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How to probe the fpga_ctrl & fpga_gpio.ko module
Added by HYUNG KI KIM about 10 years ago
I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP mdule.
and, loading the myFPGA.bin , fgpa_ctrlko, fpga_gpio.ko module is successfule.
also, test tool of fpgautil is work well.
modprobe fpga_ctrl --> ok
modprobe fpga_gpio --> ok
when tryting [ echo "146"./sys/class/gpio/export ], it does not work.
below message is apper..
sh: write error: Invalid argument
and, i can only access the number of GPIO on the /sys/class/gpio/export.
so, I think that the function of fpga_gpio_probe() on the fpga_gio.c is not runing..
what is problem and how can i sovle it.
Thank you.
Replies (5)
RE: How to probe the fpga_ctrl & fpga_gpio.ko module - Added by HYUNG KI KIM about 10 years ago
HYUNG KI KIM wrote:
I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP mdule.
and, loading the myFPGA.bin , fgpa_ctrlko, fpga_gpio.ko module is successfule.
also, test tool of fpgautil is work well.modprobe fpga_ctrl --> ok
modprobe fpga_gpio --> okwhen tryting [ echo "146"./sys/class/gpio/export ], it does not work.
below message is apper..sh: write error: Invalid argument
and, i can only access the number of GPIO on the /sys/class/gpio/export.
so, I think that the function of fpga_gpio_probe() on the fpga_gio.c is not runing..
what is problem and how can i sovle it.Thank you.
RE: How to probe the fpga_ctrl & fpga_gpio.ko module - Added by HYUNG KI KIM about 10 years ago
HYUNG KI KIM wrote:
I'm tryint to control FPGA of GPIO on the linux driver side with MityL138-DSP mdule.
and, loading the myFPGA.bin , fgpa_ctrlko, fpga_gpio.ko module is successfule.
also, test tool of fpgautil is work well.modprobe fpga_ctrl --> ok
modprobe fpga_gpio --> okwhen tryting [ echo "146" /sys/class/gpio/export ], it does not work.
below message is apper..sh: write error: Invalid argument
and, i can only access the below number of 144 on the /sys/class/gpio/export.
so, I think that the function of fpga_gpio_probe() on the fpga_gio.c is not runing..
what is problem and how can i sovle it.Thank you.
RE: How to probe the fpga_ctrl & fpga_gpio.ko module - Added by Jonathan Cormier about 10 years ago
Did you mean
echo "146" > /sys/class/gpio/export
RE: How to probe the fpga_ctrl & fpga_gpio.ko module - Added by HYUNG KI KIM about 10 years ago
yes,
echo "146" > /sys/class/gpio/export --> sh: write error: Invalid argument
it may be that fpga_gpio module is not runing
Thank you.
RE: How to probe the fpga_ctrl & fpga_gpio.ko module - Added by Jonathan Cormier about 10 years ago
Have you made any progress with this problem?