ardupilot/ArduCopter/commands_process.pde

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
// For changing active command mid-mission
//----------------------------------------
static void change_command(uint8_t cmd_index)
{
// check we are in AUTO mode
if (control_mode != AUTO) {
return;
}
// limit range
cmd_index = min(g.command_total - 1, cmd_index);
// load command
struct Location temp = get_cmd_with_index(cmd_index);
// verify it's a nav command
if(temp.id > MAV_CMD_NAV_LAST) {
}else{
// clear out command queue
init_commands();
// copy command to the queue
command_nav_queue = temp;
command_nav_index = cmd_index;
execute_nav_command();
}
}
// update_commands - initiates new navigation commands if we have completed the previous command
// called by 10 Hz loop
static void update_commands()
{
if(g.command_total <= 1)
return;
if(command_nav_queue.id == NO_COMMAND) {
// Our queue is empty
// fill command queue with a new command if available, or exit mission
// -------------------------------------------------------------------
// find next nav command
int16_t tmp_index;
if(command_nav_index < g.command_total) {
// what is the next index for a nav command?
tmp_index = find_next_nav_index(command_nav_index + 1);
if(tmp_index == -1) {
exit_mission();
return;
}else{
command_nav_index = tmp_index;
command_nav_queue = get_cmd_with_index(command_nav_index);
execute_nav_command();
}
}else{
// we are out of commands
exit_mission();
return;
}
}
if(command_cond_queue.id == NO_COMMAND) {
// Our queue is empty
// fill command queue with a new command if available, or do nothing
// -------------------------------------------------------------------
// no nav commands completed yet
if(prev_nav_index == NO_COMMAND)
return;
if(command_cond_index >= command_nav_index) {
// don't process the fututre
return;
}else if(command_cond_index == NO_COMMAND) {
// start from scratch
// look at command after the most recent completed nav
command_cond_index = prev_nav_index + 1;
}else{
// we've completed 1 cond, look at next command for another
command_cond_index++;
}
if(command_cond_index < (g.command_total -2)) {
// we're OK to load a new command (last command must be a nav command)
command_cond_queue = get_cmd_with_index(command_cond_index);
if(command_cond_queue.id > MAV_CMD_CONDITION_LAST) {
// this is a do now command
process_now_command();
// clear command queue
command_cond_queue.id = NO_COMMAND;
}else if(command_cond_queue.id > MAV_CMD_NAV_LAST) {
// this is a conditional command
process_cond_command();
}else{
// this is a nav command, don't process
// clear the command conditional queue and index
prev_nav_index = NO_COMMAND;
command_cond_index = NO_COMMAND;
command_cond_queue.id = NO_COMMAND;
}
}
}
}
// execute_nav_command - performs minor initialisation and logging before next navigation command in the queue is executed
static void execute_nav_command(void)
{
// This is what we report to MAVLINK
g.command_index = command_nav_index;
// Save CMD to Log
if(g.log_bitmask & MASK_LOG_CMD)
Log_Write_Cmd(g.command_index, &command_nav_queue);
// clear navigation prameters
reset_nav_params();
// Act on the new command
process_nav_command();
// clear May indexes to force loading of more commands
// existing May commands are tossed.
command_cond_index = NO_COMMAND;
}
// verify_commands - high level function to check if navigation and conditional commands have completed
static void verify_commands(void)
{
// check if navigation command completed
if(verify_nav_command()) {
// clear navigation command queue so next command can be loaded
command_nav_queue.id = NO_COMMAND;
// store our most recent executed nav command
prev_nav_index = command_nav_index;
// Wipe existing conditionals
command_cond_index = NO_COMMAND;
command_cond_queue.id = NO_COMMAND;
}
// check if conditional command completed
if(verify_cond_command()) {
// clear conditional command queue so next command can be loaded
command_cond_queue.id = NO_COMMAND;
}
}
// Finds the next navgation command in EEPROM
static int16_t find_next_nav_index(int16_t search_index)
{
Location tmp;
while(search_index < g.command_total) {
tmp = get_cmd_with_index(search_index);
if(tmp.id <= MAV_CMD_NAV_LAST) {
return search_index;
}else{
search_index++;
}
}
return -1;
}
static void exit_mission()
{
// we are out of commands
g.command_index = 255;
// if we are not on the ground switch to loiter or land
if(!ap.land_complete) {
// try to enter loiter but if that fails land
if (!set_mode(LOITER)) {
set_mode(LAND);
}
}
}