diff options
Diffstat (limited to 'src/examples/px4_simple_app/px4_simple_app.c')
| -rw-r--r-- | src/examples/px4_simple_app/px4_simple_app.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/examples/px4_simple_app/px4_simple_app.c b/src/examples/px4_simple_app/px4_simple_app.c index 4e9f099ed..e22c59fa2 100644 --- a/src/examples/px4_simple_app/px4_simple_app.c +++ b/src/examples/px4_simple_app/px4_simple_app.c @@ -75,30 +75,33 @@ int px4_simple_app_main(int argc, char *argv[]) for (int i = 0; i < 5; i++) { /* wait for sensor update of 1 file descriptor for 1000 ms (1 second) */ int poll_ret = poll(fds, 1, 1000); - + /* handle the poll result */ if (poll_ret == 0) { /* this means none of our providers is giving us data */ printf("[px4_simple_app] Got no data within a second\n"); + } else if (poll_ret < 0) { /* this is seriously bad - should be an emergency */ if (error_counter < 10 || error_counter % 50 == 0) { /* use a counter to prevent flooding (and slowing us down) */ printf("[px4_simple_app] ERROR return value from poll(): %d\n" - , poll_ret); + , poll_ret); } + error_counter++; + } else { - + if (fds[0].revents & POLLIN) { /* obtained data for the first file descriptor */ struct sensor_combined_s raw; /* copy sensors raw data into local buffer */ orb_copy(ORB_ID(sensor_combined), sensor_sub_fd, &raw); printf("[px4_simple_app] Accelerometer:\t%8.4f\t%8.4f\t%8.4f\n", - (double)raw.accelerometer_m_s2[0], - (double)raw.accelerometer_m_s2[1], - (double)raw.accelerometer_m_s2[2]); + (double)raw.accelerometer_m_s2[0], + (double)raw.accelerometer_m_s2[1], + (double)raw.accelerometer_m_s2[2]); /* set att and publish this information for other apps */ att.roll = raw.accelerometer_m_s2[0]; @@ -106,6 +109,7 @@ int px4_simple_app_main(int argc, char *argv[]) att.yaw = raw.accelerometer_m_s2[2]; orb_publish(ORB_ID(vehicle_attitude), att_pub, &att); } + /* there could be more file descriptors here, in the form like: * if (fds[1..n].revents & POLLIN) {} */ |