Synopsis
int sub_i2c_read( sub_handle hndl, 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
•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