[Ovmsdev] max7317 input read

[Michael Balzer]

Then you're now doing something wrong. Please describe your test setup.

Regards,
Michael


Am 10.07.19 um 10:35 schrieb - -:
>
> Hi,
>
> i have test it, but it seems not to work.
> it return always 0 when i put the egpio to GND or 3.3v
>
>> Michael Balzer <dexter at expeedo.de> hat am 9. Juli 2019 um 22:58 geschrieben:
>>
>> I did some tests myself, it turned out there was more to do here.
>>
>> First, the max7317 really needs 16 bits for every command. Second, the reads were done on the output level registers, inputs are mapped to
>> bit fields in 0x0e & 0x0f. Third, the max7317 needs a deselect between the tx and the rx. No, really, I've tried even half duplex mode, the
>> deselect really is necessary.
>>
>> Fix is pushed. I've also added an "egpio input" shell command.
>>
>> Regards,
>> Michael
>>
>>
>> Am 09.07.19 um 20:00 schrieb Michael Balzer:
>>> Thomas,
>>>
>>> there may be a bug in the max7317 component:
>>>
>>>     uint8_t max7317::Input(uint8_t port)
>>>     …
>>>       uint8_t* p = m_spibus->spi_cmd(m_spi, buf, 1, 1, port + 0x80);
>>>
>>> According to the max7317 specsheet the read operation needs a second (dummy) byte. So this should be…
>>>
>>>       uint8_t* p = m_spibus->spi_cmd(m_spi, buf, 1, 2, port + 0x80, 0);
>>>
>>> Please try & report.
>>>
>>> Regards,
>>> Michael
>>>
>>>
>>> Am 09.07.19 um 13:10 schrieb - -:
>>>>
>>>> Hello,
>>>>
>>>> How can I read inputs from max7317.
>>>> when I try to log ESP_LOGD(TAG,"EGPIO5 input: %d", MyPeripherals->m_max7317->Input(MAX7317_EGPIO_5));
>>>>
>>>> i get allways 0 when i put the egpio pin to GND or 3.3v
>>>> do i somthing wrong or does it not work.
>>>>
>>>> Regards Thomas
>>>>
>>>>


-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openvehicles.com/pipermail/ovmsdev/attachments/20190710/2d4d2159/attachment.html>