EVM LED Blinking.c - Revision history

Cschalle: Fix spelling of category

2011-10-27T20:33:11Z

Fix spelling of category

Peter Huewe at 14:11, 27 October 2011

2011-10-27T14:11:48Z

Dirk: Move content to official wiki

2007-12-16T16:41:27Z

Move content to official wiki

Ekiller200 at 20:15, 12 September 2007

2007-09-12T20:15:51Z

SpaceMonkey at 22:36, 21 May 2007

2007-05-21T22:36:20Z

SpaceMonkey at 22:35, 21 May 2007

2007-05-21T22:35:26Z

SpaceMonkey at 22:35, 21 May 2007

2007-05-21T22:35:19Z

SpaceMonkey at 22:34, 21 May 2007

2007-05-21T22:34:19Z

Ekiller200 at 22:29, 21 May 2007

2007-05-21T22:29:15Z

Ekiller200 at 22:25, 21 May 2007

2007-05-21T22:25:25Z

New page

<nowiki>/**********************************************************************
* EVM_LED_BLINKING.C
*
* Simple program to blink the LEDs on the DaVinci
* EVM using the the LED port expander PCF8574A at I2C Slave Address 0x38.
* I2C Support and I2C device interface must be turned on in the kernel.
*
**************************************************************************/

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <signal.h>

#define I2C_DEVICE "/dev/i2c/0"
#define I2C_DEV_ADDR 0x38
#define I2C_SLAVE 0x0703

int main()
{
int i2c_fd;

int state = 0;
unsigned char val = 0x00;

int ret;

struct timespec req =
{
.tv_sec = 0,
.tv_nsec = 100000000,
};

if((i2c_fd = open(I2C_DEVICE,O_RDWR)) < 0)
{
printf("Unable to open the i2c port!\n");
exit(1);
}

if(ioctl(i2c_fd, I2C_SLAVE, I2C_DEV_ADDR)== -1)
{
close( i2c_fd );
printf("Unable to setup the i2c port!\n");
exit(1);
}

do
{
val <<= 1;
val |= 0x01;

if(val == 0xFF)
val = 0xFE;

write( i2c_fd, &val, 1);

} while (!nanosleep (&req, NULL));

close ( i2c_fd );
printf ("End.\n");
return 0;

}
</nowiki>/

@@ Line 1: / Line 1: @@
 See [http://wiki.davincidsp.com/index.php?title=LED_usage_on_DVEVM LED usage on DaVinci EVM] article of [http://wiki.davincidsp.com/index.php?title=Main_Page official DaVinci wiki].
+[[Category:DaVinci]]
-−
-[[Category:Davinci]]

← Older revision		Revision as of 14:11, 27 October 2011
Line 1:		Line 1:
	See [http://wiki.davincidsp.com/index.php?title=LED_usage_on_DVEVM LED usage on DaVinci EVM] article of [http://wiki.davincidsp.com/index.php?title=Main_Page official DaVinci wiki].		See [http://wiki.davincidsp.com/index.php?title=LED_usage_on_DVEVM LED usage on DaVinci EVM] article of [http://wiki.davincidsp.com/index.php?title=Main_Page official DaVinci wiki].
		+
		+
		+
		+	[[Category:Davinci]]

@@ Line 1: / Line 1: @@
-<code>
+<code><pre>
 /**********************************************************************
 * EVM_LED_BLINKING.C
@@ Line 76: / Line 76: @@
+}
-</code>
+</pre></code>

@@ Line 1: / Line 1: @@
-<code><pre>
+See [http://wiki.davincidsp.com/index.php?title=LED_usage_on_DVEVM LED usage on DaVinci EVM] article of [http://wiki.davincidsp.com/index.php?title=Main_Page official DaVinci wiki].
-/**********************************************************************
-* EVM_LED_BLINKING.C
-* Eric Tanner 2007.
-−
-* Simple program to blink the LEDs on the DaVinci
-* EVM using the the LED port expander PCF8574A at I2C Slave Address 0x38.
-* I2C Support and I2C device interface must be turned on in the kernel.
-−
-**************************************************************************/
-−
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <errno.h>
-#include <signal.h>
-−
-−
-#define I2C_DEVICE      "/dev/i2c/0"
-#define I2C_DEV_ADDR    0x38
-#define I2C_SLAVE       0x0703
-−
-int main()
-−
-        int i2c_fd;
-−
-        int state = 0;
-        unsigned char val = 0x00;
-−
-        int ret;
-−
-        struct timespec req =
-−
-                .tv_sec = 0,
-                .tv_nsec = 100000000,
-        };
-−
-−
-−
-        if((i2c_fd = open(I2C_DEVICE,O_RDWR)) < 0)
-−
-                printf("Unable to open the i2c port!\n");
-                exit(1);
-−
-−
-−
-−
-        if(ioctl(i2c_fd, I2C_SLAVE, I2C_DEV_ADDR)== -1)
-−
-                close( i2c_fd );
-                printf("Unable to setup the i2c port!\n");
-                exit(1);
-−
-−
-        do
-−
-                val <<= 1;
-                val |= 0x01;
-−
-                if(val == 0xFF)
-                        val = 0xFE;
-−
-                write( i2c_fd, &val, 1);
-−
-−
-         } while (!nanosleep (&req, NULL));
-−
-−
-        close ( i2c_fd );
-        printf ("End.\n");
-        return 0;
-−
-−
-</pre></code>

@@ Line 1: / Line 1: @@
-<nowiki>/**********************************************************************
+<nowiki>
 * EVM_LED_BLINKING.C
+*
@@ Line 75: / Line 76: @@
+}
-</nowiki>/
+</nowiki>