does not map back to the address

[~]$ ssh 192.168.0.233
Address 192.168.0.233 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Last login: Thu Nov 26 10:29:29 2009 from 192.168.0.235


用 ssh 时,经常看到这样的警告信息,挺闹心的,因为DNS服务器把 192.168.0.x 的地址都反向解析成 localhost ,而DNS服务器不是咱们自己的,没办法改。

找到一种办法,编辑 ssh 客户端的 /etc/hosts 文件,把出问题的 IP 地址和主机名加进去,就不会报这样的错了。
### 24C64 EEPROM Page Write Algorithm Implementation and Explanation Page writing to the 24C64 EEPROM involves a specific procedure due to hardware limitations where data can only be written in pages, not byte by byte without restrictions. Each page of the 24C64 consists of eight bytes[^1]. Writing operations must respect these boundaries. To implement the page write algorithm effectively: #### Determining Current Position within Page Before initiating any write operation, it is crucial to determine the current position relative to the start address provided for writing. This ensures that no more than one page's worth of data (eight bytes) will overflow into another page unintentionally during continuous writes. If an attempt is made to write beyond the boundary of a single page, two separate I²C transactions are required—one completing the first page and another starting at the beginning of the next page with remaining data. #### Buffer Preparation Prepare a buffer containing all the data intended for writing. Ensure this does not exceed the maximum capacity allowed per transaction as defined by both device specifications and application requirements. For example, when preparing buffers: ```c uint8_t buffer[8]; // Maximum size based on page length. // Fill buffer with desired values... ``` #### Handling Partial Pages When dealing with partial pages or situations where less than full-page content needs updating, special care should be taken. First read existing contents from target locations before modifying them partially then rewriting back entirely ensuring integrity across transitions between old/new states. This process might look like so in pseudocode form: ```pseudocode if ((startAddress % PAGE_SIZE != 0) || (numBytes < PAGE_SIZE)) { ReadExistingData(); ModifyBufferWithNewData(); } WriteBufferDataViaI2C(buffer); ``` In summary, implementing a robust page-write function requires understanding how addresses map onto physical memory structures inside the chip along with careful management around edge cases involving incomplete pages or spanning multiple ones. --related questions-- 1. How do timing constraints affect communication speed over I2C while performing page writes? 2. What measures ensure reliability during power loss events specifically concerning EEPROMs? 3. Can you provide examples demonstrating error handling mechanisms used within I2C communications routines? 4. In what scenarios would reading-modifying-writing cycles become necessary instead of direct writes?
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