83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/*
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* Copyright (C)2019 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <windows.h>
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#include <stdio.h>
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#define SOS_REQ "shutdown"
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#define UOS_ACK "acked"
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#define BUFF_SIZE 16U
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#define MSG_SIZE 8U
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HANDLE initCom(const char *szStr)
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{
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HANDLE hCom = CreateFile(szStr,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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0,
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NULL);
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if (hCom == INVALID_HANDLE_VALUE)
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{
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printf("open %s failed!\n", szStr);
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return hCom;
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}
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printf("open %s successed!\n", szStr);
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SetupComm(hCom, 1024, 1024);
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COMMTIMEOUTS TimeOuts;
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TimeOuts.ReadIntervalTimeout = 100; /* Maximum time between read chars. */
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TimeOuts.ReadTotalTimeoutMultiplier = 5000; /* Multiplier of characters. */
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TimeOuts.ReadTotalTimeoutConstant = 5000; /* Constant in milliseconds. */
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TimeOuts.WriteTotalTimeoutMultiplier = 500; /* Multiplier of characters. */
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TimeOuts.WriteTotalTimeoutConstant = 2000; /* Constant in milliseconds. */
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SetCommTimeouts(hCom, &TimeOuts);
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DCB dcb;
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GetCommState(hCom, &dcb);
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dcb.BaudRate = 115200;
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dcb.ByteSize = 8;
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dcb.Parity = NOPARITY;
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dcb.StopBits = ONESTOPBIT;
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SetCommState(hCom, &dcb);
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return hCom;
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}
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int main()
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{
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DWORD recvsize = 0;
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char recvbuf[BUFF_SIZE];
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HANDLE hCom = initCom("COM2");
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if (hCom == INVALID_HANDLE_VALUE)
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{
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return -1;
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}
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do {
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memset(recvbuf, 0, sizeof(recvbuf));
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ReadFile(hCom, recvbuf, sizeof(recvbuf), &recvsize, NULL);
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if (recvsize < MSG_SIZE)
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{
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continue;
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}
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if (strncmp(recvbuf, SOS_REQ, MSG_SIZE) == 0)
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{
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WriteFile(hCom, UOS_ACK, sizeof(UOS_ACK), NULL, NULL);
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system("shutdown -s -t 0");
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break;
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}
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} while (1);
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return 0;
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}
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