DOUT Vs DIN

MIOS programming (C)
1

Hi

I need just a little help for changing the ain64_din128_dout128_v2_0 apps handling of dout.

I really want to know the right way for changing the din-dout relationship because I have 64 dins but only 4 led because I need to read the state only for 4 dins: But these dins are 20,21,22,23 and I don’t want to plug 3 74hc595 for doin’g this because 1 74hc595 can do this…but I have to assign din 20 to led 1, din 21 to led 2, din 22 to led 3, din 23 to led 4.

How and where can I do this mod?

Thank you very much!

Anakin

2

Hi Anakin,

the relevant section is in main.c

[tt]

/////////////////////////////////////////////////////////////////////////////

//  This function is called by MIOS when a complete MIDI event has been received

/////////////////////////////////////////////////////////////////////////////

void MPROC_NotifyReceivedEvnt(unsigned char evnt0, unsigned char evnt1, unsigned char evnt2) __wparam

{

  // check if note on or off event at channel 1 has been received

  if( evnt0 == 0x80 || evnt0 == 0x90 ) {

    // if note off event: force evnt2 to 0 for easier handling of ‘LED off’

    if( evnt0 == 0x80 )

      evnt2 = 0;

    // number of DOUT pin in evnt1, value in evnt2

    MIOS_DOUT_PinSet(evnt1, evnt2 ? 0x01 : 0x00);

    // notify display handler in DISPLAY_Tick() that DOUT value has changed

    last_dout_pin = evnt1;

    app_flags.DISPLAY_UPDATE_REQ = 1;

  }

}

[/tt]

So, at the moment, the DOUTs are controlled by sending MIDI-Messages.

You have to move the [tt]MIOS_DOUT_PinSet()[/tt] to the DIN-Section and adapt the numbers, e.g. by using a switch case.

[tt]

/////////////////////////////////////////////////////////////////////////////

// This function is called by MIOS when an button has been toggled

// pin_value is 1 when button released, and 0 when button pressed

/////////////////////////////////////////////////////////////////////////////

void DIN_NotifyToggle(unsigned char pin, unsigned char pin_value) __wparam

{

  // a button has been pressed, send Note at channel 1

  MIOS_MIDI_BeginStream();

  MIOS_MIDI_TxBufferPut(0x90); // Note at channel 1

  MIOS_MIDI_TxBufferPut(pin);  // pin number corresponds to note number

  MIOS_MIDI_TxBufferPut(pin_value ? 0x00 : 0x7f); // buttons are high-active

  MIOS_MIDI_EndStream();

  // your switch case here

  // notify display handler in DISPLAY_Tick() that DIN value has changed

  last_din_pin = pin;

  app_flags.DISPLAY_UPDATE_REQ = 1;

}

[/tt]

Regards,

Michael