Control a SSD1351 RGB oled screen, with a FT232H Adafruit controller. SUCCESS

Board : nvidia jetson tx2 (ARMv8) System : ubuntu 16.04 64bits Python 2.7 Linux kernel : 4.4.38

hello all, I’ll have some questions, 'cause I’d like to control a SSD1351 oled RGB screen(s) For that, I have a FT232H board, who creates SPI and GPIO capacities, from usb.

I installed luma package :

cd ~/luma/
sudo python setup.py install

sudo python
from luma.oled.device import ssd1351
ImportError: No module named luma.oled.device

?? Do you have an idea ? Thanks, Vincent PS : Merry christmas to you all !!!

[elpimous]

Hi. I finally had success !! Thanks a lot for help. Here is the mods for luma.oled use on ssd1351, with the FT232H controller :

Modify : luma/core/interface/serial.py : the SPI class :

    def __init__(self, spi=None, gpio=None, gpio_DC=10, gpio_RST=9):

        bitbang.__init__(self, gpio, 4096, DC=gpio_DC, RST=gpio_RST)

        try:
            #self._spi.open(port, device)
            self._spi = spi
        except (IOError, OSError) as e:
            if e.errno == errno.ENOENT:
                raise luma.core.error.DeviceNotFoundError('SPI device not found')
            else:  # pragma: no cover
                raise

save and close.

Now, on top on your python demo file, add this :

#------------ for FT232H module ------------------------------------------------------
from luma.core.interface.serial import spi
from luma.oled.device import ssd1351

# Import GPIO and FT232H modules.
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.FT232H as FT232H

# Temporarily disable FTDI serial drivers to use the FT232H device.
FT232H.use_FT232H()
 
# Create an FT232H device instance.
ft232h = FT232H.FT232H()

# Pins initialization
CS = 8 #C0
RESET = 9 #C1
DC = 10 #C2

# Create an FT232H SPI object with the specified chip select pin.
serial = FT232H.SPI(ft232h, cs=CS)

# Create an FT232H GPIO object 
ft232h_gpio = ft232h

# Create the SSD1351 oled display object.
serial = spi(spi=FT232H.SPI(ft232h, cs=CS), gpio=ft232h_gpio, gpio_DC=DC, gpio_RST=RESET)
oled = ssd1351(serial)
#--------------------------------------------------------------------------------------

So, rename your device :

if __name__ == "__main__":
    try:
        #device = get_device()
        device = oled
        main()
    except KeyboardInterrupt:
        pass

Now, just power your oled screen with 5v offered by the Adafruit FT232H small board (limited to 500Mah) My robot, Alfred, is happy : it has 2 beautiful color eyes…

[TCB13]

For future reference, now there’s a WCH CH347 based board for 5$ and the FT232H still cost around 15$.

https://www.cnx-software.com/2022/09/01/5-ch347-board-is-a-usb-2-0-bridge-to-i2c-spi-uart-jtag-and-gpio/