From POSIX: "If the timeout interval expires without the specified condition being
true for any of the specified file descriptors, the objects pointed to by the readfds,
writefds, and errorfds arguments shall have all bits set to 0."
If your select() timeouts on first loop iteration for any
Hi Juha,
Calling FD_SET(fd, &rset) after timeout solves the problem. Thanks for your
help.
Daniel Pereira de Carvalho
Em sex., 20 de nov. de 2020 às 14:41, Juha Niskanen (Haltian) <
juha.niska...@haltian.com> escreveu:
> From POSIX: "If the timeout interval expires without the specified
> cond
>From POSIX: "If the timeout interval expires without the specified condition
>being true for any of the specified file descriptors, the objects pointed to
>by the readfds, writefds, and errorfds arguments shall have all bits set to 0."
If your select() timeouts on first loop iteration for any r
I will try pool() and see if the problem persists.
Thanks
Daniel Pereira de Carvalho
Em sex., 20 de nov. de 2020 às 14:18, Gregory Nutt
escreveu:
> Okay, I got that wrong. I seldom used select(), it is just an
> additional layer on top of poll() which is much more efficient.
>
> On 11/20/202
Okay, I got that wrong. I seldom used select(), it is just an
additional layer on top of poll() which is much more efficient.
On 11/20/2020 11:13 AM, Daniel Pereira Carvalho wrote:
Hi Greg,
Thanks for the answer. I don't understand why I should use 1 instead of
fs + 1. The documentation says
Hi Greg,
Thanks for the answer. I don't understand why I should use 1 instead of
fs + 1. The documentation says
"nfds This argument should be set to the highest-numbered file descriptor
in any of the three sets, plus 1. "
In the portserial.c nfds was set to fd + 1
Daniel Pereira de Carvalho
E
fd = open("/dev/ttyS1", O_RDWR | O_NOCTTY);
...
s_rc = select(fd + 1, &rset, NULL, NULL, &tv);
The first argument should be 1, not fd + 1
Hi,
I'm trying to read some bytes through the serial port. I am using the
following code
int fd;
int s_rc;
fd_set rset;
uint32_t count;
uint8_t rd_data[16];
struct timeval tv;
fd = open("/dev/ttyS1", O_RDWR | O_NOCTTY);
if (fd == -1)
{
fprintf(stderr, "ERROR: Cannot o
Hello Alan, Gregory,
Thank you for your replies.
Yes. /dev/mtd1 was instantiated via bchdev_register() call.
If I use bchdev_unregister,I noticed that the device is removed from the
list.
Before bchdev_unregister("/dev/mtd1") I call unlink method, but the inode
is not removed because it still ha
