/*
|
* Copyright 2009-2011 Cedric Priscal
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
#include <termios.h>
|
#include <unistd.h>
|
#include <sys/types.h>
|
#include <sys/stat.h>
|
#include <fcntl.h>
|
#include <string.h>
|
#include <jni.h>
|
|
#include "SerialPort.h"
|
|
#include "android/log.h"
|
|
static const char *TAG = "serial_port";
|
#define LOGI(fmt, args...) __android_log_print(ANDROID_LOG_INFO, TAG, fmt, ##args)
|
#define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, TAG, fmt, ##args)
|
#define LOGE(fmt, args...) __android_log_print(ANDROID_LOG_ERROR, TAG, fmt, ##args)
|
|
static speed_t getBaudrate(jint baudrate) {
|
switch (baudrate) {
|
case 0:
|
return B0;
|
case 50:
|
return B50;
|
case 75:
|
return B75;
|
case 110:
|
return B110;
|
case 134:
|
return B134;
|
case 150:
|
return B150;
|
case 200:
|
return B200;
|
case 300:
|
return B300;
|
case 600:
|
return B600;
|
case 1200:
|
return B1200;
|
case 1800:
|
return B1800;
|
case 2400:
|
return B2400;
|
case 4800:
|
return B4800;
|
case 9600:
|
return B9600;
|
case 19200:
|
return B19200;
|
case 38400:
|
return B38400;
|
case 57600:
|
return B57600;
|
case 115200:
|
return B115200;
|
case 230400:
|
return B230400;
|
case 460800:
|
return B460800;
|
case 500000:
|
return B500000;
|
case 576000:
|
return B576000;
|
case 921600:
|
return B921600;
|
case 1000000:
|
return B1000000;
|
case 1152000:
|
return B1152000;
|
case 1500000:
|
return B1500000;
|
case 2000000:
|
return B2000000;
|
case 2500000:
|
return B2500000;
|
case 3000000:
|
return B3000000;
|
case 3500000:
|
return B3500000;
|
case 4000000:
|
return B4000000;
|
default:
|
return -1;
|
}
|
}
|
|
/*
|
* Class: android_serialport_SerialPort
|
* Method: open
|
* Signature: (Ljava/lang/String;II)Ljava/io/FileDescriptor;
|
*/
|
JNIEXPORT jobject JNICALL Java_android_1serialport_1api_SerialPort_open
|
(JNIEnv *env, jclass thiz, jstring path, jint baudrate, jint stopBits, jint dataBits,
|
jint parity, jint flowCon, jint flags) {
|
int fd;
|
speed_t speed;
|
jobject mFileDescriptor;
|
|
/* Check arguments */
|
{
|
speed = getBaudrate(baudrate);
|
if (speed == -1) {
|
/* TODO: throw an exception */
|
LOGE("Invalid baudrate");
|
return NULL;
|
}
|
}
|
|
/* Opening device */
|
{
|
jboolean iscopy;
|
const char *path_utf = (*env)->GetStringUTFChars(env, path, &iscopy);
|
LOGD("Opening serial port %s with flags 0x%x", path_utf, O_RDWR | flags);
|
fd = open(path_utf, O_RDWR | flags);
|
LOGD("open() fd = %d", fd);
|
(*env)->ReleaseStringUTFChars(env, path, path_utf);
|
if (fd == -1) {
|
/* Throw an exception */
|
LOGE("Cannot open port");
|
/* TODO: throw an exception */
|
return NULL;
|
}
|
}
|
|
/* Configure device */
|
{
|
struct termios cfg;
|
LOGD("Configuring serial port");
|
if (tcgetattr(fd, &cfg)) {
|
LOGE("tcgetattr() failed");
|
close(fd);
|
/* TODO: throw an exception */
|
return NULL;
|
}
|
|
cfmakeraw(&cfg);
|
cfsetispeed(&cfg, speed);
|
cfsetospeed(&cfg, speed);
|
|
cfg.c_cflag &= ~CSIZE;
|
switch (dataBits) {
|
case 5:
|
cfg.c_cflag |= CS5; //使用5位数据位
|
break;
|
case 6:
|
cfg.c_cflag |= CS6; //使用6位数据位
|
break;
|
case 7:
|
cfg.c_cflag |= CS7; //使用7位数据位
|
break;
|
case 8:
|
cfg.c_cflag |= CS8; //使用8位数据位
|
break;
|
default:
|
cfg.c_cflag |= CS8;
|
break;
|
}
|
|
switch (parity) {
|
case 0:
|
cfg.c_cflag &= ~PARENB; //无奇偶校验
|
break;
|
case 1:
|
cfg.c_cflag |= (PARODD | PARENB); //奇校验
|
break;
|
case 2:
|
cfg.c_iflag &= ~(IGNPAR | PARMRK); // 偶校验
|
cfg.c_iflag |= INPCK;
|
cfg.c_cflag |= PARENB;
|
cfg.c_cflag &= ~PARODD;
|
break;
|
default:
|
cfg.c_cflag &= ~PARENB;
|
break;
|
}
|
|
switch (stopBits) {
|
case 1:
|
cfg.c_cflag &= ~CSTOPB; //1位停止位
|
break;
|
case 2:
|
cfg.c_cflag |= CSTOPB; //2位停止位
|
break;
|
default:
|
break;
|
}
|
|
// hardware flow control
|
switch (flowCon) {
|
case 0:
|
cfg.c_cflag &= ~CRTSCTS; //不使用流控
|
break;
|
case 1:
|
cfg.c_cflag |= CRTSCTS; //硬件流控
|
break;
|
case 2:
|
cfg.c_cflag |= IXON | IXOFF | IXANY; //软件流控
|
break;
|
default:
|
cfg.c_cflag &= ~CRTSCTS;
|
break;
|
}
|
|
|
if (tcsetattr(fd, TCSANOW, &cfg)) {
|
LOGE("tcsetattr() failed");
|
close(fd);
|
/* TODO: throw an exception */
|
return NULL;
|
}
|
}
|
|
/* Create a corresponding file descriptor */
|
{
|
jclass cFileDescriptor = (*env)->FindClass(env, "java/io/FileDescriptor");
|
jmethodID iFileDescriptor = (*env)->GetMethodID(env, cFileDescriptor, "<init>", "()V");
|
jfieldID descriptorID = (*env)->GetFieldID(env, cFileDescriptor, "descriptor", "I");
|
mFileDescriptor = (*env)->NewObject(env, cFileDescriptor, iFileDescriptor);
|
(*env)->SetIntField(env, mFileDescriptor, descriptorID, (jint) fd);
|
}
|
|
return mFileDescriptor;
|
}
|
|
/*
|
* Class: cedric_serial_SerialPort
|
* Method: close
|
* Signature: ()V
|
*/
|
JNIEXPORT void JNICALL Java_android_1serialport_1api_SerialPort_close
|
(JNIEnv *env, jobject thiz) {
|
jclass SerialPortClass = (*env)->GetObjectClass(env, thiz);
|
jclass FileDescriptorClass = (*env)->FindClass(env, "java/io/FileDescriptor");
|
|
jfieldID mFdID = (*env)->GetFieldID(env, SerialPortClass, "mFd", "Ljava/io/FileDescriptor;");
|
jfieldID descriptorID = (*env)->GetFieldID(env, FileDescriptorClass, "descriptor", "I");
|
|
jobject mFd = (*env)->GetObjectField(env, thiz, mFdID);
|
jint descriptor = (*env)->GetIntField(env, mFd, descriptorID);
|
|
LOGD("close(fd = %d)", descriptor);
|
close(descriptor);
|
}
|
