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我正在尝试为似乎与典型设备略有不同的 I2C 设备编写 Linux 驱动程序。具体来说，我需要连续读取两个字节，中间不发送停止位，如下所示：

[S] [Slave Addr | 0] [A] [Reg Addr 1] [A] [Sr] [Slave Addr | 1] [Data Byte 1] [NA]  
[Sr][Slave Addr | 0] [A] [Reg Addr 2] [A] [Sr] [Slave Addr | 1] [Data Byte 2] [NA] [P]

我已经研究了几种方法，包括 i2c_transfer()、i2c_master_send() 和 i2c_master_recv()，但我不确定它们是否支持这些。有没有什么方法可以直接使用这些功能而不是非常痛苦？到目前为止，我发现的文档对此事还不是很清楚。

EDIT#1：添加符号键使其可读。礼貌http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/i2c/i2c-protocol

 Key to symbols
==============

S     (1 bit) : Start bit
P     (1 bit) : Stop bit
Rd/Wr (1 bit) : Read/Write bit. Rd equals 1, Wr equals 0.
A, NA (1 bit) : Accept and reverse accept bit. 
Addr  (7 bits): I2C 7 bit address. Note that this can be expanded as usual to 
                get a 10 bit I2C address.
Comm  (8 bits): Command byte, a data byte which often selects a register on
                the device.
Data  (8 bits): A plain data byte. Sometimes, I write DataLow, DataHigh
            for 16 bit data.
Count (8 bits): A data byte containing the length of a block operation.
[..]: Data sent by I2C device, as opposed to data sent by the host adapter.
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1 回答 1

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在同一读/写操作中的字节之间不发送停止位。i2c_master_recv 可能是您需要的。

于 2012-07-21T21:07:41.777 回答