关于刷Sylvain/burst_ind分支的一些问题解答

Sylvain/burst_ind分支是网上说的比较多的带sniffer功能的分支，但是编译完无法刷固件

关于以上问题。相信很多朋友碰到过。但是国内没有人分享相关的经验。在这里我分享下我的经验。

http://bb.osmocom.org/trac/wiki/Hardware/CP210xTutorial

除了做以上步骤以外，官网提示是这样的。

First of all you need to download and unpack the lastest version of cp210x-program, an open-source tool replacing the proprietary windows-only tool from SiLabs (see application note AN205 if you want to mess with that).

To make sure cp210x-program will be the only one talking to the converter, unload the kernel module:

首先，你需要下载最新版本的CP210X驱动程序并解压，然后执行如下命令：

sudo rmmod cp210x

After that, perform a dry-run to see everything is okay:【未改波特率前测试效果】

sudo ./cp210x-program

The tool should output the device-string of the converter, some other information, and a baudrate table with the following default entries:

[baudrate table][...] 921600 = FFE6, FFF6, 1 #  923077 Baud, 20 us[...] 460800 = FFCC, FFEC, 1 #  461538 Baud, 40 us[...] 230400 = FF98, FFD9, 1 #  230769 Baud, 78 us[...] 115200 = FF30, FFB2, 1 #  115385 Baud, 156 us[...]

Okay, now to the real thing: create a backup of the EEPROM:

sudo ./cp210x-program -f eeprom.hex

The next step is to program the modified, non-standard baudrates: （这个才是最关键的，改波特率）

sudo ./cp210x-program -p -F eeprom.hex -w --set-baudrate 812500:FFE2,FFF4,1 --set-baudrate 406250:FFC5,FFE9,1 --set-baudrate 203125:FF8A,FFD3,1

Check if the entries have been written successfully:【改完波特率后测试效果】

sudo ./cp210x-program

You should see the following entries:

[baudrate table][...] 812500 = FFE2, FFF4, 1 #  800000 Baud, 24 us[...] 406250 = FFC5, FFE9, 1 #  406780 Baud, 46 us[...] 203125 = FF8A, FFD3, 1 #  203390 Baud, 90 us[...] 115200 = FF30, FFB2, 1 #  115385 Baud, 156 us[...]

Replug the converter and you're done.

Using burst_ind

If you want to use the burst_ind branch with a CP210x converter, you need to add the following define in osmocon.c:

需要修改osmocom-bb/src/host/osmocon/osmocon.c,文件中添加定义

#define I_HAVE_A_CP210x

否则会出现“Unable to set custom baudrate, please use appropriate cable"执行完上述的步骤后。在去刷Sylvain/burst_ind分支固件就能看到成功刷进手机了