ardupilot/libraries/AP_HAL_PX4/HAL_PX4_Class.cpp

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
#include <AP_HAL.h>
#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
#include <AP_HAL_PX4.h>
#include "AP_HAL_PX4_Namespace.h"
#include "HAL_PX4_Class.h"
#include "Console.h"
#include "Scheduler.h"
#include "UARTDriver.h"
#include "Storage.h"
#include "RCInput.h"
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#include "RCOutput.h"
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#include "AnalogIn.h"
#include "Util.h"
#include <AP_HAL_Empty.h>
#include <AP_HAL_Empty_Private.h>
#include <stdlib.h>
#include <systemlib/systemlib.h>
#include <nuttx/config.h>
#include <unistd.h>
#include <stdio.h>
#include <pthread.h>
#include <poll.h>
#include <drivers/drv_hrt.h>
using namespace PX4;
static Empty::EmptySemaphore i2cSemaphore;
static Empty::EmptyI2CDriver i2cDriver(&i2cSemaphore);
static Empty::EmptySPIDeviceManager spiDeviceManager;
static Empty::EmptyGPIO gpioDriver;
static PX4ConsoleDriver consoleDriver;
static PX4Scheduler schedulerInstance;
static PX4Storage storageDriver;
static PX4RCInput rcinDriver;
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static PX4RCOutput rcoutDriver;
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static PX4AnalogIn analogIn;
static PX4Util utilInstance;
#define UARTA_DEFAULT_DEVICE "/dev/ttyS0"
#define UARTB_DEFAULT_DEVICE "/dev/ttyS3"
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// only two real UART drivers for now
static PX4UARTDriver uartADriver(UARTA_DEFAULT_DEVICE, "APM_uartA");
static PX4UARTDriver uartBDriver(UARTB_DEFAULT_DEVICE, "APM_uartB");
static Empty::EmptyUARTDriver uartCDriver;
HAL_PX4::HAL_PX4() :
AP_HAL::HAL(
&uartADriver, /* uartA */
&uartBDriver, /* uartB */
&uartCDriver, /* uartC */
&i2cDriver, /* i2c */
&spiDeviceManager, /* spi */
&analogIn, /* analogin */
&storageDriver, /* storage */
&consoleDriver, /* console */
&gpioDriver, /* gpio */
&rcinDriver, /* rcinput */
&rcoutDriver, /* rcoutput */
&schedulerInstance, /* scheduler */
&utilInstance) /* util */
{}
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bool _px4_thread_should_exit = false; /**< Daemon exit flag */
static bool thread_running = false; /**< Daemon status flag */
static int daemon_task; /**< Handle of daemon task / thread */
static bool ran_overtime;
extern const AP_HAL::HAL& hal;
static void semaphore_yield(void *sem)
{
sem_post((sem_t *)sem);
}
/*
this is called when loop() takes more than 1 second to run. If that
happens then something is blocking for a long time in the main
sketch - probably waiting on a low priority driver. Set the priority
of the APM task low to let the driver run.
*/
static void loop_overtime(void *)
{
struct sched_param param;
param.sched_priority = APM_OVERTIME_PRIORITY;
sched_setscheduler(daemon_task, SCHED_FIFO, &param);
ran_overtime = true;
}
static int main_loop(int argc, char **argv)
{
extern void setup(void);
extern void loop(void);
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hal.uartA->begin(57600);
hal.console->init((void*) hal.uartA);
hal.scheduler->init(NULL);
hal.rcin->init(NULL);
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hal.rcout->init(NULL);
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hal.analogin->init(NULL);
setup();
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hal.scheduler->system_initialized();
perf_counter_t perf_loop = perf_alloc(PC_ELAPSED, "APM_loop");
perf_counter_t perf_overrun = perf_alloc(PC_COUNT, "APM_overrun");
sem_t loop_semaphore;
struct hrt_call loop_call;
struct hrt_call loop_overtime_call;
sem_init(&loop_semaphore, 0, 0);
thread_running = true;
::printf("APM: Starting main loop\n");
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while (!_px4_thread_should_exit) {
perf_begin(perf_loop);
/*
this ensures a tight loop waiting on a lower priority driver
will eventually give up some time for the driver to run. It
will only ever be called if a loop() call runs for more than
1 second
*/
hrt_call_after(&loop_overtime_call, 1000000, (hrt_callout)loop_overtime, NULL);
loop();
if (ran_overtime) {
/*
we ran over 1s in loop(), and our priority was lowered
to let a driver run. Set it back to high priority now.
*/
struct sched_param param;
param.sched_priority = APM_MAIN_PRIORITY;
sched_setscheduler(daemon_task, SCHED_FIFO, &param);
perf_count(perf_overrun);
ran_overtime = false;
}
perf_end(perf_loop);
if (hal.scheduler->in_timerprocess()) {
// we are running when a timer process is running! This is
// a scheduling error, and breaks the assumptions made in
// our locking system
::printf("ERROR: timer processing running in loop()\n");
}
/*
give up 500 microseconds of time, to ensure drivers get a
chance to run. This gives us better timing performance than
a poll(NULL, 0, 1)
*/
hrt_call_after(&loop_call, 500, (hrt_callout)semaphore_yield, &loop_semaphore);
sem_wait(&loop_semaphore);
}
thread_running = false;
return 0;
}
static void usage(void)
{
printf("Usage: %s [options] {start,stop,status}\n", SKETCHNAME);
printf("Options:\n");
printf("\t-d DEVICE set terminal device (default %s)\n", UARTA_DEFAULT_DEVICE);
printf("\n");
}
void HAL_PX4::init(int argc, char * const argv[]) const
{
int i;
const char *device = UARTA_DEFAULT_DEVICE;
if (argc < 1) {
printf("%s: missing command (try '%s start')",
SKETCHNAME, SKETCHNAME);
usage();
exit(1);
}
for (i=0; i<argc; i++) {
if (strcmp(argv[i], "start") == 0) {
if (thread_running) {
printf("%s already running\n", SKETCHNAME);
/* this is not an error */
exit(0);
}
uartADriver.set_device_path(device);
printf("Starting %s on %s\n", SKETCHNAME, device);
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_px4_thread_should_exit = false;
daemon_task = task_spawn(SKETCHNAME,
SCHED_FIFO,
APM_MAIN_PRIORITY,
4096,
main_loop,
NULL);
exit(0);
}
if (strcmp(argv[i], "stop") == 0) {
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_px4_thread_should_exit = true;
exit(0);
}
if (strcmp(argv[i], "status") == 0) {
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if (_px4_thread_should_exit && thread_running) {
printf("\t%s is exiting\n", SKETCHNAME);
} else if (thread_running) {
printf("\t%s is running\n", SKETCHNAME);
} else {
printf("\t%s is not started\n", SKETCHNAME);
}
exit(0);
}
if (strcmp(argv[i], "-d") == 0) {
// set terminal device
if (argc > i + 1) {
device = strdup(argv[i+1]);
} else {
printf("missing parameter to -d DEVICE\n");
usage();
exit(1);
}
}
}
usage();
exit(1);
}
const HAL_PX4 AP_HAL_PX4;
#endif // CONFIG_HAL_BOARD == HAL_BOARD_PX4