/Dev/Mem и используется же if ((fd = open ("/dev/mem",

Question

🐧 RU.UBUNTU — Официальное сообщество пользователей Ubuntu Linux

/Dev/Mem и используется же if ((fd = open ("/dev/mem",

O_RDWR | O_SYNC | O_CLOEXEC)) < 0)
{
if ((fd = open ("/dev/gpiomem", O_RDWR | O_SYNC | O_CLOEXEC) ) >= 0) // We're using gpiomem
{
piGpioBase = 0 ;
usingGpioMem = TRUE ;
}
else
return wiringPiFailure (WPI_ALMOST, "wiringPiSetup: Unable to open /dev/mem or /dev/gpiomem: %s.\n"
" Aborting your program because if it can not access the GPIO\n"
" hardware then it most certianly won't work\n"
" Try running with sudo?\n", strerror (errno)) ;
}
gpio = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_BASE) ;
if (gpio == MAP_FAILED)
return wiringPiFailure (WPI_ALMOST, "wiringPiSetup: mmap (GPIO) failed: %s\n", strerror (errno)) ;
Соответственно получаю ошибку "wiringPiSetup: mmap (GPIO) failed: Operation not permitted"