制作升级包
【step 1】Prepare
mydroid$ export TARGET_BOARD_PLATFORM=r8a77965
mydroid$ source build/envsetup.sh
mydroid$ lunch salvator-userdebug
mydroid$ make -j3
…...
[100% 66/66] Target vbmeta image: out/target/product/salvator/vbmeta.img
#### build completed successfully (06:23 (mm:ss)) ####
【step 2】make OTA package
mydroid$ make otapackage #——会生成sd卡用的全部系统升级包
(or, mydroid$ make full_otapackage)
…...
[100% 75/75] Package OTA: out/target/product/salvator/salvator-ota-eng.dongtz.zip
…...
running: java -Xmx2048m -Djava.library.path=out/host/linux-x86/lib64 -jar out/host/linux-x86/framework/signapk.jar -w build/target/product/security/testkey.x509.pem build/target/product/security/testkey.pk8 /tmp/tmpqPUopK.zip out/target/product/salvator/salvator-ota-eng.dongtz.zip
done.
#### build completed successfully (06:28 (mm:ss)) ####
【step 3】Edit code
修改代码以后。
【step 4】re-make
mydroid$ make #——重新编译
mydroid$ make otapackage #——重新生产升级包
mydroid$ ./build/tools/releasetools/ota_from_target_files -i out/target/product/salvator/salvator-ota-eng.dongtz.zip out/target/product/salvator/salvator-ota-eng.dongtz.original.zip out/target/product/salvator/ota_diff_package.zip #---这里有错误发生，也许还有bug，导致不能生成差分包
Traceback (most recent call last):
File "./build/tools/releasetools/ota_from_target_files", line 1996, in <module>
main(sys.argv[1:])
File "./build/tools/releasetools/ota_from_target_files", line 1887, in main
OPTIONS.info_dict = common.LoadInfoDict(input_zip)
File "/home/dongtz/work/android/android_v530_m3n/RENESAS_RCH3M3M3N_Android_P_ReleaseNote_2019_08E/mydroid/build/make/tools/releasetools/common.py", line 169, in LoadInfoDict
raise ValueError("can't find META/misc_info.txt in input target-files")
ValueError: can't find META/misc_info.txt in input target-files
用升级包升级
【方法1 】通过recovery实现
通过recovery升级的功能进行实现的。
Recovery提供的功能如下，使用apply update from sdcard功能即可升级OTA包。
【方法2 】通过adb实现
可以通过adbroot/adb remount/adb push指令实现，但是需要连接到电脑PC端，且支持adb才行。
$ ./adb push -p /home/m3n_imgs/salvator-ota-eng.dongtz.zip /data/update.zip
$ ./adb shell uncrypt /data/update.zip /cache/recovery/block.map #---注意：要等待一段时间，直到命令执行退出…，然后在执行如下命令；
$ ./adb shell "echo \"--update_package=@/cache/recovery/block.map\" > /cache/recovery/command"
$ ./adb reboot recovery #---注意：要多等待一段时间，直到升级完成。
......
[ 2.969568] read strings
[ 2.972384] android.hardware.health@2.0-impl: wakealarm_init: timerfd_create failed
[ 2.982487] audit: type=1400 audit(1576201012.192:7): avc: denied { wake_alarm } for pid=1400 comm="charger" capability=35 scontext=u:r:charger:s0 tcontext=u:r:charger:s0 tclass=capability2 permissive=0
[ 2.983643] healthd: battery none chg= #---这里要一直等待，不要断电，直到出现下面的log信息提示
[ 123.044678] init: Received sys.powerctl='reboot,' from pid: 1401 (/sbin/recovery)
[ 123.052392] init: Clear action queue and start shutdown trigger
[ 123.058413] init: processing action (shutdown_done) from (<Builtin Action>:0)
[ 123.065652] init: Reboot start, reason: reboot,, rebootTarget:
[ 123.071825] init: Shutdown timeout: 6000 ms
[ 123.076064] init: terminating init services
[ 123.080274] init: Sending signal 15 to service 'recovery' (pid 1401) process group...
[ 123.089378] init: Sending signal 15 to service 'charger' (pid 1400) process group...
[ 123.097858] init: Sending signal 15 to service 'tee_supplicant' (pid 1398) process group...
[ 123.106414] init: Sending signal 15 to service 'ueventd' (pid 1064) process group...
[ 126.210034] reboot: Restarting system with command ''
NOTICE: R-Car M3N Initial Program Loader(CR7)
NOTICE: Initial Program Loader (Rev.2.0.7)
NOTICE: Built : 13:05:37, Apr 1 2021
NOTICE: PRR is R-Car M3N Ver.1.1