P76v 调试

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1. 淘宝淘了一台二手台电P76v，主控是A13，其伟大之初在于史无前例的使用了LQFP封装，而且市面可见的可以达到GHz主频以上的CPU鲜见LQFP封装！

2. 调试串口引出：打开外壳，拆开电路板，在CPU的反面2个并排的焊盘就是串口的RX和TX脚了，引出来，然后再连接一个底线。

3. 连接PL2303串口线，打开SercureCRT，开机，可以看到启动信息了。

HELLO! BOOT0 is starting!
boot0 version : 1.3.0
dram size =512
Succeed in opening nand flash.
Succeed in reading Boot1 file head.
The size of Boot1 is 0x00036000.
The file stored in 0X00000000 of block 2 is perfect.
Check is correct.
Ready to disable icache.
Succeed in loading Boot1.
Jump to Boot1.
[ 0.137] boot1 version : 1.3.1c
[ 0.137] pmu type = 3
[ 0.138] bat vol = 4031
[ 0.167] axi:ahb:apb=3:2:2
[ 0.167] set dcdc2=1400, clock=1008 successed
[ 0.169] key
[ 0.182] no key found
[ 0.182] flash init start
[ 0.266] flash init finish
[ 0.269] fs init ok
[ 0.271] fattype FAT16
[ 0.271] fs mount ok
[ 0.278] script finish
[ 0.279] power finish
[ 0.289] BootMain start
[ 0.289] 0
[ 0.344] init to usb pc
[ 0.369] pre sys mode
[ 0.369] startup status = -1
[ 0.370] key value = 1
[ 0.372] recovery key high 6, low 4
[ 0.376] unable to find fastboot_key key_max value
[ 0.385] test for multi os boot with display
[ 0.972] show pic finish
[ 0.972] load kernel start
[ 1.001] load kernel successed
[ 1.001] start

U-Boot 2011.09-rc1 (Jun 06 2012 - 09:32:02) Allwinner Technology

CPU: SUNXI Family
Board: A13-EVB
DRAM: 512 MiB
NAND: 3504 MiB
In: serial
Out: serial
Err: serial
--------fastboot partitions--------
-total partitions:9-
-name- -start- -size-
bootloader : 1000000 1000000
env : 2000000 1000000
boot : 3000000 2000000
system : 5000000 20000000
data : 25000000 20000000
misc : 45000000 1000000
recovery : 46000000 2000000
cache : 48000000 10000000
UDISK : 58000000 83000000
-----------------------------------
Hit any key to stop autoboot: 0
sunxi#
sunxi#

4. 手头有全套A13的4.1.1 SDK，已经编译通过，抽空烧录一下。

5. 不过我的最终目的是将这个方案用于linux+qt产品设计。

6.SDK 编译方法：

a. cd lichee

b. ./build.sh -p a13 -k 3.0

c. 编译完成即可得到img烧录文件，一般情况下不会出现什么问题。