AN3128 datasheet(35/105 Pages) STMICROELECTRONICS

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AN3128

Multi-input embedded GUI library firmware

Doc ID 16918 Rev 5

35/105

4.1.12

NewGraphChart API global function

This kind of object is made up of two axes (X and Y) with the relative values printed to the

side, and a certain number of blue columns representing the real distribution of respective

values. The values are saved in a vector of decimal numbers.

A typical example of the application of this object may be reading the distribution of

measured values concerning changing data.

It is possible to change the values of the vectors through the function “SetGraphChartPoints”

defined in the following pages, therefore easily integrating such an object into the

application.

Figure 13.

GraphChart graphical object

Table 17 describes the NewGraphChart function:

Table 17.

NewGraphChart API function

Function name

NewGraphChart

Function prototype

GL_PageControls_TypeDef* NewGraphChart (char* oName, char* LabelX,

char* LabelY, int16_tdata_points[], GL_uint8_t n_points, GL_bool

Background)

Behavior description

Create and initialize a new GraphChart object (a C structure)

Input parameter {x}

oName: object Name

LabelX: Label for the X axis

LabelY: Label for the Y axis

data_points[]: the array of points to be plotted on the LCD pointer to

function associated to its touch event

n_points: number of points to be plotted

Background: select if black background has to be used. This parameter can

be GL_TRUE or GL_FALSE

Output parameter {x}

None

AN3128 Datasheet(PDF) 35 Page - STMicroelectronics