int
stop
Stop
bits
setting
1, 2
(stop bit = 1 is for data bits = 5,6,7, or 8)
(stop bit = 2 is for data bits = 6,7, or 8)
For details, refer to RS-232 chip set data book
int cmd_type
Received data format setting.
0: single byte mode. The data format is a single byte character.
User
can
use
comm_get_rec_datas
to receive single byte data.
1: command mode. The data format is a string. User can use
comm_get_rec_str
to receive string data.
Return:
Returns a 1 if command succeeds. Returns a 0 if it fails.
comm_send
Syntax:
int comm_send(unsigned char c, unsigned char port)
Function Description:
To send a character to a specified communication port.
Parameter
Description
unsigned char c
Represents character to be sent.
unsigned char port
Specifies communication port to which character is sent (COM1 or
COM2)
1: COM1 port
2: COM2 port
Return:
Returns a 1 if command succeeds. Returns a 0 if it fails.
comm_get_rec_datas
Syntax:
int comm_get_rec_datas(unsigned *length, unsigned char **data, unsigned char port)
Function Description :
The function is called to receive a single byte of data. The function call returns a success flag if the
communication port receives any data. The function call returns a failed flag if the buffer of the
communication port is empty. The length of the data packet received (in bytes) is stored in parameter
"length". The contents of the data packet received are stored in parameter "data".
Parameter
Description
unsigned *length
Returns the length of the received data
unsigned char **data
Returns the received data contents. User must first allocate a
data buffer ( Use
comm_int
function call ). Before exiting program, user
must free this buffer ( Use
comm_exit
function call ).
unsigned char port
Specifies communication port (COM1 or COM2)
1: COM1 port
2: COM2 port
