Crash when dereferencing pointer

[Daniel Dakhno]

I wrote this function:

uint16_t sequence_read_uint16_t() {
    uint16_t *ptr = (uint16_t *)(sequence_buffer + 1);

    sequence_buffer_read_index += 2;

    return *ptr;
}

When calling it and 

ptr points to something odd, the chip seems to crash. Can you not dereference odd memory addresses?

Or is there a different reason for the crash?

Kind regards,

Daniel

[nRF5xFanboy]

Hi Daniel,

HINT: How big is the size of a memory address?

Best regards,
    nRF5xFanBoy

[Edvin]

Hello,

The pointers need to be word aligned. Try to increment it by +=4 instead of +=2.

Best regards,

Edvin

[Daniel Dakhno]

Would it have been that hard to be useful and give a direct answer?