[MCP3008 on OrangePi Zero]

Having analog input pins floating act like antenna.

You should add some pull-down resistors to prevent that.

 

[How to enable hardware SPI]

Well, as you discovered, Zador's discovery against previous version was important, not for the 4K limitation but for the FIFO size.

Yesterday, I've done only quick tests, so, I'm still apologized for having missed that one.

 

[How to enable hardware SPI]

Folks, I apologize not having reviewed Icenowy's version properly about sun6i_spi_max_transfer_size().

I think I will ping her about this issue ...

[How to enable hardware SPI]

Enjoy your new SPI !

Now you can build small SPI-NOR adaptor, upload U-Boot SPL to this Flash using flashcp, and enjoy booting from USB-Drive without any SDCard ...

 

[How to enable hardware SPI]

Can you try with the one I've placed in attachment ?

sun8i-h3-spi0-spidev.dtbo

[How to enable hardware SPI]

@willmore, have you done "mkdir /sys/kernel/config/device-tree/overlays/spi" before doing the "cat" ?

Do you have a pseudo file /sys/kernel/config/device-tree/overlays/spi/status ?

Can you "cat" to see if it contains "applied" or "unapplied"

 

[Orange Pi Zero Plus 2 available]

That would be great !

 

[OrangePi PC GPIO UART and Arduino]

You've probably missed some steps about overlays.

Try manually the following steps, although not the same way as described in the above post :

mkdir /sys/kernel/config/device-tree/overlays/uart1
cat /boot/dtb/overlay/sun8i-h3-uart1.dtbo > /sys/kernel/config/device-tree/overlays/uart1/dtbo
python
import serial
port = serial.Serial("/dev/ttyS1", 115200, timeout=1)
while True:
    while serport.inWaiting() > 0:
        c = serport.read()
        print c

 

[Sending serial data using the UART on Orange Pi Zero]

Simply use python-serial.

http://pyserial.readthedocs.io/en/latest/shortintro.html

 

[Testers wanted: sunxi Device Tree overlays]

Quote

(I remember reading post by Martin where he explained there was a program to test SPI like that)

Yes, the spidev_test.c can be found on any kernel tree under tools/spi/spidev_test.c or on Linus mainline https://github.com/torvalds/linux/blob/master/tools/spi/spidev_test.c

 

[Testers wanted: sunxi Device Tree overlays]

Of course !

[Testers wanted: sunxi Device Tree overlays]

15 hours ago, zador.blood.stained said:

Changing the default pin and enabling the internal pull-up are the most interesting things to test.

Since Dallas Semiconductor strongly suggest to use 4K7 Pull-Up for OneWire bus, I wouldn't rely on weak internal Pull-Ups which one some SoC are greater than 30K, especially if there are multiple sensor on the same bus or if those have long wires.

[Orange Pi PC does not boot]

I have one of my OPiPC+ that has such trouble, it has a false contact with some of SDCard, which thickness could vary a bit, I simply added a piece of folded paper to make it thicker and false contact disappeared.

 

[Orange PI lite GPIO UBOOT problem]

I doubt that OPi Lite is reacting differently than OPiPC/PC+/One, they are using the same SoC.

Since GPIOs are left floating until been initialized as output, your relay driver circuit must take care of that unknown state using pullup or pulldown.

 

[Dual-boot Armbian + Android]

U-Boot is not currently supporting that, although maybe with new FIT functionalities developed by APritzel could bring that possible in the future.

 

[Orange Pi Lite doesn't connect to WiFi networks]

WiFi password must be between 8 and 32 characters. "True" has only 4 characters, your router should have refused that.

 

[Armbian for OrangePi PC2, AllWinner H5]

Is this firmware file present ?

[Armbian for OrangePi PC2, AllWinner H5]

The CONFIG_I2C_MUX is already present.

Maybe it requires something else ...

 

[OPi Win with A64]

Since this SPI-NOR seems to be a SOICW package, not SOIC, it must be bigger than that.

 

[The partition is not resized to full SD card size.]

No, there is no problem about using the whole space.

The issue will be present when cloning, except if the image is first backed-up on external disk bigger than the sdcard and then shrinked.

 

[Armbian for OrangePi PC2, AllWinner H5]

FDTI/CH341/PL2303 have been added for next mainline nightly build

 

[How to enable hardware SPI]

You are probably using Legacy kernel, so, in such case, take a look at Fex Guide under SPI section :

http://linux-sunxi.org/Fex_Guide

 

[Overlays in armbianEnv.txt]

You can try to edit the main DT instead and place "okay" on all I2C.

[Mac Address Assignment on Orange Zero]

I've looked into driver/of/of_net.c, and all those 3 keywords are supported : address/mac-address/local-mac-address.

I've tried it myself, and effectively it doesn't work.

This means that some bug has been introduced in last few months.

I will have to dig further by adding traces into a custom kernel build.

[Mac Address Assignment on Orange Zero]

Although I didn't verify by trying myself, in 4.10.x, it seems that the keyword is now "local-mac-address".