ESP32 Forum

Posted: **Sat Oct 14, 2017 9:47 am**

Hello

In esp32_out.ld we have:

  /* RTC slow memory (data accessible). Persists over deep sleep.

     Start of RTC slow memory is reserved for ULP co-processor code + data, if enabled.
  */
  rtc_slow_seg(RW) : org = 0x50000000 + 512,
                                     len = 0x1000 - 512

The 512 comes from desired reserve amount.
Now why total len is

Code: Select all

len = 0x1000 - 512

and not ?

Code: Select all

len = 0x2000 - 512

If I understand right, the RTC_SLOW_SEG is 8K not 4K.
Am I missing something?

Thanks

Posted: **Sat Oct 14, 2017 2:13 pm**

I think the higher 4k are reserved for future use by the WiFi driver. In the current versions (latest git), you can modify the size to 8k if you need.

ESP32 Forum

Linker rtc_slow_seg(RW)

Linker rtc_slow_seg(RW)

Re: Linker rtc_slow_seg(RW)