[Ovmsdev] max7317 input read

[Michael Balzer]

- Where do you contact EGPIO5?
- Where do you get 3.3V? External +3.3V is only present if you're powering from 12V


Am 10.07.19 um 10:50 schrieb - -:
> I have the egpio5 (port 6) pin on GND.
> then in the shell: egpio input 6.
>
> then the gpio5 (port 6) pin to 3.3V.
> then in the shell: egpio input 6.
>
> both return 0
>
> Regards Thomas
>> Michael Balzer <dexter at expeedo.de> hat am 10. Juli 2019 um 10:40 geschrieben: 
>>  
>>
>> 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
>
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-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26