#define IIO_SCAN_ELEM "scan_elements"
#define IIO_SLASH_DEV "/dev/"IIO_DEVICE
#define IIO_SYSFS_DEVICE "/sys/bus/iio/devices/"IIO_DEVICE
+#define IIO_EVENTS "events"
mraa_iio_context
mraa_iio_init(int device)
{
- if (device > plat->iio_device_count) {
+ if (device > plat_iio->iio_device_count) {
return NULL;
}
- mraa_iio_get_channel_data(&plat->iio_devices[device]);
- return &plat->iio_devices[device];
+ mraa_iio_get_channel_data(&plat_iio->iio_devices[device]);
+ mraa_iio_get_event_data(&plat_iio->iio_devices[device]);
+
+ return &plat_iio->iio_devices[device];
}
int
return dev->name;
}
+int
+mraa_iio_get_device_num_by_name(const char* name)
+{
+ int i;
+
+ if (plat_iio == NULL) {
+ syslog(LOG_ERR, "iio: platform IIO structure is not initialized");
+ return -1;
+ }
+
+ if (name == NULL) {
+ syslog(LOG_ERR, "iio: device name is NULL, unable to find its number");
+ return -1;
+ }
+
+ for (i = 0; i < plat_iio->iio_device_count; i++) {
+ struct _iio* device;
+ device = &plat_iio->iio_devices[i];
+ // we want to check for exact match
+ if (strncmp(device->name, name, strlen(device->name)+1) == 0) {
+ return device->num;
+ }
+ }
+
+ return -1;
+}
+
mraa_result_t
mraa_iio_read(mraa_iio_context dev, const char* attr_chan, float* data)
{
return MRAA_SUCCESS;
}
+mraa_result_t
+mraa_iio_get_event_data(mraa_iio_context dev)
+{
+ const struct dirent *ent;
+ DIR* dir;
+ int event_num = 0;
+ char buf[MAX_SIZE];
+ char readbuf[32];
+ int fd;
+ int ret = 0;
+ int padint = 0;
+ int curr_bytes = 0;
+ char shortbuf, signchar;
+ memset(buf, 0, MAX_SIZE);
+ snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS, dev->num);
+ dir = opendir(buf);
+ if (dir != NULL) {
+ while ((ent = readdir(dir)) != NULL) {
+ if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"), "_en") == 0) {
+ event_num++;
+ }
+ }
+ dev->event_num = event_num;
+ mraa_iio_event* event;
+ dev->events = calloc(event_num, sizeof(mraa_iio_event));
+ if ( dev->events == NULL)
+ {
+ closedir(dir);
+ return MRAA_ERROR_UNSPECIFIED;
+ }
+ rewinddir(dir);
+ event_num = 0;
+ while ((ent = readdir(dir)) != NULL)
+ {
+ if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"), "_en") == 0) {
+ event = &dev->events[event_num];
+ event->name = strdup(ent->d_name);
+ snprintf(buf, MAX_SIZE, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS "/%s", dev->num, ent->d_name);
+ fd = open(buf, O_RDONLY);
+ if (fd > 0) {
+ if (read(fd, readbuf, 2 * sizeof(char)) != 2) {
+ break;
+ }
+ close(fd);
+ }
+ event->enabled = ((int) strtol(readbuf, NULL, 10));
+ //Todo, read other event info.
