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 Posted: Oct 11, 2008 - 07:16 AM |
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Joined: Jun 10, 2007
Posts: 16
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Is there sombody know how I can use yellow leds on STK1000 and switchs on STK1000, useing C/C++. I am useing linux kernal.
cd /config/gpio
mkdir leds
cd leds
echo 1 > gpio_id
echo 0xff > pin_mask
echo 0xff > oe_mask
echo 1 > enabled
cat /dev/urandom > /dev/gpio0
this is working fine no problems
but when I am useing
unsigned long pin_state = 0;
int fd;
fd = open("/dev/gpio0", O_WRONLY);
while (1) {
pin_state = pin_state ^ 1;
write(fd, &pin_state, sizeof(pin_state));
sleep(1);
}
this is not working
Can some body help me I think there is very simple mistake I am doing.
If any one can help me for accessing keys in C/C++ that will be very helpfull for me. I want to use this keys in qtopia
Best regards |
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Posted: Oct 11, 2008 - 07:36 AM |
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Joined: Sep 14, 2003
Posts: 4228
Location: Queanbeyan, Australia
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Do access the keys in Qtopia you'll have to have them appear as a keyboard. This can be done with the gpio-keys driver, search around the forum for that.
Regarding the above code, what failed? Can you confirm that /dev/gpio0 exists before you run the program?
-S. |
_________________
Blag: http://www.niasdigital.com/blag
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Posted: Oct 11, 2008 - 10:33 AM |
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Joined: Jun 10, 2007
Posts: 16
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Thnaks for replay.
But this directory is not exist
What should I have to do in this case
regards
Nimish |
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Posted: Oct 11, 2008 - 10:45 AM |
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Joined: Jun 10, 2007
Posts: 16
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I seen that after excuting
cd /config/gpio
mkdir leds
cd leds
echo 1 > gpio_id
echo 0xff > pin_mask
echo 0xff > oe_mask
echo 1 > enabled
cat /dev/urandom > /dev/gpio0
this I am able to creat /dev/gpio0 and then C program is running.
can you tell me how I can run all together from C
best regards
Nimish |
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Posted: Oct 12, 2008 - 07:29 AM |
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Joined: Sep 14, 2003
Posts: 4228
Location: Queanbeyan, Australia
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You must execute all those above shell commands from C. The /dev/gpio0 file will not exist until the "echo 1 > enabled" bit.
You can either call "echo" from within C using the execute() function or use open/write/close.
-S. |
_________________
Blag: http://www.niasdigital.com/blag
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Posted: Oct 13, 2008 - 07:59 AM |
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Joined: Jun 10, 2007
Posts: 16
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Dear squidgit
Can you tell me how I can use PINGO game on stk1000
For Linux system I am using buildroot 2.2.0.
I think to detech GPIOs in BSP 2.0 atmel patched kernal. so that from start there is /dev/gpio0 is exist.
Can you tell me how I can do this?
One more thing As I see I have 4 GPIO connectors J1 , J2 , J3 , J6 the /dev/gpio0 is on J1 I connected LED connector to J3 and trying same thing to blink LED with
cd /config/gpio
mkdir leds
cd leds
echo 2 > gpio_id
echo 0xff > pin_mask
echo 0xff > oe_mask
echo 2 > enabled
cat /dev/urandom > /dev/gpio1
But this is not working can you guide me what is wrong in this
Best regards
Nimish |
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Posted: Oct 14, 2008 - 08:17 AM |
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Joined: Sep 14, 2003
Posts: 4228
Location: Queanbeyan, Australia
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nimish wrote:
Dear squidgit
Can you tell me how I can use PINGO game on stk1000
For Linux system I am using buildroot 2.2.0.
You mean Pong? Have you seen http://www.avrfreaks.net/wiki/index.php ... pment/Pong ?
Quote:
I think to detech GPIOs in BSP 2.0 atmel patched kernal. so that from start there is /dev/gpio0 is exist.
Um, I think Pong takes care of all this. Do _not_ set up any /dev/gpio0 file or anything. If you do it'll conflict with what Pong tries to do.
Just make sure that the 10 way cable is correctly connected.
Quote:
One more thing As I see I have 4 GPIO connectors J1 , J2 , J3 , J6 the /dev/gpio0 is on J1 I connected LED connector to J3 and trying same thing to blink LED with
cd /config/gpio
mkdir leds
cd leds
echo 2 > gpio_id
echo 0xff > pin_mask
echo 0xff > oe_mask
echo 2 > enabled
cat /dev/urandom > /dev/gpio1
Seems fine (though generally you write '1' to enabled, though any non-zero number works). Donno sry.
-S. |
_________________
Blag: http://www.niasdigital.com/blag
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