Hello folks,
i despair of i2c_smbus_write_block_data. I try to send this few bytes:
5D W 11 02 33 44
but my attached example code sends always:
5D W 11 03 33
I'm perfectly happy if somebody can help me! :-)
King Regards,
Nick
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http://de.overview.mail.yahoo.com#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
int main()
{
int fd;
int adapter_nr = 3; /* probably dynamically determined */
unsigned long addr = 0x5d; /* The I2C address */
char filename[20] = {0};
unsigned int size;
char buf[5] = {0};
int res;
int reg;
unsigned char values[3];
sprintf(filename,"/dev/i2c-%d",adapter_nr);
printf("device file: %s\n",filename);
printf("i2c device Address: 0x%x\n",addr);
fd = open(filename,O_RDWR);
res = ioctl(fd,I2C_SLAVE,addr);
reg = 0x11;
values[0] = 0x33;
values[1] = 0x44;
if ( i2c_smbus_write_block_data(fd, reg, 2, values) < 0) {
perror("Error: ");
}
close(filename);
return 0;
}
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