Android在Fastboot裡添加命令

fastboot 是android 默認的一種debug 方法,它的好處是在進入linux kernel 之前
即可操作。
默認fastboot 支持的命令:

usage: fastboot [  ] 
commands:
update  reflash device from
update.zip
flashall flash boot
+ recovery + system
flash  [  ] write a file to a flash
partition
erase  erase a flash
partition
format  format a flash
partition
getvar  display a
bootloader variable
boot  [  ] download and boot kernel
flash:raw boot  [  ] create bootimage and flash it
devices list all
connected devices
continue continue
with autoboot
reboot reboot
device normally
reboot-bootloader reboot device
into bootloader
help show this
help message
options:
-w erase userdata and cache (and
format if supported by partition type)
-u do not first erase partition
before formatting
-s  specify device serial number or path to
device port
-l with "devices", lists device
paths
-p  specify product name
-c  override kernel commandline
-i  specify a custom USB vendor id
-b  specify a custom kernel base
address
-n  specify the nand page size.
default: 2048
-S [K|M|G] automatically sparse files
greater than size. 0 to disable

fastboot 提供了擴展的命令符號

fastboot oem command args

下面以fastboot oem hello test 來說明如何擴展
(1).在bootable/bootloader/lk/app/mt_boot/fastboot.c
的fastboot_init 函數中添加一個新的register

//第一個參數是命令的名稱
//第二個參數是命令的執行函數
//第三個參數是在security IC 中是否還提供此命令
fastboot_register("oem hello", cmd_oem_hello, FALSE);

(2). 實現cmd_oem_hello 函數
void cmd_oem_hello(const char *arg, void *data, unsigned size) {

//注意args 是以command 結束開始,即" args"
if(!strncmp(arg, " OK", strlen(" OK"))){
fastboot_okey("OK");
}else{
fastboot_fail("Not OK");
}
}

(3). 與PC 端交互
您可以使用下面已經定義好的三個函數與PC 端交互

fastboot_okey(const char* result);
fastboot_fail(const char* reason);
fastboot_info(const char* reason); 

注意這三個打印字符串的長度都不能超過64-1-4 = 59 個字

轉載請注明出處：周木水的CSDN博客 http://blog.csdn.net/zhoumushui

我的GitHub：周木水的GitHub https://github.com/zhoumushui