+ event_num++;
+ }
+ }
+ closedir(dir);
+ }
+ return MRAA_SUCCESS;
+}
+
+mraa_result_t
+mraa_iio_event_read(mraa_iio_context dev, const char* attribute, float* data)
+{
+ char buf[64];
+ snprintf(buf, 64, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS "/%s", dev->num, attribute);
+ int fd = open(buf, O_RDONLY);
+ if (fd != -1) {
+ int len = read(fd, &buf, 64);
+ *data = strtol(buf, NULL, 10);
+ return MRAA_SUCCESS;
+ }
+ return MRAA_ERROR_UNSPECIFIED;
+}
+
+mraa_result_t
+mraa_iio_event_write(mraa_iio_context dev, const char* attribute, const char* data)
+{
+ int len;
+ char buf[128];
+ snprintf(buf, 128, IIO_SYSFS_DEVICE "%d/" IIO_EVENTS "/%s", dev->num, attribute);
+ int fd = open(buf, O_WRONLY);
+ if (fd != -1) {
+ int len = write(fd, data, ( strlen(data) +1 ));
+ return MRAA_SUCCESS;
+ }
+ return MRAA_ERROR_UNSPECIFIED;
+}
+
+static mraa_result_t
+mraa_iio_event_poll_nonblock(int fd, struct iio_event_data* data)
+{
+ struct pollfd pfd;
+
+ if (fd < 0) {
+ return MRAA_ERROR_INVALID_RESOURCE;
+ }
+
+ pfd.fd = fd;
+ pfd.events = POLLIN;
+
+ // Wait for it forever or until pthread_cancel
+ // poll is a cancelable point like sleep()
+ int x = poll(&pfd, 1, -1);
+
+ read(fd, data, sizeof(struct iio_event_data));
+
+ return MRAA_SUCCESS;
+}
+
+mraa_result_t
+mraa_iio_event_poll(mraa_iio_context dev, struct iio_event_data* data)
+{
+ char bu[MAX_SIZE];
+ int ret;
+ int event_fd;
+ int fd;
+
+ sprintf(bu, IIO_SLASH_DEV "%d", dev->num);
+ fd = open(bu, 0);
+ ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
+ close(fd);
+
+ if (ret == -1 || event_fd == -1)
+ return MRAA_ERROR_UNSPECIFIED;
+
+ ret = read(event_fd, data, sizeof(struct iio_event_data));
+
+ close(event_fd);
+ return MRAA_SUCCESS;
+}
+
+static void*
+mraa_iio_event_handler(void* arg)
+{
+ struct iio_event_data data;
+ mraa_iio_context dev = (mraa_iio_context) arg;
+
+ for (;;) {
+ if (mraa_iio_event_poll_nonblock(dev->fp_event, &data) == MRAA_SUCCESS) {
+ pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+ dev->isr_event(&data);
+ pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+ } else {
+ // we must have got an error code so die nicely
+ pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+ return NULL;
+ }
+ }
+}
+
+mraa_result_t
+mraa_iio_event_setup_callback(mraa_iio_context dev, void (*fptr)(struct iio_event_data* data), void* args)
+{
+ int ret;
+ char bu[MAX_SIZE];
+ if (dev->thread_id != 0) {
+ return MRAA_ERROR_NO_RESOURCES;
+ }
+
+ sprintf(bu, IIO_SLASH_DEV "%d", dev->num);
+ dev->fp = open(bu, O_RDONLY | O_NONBLOCK);
+ if (dev->fp == -1) {
+ return MRAA_ERROR_INVALID_RESOURCE;
+ }
+ ret = ioctl(dev->fp, IIO_GET_EVENT_FD_IOCTL, &dev->fp_event);
+ close(dev->fp);
+
+ if (ret == -1 || dev->fp_event == -1)
+ {
+ return MRAA_ERROR_UNSPECIFIED;
+ }
+
+ dev->isr_event = fptr;
+ pthread_create(&dev->thread_id, NULL, mraa_iio_event_handler, (void*) dev);
+
+ return MRAA_SUCCESS;
+}
+
+mraa_result_t
+mraa_iio_event_extract_event(struct iio_event_data* event, int* chan_type, int* modifier, int* type, int* direction, int* channel, int* channel2, int* different)
+{
+ *chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
+ *modifier= IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
+ *type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
+ *direction = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
+ *channel = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
+ *channel2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
+ *different = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
+ return MRAA_SUCCESS;
+}
#if 0
// does stop make any sense on iio devices?
mraa_result_t
projects / contrib / mraa.git / blobdiff