Re: [Xenomai-help] Try to get recption on driver CAN

[Wolfgang Grandegger <wg@domain.hid>]

Marcel Soulot wrote:
> 
> 
> 2009/4/27 Wolfgang Grandegger <wg@domain.hid <mailto:wg@domain.hid>>
> 
>     Marcel Soulot wrote:
>     > Hi,
>     >
>     > I try to receive data from CAN network. I got a PCI card with a FPGA
>     > which emulates the SJA1000.
>     > So I load the following modules :
>     > insmod ./xeno_can.ko
>     > insmod ./xeno_can_sja1000.ko
>     > insmod ./xeno_can_mem.ko mem=0xe0000800 irq=5 can_clock=80000000
>     cdr=0x8F
>     >
>     > then I configure with :
>     > ./rtcanconfig rtcan0 -v --baudrate=125000 start
>     >
>     > and launch the receive test application :
>     > ./rtcanrecv rtcan0 -v
>     >
>     > The task is running but nothing happen in reception.
>     > I could just say that the transmitter was blocked before I load the
>     > driver. After all the upon configuration, I can check that the
>     > connection with transmitter is now enabled and the data are sent.
> 
>     Do you get interrupts for out-going messages? What does "/proc/xeno/irq"
>     report?.
> 
> 
> I sent the data from another computer so I can check the flow data on my
> CAN device (CANcaseXL). when the driver is unloaded I got the error led
> and when I loaded and configured the driver the led transmit start to
> blink and the error led is off.

Well, I don't understand what that means. Is RT-Socket-CAN working on
you PCI card. If not, what does not work? RX? TX?

>     > First, my question is this procedure have any chance to work ? or I
>     > missed something in the configuration ?
> 
>     I think you need a PCI driver to support your card properly.
> 
> 
> I also already manage a GPIO driver for the same card and it works fine.

Does it use interrupts?

> The driver xeno_can_mem.ko is not designed to access register with
> memory address ? What are the risk espacially if I have to manage
> several differents driver with the same card?

The accesses from and to the device should not be a problem but
interrupt handling might be.

Wolfgang.