adc.h File Reference

#include <avr/io.h>
#include <avr/interrupt.h>
#include <zrtos/vfs_plugin.h>
#include <zrtos/types.h>
#include <zrtos/cast.h>
#include <zrtos/binary.h>

Include dependency graph for adc.h:

Go to the source code of this file.

Data Structures
struct	zrtos_vfs_module_avr_adc_t

Macros
#define	ZRTOS_VFS_MODULE_AVR_ADC__CFG_REFERENCE_VOLT   (5.0)

Typedefs
typedef struct zrtos_vfs_module_avr_adc_t	zrtos_vfs_module_avr_adc_t

Enumerations
enum	zrtos_vfs_module_avr_adc_prescaler_t {   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__2 = ZRTOS_BINARY__00000000,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__4 = ZRTOS_BINARY__00000010,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__8 = ZRTOS_BINARY__00000011,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__16 = ZRTOS_BINARY__00000100,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__32 = ZRTOS_BINARY__00000101,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__64 = ZRTOS_BINARY__00000110,   ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__128 = ZRTOS_BINARY__00000111 }
enum	zrtos_vfs_module_avr_adc_vref_t {   ZRTOS_VFS_MODULE_AVR_ADC_VREF__EXTERN = ZRTOS_BINARY__00000000,   ZRTOS_VFS_MODULE_AVR_ADC_VREF__INTERN = ZRTOS_BINARY__01000000,   ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC1 = ZRTOS_BINARY__10000000,   ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC2 = ZRTOS_BINARY__11000000 }

Functions
float	zrtos_vfs_module_avr_adc__to_volt (uint16_t val, float vref)
	ISR (ADC_vect)
zrtos_error_t	zrtos_vfs_module_avr_adc__on_mount (zrtos_vfs_dentry_t *thiz)
zrtos_error_t	zrtos_vfs_module_avr_adc__on_umount (zrtos_vfs_dentry_t *thiz)
zrtos_error_t	zrtos_vfs_module_avr_adc__on_read (zrtos_vfs_file_t *thiz, char *path, void *buf, size_t len, zrtos_vfs_offset_t offset, size_t *out)
	ZRTOS_VFS_PLUGIN__INIT (avr_adc, ZRTOS_VFS_PLUGIN__0_ON_OPEN_DEFAULT() ZRTOS_VFS_PLUGIN__1_ON_CLOSE_DEFAULT() ZRTOS_VFS_PLUGIN__2_ON_MOUNT(zrtos_vfs_module_avr_adc__on_mount) ZRTOS_VFS_PLUGIN__3_ON_UMOUNT(zrtos_vfs_module_avr_adc__on_umount) ZRTOS_VFS_PLUGIN__4_ON_READ(zrtos_vfs_module_avr_adc__on_read) ZRTOS_VFS_PLUGIN__5_ON_WRITE_DEFAULT() ZRTOS_VFS_PLUGIN__6_ON_CAN_READ_DEFAULT() ZRTOS_VFS_PLUGIN__7_ON_CAN_WRITE(zrtos_vfs_plugin__default_can_write_read_only) ZRTOS_VFS_PLUGIN__8_ON_SEEK_DEFAULT() ZRTOS_VFS_PLUGIN__9_ON_IOCTL_DEFAULT())

Variables
zrtos_vfs_module_avr_adc_t	zrtos_vfs_module_avr_adc__data

Macro Definition Documentation

ZRTOS_VFS_MODULE_AVR_ADC__CFG_REFERENCE_VOLT

#define ZRTOS_VFS_MODULE_AVR_ADC__CFG_REFERENCE_VOLT   (5.0)

Definition at line 52 of file adc.h.

Typedef Documentation

zrtos_vfs_module_avr_adc_t

typedef struct zrtos_vfs_module_avr_adc_t zrtos_vfs_module_avr_adc_t

Enumeration Type Documentation

zrtos_vfs_module_avr_adc_prescaler_t

enum zrtos_vfs_module_avr_adc_prescaler_t

Enumerator
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__2
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__4
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__8
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__16
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__32
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__64
ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__128

Definition at line 21 of file adc.h.

            {
     ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__2   = ZRTOS_BINARY__00000000
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__4   = ZRTOS_BINARY__00000010
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__8   = ZRTOS_BINARY__00000011
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__16  = ZRTOS_BINARY__00000100
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__32  = ZRTOS_BINARY__00000101
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__64  = ZRTOS_BINARY__00000110
    ,ZRTOS_VFS_MODULE_AVR_ADC_PRESCALER__128 = ZRTOS_BINARY__00000111
}zrtos_vfs_module_avr_adc_prescaler_t;

zrtos_vfs_module_avr_adc_vref_t

enum zrtos_vfs_module_avr_adc_vref_t

Enumerator
ZRTOS_VFS_MODULE_AVR_ADC_VREF__EXTERN
ZRTOS_VFS_MODULE_AVR_ADC_VREF__INTERN
ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC1
ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC2

Definition at line 31 of file adc.h.

