[Ovmsdev] max7317 input read

[Michael Balzer]

I'll replicate your test with my module this evening. I did the test on EGPIO_8 routed to the DA26 connector, that worked correctly.

Regards,
Michael


Am 10.07.19 um 11:15 schrieb - -:
> i use the internal Expansion. And there is 3.3v when powered over USB.
> pin 1 3.3v -> pin 18 EGPIO_5
> pin 28 GND -> pin 18 EGPIO_5
>
>> Michael Balzer <dexter at expeedo.de> hat am 10. Juli 2019 um 11:03 geschrieben:
>>
>>
>> * 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
>>>>

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