sub_bb_i2c_read

Synopsis

int sub_bb_i2c_read( sub_handle hndl, int channel, int sa, int ma, int ma_sz,

                                                                         char* buf, int sz )

Perform complete I2C master read transaction with optional memory address write. Transaction will have following format:

If ma_sz is zero "Memory Address Write" stage will be skipped.

Function has no limitation of the read data size - sz parameter. However internal organization of the I2C slave device being read should be considered.  

Parameters

•channel - Bit-bang I2C Master channel 0..3

•sa - Slave Address

•ma - Memory Address. Will be shifted out in "Memory Address Write" stage MSB first

•ma_sz - Memory Address size bytes

•buf - Buffer to store read data

•sz - Read data size bytes.

Return value

On success function returns 0. Otherwise error code.

See also

Error Codes, I2C Status

Compatibility