Hello everybody!!
I have comunication problems with rt_com, My linux program writes in a
fifo, and
the module, read the fifo and sends with rt_com_write, but in the other
linux PC, with
miniterm appear nothing.
If I use miniterm in the two computers then is all Ok,
In a Readme in rt_com coments is necesary do: setserial /dev/ttyS1 uart
none,
If i do this, then miniterm doesn't work.
I execute setserial /dev/ttyS1 uart none, before load rt_com module, i
check the fifo is Ok.
What is happing?
Can anyboy help me!
Thanks in advance!
------------------------------------------------------------
The rt_com_table in rt_com.c is:
#define RT_COM_CNT 0
struct rt_com_struct rt_com_table[ RT_COM_CNT ] =
{
{ 0, BASE_BAUD, 0x2f8, 3, STD_COM_FLAG, rt_com0_isr },
};
the results of setserial /dev/ttyS1 (before setserial /dev/ttyS1 uart
none) are:
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
------------------------------------------------------------
The code of my module is :
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <rtl_conf.h>
#include <rtl_core.h>
#include <rtl_sync.h>
#include <rtl_fifo.h>
#include <rt_com.h>
static int _fifo_read = 1; /* default fifo used to read is 1 */
static int _port = 0;
int read_handler(unsigned int fifo)
{
char c;
int err;
err=rtf_get(_fifo_read,&c,1);
if (err<0)
{
printk("read_handler: rtf_get error %d\n",err);
}
rt_com_write(_port,&c,1);
return 0;
}
/* -------------------------------------------------- */
/* - init_module - */
/* -------------------------------------------------- */
int init_module( void )
{
int fifo_r;
int err;
if( (fifo_r = rtf_create(_fifo_read,1000) ) <0)
{
printk("head: Error al crear la FIFO read, error: %d\n",fifo_r);
return -1;
}
/* when there is something in the fifo read, the read_handler is
executed*/
if ( (err=rtf_create_handler(_fifo_read, &read_handler))<0)
{
rtf_destroy(_fifo_read);
printk("head: Error al crear el handler, error: %d\n",err);
return -1;
}
/* configure /dev/ttyS1 port*/
rt_com_setup(_port, 38400, RT_COM_PARITY_NONE, 1, 8);
printk("head: Module head is loaded\n");
return(0);
}
/* -------------------------------------------------- */
/* - cleanup_module - */
/* -------------------------------------------------- */
void cleanup_module( void )
{
rtf_destroy(_fifo_read);
}
--------------------------------------------------
And the linux program:
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main()
{
int fd1;
unsigned char letra='1';
int err;
fd1=open("/dev/rtf1",O_WRONLY);
if (fd1!=0)
{
while(letra != '0')
{
printf("Write a char: (exit with: '0'):\n");
letra=getchar();
if((err=write(fd1,&letra,1))!=1)
{
// error
printf("Error, %d\n",err);
}
}
}
return(0);
}
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