Hi I am building a sampler box and I am very excited about it.
It's awesome and thank you for everyone involved into it.
the first build I did works fine either with USB audio and with HDMI Audio so all good from this point of view.
I also added buttons which work fine to change presets
Now I am trying to add a screen LCD and I got the HD44780 1602 and soldered by this by the standard of http://www.nickyspride.nl/sb2/ (see picture below)
Then I noticed that http://homspace.xs4all.nl/homspace/samplerbox/ has a different connection scheme for the LCD
So question number
1) what is the "Samplerbox Standard" for connecting the LCD 16x2 to the GPIO?
I downloaded and "baked" the image "2017-05-17_samplerbox.img.zip" from the this site (samplerbox.org) and booted on my raspberry pi Zero and everything works except the Screen which turns on and shows all squares on the bottom line only.
I configured the file config.ini on the root with the following
MAX_POLYPHONY = 40
MIDI_CHANNEL = 1
SAMPLERATE = 44100
GLOBAL_VOLUME = 100
USE_FREEVERB = False
USE_I2C_7SEGMENTDISPLAY = False
USE_SERIALPORT_MIDI = False
USE_TONECONTROL = False
USE_HD44780_16X2_LCD = True
USE_HD44780_20X4_LCD = False
USE_BUTTONS = True
USE_GUI = False
SAMPLES_DIR = None
AUDIO_DEVICE_ID = 2 (for my USB keyboard/audio interface)
AUDIO_DEVICE_NAME = autodetect
BOXRELEASE = 30
PRESET_BASE = 0
SYSTEM_MODE = 1 (I tried 2 as well)
RAM_LIMIT_PERCENTAGE = 40
INVERT_SUSTAIN = False
PRINT_MIDI_MESSAGES = True
PRINT_LCD_MESSAGES = True
GPIO_LCD_RS = 7
GPIO_LCD_E = 8
GPIO_LCD_D7 = 18 (configured this in accordance to mine)
GPIO_LCD_D6 = 23 (configured this in accordance to mine)
GPIO_LCD_D5 = 24 (configured this in accordance to mine)
GPIO_LCD_D4 = 25 (configured this in accordance to mine)
BUTTON_LEFT_MIDI = 176, 48, <MIDI CONTROLLER NAME>
BUTTON_RIGHT_MIDI = 176, 50, <MIDI CONTROLLER NAME>
BUTTON_ENTER_MIDI = 176, 49, <MIDI CONTROLLER NAME>
BUTTON_CANCEL_MIDI = 176, 65, <MIDI CONTROLLER NAME>
BUTTON_LEFT_GPIO = 26
BUTTON_RIGHT_GPIO = 13
BUTTON_ENTER_GPIO = 6
BUTTON_CANCEL_GPIO = 12
I tired both system mode 1 and 2 and nothing on the screen.
I can adjust the potentiometer for the contrast and if I go full only squares appears otherwise nothing at all.
What am I doing wrong? Please can anyone help? Thank you so much in advance and thank you for this awesome work!!