On 10/04/2011 03:06 PM, Julien Delange wrote:
> void polling_task(void * arg)
> {
> int i;
> double tmp;
> int ret;
> uint8_t raw[128 * 16];
> double rate = 0.0001;
Your "rate" looks more like a period to me (that is, the reciprocal).
The corresponding rate would be 10000.
> int result;
> unsigned long missed;
> a4l_insn_t insn_tab[16];
> a4l_insnlst_t insnlst;
>
>
> insnlst.count = 16;
> insnlst.insns = insn_tab;
>
> for (i=0; i<16; i++)
> {
> insn_tab[i].type = A4L_INSN_READ;
> insn_tab[i].idx_subd = 0;
> insn_tab[i].chan_desc = chdesc[i];
> insn_tab[i].data_size = 8;
> insn_tab[i].data = &raw[128 * i];
> }
> rt_task_set_periodic(NULL, TM_NOW, rate * 1000000000.0);
1000000000.0 * 0.0001 is 100000, that is 100us, not 1ms. As of why you
get 2ms (or 200us, maybe ?) is still a mystery. Could you send us your
kernel configuration?
Are not the analogy calls blocking?
--
Gilles.
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