287 lines
6.5 KiB
C
287 lines
6.5 KiB
C
/*
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* Copyright 2009 Cedric Priscal
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <termios.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <jni.h>
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#include "android/log.h"
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static const char *TAG="serial_port";
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#define LOGI(fmt, args...) __android_log_print(ANDROID_LOG_INFO, TAG, fmt, ##args)
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#define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, TAG, fmt, ##args)
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#define LOGE(fmt, args...) __android_log_print(ANDROID_LOG_ERROR, TAG, fmt, ##args)
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Class: com_android_barcode_SerialPort
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* Method: open
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* Signature: (Ljava/lang/String;I)I
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*/
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JNIEXPORT jint JNICALL Java_com_android_barcode_SerialPort_open
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(JNIEnv *, jclass, jstring, jint);
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/*
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* Class: com_android_barcode_SerialPort
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* Method: write
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* Signature: (ILjava/lang/String;I)I
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*/
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JNIEXPORT jint JNICALL Java_com_android_barcode_SerialPort_write
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(JNIEnv *, jobject, jint, jstring, jint);
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/*
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* Class: com_android_barcode_SerialPort
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* Method: read
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* Signature: (II)[B
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*/
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JNIEXPORT jbyteArray JNICALL Java_com_android_barcode_SerialPort_read
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(JNIEnv *, jobject, jint, jint);
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/*
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* Class: com_android_barcode_SerialPort
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* Method: close
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* Signature: (I)V
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*/
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JNIEXPORT void JNICALL Java_com_android_barcode_SerialPort_close
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(JNIEnv *, jobject, jint);
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#ifdef __cplusplus
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}
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#endif
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static speed_t getBaudrate(jint baudrate)
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{
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switch(baudrate) {
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case 0: return B0;
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case 50: return B50;
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case 75: return B75;
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case 110: return B110;
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case 134: return B134;
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case 150: return B150;
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case 200: return B200;
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case 300: return B300;
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case 600: return B600;
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case 1200: return B1200;
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case 1800: return B1800;
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case 2400: return B2400;
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case 4800: return B4800;
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case 9600: return B9600;
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case 19200: return B19200;
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case 38400: return B38400;
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case 57600: return B57600;
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case 115200: return B115200;
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case 230400: return B230400;
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case 460800: return B460800;
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case 500000: return B500000;
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case 576000: return B576000;
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case 921600: return B921600;
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case 1000000: return B1000000;
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case 1152000: return B1152000;
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case 1500000: return B1500000;
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case 2000000: return B2000000;
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case 2500000: return B2500000;
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case 3000000: return B3000000;
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case 3500000: return B3500000;
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case 4000000: return B4000000;
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default: return -1;
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}
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}
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/*
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* Class: cedric_serial_SerialPort
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* Method: open
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* Signature: (Ljava/lang/String;)V
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*/
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JNIEXPORT jint JNICALL Java_com_android_barcode_SerialPort_open
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(JNIEnv *env, jobject thiz, jstring path, jint baudrate)
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{
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int fd;
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speed_t speed;
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/* Check arguments */
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{
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speed = getBaudrate(baudrate);
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if (speed == -1) {
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/* TODO: throw an exception */
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LOGE("Invalid baudrate");
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}
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}
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/* Opening device */
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{
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jboolean iscopy;
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const char *path_utf = (*env)->GetStringUTFChars(env, path, &iscopy);
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LOGD("Opening serial port %s", path_utf);
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fd = open(path_utf, O_RDWR | O_SYNC);
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LOGD("open() fd = %d", fd);
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(*env)->ReleaseStringUTFChars(env, path, path_utf);
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if (fd == -1)
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{
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/* Throw an exception */
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LOGE("Cannot open port");
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/* TODO: throw an exception */
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}
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}
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/* Configure device */
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{
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struct termios cfg;
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LOGD("Configuring serial port");
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if (tcgetattr(fd, &cfg))
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{
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LOGE("tcgetattr() failed");
