FTDI TTL與Linux

Question

爲了向外部設備發送命令，我使用FTDI的TTL-232R-3V3線。我想在那裏設定具體的路徑，以高或低。奇偶或停止位不是必需的。

我的操作系統是Ubuntu Linux 13.04。

我想開發一個Java或C應用程序，它可以發送這些命令。但是，當我嘗試安裝電線的驅動程序時出現錯誤：

我遵循this指令，並且我決定安裝D2XX驅動程序。我想我已經成功安裝了第2.1步中描述的共享對象和靜態庫，無論如何我沒有收到任何錯誤消息。

但是，當我嘗試編譯示例代碼，如步驟3中所述，我得到以下輸出執行make -B命令。

for n in BitMode EEPROM/erase EEPROM/read EEPROM/write EEPROM/user/read EEPROM/user/size EEPROM/user/write Events LargeRead MultiThread SetVIDPID Simple Timeouts ; do make -C $n || exit 1; done 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/BitMode' 
gcc main.c -o bitmode -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/BitMode' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/erase' 
gcc main.c -o erase -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/erase' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/read' 
gcc main.c -o read -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/read' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/write' 
gcc main.c -o write -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/write' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/read' 
gcc main.c -o readua -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/read' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/size' 
gcc main.c -o sizeua -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/size' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/write' 
gcc main.c -o writeua -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/EEPROM/user/write' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/Events' 
gcc main.c -o events -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/Events' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/LargeRead' 
gcc main.c -o largeread -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/LargeRead' 
make[1]: Betrete Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/MultiThread' 
gcc main.c -o multi -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples/MultiThread' 
gcc main.c -o multi -Wall -Wextra -L. -lftd2xx -Wl,-rpath /usr/local/lib 
/usr/bin/ld: /tmp/ccoAsrRg.o: undefined reference to symbol  'pthread_create@@GLIBC_2.2.5' 
/usr/bin/ld: note: 'pthread_create@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux- gnu/libpthread.so.0 so try adding it to the linker command line 
/lib/x86_64-linux-gnu/libpthread.so.0: could not read symbols: Ungültiger Vorgang 
collect2: Fehler: ld gab 1 als Ende-Status zurück 
make[1]: *** [multi] Fehler 1 
make[1]: Verlasse Verzeichnis '/home/robin/Dokumente/Java/Stepper/lib/release/examples /MultiThread' 
make: *** [subdirs] Fehler 1 

我該如何解決這個錯誤？有人有這種線和Linux的經驗嗎？ 在此先感謝！

Answer 1

某些示例或其某個依賴項正在使用pthread，但未配置Makefile。

編輯Makefile並將-pthread添加到CFLAGS和LDFLAGS。您可以通過添加行來達到這一目的。

CFLAGS += -pthread 
LDFLAGS += -pthread 

但是，您可能根本不需要D2XX庫。 FTDI內核驅動程序應該創建一個可以像「真實」串行端口一樣使用的設備。