Raspberries/mraa
Private
Public Access
2
0
Fork 0
Code Activity

iio: initial API and enumeration of devices

Browse Source 
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2015-09-28 16:26:53 +01:00
parent 0f312545e0
commit d920d136ea
4 changed files with 95 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
src/mraa.c
View File

@@ -52,6 +52,9 @@ mraa_board_t* plat = NULL;
static char platform_name[MAX_PLATFORM_NAME_LENGTH];
mraa_adv_func_t* advance_func;
static int num_i2c_devices = 0;
static int num_iio_devices = 0;
const char*
mraa_get_version()
{
@@ -70,6 +73,17 @@ mraa_set_log_level(int level)
return MRAA_ERROR_INVALID_PARAMETER;
}
static int
mraa_count_iio_devices(const char* path, const struct stat* sb, int flag, struct FTW* ftwb)
{
switch (sb->st_mode & S_IFMT) {
case S_IFLNK:
num_iio_devices++;
break;
}
return 0;
}
#if (defined SWIGPYTHON) || (defined SWIG)
mraa_result_t
#else
@@ -142,6 +156,30 @@ mraa_init()
}
#endif
// Now detect IIO devices, linux only
// find how many i2c buses we have if we haven't already
if (num_iio_devices == 0) {
if (nftw("/sys/bus/iio/devices", &mraa_count_iio_devices, 20, FTW_PHYS) == -1) {
return MRAA_ERROR_UNSPECIFIED;
}
}
char name[64], filepath[64];
int fd, len, i;
plat->iio_device_count = num_iio_devices;
plat->iio_devices = calloc(num_iio_devices, sizeof(struct _iio));
struct _iio* device;
for (i=0; i < num_iio_devices; i++) {
device = &plat->iio_devices[i];
device->num = i;
snprintf(filepath, 64, "/sys/bus/iio/devices/iio:device%d", i);
fd = open(filepath, O_RDONLY);
if (fd != -1) {
len = read(fd, &name, 64);
device->name = malloc((sizeof(char) * len) + sizeof(char));
strncpy(device->name, name, len);
}
}
syslog(LOG_NOTICE, "libmraa initialised for platform '%s' of type %d", mraa_get_platform_name(), mraa_get_platform_type());
return MRAA_SUCCESS;
}
@@ -625,10 +663,8 @@ mraa_link_targets(const char* filename, const char* targetname)
}
}
static int num_i2c_devices = 0;
static int
mraa_count_files(const char* path, const struct stat* sb, int flag, struct FTW* ftwb)
mraa_count_i2c_files(const char* path, const struct stat* sb, int flag, struct FTW* ftwb)
{
switch (sb->st_mode & S_IFMT) {
case S_IFLNK:
@@ -654,7 +690,7 @@ mraa_find_i2c_bus(const char* devname, int startfrom)
// find how many i2c buses we have if we haven't already
if (num_i2c_devices == 0) {
if (nftw("/sys/class/i2c-dev/", &mraa_count_files, 20, FTW_PHYS) == -1) {
if (nftw("/sys/class/i2c-dev/", &mraa_count_i2c_files, 20, FTW_PHYS) == -1) {
return -1;
}
}
@@ -724,3 +760,22 @@ mraa_get_sub_platform_index(int pin_or_bus)
{
return pin_or_bus & (~MRAA_SUB_PLATFORM_MASK);
}
int
mraa_get_iio_device_count()
{
return plat->iio_device_count;
}
int
mraa_find_iio_device(const char* devicename)
{
int i = 0;
for (i; i < plat->iio_device_count; i++) {
#if 0
if (!strcmp() {
}
#endif
}
return 0;
}