CF1、驅動的簡單測試
在上一篇文章中，我們已經把添加驅動模塊做完瞭，並把驅動下載到瞭板子上。下面將介紹一下如何測試驅動是否正常。
這個ttt驅動，我們實現瞭一個讀、一個寫的接口，就此進行簡單的測試：
啟動板子，進入系統，然後進入命令行（可以用串口，也可以用adb shell）
進入dev目錄：
這裡就可以說明： ttt 設備文件已經OK瞭，輸入輸出接口都沒有問題。
當然，這裡還有其他的方式去驗證這個輸入輸出，如：
進入到 /sys/class 的 ttt 設備目錄下：
power
subsystem
uevent
power
subsystem
uevent
val
2、編寫C程序來測試驅動的讀寫
切換到root權限，並進入到android源碼目錄下的 external 目錄：
antlr fsck_msdos libvpx skia
apache-harmony genext2fs libxml2 sonivox
apache-http giflib libxslt speex
apache-xml google-diff-match-patch libyuv sqlite
astl grub llvm srec
bison gtest lohit-fonts srtp
blktrace guava markdown stlport
bluetooth harfbuzz mesa3d strace
bouncycastle hyphenation mksh svox
bsdiff icu4c mockwebserver tagsoup
bzip2 iproute2 mtpd tcpdump
chromium ipsec-tools netcat tinyalsa
clang iptables netperf tinyxml
collada javasqlite neven tremolo
dbus javassist nist-sip v8
dhcpcd jdiff oauth valgrind
dnsmasq jhead opencv webkit
doclava jpeg openssl webp
dropbear jsilver oprofile webrtc
e2fsprogs jsr305 pcre wpa_supplicant
easymock junit ping wpa_supplicant_6
elfutils kernel-headers ping6 wpa_supplicant_8
embunit libffi ppp xmlwriter
emma libgsm proguard yaffs2
esd liblzf protobuf yapp
expat libnfc-nxp qemu zlib
eyes-free libnl-headers qemu-pc-bios
fdlibm libpcap quake
flac libphonenumber replicaisland
android-mock freetype libpng safe-iop
antlr fsck_msdos libvpx skia
apache-harmony genext2fs libxml2 sonivox
apache-http giflib libxslt speex
apache-xml google-diff-match-patch libyuv sqlite
astl grub llvm srec
bison gtest lohit-fonts srtp
blktrace guava markdown stlport
bluetooth harfbuzz mesa3d strace
bouncycastle hyphenation mksh svox
bsdiff icu4c mockwebserver tagsoup
bzip2 iproute2 mtpd tcpdump
chromium ipsec-tools netcat tinyalsa
clang iptables netperf tinyxml
collada javasqlite neven tremolo
dbus javassist nist-sip v8
dhcpcd jdiff oauth valgrind
dnsmasq jhead opencv webkit
doclava jpeg openssl webp
dropbear jsilver oprofile webrtc
e2fsprogs jsr305 pcre wpa_supplicant
easymock junit ping wpa_supplicant_6
elfutils kernel-headers ping6 wpa_supplicant_8
embunit libffi ppp xmlwriter
emma libgsm proguard yaffs2
esd liblzf protobuf yapp
expat libnfc-nxp qemu zlib
eyes-free libnl-headers qemu-pc-bios
fdlibm libpcap quake
flac libphonenumber replicaisland
[cpp]
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#define DEVICE_NAME "/dev/ttt"
int main(int argc, char** argv)
{
int fd = -1;
int val = 0;
fd = open(DEVICE_NAME, O_RDWR);
if(fd == -1){
printf("Failed to open device %s.\n", DEVICE_NAME);
return -1;
}
printf("Read original value:\n");
read(fd, &val, sizeof(val));
printf("%d.\n\n", val);
val = 100;
printf("Write value %d to %s.\n\n", val, DEVICE_NAME);
write(fd, &val, sizeof(val));
printf("Read the value again:\n");
read(fd, &val, sizeof(val));
printf("%d.\n\n", val);
close(fd);
return 0;
}
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#define DEVICE_NAME "/dev/ttt"
int main(int argc, char** argv)
{
int fd = -1;
int val = 0;
fd = open(DEVICE_NAME, O_RDWR);
if(fd == -1){
printf("Failed to open device %s.\n", DEVICE_NAME);
