On Sunday, 16 August 2020 10:35:08 BST Ralph Corderoy wrote: > Does it find it? I thought the Waveshare software was obtained through > 1.5inch_OLED_Moudle.7z [sic].
Doh! As you no doubt are well aware by now, my memory doesn't serve me well these days. I had forgotten about that. > DEV_Config.py includes > > OLED_RST_PIN = 25 > OLED_DC_PIN = 24 > OLED_CS_PIN = 8 It's the OLED_CS_PIN (and possibly the OLED_DC_PIN) that I will probably want to manage. > SPI = spidev.SpiDev(0, 0) > SPI.max_speed_hz = 20000000 > SPI.mode = 0b00 > > https://luma-oled.readthedocs.io/en/latest/hardware.html#spi > details pins used and it tallies with the above. It also says > > Because CS is connected to CE0, the display is available on SPI > port 0. You can connect it to CE1 to have it available on port 1. > If so, pass port=1 in your serial interface create call. > > And I would guess it's referring to those ‘0, 0’ passed to > spidev.SpiDev() above which probably arrive at > https://github.com/doceme/py-spidev#methods open(): > > Connects to the specified SPI device, opening > /dev/spidev<bus>.<device> I had misunderstood that when I looked at this previously and assumed that SPI0 and SPI1 on the Pi GPIO Pins referred to two discrete buses which could then have 1 to n devices attached and selected by the CS lines. I can see that I can obviously have two devices attached, based on the above, but more than two might mean a bit more hoop-jumping, assuming it's available at all. More research needed here I think. Thanks for your help Ralph. -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2020-09-01 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
