On 08/09/14 01:18, Erik Christiansen wrote:
Thanks for the reply. Interesting.
I think the solution I will use is to put the buffer between __bss_end
and the stack.
Initializing in C:
extern unsigned int __bss_end;
...
buffer_base = (uint8_t *)(__bss_end & 0xff80) + 0x80
buf_head_ptr = spi_
On 09.08.14 18:18, Erik Christiansen wrote:
>
>ldiw Z,buf
What, that's not an avr mnemonic? It is if you have this in a header
file:
; Data Pointer (or any word value) initialisation of a register pair.
; Usage: ldiw Y,some_data
;ldr16,Y ; OR lpm r16,Y if some_data is
On 08.08.14 12:43, Thomas D. Dean wrote:
> I have a 256 byte buffer that is accessed with two pointers, head and tail.
>
> In the AS code, I want to only save the low order byte of the pointer. This
> is do-able, if the buffer is aligned at 0x0100.
At the cost of 2-byte arithmetic in the queue an