return -1;
}
printf("Read original value:\n");
read(fd, &val, sizeof(val));
printf("%d.\n\n", val);
val = 100;
printf("Write value %d to %s.\n\n", val, DEVICE_NAME);
write(fd, &val, sizeof(val));
printf("Read the value again:\n");
read(fd, &val, sizeof(val));
printf("%d.\n\n", val);
close(fd);
return 0;
}
創建對應的Android.mk配置文件：
[plain]
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2/external/yapp/tttapp# gedit Android.mk
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2/external/yapp/tttapp# gedit Android.mk
Android.mk 文件內容如下：
[cpp] view plaincopyprint?LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := tttapp
LOCAL_SRC_FILES := tttapp.c
include $(BUILD_EXECUTABLE)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := tttapp
LOCAL_SRC_FILES := tttapp.c
include $(BUILD_EXECUTABLE)
C程序編寫完瞭，下面進行編譯：
回到android的源碼目錄，並執行envsetup.sh：
[plain]
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2# ls
abi build device hardware out system
bionic cts docs libcore packages v8.log
bootable dalvik external Makefile prebuilt vendor
boot.img development frameworks ndk sdk
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2# . build/envsetup.sh
including device/moto/stingray/vendorsetup.sh
including device/moto/wingray/vendorsetup.sh
including device/samsung/crespo4g/vendorsetup.sh
including device/samsung/crespo/vendorsetup.sh
including device/samsung/maguro/vendorsetup.sh
including device/samsung/smdkc110/vendorsetup.sh
including device/samsung/smdkv210/vendorsetup.sh
including device/samsung/torospr/vendorsetup.sh
including device/samsung/toro/vendorsetup.sh
including device/samsung/tuna/vendorsetup.sh
including device/ti/panda/vendorsetup.sh
including sdk/bash_completion/adb.bash
including device/moto/stingray/vendorsetup.sh
including device/moto/wingray/vendorsetup.sh
including device/samsung/crespo4g/vendorsetup.sh
including device/samsung/crespo/vendorsetup.sh
including device/samsung/maguro/vendorsetup.sh
including device/samsung/smdkc110/vendorsetup.sh
including device/samsung/smdkv210/vendorsetup.sh
including device/samsung/torospr/vendorsetup.sh
including device/samsung/toro/vendorsetup.sh
including device/samsung/tuna/vendorsetup.sh
including device/ti/panda/vendorsetup.sh
including sdk/bash_completion/adb.bash============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=4.0.4
TARGET_PRODUCT=full
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=IMM76I
============================================
target thumb C: tttapp <= external/yapp/tttapp/tttapp.c
target Executable: tttapp (out/target/product/generic/obj/EXECUTABLES/tttapp_intermediates/LINKED/tttapp)
target Symbolic: tttapp (out/target/product/generic/symbols/system/bin/tttapp)
target Strip: tttapp (out/target/product/generic/obj/EXECUTABLES/tttapp_intermediates/tttapp)
Install: out/target/product/generic/system/bin/tttapp
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=4.0.4
TARGET_PRODUCT=full
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=IMM76I
