On 11/12/17, Marcus Wolf wrote: > > Am 11.12.2017 um 20:40 schrieb Oliver Graute: > >Hello list, > > > >I just got my pi433 working somehow on Raspberry Pi Model B Rev 2. > > > >Here are my findings: > > > >first I need to enabling spi in config.txt on boot partition. > > > >dtparam=spi=on > > > >then adding this node to bcm2835-rpi-b-rev2.dts and compile. > > > >&spi0_gpio7 { > > pi433: pi433@0 { > > compatible = "Smarthome-Wolf,pi433"; > > reg = <0>; /* CE 0 */ > > #address-cells = <1>; > > #size-cells = <0>; > > spi-max-frequency = <10000000>; > > > > pinctrl-0 = <&pi433_pins>; > > DIO0-gpio = <&gpio 24 0>; > > DIO1-gpio = <&gpio 25 0>; > > DIO2-gpio = <&gpio 7 0>; > > status = "okay"; > > }; > >}; > > > >Then loading spi_bcm2835 and pi433 modules: > > > >modprobe spi_bcm2835 > >modprobe pi433 > > > >Is this the right usage to send some data over the air? > > > >echo 1 > /dev/pi433 > >[ 64.258257] pi433 pi433: thread: going to wait for new messages > > > thanks for testing with real hardware :-) > > In my product, I use Raspbian. Therefore, I work with a kernel from > Raspbian. Raspbian supports device tree overlays. I used a buildroot system for this very first test. > So I don't use dtparam=spi=on, but dtoverlay=pi433. > I don't modify the bcm2835-rpi-b-rev2.dts, but use the > pi433-overlay.dts, provided in the driver documentation. > > I am not sure, whether you need to load spi_bcm2835. I never did > that, but maybe it is done implicitly on my system. > > > Never adressed Pi433 from command line, but always used a program to do so. > Anyway: The way you did it, you missed to setup the tx and/or rx > configuration. I am not sure, whether there are useful defaults in > the current version of the driver, allowing you can start with tx > right from the start. Most probably all entries are preset with > zero, that might lead to an not really perfect configuration of the > chip. So you need to use the ioctl first, to set usefull config > params. ok so I need to configure tx and rx before somehow. I'll look into it. If you could provide some example howto address /dev/pi433 from userspace and example settings would be nice. > I don't know, what generates the hundrets of "write: generated new > msg with 2 bytes.". > This message is shown up, as soon as you ask the driver to send > something. There is an internal (SW) queue, where tx jobs get > stored. The message tells you, that a telegram with 2 bytes was > stored in this queue. I guess the two bytes are the '1' and a new > line, generated by the echo. The repetition of the message is quite > strange. yes its strange, I also assume thats related to missing configuration. > Maybe due to misssing configuration / bad default settings. > As soon, as there is something in the queue, the driver should leave > RX mode (where he was waiting for messages in the air) and start to > transfer the messages from the queue with the given (or in your case > missing) configuration for TX. As soon as the queue is empty, the > driver should reconfigure for RX and restart listening on the air. > > Unfortunally I can't find the source code from my testprogram, that > is compatible with the current version of the driver. Hope I didn't > format the wrong SD-card. > Just found sources for the "old" version of the driver, that was > intended to support more then just Pi433... > > Will provide the source as soon as I find it. that would be great Best regards, Oliver _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel