Embedded Application Programming Interface - picmg
Embedded Application Programming Interface - picmg
Embedded Application Programming Interface - picmg
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7.7.2 Parameters<br />
Id<br />
__IN See '7.1.1 I2C Bus Ids' on page 32<br />
Addr<br />
Cmd<br />
__IN Encoded 7/10 Bit I2C Device Address.<br />
__IN Encoded I2C Device Command / Index.<br />
pBuffer<br />
__OUT Pointer to a buffer that receives the read data. This parameter can be NULL if the data is not<br />
required.<br />
BufLen<br />
__IN Size, in bytes, of the buffer pointed to by the pBuffer parameter.<br />
If the buffer specified by pBuffer parameter is not large enough to hold the data, the function returns<br />
the value EAPI_STATUS_MORE_DATA<br />
ByteCnt<br />
__IN Size, in bytes, of data to be read<br />
7.7.3 Return Status Codes<br />
Condition<br />
Library Uninitialized<br />
pBuffer==NULL<br />
ByteCnt==0<br />
BufLen==0<br />
Unknown Id<br />
ByteCnt>pMaxBlkLen<br />
Bus Busy SDA/SDC low<br />
Arbitration Error/Collision Error<br />
On Write 1 write cycle<br />
SDA Remains low<br />
Timeout due to clock stretching<br />
startNak<br />
startNak<br />
startAckNak<br />
startAckNak<br />
startAckNak<br />
ByteCnt>BufLen<br />
Return Value<br />
EAPI_STATUS_NOT_INITIALIZED<br />
EAPI_STATUS_INVALID_PARAMETER<br />
EAPI_STATUS_INVALID_PARAMETER<br />
EAPI_STATUS_INVALID_PARAMETER<br />
EAPI_STATUS_UNSUPPORTED<br />
EAPI_STATUS_INVALID_BLOCK_LENGTH<br />
EAPI_STATUS_BUSY_COLLISION<br />
EAPI_STATUS_BUSY_COLLISION<br />
EAPI_STATUS_HW_TIMEOUT<br />
EAPI_STATUS_NOT_FOUND<br />
EAPI_STATUS_NOT_FOUND<br />
EAPI_STATUS_WRITE_ERROR Or<br />
EAPI_STATUS_NOT_FOUND<br />
EAPI_STATUS_WRITE_ERROR<br />
EAPI_STATUS_WRITE_ERROR<br />
EAPI_STATUS_MORE_DATA<br />
... see 2.3 Status Codes on page 16<br />
Success<br />
EAPI_STATUS_SUCCESS<br />
PICMG® EAPI R1.0, August 8, 2010 page 39 of 83
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