[BSP]업무일지 - 20100719

오전 ATmega

self boot loader-
DK128에 cmd를 이용하여 loader 시키는 방법.


통신 -
PC에서 가상 포트를 설정하여 통신 (com2 -com3)
단방향 통신 - cmd => 하이퍼 터미널
-
Port com2 --> com3
하이퍼터미널로 문자가 찍히게 된다.

#include <stdio.h>
#include <windows.h>

int main(void)
{
 char szPort[15];
 wsprintf(szPort, "COM%d", 3);
 
 HANDLE m_hComm = NULL;
 m_hComm = CreateFile(szPort, GENERIC_READ |
         GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
         FILE_ATTRIBUTE_NORMAL, NULL);
 if(m_hComm == INVALID_HANDLE_VALUE)
 {
  printf("(!) Failed to create a comm Device file");
  return FALSE;
 }

 DCB dcb;
 dcb.DCBlength = sizeof(DCB);
 
 GetCommState(m_hComm, &dcb);

 dcb.BaudRate = 9600;
 dcb.ByteSize = 8;
 dcb.Parity = 0;
 dcb.StopBits = 0;

 SetCommState(m_hComm, &dcb);
 OVERLAPPED osWrite;
 osWrite.Offset = 0;
 osWrite.OffsetHigh = 0;
 osWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 
 char buf[100] = "안뇽 까꿍\r\n";
 while(1)
 {
  printf("send : %s", buf);
  WriteFile(m_hComm, buf, strlen(buf), NULL, &osWrite);
  Sleep(1000);
 }
 CloseHandle(m_hComm);
 return 0;
}

-양방향통신과 단방향통신-

6장 윈도우기반 직렬통신 프로그래밍.ppt

위는 단방향 통신 예제와 양방향 통신 PPT 이다.
설명하기가 조금 애매 해서 위의자료를 참고 해야한다.

양방향 주고받기통신 소스(먼저받는부분)

#include <stdio.h>
#include <windows.h>

int main(void)
{
 char szPort[15];
 wsprintf(szPort, "COM%d", 3);
 
 HANDLE m_hComm = NULL;
 m_hComm = CreateFile(szPort, GENERIC_READ |
         GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
         FILE_ATTRIBUTE_NORMAL, NULL);
 if(m_hComm == INVALID_HANDLE_VALUE)
 {
  printf("(!) Failed to create a comm Device file");
  return FALSE;
 }

 DCB dcb;
 dcb.DCBlength = sizeof(DCB);
 
 GetCommState(m_hComm, &dcb);

 dcb.BaudRate = 9600;
 dcb.ByteSize = 8;
 dcb.Parity = 0;
 dcb.StopBits = 0;

 SetCommState(m_hComm, &dcb);
 OVERLAPPED osWrite;
 osWrite.Offset = 0;
 osWrite.OffsetHigh = 0;
 osWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

 OVERLAPPED osRead;
 osRead.Offset = 0;
 osRead.OffsetHigh = 0;
 osRead.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 
 char buf[100] = "안뇽까꿍\r\n";
 char buf1[100];
 while(1)
 {
  ReadFile(m_hComm, buf1, 100, NULL, &osRead);
  printf("recv1 : %s", buf1);
  
  WriteFile(m_hComm, buf, strlen(buf)+1, NULL, &osWrite);
  printf("send1 : %s", buf);

  Sleep(2000);
 }
 CloseHandle(m_hComm);
 return 0;
}

양방향 주고받기통신 소스(먼저보내는부분)

#include <stdio.h>
#include <windows.h>

int main(void)
{
 char szPort[15];
 wsprintf(szPort, "COM%d", 2);
 
 HANDLE m_hComm = NULL;
 m_hComm = CreateFile(szPort, GENERIC_READ |
         GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
         FILE_ATTRIBUTE_NORMAL, NULL);
 if(m_hComm == INVALID_HANDLE_VALUE)
 {
  printf("(!) Failed to create a comm Device file");
  return FALSE;
 }

 DCB dcb;
 dcb.DCBlength = sizeof(DCB);
 
 GetCommState(m_hComm, &dcb);

 dcb.BaudRate = 9600;
 dcb.ByteSize = 8;
 dcb.Parity = 0;
 dcb.StopBits = 0;

 SetCommState(m_hComm, &dcb);
 OVERLAPPED osWrite;
 osWrite.Offset = 0;
 osWrite.OffsetHigh = 0;
 osWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

 OVERLAPPED osRead;
 osRead.Offset = 0;
 osRead.OffsetHigh = 0;
 osRead.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 
 char buf[100] = "안뇽\r\n";
 char buf1[100];
 while(1)
 {
 
  WriteFile(m_hComm, buf, strlen(buf)+1, NULL, &osWrite);
  printf("send2 : %s", buf);
  
  ReadFile(m_hComm, buf1, 100, NULL, &osRead);
  printf("recv2 : %s", buf1);

  Sleep(2000);
 }
 CloseHandle(m_hComm);
 return 0;
}