[Ovmsdev] max7317 input read

[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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