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76 • C Language Library

7.17 _8112_AD_INT_Start

Description

The function will perform an A/D conversion N times with interrupt data

transfer using the pacer trigger. It takes place in the background which

will not stopped until the Nth conversion has completed or your program

executes the _8112_AD_INT_Stop() function to stop the process. After

executing this function, it is necessary to check the status of the

operation by issuing the 8112_AD_INT_Status() function. The function

can only be performed on an A/D channel with a fixed analog input

range.

Syntax

int _8112_INT_Start( int ad_ch_no, int ad_range,

int irq_ch_no, int count, int

*ad_buffer, unsigned int c1, unsigned int c2)

int _8112pg_INT_Start( int ad_ch_no, int ad_gain,

int irq_ch_no, int count, int

*ad_buffer, unsigned int c1, unsigned int c2)

Argument:

ad_ch_no

: A/D channel number

ad_range

: A/D analog input range, please refer

to section 7.9 for the possible

values.

irq_ch_no: IRQ channel number, used to stop DMA

count:

the number of A/D conversion

ad_buffer:

the start address of the memory buffer

to store the A/D data, the buffer

size must be larger than the number

of A/D conversions.

c1:

the 16-bit timer frequency divider of

timer channel #1

c2:

the 16-bit timer frequency divider of

timer channel #2

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Adlink ACL-8112 Series Manual do Utilizador Página 84