examples/mlx90614/mlx90614_main.c: Include support to change device address on mlx90614
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
@@ -101,6 +102,42 @@ int mlx90614_main(int argc, char *argv[])
return -1;
}
+ /* If user passed a new address */
+
+ if (argc == 2)
+ {
+ FAR char *buffer;
+ uint8_t newaddr;
+
+ buffer = argv[1];
+
+ if (buffer[0] != '0' && buffer[1] != 'x')
+ {
+ fprintf(stderr, "You need to pass the I2C address in hexa: 0xNN\n");
+ goto out;
+ }
+
+ newaddr = strtol(buffer, NULL, 16);
+
+ if (newaddr == 0 || newaddr > 0x7f)
+ {
+ fprintf(stderr, "Inform a valid I2C address: 0x01 to 0x7f\n");
+ goto out;
+ }
+
+ ret = ioctl(fd, SNIOC_CHANGE_SMBUSADDR, (unsigned long)((uintptr_t)&newaddr));
+ if (ret < 0)
+ {
+ fprintf(stderr, "ERROR: ioctl(SNIOC_CHANGE_SMBUSADDR) failed: %d\n", errno);
+ goto out;
+ }
+
+ printf("Address 0x%02x stored on your device!\n", newaddr);
+ printf("Please do a power cycle and update the I2C board address!\n");
+
+ goto out;
+ }
+
for (; ; )
{
/* Read new temperature from sensor */
@@ -127,6 +164,8 @@ int mlx90614_main(int argc, char *argv[])
usleep(MILISEC_DELAY * 1000);
}
+out:
+
close(fd);
return 0;
}
