Re: [ts-7000] TS 7200 serial port at full duplex

[Jim Jackson <>]

On Thu, 17 Jan 2013, khouryelie wrote:

> hello i am trying to use my COM2 port on the TS 7200 in RS-485 Full 
> duplex mode
> 
> apparently i have to change the mode register to hex 01 at physical 
> address 0x22C0_0000

I think you need to do a byte write - otherwise you are writing
hex 00 to 0x22C0_0000 0x22C0_0001 0x22C0_0002 and hex 01 to 0x22C0_0002
when you write the integer hex 01 to 0x22C0_0000

Just try changing Made to unsigned char *

Don't why you have the infinite loop!

> 
> 
> _______________________________________________
> the first is the code i tried to make
> 
> the second is provided within the Manuel 
> 
> can som1 point out my problem and why is it not working ?
> 
> ______________________________________________
> #include<unistd.h>
> #include<sys/types.h>
> #include<sys/mman.h>
> #include<stdio.h>
> #include<fcntl.h>
> #include<assert.h>
> 
> int main(void)
> {
>       int fd,v;
>       volatile unsigned int *Mode,*check;
> 
>       assert(fd != -1);
> 
>       fd = open("/dev/mem", O_RDWR | O_SYNC);
> 
>       Mode = (unsigned int 
> *)mmap(0,getpagesize(),PROT_READ|PROT_WRITE,MAP_SHARED,fd,0x22C00000);
> 
>       *Mode = 0x01;
> 
>       while(1)
>       {
>               *Mode = 0x01;
>               sleep(5);
>       }
> 
>       check = (unsigned int 
> *)mmap(0,getpagesize(),PROT_READ|PROT_WRITE,MAP_SHARED,fd,0x22C00000);
>       printf("%p\n",check);
> 
> 
> }
> 
> 
> ________________________________________________
> 
> 
> 
> #include <linux/ts_sbc.h>
> #include <linux/include/asm/ioctls.h>
> #define TIOC_SBCC485 _IOW('T',0x70,int) /*TS RTS/485 mode Clear*/
> #define TIOC_SBCS485 _IOW('T',0x71, int) /*TS RTS/485 mode Set */
> #define AUTO485FD 1
> #define RTSMODE 2
> #define AUTO485HD 4
> mcr = AUTO485FD;
> //mcr = AUTO485HD; //for half duplex
> ioctl (fd, TIOC_SBCS485, &mcr);
> //write() and read() from fd
> ioctl (fd, TIOC_SBCC485, &mcr);
> //further reads() and writes() may not behave
> 
> 
> 
> 


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