============================================
target thumb C: tttapp <= external/yapp/tttapp/tttapp.c
target Executable: tttapp (out/target/product/generic/obj/EXECUTABLES/tttapp_intermediates/LINKED/tttapp)
target Symbolic: tttapp (out/target/product/generic/symbols/system/bin/tttapp)
target Strip: tttapp (out/target/product/generic/obj/EXECUTABLES/tttapp_intermediates/tttapp)
Install: out/target/product/generic/system/bin/tttapp
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2#
這樣就表示編譯成功瞭，我們看一下這個對應的執行程序是否已經生成：
[plain]
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2# ls -l out/target/product/generic/system/bin/tttapp
-rwxr-xr-x 1 root root 5524 2013-04-02 11:04 out/target/product/generic/system/bin/tttapp
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2#
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2# ls -l out/target/product/generic/system/bin/tttapp
-rwxr-xr-x 1 root root 5524 2013-04-02 11:04 out/target/product/generic/system/bin/tttapp
root@brantyou-ubuntu:~/workspace/android-4.0.4_r1.2# 這樣就表示生成瞭對應的 可執行程序。
好，現在我們把這個生成的 tttapp 程序拷貝到 SD卡上，然後放到板子上去執行。
我這裡是放到瞭U盤上面，從U盤中把tttapp 拷貝到板子上的/data目錄中去：
[plain]
root@android:/mnt # ls usb
D3GOther.exe
EBOOT.bin
EBOOT.nb0
IRDA_X.exe
LOST.DIR
MapTools.exe
NK.BIN
NK_2G.bin
NK_3G.bin
NK_3G_y.BIN
NK_src.bin
RFIDForProduce.exe
RFIDTest.exe
RFID_X.exe
STEPLDR.bin
STEPLDR.nb0
SwitchTools.exe
WINCE 6软件
android-samsung-dev_20110830.tar.gz
barscan.exe
bbk
hello
htcbjwdm.inf
tttapp
ubuntu-11.10-desktop-i386.iso
凯立德地图
机身å·ç (MC60端).exe
root@android:/mnt #
root@android:/mnt # ls
asec
ext_sd
obb
sdcard
secure
usb
root@android:/mnt # cd usb/
root@android:/mnt/usb # ls
D3GOther.exe
EBOOT.bin
EBOOT.nb0
IRDA_X.exe
LOST.DIR
MapTools.exe
NK.BIN
NK_2G.bin
NK_3G.bin
NK_3G_y.BIN
NK_src.bin
RFIDForProduce.exe
RFIDTest.exe
RFID_X.exe
STEPLDR.bin
STEPLDR.nb0
SwitchTools.exe
WINCE 6软件
android-samsung-dev_20110830.tar.gz
barscan.exe
bbk
hello
htcbjwdm.inf
tttapp
ubuntu-11.10-desktop-i386.iso
凯立德地图
æ [ttt]: ttt_read().
[ttt]: ttt_write().
[ttt]: ttt_read().
[ttt]: ttt_release().
Read original value:
123.
Write value 100 to /dev/ttt.
Read the value again:
100.
D3GOther.exe
EBOOT.bin
EBOOT.nb0
IRDA_X.exe
LOST.DIR
MapTools.exe
NK.BIN
NK_2G.bin
NK_3G.bin
NK_3G_y.BIN
NK_src.bin
RFIDForProduce.exe
RFIDTest.exe
RFID_X.exe
STEPLDR.bin
STEPLDR.nb0
SwitchTools.exe
WINCE 6软件
android-samsung-dev_20110830.tar.gz
barscan.exe
bbk
hello
htcbjwdm.inf
tttapp
ubuntu-11.10-desktop-i386.iso
凯立德地图
D3GOther.exe
EBOOT.bin
EBOOT.nb0
IRDA_X.exe
LOST.DIR
MapTools.exe
NK.BIN
NK_2G.bin
NK_3G.bin
NK_3G_y.BIN
NK_src.bin
RFIDForProduce.exe
RFIDTest.exe
RFID_X.exe
STEPLDR.bin
STEPLDR.nb0
SwitchTools.exe
WINCE 6软件
android-samsung-dev_20110830.tar.gz
barscan.exe
bbk
hello
htcbjwdm.inf
tttapp
[ttt]: ttt_open().
[ttt]: ttt_read().
[ttt]: ttt_write().
[ttt]: ttt_read().
[ttt]: ttt_release().
Read original value:
123.
Write value 100 to /dev/ttt.
Read the value again:
100.
拷貝的過程中，出現瞭一些情況，cp指令不可用，使用cat指令就OK瞭。由上面最後的幾句信息，可以看出這個C程序成功瞭。測試驅動OK瞭。
到此，驅動的測試就完瞭。下一篇將會介紹編寫對應的HAL硬件抽象層來訪問內核驅動