SPI not working in of093 and RPi2 about ofxgpio HOT 18 CLOSED

Hi, I will make a couple of quick questions, to understand the problem...

1. you have enabled SPI? There are many ways to do it, simple mode:
     raspi-config -> Advanced Option -> SPI

2. to have a confirmation on the operation of SPI do:
   lsmod | grep bcm

3. you can make a photo at the cable connection?

4. since the last update and 'added a SPI2 class that I have not tested adc3008, you are using SPI or SPI2?

thanks for the tip :)

from ofxgpio.

1. spi is already enabled
2. snd_bcm2835 20511 1
   snd_pcm 75698 1 snd_bcm2835
   snd 51844 5 snd_bcm2835,snd_timer,snd_pcm
   bcm2835_wdt 3225 0
   bcm2835_gpiomem 3040 0
   spi_bcm2835 7286 0
3. i am using spi, not spi2

3 pictures are in a few minutes

from ofxgpio.

from ofxgpio.

you can publish your program setup that contain the "new = SPI()" ?

from ofxgpio.

#include "ofMain.h"
#include "ofAppNoWindow.h"
#include "ofxGPIO.h"

class noWin : public ofBaseApp{
public:
SPI * spi;
int i;
int a2dVal;
int a2dChannel;
unsigned char data[3];

    void setup(){
            i = 20;
            a2dVal = 0;
            a2dChannel = 0;
            spi = new SPI("/dev/spidev0.0", SPI_MODE_0, 1000000, 8);
    }

    void update(){
        data[0] = 1;
            data[1] = 0b10000000 |( ((a2dChannel & 7) << 4));
            data[2] = 0;

            spi->spiWriteRead(data, sizeof(data) );
            a2dVal = 0;
                a2dVal = (data[1]<< 8) & 0b1100000000;
                a2dVal |=  (data[2] & 0xff);
            sleep(2);
            ofLog()<<"Result: " << a2dVal;
    }

};

int main( ){
ofAppNoWindow window;
ofSetupOpenGL(&window, 0,0, OF_WINDOW);
ofRunApp( new noWin() );
}

from ofxgpio.

This is your spi example, which i am using.

from ofxgpio.

you've tried to use interface: /dev/spidev0.1 ?

from ofxgpio.

i tried now
spi = new SPI("/dev/spidev0.1", SPI_MODE_0, 1000000, 8);

but the same error.

from ofxgpio.

I'm trying MCP3008 in the laboratory, short update you

from ofxgpio.

ok the problem exists, but appears to be closely tied to 9.x of openFrameworks paired with a combination of reading from SPI.

In fact, if you try to run this example outside openFrameworks or with a version of openFrameworks < 9.x running fine.

I am attaching an example in C ++ to use without openFrameworks.
extract the zip file in the /home/pi/
cd mcp3008/
make
./main

mcp3008.zip

let me know if this example outside openFrameworks works for you.
in a while I try to figure out the problem, I leave this open.

from ofxgpio.

wow, thank you for this example, this is working.

from ofxgpio.

Have you solved this issue yet?

from ofxgpio.

hello @xumo , I'm sorry I fix this in September I am now out for work.

from ofxgpio.

Do you have any hints, I need deliver earlier? I'l try with OF 8.4, but cannot seem to find the release tar in the main site.
Thanks anyway, this is an awesome addons.

from ofxgpio.

kit_mcp.zip

Hi @xumo

a simple solution without changing the version is to use the demon that you find in the zip writing in a socket are also an example openFrameworks to read socket.

Good day

from ofxgpio.

Yei, thanks a lot.

from ofxgpio.

Hi guys @urbanpixellab @xumo,

I think I've solved the problem with SPI.

good day

from ofxgpio.

That's great. I'll test it as soon as I can.

from ofxgpio.