Messages in this thread | | | Date | Tue, 9 Nov 2010 12:57:27 +0530 | Subject | Doubt about CRTSCTS preprocessor macro definition in termbits.h file | From | Ramya Desai <> |
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Dear All,
I did not understand the CRTSCTS preprocessor macro which is defined in termbits.h file.
http://lxr.linux.no/linux+v2.6.36/include/asm-generic/termbits.h
As per the typedefs defined in the beginning of the file, the c_cflag is unsigned int member in the struct termios structure. The CRTSCTS is defined in the file as a 48 bit value.
#define CRTSCTS 020000000000 /* flow control */
I saw the following snippet in one of the serial applications.
struct termios newtio; newtio.c_cflag = B9600 | CRTSCTS | CS8 | CLOCAL | CREAD;
My question is, the c_cflag is a 32 bit value member and the CRTSCTS is a 48 bit value. How CRTSCTS is accommodates into c_cflag variable? Please let me know, if my interpretation is wrong.
Thanks in advance.
Regards, Ramya.
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