void* eventLoop(void* data) {
FREContext ctx = (FREContext) data;
float x, y, z;
bps_event_t *event = NULL;
char buffer[256];
// Initialize BPS
bps_initialize();
// Start the gyroscope
if (sensor_request_events(SENSOR_TYPE_GYROSCOPE) != BPS_SUCCESS) {
shutdown = true;
}
// Receive events through the event channel
while (!shutdown) {
event = NULL;
if (bps_get_event(&event, 50) != BPS_SUCCESS)
return NULL;
if (event) {
if (bps_event_get_domain(event) == sensor_get_domain()) {
if (bps_event_get_code(event) == SENSOR_GYROSCOPE_READING) {
if (sensor_event_get_xyz(event, &x, &y, &z) == BPS_SUCCESS) {
sprintf(buffer, "%f&%f&%f", x, y, z);
fprintf(stdout, "Sensor event: %f&%f&%f\n", x, y, z);
fflush(stdout);
if(ctx != NULL) {
FREDispatchStatusEventAsync(ctx, (uint8_t*)"CHANGE", (uint8_t*)buffer);
}
}
}
}
}
}
if (sensor_stop_events(SENSOR_TYPE_GYROSCOPE) != BPS_SUCCESS) {
fprintf(stdout, "Unable to stop sensor\n");
fflush(stdout);
}
// Stop BPS
bps_shutdown();
return NULL;
}
/**
* Thread that handles accelerometer events and
* sends relevant information to a dialog.
*
* @param p Unused.
*/
static void *
accel_main (void *p) {
bool run = true;
bps_event_t *event;
float force_x, force_y, force_z;
bps_initialize();
/*
* Each thread that calls bps_initialize() will have its
* own unique channel ID. Protect it inside a mutex and
* condition variable to avoid race condition where main
* thread tries to use it before we assign it.
*/
pthread_mutex_lock(&chidMutex);
accel_chid = bps_channel_get_active();
pthread_cond_signal(&chidCond);
pthread_mutex_unlock(&chidMutex);
/*
* Create and display a dialog that will show the data.
*/
create_bottom_dialog();
show_bottom_dialog_message("\n\nThis is the Accelerometer Dialog");
if (BPS_SUCCESS != sensor_request_events(SENSOR_TYPE_ACCELEROMETER)) {
fprintf(stderr, "Error requesting sensor's accelerometer events: %s", strerror(errno));
bps_shutdown();
return NULL;
}
sensor_set_rate(SENSOR_TYPE_ACCELEROMETER, ACCELEROMETER_RATE);
sensor_set_skip_duplicates(SENSOR_TYPE_ACCELEROMETER, true);
while (run) {
/*
* Block, at the very least we'll get the "STOP" event
*/
bps_get_event(&event, -1);
if (bps_event_get_domain(event) == local_event_domain) {
if (bps_event_get_code(event) == STOP_REQUEST) {
run = false;
}
}
if (bps_event_get_domain(event) == sensor_get_domain()) {
if (SENSOR_ACCELEROMETER_READING == bps_event_get_code(event)) {
sensor_event_get_xyz(event, &force_x, &force_y, &force_z);
display_accelerometer_reading(force_x, force_y, force_z);
}
}
}
sensor_stop_events(0);
destroy_bottom_dialog();
bps_shutdown();
fprintf(stderr, "Exiting accelerometer thread\n");
return NULL;
}
