[Ovmsdev] max7317 input read

Michael Balzer dexter at expeedo.de
Thu Jul 11 03:39:19 HKT 2019


I've tried all ports now, all work as expected.

Did you try other ports? Maybe your P6 is defective?

Regards,
Michael


Am 10.07.19 um 12:21 schrieb Thomas Heuer:
> here a picture with 3.3v to egpio5
>> Michael Balzer <dexter at expeedo.de> hat am 10. Juli 2019 um 12:08 geschrieben:
>>
>>
>> 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
>> -- 
>> 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

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