ardupilot/libraries/AP_HAL_Linux/Util_RPI.cpp

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#include <AP_HAL/AP_HAL.h>
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_NAVIO || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_RASPILOT || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_ERLEBRAIN2
#include <stdio.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include "Util_RPI.h"
extern const AP_HAL::HAL& hal;
using namespace Linux;
UtilRPI::UtilRPI()
{
_check_rpi_version();
}
#define MAX_SIZE_LINE 50
int UtilRPI::_check_rpi_version()
{
char buffer[MAX_SIZE_LINE];
const char* hardware_description_entry = "Hardware";
const char* v1 = "BCM2708";
const char* v2 = "BCM2709";
char* flag;
FILE* fd;
fd = fopen("/proc/cpuinfo", "r");
while (fgets(buffer, MAX_SIZE_LINE, fd) != NULL) {
flag = strstr(buffer, hardware_description_entry);
if (flag != NULL) {
if (strstr(buffer, v2) != NULL) {
printf("Raspberry Pi 2 with BCM2709!\n");
fclose(fd);
_rpi_version = 2;
return _rpi_version;
}
else if (strstr(buffer, v1) != NULL) {
printf("Raspberry Pi 1 with BCM2708!\n");
fclose(fd);
_rpi_version = 1;
return _rpi_version;
}
}
}
/* defaults to 1 */
fprintf(stderr, "Could not detect RPi version, defaulting to 1\n");
fclose(fd);
_rpi_version = 1;
return _rpi_version;
}
int UtilRPI::get_rpi_version() const
{
return _rpi_version;
}
#endif