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close(fd);
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/* TODO: throw an exception */
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}
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cfmakeraw(&cfg);
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cfsetispeed(&cfg, speed);
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cfsetospeed(&cfg, speed);
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/*******************************/
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cfg.c_cflag &= ~CSIZE;
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cfg.c_lflag &= ~(ICANON|ECHO|ECHOE|ISIG);
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cfg.c_oflag &= ~OPOST;
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//'8' bit
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cfg.c_cflag |= CS8;
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//'N' PARENB
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cfg.c_cflag &= ~PARENB;
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cfg.c_iflag &= ~INPCK;
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//'1' STOP
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cfg.c_cflag &= ~CSTOPB;
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cfg.c_cc[VTIME] = 15;
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cfg.c_cc[VMIN] = 0;
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tcflush(fd, TCIFLUSH);
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/*********************************/
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if (tcsetattr(fd, TCSANOW, &cfg))
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{
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LOGE("tcsetattr() failed");
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close(fd);
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/* TODO: throw an exception */
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}
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}
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return fd;
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}
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/*
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* Class: cedric_serial_SerialPort
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* Method: write
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* Signature: ()V
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*/
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JNIEXPORT jint JNICALL Java_com_android_barcode_SerialPort_write
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(JNIEnv *env, jobject obj, jint fd, jstring str, jint len)
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{
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jboolean iscopy;
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const char *buff_utf = (*env)->GetStringUTFChars(env, str, &iscopy);
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int wlen = 0;
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wlen = write(fd, buff_utf, len);
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if(wlen > 0)
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{
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LOGD("Write serial port %s\n", buff_utf);
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}
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else
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{
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LOGE("Write failed\n");
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}
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(*env)->ReleaseStringUTFChars(env, str, buff_utf);
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LOGD("Write finish!\n");
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return wlen;
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}
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/*
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* Class: cedric_serial_SerialPort
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* Method: read
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* Signature: ()V
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*/
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JNIEXPORT jbyteArray JNICALL Java_com_android_barcode_SerialPort_read
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(JNIEnv *env, jobject obj, jint fd, jint len)
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{
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int reval;
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int nread = 0;
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char buff[len];
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char result[len];
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struct timeval tv;
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jbyteArray jba;
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fd_set rfds;
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while(1)
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{
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FD_ZERO(&rfds);
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FD_SET(fd, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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if ((reval = select(1 + fd, &rfds, NULL, NULL, &tv)) > 0)
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{
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if(FD_ISSET(fd, &rfds))
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{
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int temp = read(fd, buff + nread, len);
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nread += temp;
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LOGD("%i us is used", 100000 - tv.tv_usec);
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LOGD("wo have data %d\n", temp);
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}
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}
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else if(reval == 0 && nread != 0) //timeout means
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{
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// int ffd;
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buff[nread]=0;
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// ffd = open("/data/ndk", O_WRONLY | O_TRUNC);
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// write(ffd, buff, nread);
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// close(ffd);
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int i, j;
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for(i = 0, j = 0; i < nread; i++)
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{
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if(buff[i] != 0)
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{
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result[j] = buff[i];
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j++;
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}
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// LOGD("0x%2x ", buff[i]);
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}
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//LOGD("\n");
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//result[j] = 0;
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jba = (*env)->NewByteArray(env, j);
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(*env)->SetByteArrayRegion(env, jba, 0, j, result);
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/* jba = (*env)->NewByteArray(env, nread);
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(*env)->SetByteArrayRegion(env, jba, 0, nread, buff);*/
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LOGD("readlength=%d\n, reallength=%d\n, all data received!\n", nread, j);
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return jba;
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}
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else
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{
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return NULL;
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}
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}
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}
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/*
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* Class: cedric_serial_SerialPort
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* Method: close
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_com_android_barcode_SerialPort_close
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(JNIEnv *env, jobject obj, jint fd)
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{
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close(fd);
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}
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