#include <revolution/kpad.h> #define KPAD_READ_ERR_NONE 0 #define KPAD_READ_ERR_NO_DATA -1 #define KPAD_READ_ERR_NO_CONTROLLER -2 #define KPAD_READ_ERR_SETUP -3 #define KPAD_READ_ERR_LOCKED -4 #define KPAD_READ_ERR_INIT -5 s32 KPADReadEx( s32 chan, KPADStatus samplingBufs[], u32 length, s32 *err );
| chan | One of the WPAD_CHANn values. |
|---|---|
| samplingBufs | Pointer to the KPADStatus structure. |
| length | Maximum number of data sets to store. If you use the KPADInit function, this cannot exceed KPAD_RING_BUFS. If you use the KPADInitEx function, this value cannot exceed the sum of KPAD_RING_BUFS and one-quarter the array length passed to the KPADInitEx function. |
| err | Pointer to the variable for passing the error code. |
Returns the number of data sets actually stored.
This function loads data of the KPADStatus structure type for each controller channel. We have assumed that this function will be called for each game frame. The buffer specified by the argument stores, from newest to oldest, the data sampled from the time of the previous call to the time of the current call. (In other words, the newest data is always stored at the beginning of the buffer.) However, in the case of button information only, if the button processing method obtained using the KPADGetButtonProcMode function is KPAD_BUTTON_PROC_MODE_LOOSE, only the most recent values are accessed when the KPADRead or KPADReadEx functions are called, and those values are copied into all the current-frame sampling buffers.
Note, however, that the buffer specified by samplingBufs may be used internally as a work area. Because of this, even if there is no data, the contents of the buffer might be rewritten; still, even in this case, the newest data will not change.
The following error codes are passed to err:
| KPAD_READ_ERR_NONE | There is sampling data. |
|---|---|
| KPAD_READ_ERR_NO_DATA | No sampling data. |
| KPAD_READ_ERR_NO_CONTROLLER | The Wii Remote is not connected. |
| KPAD_READ_ERR_SETUP | WPAD library initialization is not complete. |
| KPAD_READ_ERR_LOCKED | Duplicate calls caused failure to obtain permission to process. |
| KPAD_READ_ERR_INIT | The KPADInit function (or the KPADInitEx function) has not been called. |
2008/06/13 Revised the explanation of length. Added explanation of the differences caused by different button processing methods. Added mention that the newest data values are guaranteed protected.
2008/06/03 Initial version.
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