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Microsoft® Visual C++® (Ver.6.0) programming example
#include <stdio.h>
#include <windows.h>
void main(void){
HANDLE
hCom;
DCB
hDcb;
COMMTIMEOUTS
char
szTx[0x10];
char
szRx[0x10];
char
szCommand[0x10];// Command
int
nTx,nRx;
int
nSum;
BOOL
bRet;
int
nRet;
int
i;
// ****
Open COM1 port
****
hCom = CreateFile("COM1", (GENERIC_READ | GENERIC_WRITE), 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if(hCom != NULL) {
//
Set COM1 port communication
****
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if(bRet == TRUE) {
//
Set COM1 port timeout
****
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hTim.ReadTotalTimeoutConstantSetCommTimeouts(hCom,&hTim);// Setting of changed timeout values
//
Setting of command for switching the station number 1 inverter to the Network operation mode
****
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//
Generate sum code
****
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for(i = 0;i < nTx;i++) {
}
//
Generate send data
****
memset(szTx,0,sizeof(szTx));
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sprintf(szTx,"\5%s%02X",szCommand,nSum);// ENQ code + send data + sum code
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nRet = WriteFile(hCom,szTx,nTx,&nTx,NULL);
//
Send
****
if(nRet != 0) {
//
Receive
****
}
}
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}
}
// Communication handle
// Structure for setting communication settings
hTim;
// Structure for setting timeouts
// Send buffer
// Receive buffer
// For storing buffer size
// For calculating sum code
****
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****
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+
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****
nRet = ReadFile(hCom,szRx,sizeof(szRx),&nRx,NULL);
****
if(nRet != 0) {
//
Display receive data
****
for(i = 0;i < nRx;i++) {
printf("%02X ",(BYTE)szRx[i]);// Output received data to console
// Display ASCII code in Hexadecimal' In case of 0', "30" is displayed.
}
printf("\n\r");
}
m
; )
/ /
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t S
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/ /
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b
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e
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d
d
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a t
(
N
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T
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n
d
d
a
a t
s
z i
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n I
t i
a i
z i l
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s
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m
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/ /
C
a
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s
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M
a
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a
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// Initialize send buffer
/ /
Initialize receive buffer
/ /
E
N
Q
c
o
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e
+
n
u
m
****
/ /
C
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c i
t a
5.11 (N) Communication operation parameters
u
n
c i
t a
o i
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i
f n
r o
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t a
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n i
g
p
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d
=
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b
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s t i
e
n
n
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m
u
n
c i
t a
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n
i
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t a
o i
n
t u
v
a
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e
s
e
c
o
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d
e
c
o
n
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****
o
p
r e
t a
o i
n
w
t i r
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d
e
b
r e
f o
s
e
n
d
d
a
a t
+
n
u
m
b
r e
f o
s
u
m
c
o
o i
n
p
o
t r
5. PARAMETERS
2
2
3
4
5
6
7
8
9
10
d
e
s
177
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