Hi,
On Mon, Jan 11, 2010 at 5:08 PM, Alessio Margan @ IIT
<alessio.mar...@iit.it> wrote:
> Hi,
>
> I try to configure sensoray counters to generate PWM signal
>
> #define SUBD_CNT 0
> #define SUBD_AI 1
> #define SUBD_AO 2
> #define SUBD_DIO 3
>
> insn.type = A4L_INSN_CONFIG;
> insn.idx_subd = SUBD_COUNTER;
> insn.chan_desc = CHAN(channel);
> insn.data_size = sizeof(dataC) / sizeof(dataC[0]);
> insn.data = data;
> data[0] = A4L_INSN_CONFIG_GPCT_PULSE_TRAIN_GENERATOR;
> data[1] = cmReg.value;
> data[2] = down_ticks;
> data[3] = up_ticks;
>
> ret = a4l_snd_insn(&dsc, &insn);
>
> in a4l_do_insn the subdevice is check in this way but the test for
> counter, and I think also for dio, fails due
> to A4L_SUBD_MASK_SPECIAL bit
>
> #define A4L_SUBD_UNUSED (A4L_SUBD_MASK_SPECIAL|0x1)
> #define A4L_SUBD_COUNTER (A4L_SUBD_MASK_SPECIAL|0x40)
> #define A4L_SUBD_DIO (A4L_SUBD_MASK_SPECIAL|0x20)
>
> /* Checks the subdevice's characteristics */
> if ((subd->flags & A4L_SUBD_UNUSED) != 0) {
> __a4l_err("a4l_do_insn: wrong subdevice selected 0x%X\n",subd->flags);
> return -EINVAL;
> }
>
> there is something wrong or I miss something ?
You miss nothing. There was a bug in the subdevice's flags checking line:
The problem is here: if ((subd->flags & A4L_SUBD_UNUSED) != 0) {
I fixed it in my git repo one week ago.
Either you clone my git repot or you wait for the pull request I will
make tonight.
Regards,
>
> TIA
>
> Alessio
>
>
> --
>
> ISTITUTO ITALIANO
> DI TECNOLOGIA
>
> Alessio Margan
> /Senior Technician/
> mail me <mailto:alessio.mar...@iit.it>
>
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Alexis.
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