diff options
Diffstat (limited to 'src/modules/mavlink/mavlink_main.cpp')
| -rw-r--r-- | src/modules/mavlink/mavlink_main.cpp | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/modules/mavlink/mavlink_main.cpp b/src/modules/mavlink/mavlink_main.cpp index dd88b0949..199e85305 100644 --- a/src/modules/mavlink/mavlink_main.cpp +++ b/src/modules/mavlink/mavlink_main.cpp @@ -189,9 +189,18 @@ mavlink_send_uart_bytes(mavlink_channel_t channel, const uint8_t *ch, int length /* If the wait until transmit flag is on, only transmit after we've received messages. Otherwise, transmit all the time. */ if (instance->should_transmit()) { - ssize_t ret = write(uart, ch, desired); + + /* check if there is space in the buffer, let it overflow else */ + if (!ioctl(uart, FIONWRITE, (unsigned long)&buf_free)) { + + if (desired > buf_free) { + desired = buf_free; + } + } + + ssize_t ret = write(uart, ch, desired); if (ret != desired) { - // XXX do something here, but change to using FIONWRITE and OS buf size for detection + warnx("TX FAIL"); } } @@ -1523,6 +1532,8 @@ void Mavlink::mavlink_wpm_message_handler(const mavlink_message_t *msg) void Mavlink::mavlink_missionlib_send_message(mavlink_message_t *msg) { + uint8_t missionlib_msg_buf[MAVLINK_MAX_PACKET_LEN]; + uint16_t len = mavlink_msg_to_send_buffer(missionlib_msg_buf, msg); mavlink_send_uart_bytes(_channel, missionlib_msg_buf, len); @@ -2193,7 +2204,7 @@ Mavlink::start(int argc, char *argv[]) task_spawn_cmd(buf, SCHED_DEFAULT, SCHED_PRIORITY_DEFAULT, - 2048, + 2000, (main_t)&Mavlink::start_helper, (const char **)argv); |