200);
}
}

void motor_l(void)
{
for(j=0;j<4;j++)
{
output_d(steps[j]);
delay_ms(200);
}
}

void main(void)
{
set_tris_d(0x00);
enable_interrupts(GLOBAL);
enable_interrupts(INT_RDA);
while(TRUE);
if(send==0)
{

..................................................................................code vb6...........................

Private Sub Form_Load()
MSComm1.Settings = "9600,N,8,1"
MSComm1.CommPort = 5
MSComm1.InputLen = 1
MSComm1.PortOpen = True
End Sub
Private Sub Command1_Click()
MSComm1.Output = Chr(&H0)
End Sub
Private Sub Command2_Click()
MSComm1.Output = Chr(&HFF)
End Sub
Private Sub Command3_Click()
MSComm1.Output = Chr(&HAA)
End Sub
..................................................

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