sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

examples/mlx90614/mlx90614_main.c: Include support to change device address on mlx90614

Browse Source
This commit is contained in:
Alan Carvalho de Assis 2018-11-02 07:07:36 -06:00 committed by Gregory Nutt
parent 1617e0dcf0
commit 47e647c56a
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
examples/mlx90614/mlx90614_main.c
View File

@ -43,6 +43,7 @@
#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;
}