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read from user port
- From: "Katerina Malatara" <malatara at hotmail dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: Tue, 11 Mar 2003 02:40:56 +0200
- Subject: [ECOS] read from user port
- Bcc:
hi,
i work with a e7t board and i try to read from user port. I have connect the
user port with com2 of my PC.
The PC read some data from a file store them in a buffer and then it send
them through serial port to the board. The board must receive the data and
response by sending some other data.
I use baudrate 38400.
The PC use this function in a loop in order to send all the data in the
buffer
void outbyte(int fd, char c)
{
int n;
n = write(fd, &c, 1);
if (n < 1) {
printf("Error %d: Can't write to serial port\n",n);
return;
}
}
And board use the function
char inbyte(cyg_io_handle_t handle)
{
char temp[1];
Cyg_ErrNo n;
cyg_uint32 len = 1;
n = cyg_io_read(handle, temp, &len);
if(n != ENOERR) {
diag_printf("Error %d: Can't write to serial port\n",n);
exit();
}
return (temp[0]);
}
but receive only the last character.
I can't understand where is the problem.
Please help me.
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