#include <nitro/spi.h>
void TP_RequestAutoSamplingStartAsync(
u16 vcount,
u16 frequence,
TPData samplingBufs[],
u16 bufSize );
This function asynchronously issues a request to ARM7 to begin auto sampling touch panel values.
Once this request is accepted, sampling occurs periodically and values are
stored in the array specified by samplingBufs.
The autosampling interval is the uniform interval that data (as set in the frequence argument) is sampled by VAlarm
in one frame based on the value set in vcount. If a user callback is set with TP_SetCallback, notice is given by a
callback each time a value is saved.
After this function clears samplingBufs, the buffer will be used
as a loop buffer. To acquire the index of the last stored data, use TP_GetLatestIndexInAuto.
When autosampling, it is possible that the sampling value for (newest index + 1) will be unexpectedly overwritten by an
interrupt. If you are using the sampling values from one frame all together, you can
avoid this by securing an area that is at least frequence + 1.
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Base Vcount value for auto sampling |
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The number of samples taken during one frame. (MAX 4) |
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The pointer that sets the buffer in which auto sampling
values are stored. At minimum you must secure a region large enough to
contain |
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The size of the buffer that was passed by |
None
In this function, you must confirm whether the request to ARM7 was properly processed.
To obtain the success or failure of the request, you must either first use TP_WaitBusy to wait for completion and then use TP_CheckError, or use an argument in
a user callback.
TP_RequestAutoSamplingStop, TP_GetLatestRawPointInAuto, TP_GetLatestCalibratedPointInAuto, TP_GetLatestIndexInAuto, TP_WaitBusy, TP_CheckError,
TP_RequestAutoSamplingStart
04/21/2004 Initial version