viPeek8, viPeek16, viPeek32, and viPeek64
This section contains information specific to the Windows product.
Syntax
viPeek8(ViSession vi, ViAddr addr, ViPUInt8 val8);
viPeek16(ViSession vi, ViAddr addr, ViPUInt16 val16);
viPeek32(ViSession vi, ViAddr addr, ViPUInt32 val32);
viPeek64(ViSession vi, ViAddr addr, ViPUInt64 val64); [VISA 4.0 and later]
Description
This function reads an 8-bit, 16-bit, 32-bit, or 64-bit value from the address location specified in addr. The address must be a valid memory address in the current process mapped by a previous viMapAddress call.
|
ViAddr is defined as a void *. To do pointer arithmetic, you must cast this to an appropriate type (ViUInt8, ViUInt16, ViUInt32, or ViUInt64). Then, be sure the offset is correct for the type of pointer you are using. For example, (ViUInt8 *)addr + 4 points to the same location as (ViUInt16 *)addr + 2. |
Parameters
|
Name |
Dir |
Type |
Description |
|---|---|---|---|
|
vi |
IN |
ViSession |
Unique logical identifier to a session. |
|
addr |
IN |
ViAddr |
Specifies the source address to read the value. |
|
val8, val16, val32, or val64 |
OUT |
ViPUInt8, ViPUInt16, ViPUInt32, |
Data read from bus (8 bits for viPeek8, 16 bits for viPeek16, 32 bits for viPeek32, and 64 bits for viPeek64). |
Return Values
None
See Also
viPoke8, viPoke16, viPoke32, viPoke64, viMapAddress, viIn8, viIn16, viIn32 and viIn64