Hi all midiboxer) Need your help!
I built blm 16x16+X on PCBs.
CS consists of two printed circuit boards: the first contains 16+Xx8, 2 scalar modules are installed under it, the second 16+Xx8+X contains 3 SCALAR modules
The device connects to midibox seq v4 normally on port IN3
Firmware PIC4620 blm_scalar_v1_1,
Power from 5V 3A power supply
Test of the first section 16x4 with SCALAR module -ok
The next section test is 16x8 with two SCALAR modules -ok
Test of the next section 16x12 with three SCALAR modules - all the LEDs blink, the buttons transmit the midi event to the midi monitor if you click
Section test 16x16 + extra - the device goes crazy, all the LEDs are lit randomly, the buttons transmit the midi event to the midi monitor
All the same if you change the scalar modules in any configurations, the same if you connect the modules arbitrarily on the board i.e. e.g. starting at line 5, etc.)
Those. Errors on the PCB seem to be eliminated, on the scalar, it seems, too. Remains Core (voltage drop in the last scenario to 4.9V)
Connection length between SCALAR modules about 100mm
jumpers on Core J5 are not installed as stated in the description of the firmware project_without_ain.hex (the same result with jamper)
Has anyone come across? Please tell me where to look?
Modules are installed under CS and connected by a ribbon cable about 10 cm