Re: Problem reading and programming memory location...

Sorry, the address is 0x10020000.
I've executed this code:

/* code */
   unsigned char *virt_base;
    u8 regval;
    
    /* map 4kbyte reg. space */
    virt_base = ioremap(0x10020000, 0x1000);
    if (!virt_base) {
        printk("fpga ioremap failed\n");
        return;
    }
    
    regval = in_8(virt_base);
    
    
    printk("reg. value 0x%02x\n", regval);
    printk("reg. value %x\n", virt_base);
/* code */

and i've:

reg. value 0x10
address c90e8000

in U-BOOT in reg. value i've: 0xf8

Thank you so much again…

Lorenzo

On 14/nov/2013, at 10:09 AM, Anatolij Gustschin [off-list ref] wrote:

 u8 regval;

  /* map 4kbyte reg. space */
  virt_base = ioremap(0x10020000, 0x1000);
  if (!virt_base) {
    printk("fpga ioremap failed\n");
    return;
  }

  regval = in_8(virt_base);

  printk("reg. value 0x%02x\n", regval);