Hi Hiep,
On Mon, Feb 13, 2017 at 7:50 AM, Hiep Cao Minh <cm-hiep@xxxxxxxxxxx> wrote:
> Sorry to bother you!
No, thank you for finally make me see my wrong reasoning!
>> qspi_transfer_in() does:
>>
>> while (n > 0) {
>> len = qspi_set_receive_trigger(rspi, n);
>> // len will be <= n
>
> I agree. This is len = min value of n and 32.
>>
>> if (len == QSPI_BUFFER_SIZE) {
>> // receive blocks of len bytes
>
> Yes, This is len == 32 bytes
>>
>> ...
>> } else {
>> // receive n (not len) bytes
>
> This is always n == len ( This case, len or n is always < 32)
> Because this is the last n bytes should be received.
Right.
Doh, I must have missed that if "len < n", the first branch is always taken.
>> ret = rspi_pio_transfer(rspi, NULL, rx, n);
It would have been clearer to use "len" here instead of "n".
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
