97 lines
2.2 KiB
Markdown
97 lines
2.2 KiB
Markdown
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由网上开源Ymodem代码修改而来，根据与服务器的通信协议以及传感器的协议做出以下修改：
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1、定期查询version文件中的版本号version文件由update-engine工程中的updata进程负责下载
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2、定期向服务器查询当前传感器的版本号，并于version中的版本号做对比
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3、版本不一致，则进行升级
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4、根据与传感器的协议添加了升级失败时的失败代码的处理
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以下时原工程的readme内容，有些方法可能失效：
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# ymodem
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linux c ymodem
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### 在调用receive/send时,需要先设置好struct ymodem的几个回调函数.如ymodem_test中.
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### help
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```
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/userdata/test # ./ymodem -h
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Usage : ./ymodem [options]
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options:
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eg send Ymodem: ./ymodem -d /dev/ttyS0 -s /demo/bin/SE-app2.bin
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eg receive Ymodem: ./ymodem -d /dev/ttyUSB0
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-d <device name> device path.设置设备名,默认/dev/ttyUSB0.
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-s <file name> send Ymodem, receiving mode if not set.发送文件,如果不选,默认为接收文件
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-t <timeout> Set getchar timeout,def:10(1s), 1=100ms.设置getchar超时,1为100毫秒,默认10=>1s.
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--help display specific types of command line options.
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```
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### recevice file
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```
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/userdata/test # ./ymodem -d /dev/ttyUSB0
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dev path: /dev/ttyUSB0
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open dev: /dev/ttyUSB0
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Receice Ymodem!
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C
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C
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C
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SOH 00 FF Data[128] CRC CRC
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ACK
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C
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file name : xymodem.pdf, size : 53245
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STX 01 FE Data[1024] CRC CRC
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ACK
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STX 02 FD Data[1024] CRC CRC
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ACK
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.
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.
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.
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STX 33 CC Data[1024] CRC CRC
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ACK
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STX 34 CB Data[1024] CRC CRC
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ACK
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EOT
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NAK
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EOT
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ACK
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C
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SOH 00 FF Data[128] CRC CRC
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ACK
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Recevice complete!
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file: xymodem.pdf, size: 53245
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/userdata/test #
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```
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### send file
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```
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/userdata/test #
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/userdata/test # ./ymodem -d /dev/ttyUSB0 -s xymodem.pdf
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dev path: /dev/ttyUSB0
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send file: xymodem.pdf.
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open dev: /dev/ttyUSB0
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Send Ymodem! file: xymodem.pdf
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CAN
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CAN
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C
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file name: xymodem.pdf, size: 53245
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SOH 00 FF Data[128] CRC CRC
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ACK
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C
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STX 01 FE Data[1024] CRC CRC
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ACK
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STX 02 FD Data[1024] CRC CRC
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ACK
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.
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.
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.
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STX 33 CC Data[1024] CRC CRC
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ACK
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STX 34 CB Data[1024] CRC CRC
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ACK
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EOT
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NAK
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EOT
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ACK
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C
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SOH 00 FF Data[128] CRC CRC
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ACK
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Transfer complete!
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```
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