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FM SDK Programming Guide > HSM Functions Reference > Serial Communication functions > SERIAL_SetControlLines
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This function is used to modify the control lines (DTR/RTS).
int SERIAL_SetControlLines( int port,
unsigned char bitmap,
int op);
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Parameter |
Description |
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port
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Serial port number (0 based). Specify port 0 to redirect the output to the hsmtrace log. |
bitmap
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Bitmap of control lines to be modified. Input control lines are silently ignored. |
op
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One of MCL_OP_SET/MCL_OP_CLEAR to set/clear the control lines specified in the bitmap parameter |
0: The function succeeded
-1: The function failed
The same constants used in SERIAL_GetControlLines() function are also used in this function.