[ts-7000] 7250: MAX197 A/D present

["overclocker_mmu" <>]

Hi,

I've found this code online, trim it just to try the MAX197 present checking.

#include <fcntl.h>
#include <assert.h>
#include <unistd.h>
#include<sys/mman.h>
#include<sys/types.h>
#include<unistd.h>
#include<stdio.h>
#include <stdlib.h>


int main(void)
{

    volatile unsigned short *complete, *data;
    volatile unsigned char *control;
    volatile unsigned char *present;

  int fd = open("/dev/mem", O_RDWR | O_SYNC);
  if (fd <= 0)
    {
      printf("Unable to open /dev/mem\n");
      exit(1);
    }
  present = (unsigned char *)mmap(0, 
                  4096, 
                  PROT_READ|PROT_WRITE, 
                  MAP_SHARED, 
                  fd, 
                  0x22400000);

  if (present == (unsigned char *)-1)
    {
      printf("Unable to mmap the A/D presence register\n");
      exit(1);
    }

  if ((*present & 1) == 0)
    {
      printf("MAX197 A/D converter not present in TS-7250\n");
      exit(1);
    }

  control = (unsigned char *)mmap(0, 
                  4096, 
                  PROT_READ|PROT_WRITE, 
                  MAP_SHARED, 
                  fd, 
                  0x10f00000);
  if (control == (unsigned char *)-1)
    {
      printf("Unable to mmap the A/D control register\n");
      exit(1);
    }

  data = "" short *)control;

  complete = (unsigned short *)mmap(0, 
                    4096, 
                    PROT_READ|PROT_WRITE, 
                    MAP_SHARED, 
                    fd, 
                    0x10800000);
  if (complete == (unsigned short *)-1)
    {
      printf("Unable to mmap the A/D 'complete' register\n");
      exit(1);
    }
  close(fd);
  
  return 0;
}


I compile this code by issuing this :

 arm-unknown-linux-gnu-gcc -Wall -o max197present max197present.c -mcpu=arm9


Then I  copy the binary to the board via ftp. I ran the binary and nothing happened. I am expecting "MAX197 A/D converter not present in TS-7250" to appear since I have uninstalled the MAX197 chip.

The board is unmodifed running TS-Linux/arm 7.0

Where did I do wrong?

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