i.mx6 Linux, Jni IOCTL differences

/*********************************************************************** * i.mx6 Linux, Jni IOCTL differences * Disclaimer: * In the process of using JNI ioctl (), it is found that it cannot be used as a normal Linux function, * the IOCTL () function of 3 parameters must be used. * 2015-12-20 Shenzhen Nanshan Ping Shan village Zengjianfeng *********************************************************** ***********/#include<unistd.h>#include<sys/types.h>#include<sys/stat.h>#include<fcntl.h>#include<string.h>#include<jni.h>#include"android/log.h"Static Const Char*tag="Buzz";#defineLOGE (FMT, args ...) __android_log_print (Android_log_error, TAG, FMT, # #args)#defineBuzzer_enable 82#defineBuzzer_freqency 83#defineBuzzer_disable 84/** Class:com_android_buzz_buzz * method:enable * Signature: () V*/Jniexportvoidjnicall java_com_android_buzz_buzz_enable (jnienv*env, Jobject obj) {    intFD = open ("/dev/buzzer", O_RDWR); if(FD = =-1) {LOGE ("Open Buzzer device error."); return; }    //IOCTL (FD, buzzer_enable); //cannot use thisIOCTL (FD, Buzzer_enable,0);//it has to be used.Close (FD); //LOGE ("Enable buzzer device.");}/** Class:com_android_buzz_buzz * method:setfrequency * Signature: (I) V*/Jniexportvoidjnicall java_com_android_buzz_buzz_setfrequency (jnienv*env, Jobject obj, Jint frequency) {    intFD = open ("/dev/buzzer", O_RDWR); if(FD = =-1) {LOGE ("Open Buzzer device error."); return;    } IOCTL (FD, buzzer_freqency, frequency);    Close (FD); //LOGE ("Set buzzer device frequency.");}/** Class:com_android_buzz_buzz * method:disable * Signature: () V*/Jniexportvoidjnicall java_com_android_buzz_buzz_disable (jnienv*env, Jobject obj) {    intFD = open ("/dev/buzzer", O_RDWR); if(FD = =-1) {LOGE ("Open Buzzer device error."); return; }    //IOCTL (FD, buzzer_disable); //cannot use thisIOCTL (FD, Buzzer_disable,0);//it has to be used.Close (FD); //LOGE ("Disable buzzer device.");}

i.mx6 Linux, Jni IOCTL differences