            {
     ZRTOS_VFS_MODULE_AVR_ADC_VREF__EXTERN = ZRTOS_BINARY__00000000
    ,ZRTOS_VFS_MODULE_AVR_ADC_VREF__INTERN = ZRTOS_BINARY__01000000
    ,ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC1  = ZRTOS_BINARY__10000000
    ,ZRTOS_VFS_MODULE_AVR_ADC_VREF__MISC2  = ZRTOS_BINARY__11000000
}zrtos_vfs_module_avr_adc_vref_t;

Function Documentation

ISR()

ISR

(

ADC_vect

)

Definition at line 67 of file adc.h.

             {
    static uint8_t channel = 0;
    uint16_t val = ADCL;
    val |= (ADCH<<8);

    zrtos_vfs_module_avr_adc__data.data[channel] = val;

    channel++;
    if(channel >= ZRTOS_VFS_MODULE_AVR_ADC__CFG_MAX_CHANNEL){
        channel = 0;
    }
    
#ifdef MUX5
    if (channel > 7) {
        ADCSRB |= _BV(MUX5);
        ADMUX = (ADMUX & ~(0x1F)) | ((channel-8) & 0x1F);
    } else {
        ADCSRB &= ~(_BV(MUX5));
        ADMUX = (ADMUX & ~(0x1F)) | (channel & 0x1F);
    }
#else
    ADMUX = (ADMUX & ~(0x1F)) | (channel & 0x1F);
#endif

    ADCSRA |= _BV(ADSC);
}

zrtos_vfs_module_avr_adc__on_mount()

zrtos_error_t zrtos_vfs_module_avr_adc__on_mount

(

zrtos_vfs_dentry_t *

thiz

)

Definition at line 94 of file adc.h.

                                                                          {
    ADMUX = ZRTOS_VFS_MODULE_AVR_ADC__CFG_VREF;
#ifdef MUX5
    ADCSRB &= ~(_BV(MUX5));
#endif
    ADCSRA = _BV(ADEN)
           | _BV(ADSC)
           | _BV(ADIE)
           | ZRTOS_VFS_MODULE_AVR_ADC__CFG_PRESCALER
    ;
    return ZRTOS_ERROR__SUCCESS;
}

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zrtos_vfs_module_avr_adc__on_read()

zrtos_error_t zrtos_vfs_module_avr_adc__on_read	(	zrtos_vfs_file_t *	thiz,
		char *	path,
		void *	buf,
		size_t	len,
		zrtos_vfs_offset_t	offset,
		size_t *	out
	)

Definition at line 112 of file adc.h.

 {
    zrtos_error_t ret = ZRTOS_ERROR__FAULT;
    size_t start_offset = (size_t)offset;
    size_t channel = start_offset/sizeof(float);

    if(len != sizeof(float)
    ||(start_offset % sizeof(float)) != 0){
        ret = ZRTOS_ERROR__INVAL;
    }else if(channel < ZRTOS_VFS_MODULE_AVR_ADC__CFG_MAX_CHANNEL){
        float val = zrtos_vfs_module_avr_adc__to_volt(
             zrtos_vfs_module_avr_adc__data.data[channel]
            ,ZRTOS_VFS_MODULE_AVR_ADC__CFG_REFERENCE_VOLT
        );

        zrtos_mem__cpy(buf,&val,sizeof(float));

        ret = ZRTOS_ERROR__SUCCESS;
    }

    return ret;
}

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zrtos_vfs_module_avr_adc__on_umount()

zrtos_error_t zrtos_vfs_module_avr_adc__on_umount

(

zrtos_vfs_dentry_t *

thiz

)

Definition at line 107 of file adc.h.

                                                                           {
    ADCSRA = 0;
    return ZRTOS_ERROR__SUCCESS;
}

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zrtos_vfs_module_avr_adc__to_volt()

float zrtos_vfs_module_avr_adc__to_volt	(	uint16_t	val,
		float	vref
	)

Definition at line 63 of file adc.h.

                                                                {
    return (((float)val) * vref) / 1024.0;
}

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ZRTOS_VFS_PLUGIN__INIT()

ZRTOS_VFS_PLUGIN__INIT	(	avr_adc	,
		ZRTOS_VFS_PLUGIN__0_ON_OPEN_DEFAULT() ZRTOS_VFS_PLUGIN__1_ON_CLOSE_DEFAULT() ZRTOS_VFS_PLUGIN__2_ON_MOUNT(zrtos_vfs_module_avr_adc__on_mount) ZRTOS_VFS_PLUGIN__3_ON_UMOUNT(zrtos_vfs_module_avr_adc__on_umount) ZRTOS_VFS_PLUGIN__4_ON_READ(zrtos_vfs_module_avr_adc__on_read) ZRTOS_VFS_PLUGIN__5_ON_WRITE_DEFAULT() ZRTOS_VFS_PLUGIN__6_ON_CAN_READ_DEFAULT() ZRTOS_VFS_PLUGIN__7_ON_CAN_WRITE(zrtos_vfs_plugin__default_can_write_read_only) ZRTOS_VFS_PLUGIN__8_ON_SEEK_DEFAULT() ZRTOS_VFS_PLUGIN__9_ON_IOCTL_DEFAULT()
	)

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Variable Documentation

zrtos_vfs_module_avr_adc__data

zrtos_vfs_module_avr_adc_t zrtos_vfs_module_avr_adc__data

Definition at line 61 of file adc.h.