File: adc.h

package info (click to toggle)
simulavr 0.1.2.2-6.1
  • links: PTS
  • area: main
  • in suites: lenny, squeeze
  • size: 2,756 kB
  • ctags: 3,179
  • sloc: ansic: 19,987; sh: 3,623; python: 3,528; makefile: 406; asm: 308; yacc: 145; lex: 48
file content (176 lines) | stat: -rw-r--r-- 5,944 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
 * $Id: adc.h,v 1.4 2004/03/13 19:55:34 troth Exp $
 *
 ****************************************************************************
 *
 * simulavr - A simulator for the Atmel AVR family of microcontrollers.
 * Copyright (C) 2003  Keith Gudger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 ****************************************************************************
 */

#ifndef ADC_H
#define ADC_H

/****************************************************************************\
 *
 * ADCInter_T(VDevice) : ADC Interrupt and Control Register
 *
\****************************************************************************/

enum _adc_intr_constants
{
    ADC_INTR_BASE_A = 0x26,     /* base address for vdev */
    ADC_INTR_BASE_U = 0x27,     /* base address for vdev */
    ADC_INTR_SIZE = 2,          /* SPCR, SPSR */

    ADC_INTR_ADCSR_ADDR = 0,
    ADC_INTR_ADMUX_ADDR = 1,
};

typedef enum
{
    bit_ADPS0 = 0,              /* Clock Rate Select 0   */
    bit_ADPS1 = 1,              /* Clock Rate Select 1   */
    bit_ADPS2 = 2,              /* Clock Rate Select 1   */
    bit_ADIE = 3,               /* ADC Interrupt Enable  */
    bit_ADIF = 4,               /* ADC Interrupt Flag    */
    bit_ADFR = 5,               /* Free Run Select       */
    bit_ADSC = 6,               /* ADC Start Conversion  */
    bit_ADEN = 7,               /* ADC Enable            */
} ADCSR_BITS;

typedef enum
{
    mask_ADPS0 = 1 << bit_ADPS0,
    mask_ADPS1 = 1 << bit_ADPS1,
    mask_ADPS2 = 1 << bit_ADPS2,
    mask_ADIE = 1 << bit_ADIE,
    mask_ADIF = 1 << bit_ADIF,
    mask_ADFR = 1 << bit_ADFR,
    mask_ADSC = 1 << bit_ADSC,
    mask_ADEN = 1 << bit_ADEN,
} ADCSR_MASKS;

typedef enum
{
    bit_MUX0 = 0,               /* MUX Channel Select Bit */
    bit_MUX1 = 1,               /* MUX Channel Select Bit */
    bit_MUX2 = 2,               /* MUX Channel Select Bit */
    bit_MUX3 = 3,               /* MUX Channel Select Bit */
} ADMUX_BITS;

typedef enum
{
    mask_MUX0 = 1 << bit_MUX0,
    mask_MUX1 = 1 << bit_MUX1,
    mask_MUX2 = 1 << bit_MUX2,
    mask_MUX3 = 1 << bit_MUX3,
} ADMUX_MASKS;

/* FIXME: This should be combined with the adc vdev (ADC_T). */

typedef struct _ADCIntr_T ADCIntr_T;

struct _ADCIntr_T
{
    VDevice parent;

    uint16_t adcsr_addr;
    uint16_t admux_addr;
    uint16_t rel_addr;          /* address of ADC data registers */

    uint8_t adcsr;              /* ADC Interrupt control and status register */
    uint8_t admux;              /* ADC Multiplexer Select register */

    CallBack *intr_cb;          /* callback for checking and raising
                                   interrupts */
};

extern VDevice *adc_int_create (int addr, char *name, int rel_addr,
                                void *data);
extern ADCIntr_T *adc_intr_new (int addr, char *name, int rel_addr);
extern void adc_intr_construct (ADCIntr_T *ti, int addr, char *name,
                                int rel_addr);
extern void adc_intr_destroy (void *ti);

/****************************************************************************\
 *
 * General ADC bits and masks.
 *
\****************************************************************************/

enum _adc_cs_constants
{
    ADC_CK_0 = 0x00,            /* CK/2 */
    ADC_CK_2 = 0x01,            /* CK/2 */
    ADC_CK_4 = 0x02,            /* CK/4 */
    ADC_CK_8 = 0x03,            /* CK/8 */
    ADC_CK_16 = 0x04,           /* CK/16 */
    ADC_CK_32 = 0x05,           /* CK/32 */
    ADC_CK_64 = 0x06,           /* CK/64 */
    ADC_CK_128 = 0x07,          /* CK/128 */
};

/****************************************************************************\
 *
 * ADC(VDevice) : ADC
 *
\****************************************************************************/

enum _adc_constants
{
    ADC_BASE_A = 0x24,          /* base memory address */
    ADC_BASE_U = 0x22,          /* base memory address */
    ADC_SIZE = 2,               /* ADC Data Register Size = 2 bytes */

    ADC_ADCL_ADDR = 0,          /* offset from base to ADCL Register */
    ADC_ADCH_ADDR = 1,          /* offset from base to ADCH Register */
};

typedef struct _ADC ADC_T;

struct _ADC
{
    VDevice parent;

    uint16_t adcl_addr;         /* data low register address */
    uint8_t adcl;               /* data low register */

    uint16_t adch_addr;         /* data high register address */
    uint8_t adch;               /* data high register */

    uint16_t rel_addr;          /* address of ADC int registers */

    uint16_t adc_count;         /* 16 bit count register */
    uint16_t adc_in;            /* new data register */
    uint16_t divisor;           /* clock divisor */
    uint8_t u_divisor;          /* extra usb clock divisor */
    CallBack *clk_cb;           /* incr timer tied to clock */
};

extern VDevice *adc_create (int addr, char *name, int rel_addr, void *data);
extern ADC_T *adc_new (int addr, char *name, uint8_t data, int rel_addr);
extern void adc_construct (ADC_T *adc, int addr, char *name, uint8_t data,
                           int rel_addr);
extern void adc_destroy (void *adc);
extern void adc_intr_set_flag (ADCIntr_T *ti);
extern void adc_intr_clear_flag (ADCIntr_T *ti);
extern uint16_t adc_port_rd (uint8_t mux);
extern void adc_port_wr (uint8_t val);

#endif