C-SCOPE R1 Instalační příručka stáhnout pdf (Strana 92)

API functions86

4.58

ps4000aStreamingReady

typedef void (CALLBACK *ps4000aStreamingReady)

(

int16_t handle,

int32_t noOfSamples,

uint32_t startIndex,

int16_t overflow,

uint32_t triggerAt,

int16_t triggered,

int16_t autoStop,

void * pParameter

)

This callback function is part of your application. You register it with the PicoScope

4000 Series driver using ps4000aGetStreamingLatestValues, and the driver calls

it back when streaming-mode data is ready. You can then download the data using

the ps4000aGetValuesAsync function.

Applicability

Streaming mode only

Arguments

handle, the handle of the device returning the samples.

noOfSamples, the number of samples to collect.

startIndex, an index to the first valid sample in the buffer. This

is the buffer that was previously passed to

ps4000aSetDataBuffer.

overflow, returns a set of flags that indicate whether an

overvoltage has occurred on any of the channels. It is a bit pattern

with bit 0 denoting Channel A.

triggerAt, an index to the buffer indicating the location of the

trigger point. This parameter is valid only when triggered is non-

zero.

triggered, a flag indicating whether a trigger occurred. If non-

zero, a trigger occurred at the location indicated by triggerAt.

autoStop, the flag that was set in the call to

ps4000aRunStreaming.

pParameter, a void pointer passed from

ps4000aGetStreamingLatestValues. The callback function can

write to this location to send any data, such as a status flag, back to

the application.

Returns

nothing

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C-SCOPE R1 Instalační příručka Strana 92