DOUT trouble

Testing/Troubleshooting
1

On some pins of 74hc595 measured +5V after power-on. But there are must be 0V.

I have insert this code to application source

void Init(void) __wparam
{
unsigned char i;
  // 
...
for(i=0;i<128;++i) {
   MIOS_DOUT_PinSet0(i);  // Set ALL DOUT pin to 0
  }

}

...

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);
  } 

  if (evnt0 == 0x90 && evnt1 == 0x40 && evnt2 == 0x01) {
    for(i=0;i<128;++i) {
     MIOS_MIDI_TxBufferPut(0x90); // Send to PC DOUT pin state
     MIOS_MIDI_TxBufferPut(i);  //
     MIOS_MIDI_TxBufferPut(MIOS_DOUT_PinGet(i)); // 
  }
}

and after send “90 40 01” to device i get this

90 00 00
90 01 00
90 02 00
...
90 40 01
...
90 7F 00

If I send any 90 xx 01 - on DOUT pins nothing is change.

DOUT module tested for bad soldering - all elements soldered good.

2

You forgot to initialize the SRIO driver, see also the Init() function of this example:

http://www.ucapps.de/mios_c_set_dout.html

Best Regards, Thorsten.

3

I have this code in Init Function:

MIOS_SRIO_UpdateFrqSet(1); // ms
MIOS_SRIO_NumberSet(16);
4

I upload “midibox64” application to core, and nothing changed.

May be 74HC595 are broken. But all 8 pieces?

May be truble in PIC? How can I test PIC on working capacity?

All MIDI events go from PC to CORE and come back (if I write necessary addition to MPROC_NotifyReceivedEvnt function).

I dont know to do…

5

I have upload “srio_interconnection_test_v1b” and check the interconnections to the DIN and DOUT module with a multimeter.

The Pins are mapped to following Modulation Wheel Values:

  # 0: Pin CORE::J8:DO and DOUT::J1:DO = ca. 5V - OK!

  # 1: Pin CORE::J8:SC, CORE::J9:SC, DOUT::J1:SC, DIN::J1:SC = ca. 5V - FAIL!  (measured only 0.72V (on pin #22 of PIC too))

  # 2: Pin CORE::J8:RC, CORE::J9:RC, DOUT::J1:RC, DIN::J1:RC = ca. 5V - OK!

Is It a PIC problem? How to solve this problem?

6

trouble with PIC pin #22 solved (short circuit with another pin)

but DOUT module still not work properly.

7

I don’t know what happen? but it WORK!! :slight_smile:

8

Yay :smiley: