ADC library

Enumerations
enum	adc_channel_t {   ADC0 = ((0x240 / 4) + 1) , ADC1 = ((0x240 / 4) + 9) , ADC2 = ((0x240 / 4) + 6) , ADC3 = ((0x240 / 4) + 15) ,   ADC4 = ((0x240 / 4) + 5) , ADC5 = ((0x240 / 4) + 13) }

Functions
bool	initialized_adc (void)
void	adc_init (void)
void	adc_destroy (void)
double	adc_read_channel (adc_channel_t channel)
uint32_t	adc_read_channel_raw (adc_channel_t channel)

Detailed Description

Functions to use the Analog to Digital Conversion (ADC) of analog pins (A0..A5 on the PYNQ board).

Note that GPIO numbering (IO_A0..IO_A5) used in gpio.h and pinmap.h is different from A0..A5.

Enumeration Type Documentation

adc_channel_t

enum adc_channel_t

Enumerate the different available ADC channels.

Enumerator
ADC0	ADC channel for pin IO_A0
ADC1	ADC channel for pin IO_A1
ADC2	ADC channel for pin IO_A2
ADC3	ADC channel for pin IO_A3
ADC4	ADC channel for pin IO_A4
ADC5	ADC channel for pin IO_A5

Definition at line 43 of file adc.h.

Function Documentation

adc_destroy()

void adc_destroy ( void  )

extern

De-initialize the ADC library and free up the used memory in the shared memory space.

Definition at line 80 of file adc.c.

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adc_init()

void adc_init ( void  )

extern

Initialization of the ADC library.

Definition at line 78 of file adc.c.

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adc_read_channel()

double adc_read_channel ( adc_channel_t  channel )

extern

Parameters

channel

The channel to read the analog value from. Read ADC channel #channel and return the read out voltage.

Returns

a value between 0.0 and 3.3V.

Warning

Fails with program exit when channel is outside valid range or has not been initialized..

Definition at line 87 of file adc.c.

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adc_read_channel_raw()

uint32_t adc_read_channel_raw ( adc_channel_t  channel )

extern

Parameters

channel

The channel to read the analog value from. Read ADC channel #channel and return the raw value.

Returns

a value between 0 and 65535.

Warning

Fails with program exit when channel is outside valid range.

Definition at line 97 of file adc.c.

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initialized_adc()

bool initialized_adc ( void  )

extern

Check if ADC has been initialized.

Returns

True when initialized, false otherwise.

Definition at line 57 of file adc.c.

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