[Ovmsdev] max7317 input read

Michael Balzer dexter at expeedo.de
Wed Jul 10 02:00:57 HKT 2019


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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Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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