Renesas Single-Chip Microcomputer M38C89T-ADF Bedienungsanleitung PDF herunterladen (Seite 116)

Rev.1.00 May 22 2012

REJ09B0566

4-96

3BLibrary Reference

4 4.2.10 41B10-bit Analog to Digital Converter R_ADC_10_Read

4) R_ADC_10_Read

Synopsis

Read the ADC conversion results.

Prototype bool R_ADC_10_Read(

uint16_t * data1

// Pointer to the buffer where the converted values are to be stored

);

Description

Reads the conversion values for an ADC channel.

[data1]

Specify a pointer to a variable or array where the results shall be stored.

Return value

True if a valid unit is selected; otherwise false.

Category

ADC

Reference

R_ADC_10_Create, R_ADC_10_Control

Remarks • Between 1 and 4 conversion results will be read and stored. The number depends on the settings for

“Input channel selection” and “Scan mode” when R_ADC_10_Create is used to configure the ADC unit.

• The 10-bit data alignment is controlled using the R_ADC_10_Create function.

• Ensure that the buffer is big enough for the requested number of values.

• If no callback function is used, this function waits for the ADI flag to indicate that conversion is complete

before reading the results. If the ADC unit’s control registers are directly modified by the user, this

function may lock up.

Program example

/* PDL definitions */

#include “r_pdl_adc_10.h”

/* PDL device-specific definitions */

#include “r_pdl_definitions.h”

void func(void)

{

uint16_t ADCresult[2];

/* Read the ADC values for channel 2 */

R_ADC_10_Read(

ADCresult

);

}

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Renesas Single-Chip Microcomputer M38C89T-ADF Bedienungsanleitung Seite 116