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
|
// GPIO functions on AVR.
//
// Copyright (C) 2016-2018 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "autoconf.h" // CONFIG_MACH_atmega644p
#include "command.h" // shutdown
#include "gpio.h" // gpio_out_write
#include "internal.h" // GPIO2REGS
#include "irq.h" // irq_save
#include "pgm.h" // PROGMEM
#include "sched.h" // sched_shutdown
#ifdef PINA
DECL_ENUMERATION_RANGE("pin", "PA0", GPIO('A', 0), 8);
#endif
DECL_ENUMERATION_RANGE("pin", "PB0", GPIO('B', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PC0", GPIO('C', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PD0", GPIO('D', 0), 8);
#if CONFIG_MACH_atmega328p
DECL_ENUMERATION_RANGE("pin", "PE0", GPIO('E', 0), 8);
#endif
#ifdef PINE
DECL_ENUMERATION_RANGE("pin", "PE0", GPIO('E', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PF0", GPIO('F', 0), 8);
#endif
#ifdef PING
DECL_ENUMERATION_RANGE("pin", "PG0", GPIO('G', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PH0", GPIO('H', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PJ0", GPIO('J', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PK0", GPIO('K', 0), 8);
DECL_ENUMERATION_RANGE("pin", "PL0", GPIO('L', 0), 8);
#endif
volatile uint8_t * const digital_regs[] PROGMEM = {
#ifdef PINA
&PINA,
#else
NULL,
#endif
&PINB, &PINC, &PIND,
#if CONFIG_MACH_atmega328p
&_SFR_IO8(0x0C), // PINE on atmega328pb
#endif
#ifdef PINE
&PINE, &PINF,
#endif
#ifdef PING
&PING, &PINH, NULL, &PINJ, &PINK, &PINL
#endif
};
struct gpio_out
gpio_out_setup(uint8_t pin, uint8_t val)
{
if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs))
goto fail;
struct gpio_digital_regs *regs = GPIO2REGS(pin);
if (! regs)
goto fail;
struct gpio_out g = { .regs=regs, .bit=GPIO2BIT(pin) };
gpio_out_reset(g, val);
return g;
fail:
shutdown("Not an output pin");
}
void
gpio_out_reset(struct gpio_out g, uint8_t val)
{
irqstatus_t flag = irq_save();
uint8_t newmode = g.regs->mode | g.bit;
uint8_t newout = val ? (g.regs->out | g.bit) : (g.regs->out & ~g.bit);
g.regs->out = newout;
g.regs->mode = newmode;
irq_restore(flag);
}
void
gpio_out_toggle_noirq(struct gpio_out g)
{
g.regs->in = g.bit;
}
void
gpio_out_toggle(struct gpio_out g)
{
gpio_out_toggle_noirq(g);
}
void
gpio_out_write(struct gpio_out g, uint8_t val)
{
irqstatus_t flag = irq_save();
g.regs->out = val ? (g.regs->out | g.bit) : (g.regs->out & ~g.bit);
irq_restore(flag);
}
struct gpio_in
gpio_in_setup(uint8_t pin, int8_t pull_up)
{
if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs) || pull_up < 0)
goto fail;
struct gpio_digital_regs *regs = GPIO2REGS(pin);
if (! regs)
goto fail;
struct gpio_in g = { .regs=regs, .bit=GPIO2BIT(pin) };
gpio_in_reset(g, pull_up);
return g;
fail:
shutdown("Not a valid input pin");
}
void
gpio_in_reset(struct gpio_in g, int8_t pull_up)
{
irqstatus_t flag = irq_save();
uint8_t newout = pull_up>0 ? (g.regs->out | g.bit) : (g.regs->out & ~g.bit);
uint8_t newmode = g.regs->mode & ~g.bit;
g.regs->mode = newmode;
g.regs->out = newout;
irq_restore(flag);
}
uint8_t
gpio_in_read(struct gpio_in g)
{
return !!(g.regs->in & g.bit);
}
|
