How Can I Make Safe Shutdown Via Rs232

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hi
i connect button to the microcontroller board which is connected to pc via rs232 i want when this button release the pc will safe shuttdow through cmd command shutdown any help please

many thanks

Posted 19-Sep-14 6:49am

Adham 1987

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Adham 1987 19-Sep-14 15:16pm

THE CODE FOR MICROCONTROLLER:

#include <18F2620.h>
#device adc=16
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES H4 //High speed osc with HW enabled 4X PLL
#FUSES NOBROWNOUT //No brownout reset
#FUSES LVP //Low voltage prgming
#FUSES NOXINST //Extended mode disabled (Legacy mode)
#use delay(clock=40000000)
#use rs232(baud=57600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
void main()
{
int value = 1;
TRISA = 1; //Set PORTA as input
do
{
if(PORTA.RA0 != 1) //if button is not pressed

{

printf("%d", value); /* send formatted string via RS232 */

}
}while(1);

}

THIS CODE MUST SEND 1 TO THE PC WHAT I NEED IS A SIMPLE CODE WHICH RECEIVED THIS DATA (1) AND TURN PC OFF WHILE RELEASING THE BUTTON BUT FIRST OF ALL IS THE MICROCONTROLLER CODE IS CORRECT

MANY THANKS

Adham 1987 19-Sep-14 16:43pm

AND PC LISTENING WITH CODE:

#include <bios.h>
#include <conio.h>
#define COM1 0
#define DATA_READY 0x100
#define SETTINGS ( 0x80 | 0x02 | 0x00 | 0x00)
int main(void)
{
int in, out, status;
bioscom(0, SETTINGS, COM1); /*initialize the port*/
cprintf("Data sent to you: ");
while (1)
{
status = bioscom(3, 0, COM1); /*wait until get a data*/
if (status & DATA_READY)
if ((out = bioscom(2, 0, COM1) & 0x7F) == 0) /*if no input data*/
system("C:\\WINDOWS\\System32\\shutdown -s");

}
return 0;
}

PLEASE ANY HELP ALL I NEED IS A CHECKUP

MANY THANKS

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CPallini · Answer 1 · 2014-09-19T07:03:00

Solution 1

Once the microcontroller detects the button press, it can send a 'shutdown' message to the your application running on the PC. The application, in turn, can shutdown Windows calling InitiateSystemShutdownEx[^] (please see the Remarks section)

Posted 19-Sep-14 7:03am

CPallini