Maxim Integrated 73M1822/73M1922 Control Module - Manual (Page 34)

73M1822/73M1922 Control Module User Guide UG_1x22_053
34 Rev. 1.0
6.2.6 M1X22_ERROR_CODE_GET
Description
This IOCTL returns the error code of the last IOCTL command. The driver records only the last error
code and applicable to device and channel descriptor.
#define M1X22_ERROR_CODE_GET _IOWR(0xA4,0xB2,unsigned int)
Prototype
int ioctl (
int dev_fd,
int M1X22_ERROR_CODE_GET,
unsigned long param );
Parameters
Data Type Name Description
int dev_fd/chan_fd Device or Channel descriptor.
int M1X22_ERROR_CODE_GET I/O control identifier for this operation.
unsigned long param Pointer to the error code of type unsigned int.
Return Values
Data Type Description
int 0 – Successful.
-EFAULT – Failed to retrieve the error code.