PX4自动驾驶仪:“初始化从指针开始整型而不投射”
问题描述:
我目前已经开始使用PX4自动驾驶仪,并且正在通过其中一个示例应用程序,并试图编译固件并将其上载到Pixhawk。PX4自动驾驶仪:“初始化从指针开始整型而不投射”
的问题是,它加载失败给我的这些错误:
化妆[2]:* [px4_simple_app.co]错误1请[1]:* [/ C/PX4 /Firmware/Build/px4fmu-v2_default.build//c/px4/Firmware/src/examples/px4_simple_app/module.pre.o] 错误2 make [1]:离开目录 `/ c/px4/Firmware/Build /px4fmu-v2_default.build'make:*** [/c/px4/Firmware/Build/px4fmu-v2_default.build/firmware.px4]错误2
我不知道这些意味着什么,但检查程式码,它给了我这个错误在一定行:
初始化将指针整数,未作铸
从这一行:
int att_pub_fd = orb_advertise(ORB_ID(vehicle_attitude), &att);
我不知道如何解决这个问题。有人能给我一些帮助吗?
这是代码的其余部分:
/**
* @file px4_simple_app.c
* Minimal application example for PX4 autopilot
*/
#include <string.h>
#include <nuttx/config.h>
#include <unistd.h>
#include <stdio.h>
#include <poll.h>
#include <uORB/uORB.h>
#include <uORB/topics/sensor_combined.h>
#include <uORB/topics/vehicle_attitude.h>
__EXPORT int px4_simple_app_main(int argc, char *argv[]);
int px4_simple_app_main(int argc, char *argv[])
{
printf("Hello Sky!\n");
/* subscribe to sensor_combined topic */
int sensor_sub_fd = orb_subscribe(ORB_ID(sensor_combined));
orb_set_interval(sensor_sub_fd, 1000);
/* advertise attitude topic */
struct vehicle_attitude_s att;
memset(&att, 0, sizeof(att));
int att_pub_fd = orb_advertise(ORB_ID(vehicle_attitude), &att);
/* one could wait for multiple topics with this technique, just using one here */
struct pollfd fds[] = {
{ .fd = sensor_sub_fd, .events = POLLIN },
/* there could be more file descriptors here, in the form like:
* { .fd = other_sub_fd, .events = POLLIN },
*/
};
int error_counter = 0;
while (true) {
/* 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);
}
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]);
/* set att and publish this information for other apps */
att.roll = raw.accelerometer_m_s2[0];
att.pitch = raw.accelerometer_m_s2[1];
att.yaw = raw.accelerometer_m_s2[2];
orb_publish(ORB_ID(vehicle_attitude), att_pub_fd, &att);
}
/* there could be more file descriptors here, in the form like:
* if (fds[1..n].revents & POLLIN) {}
*/
}
}
return 0;
}
答
功能
orb_advertise(ORB_ID(vehicle_attitude), &att)
返回一个指针,且将其分配给一个int。我不知道你要做什么,但如果它指向一个整数比你需要取消引用指针。
Google又下降了吗?它没有给你一个单一的有用的暗示该错误消息? – John3136
是否有任何理由不添加C#和Objective-C标签?如果我错误地删除了C++标记,请重新添加,但删除C标记。所有这些都是**不同的**语言。 – Olaf