forked from adafruit/circuitpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy path__init__.c
More file actions
238 lines (199 loc) · 7.8 KB
/
__init__.c
File metadata and controls
238 lines (199 loc) · 7.8 KB
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
//
// SPDX-License-Identifier: MIT
#include "shared-bindings/board/__init__.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-module/board/__init__.h"
#include "mpconfigboard.h"
#include "py/runtime.h"
#if CIRCUITPY_BUSIO
#include "shared-bindings/busio/I2C.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/busio/UART.h"
#endif
#if CIRCUITPY_DISPLAYIO
#include "shared-module/displayio/__init__.h"
#endif
#if CIRCUITPY_SHARPDISPLAY
#include "shared-bindings/sharpdisplay/SharpMemoryFramebuffer.h"
#include "shared-module/sharpdisplay/SharpMemoryFramebuffer.h"
#endif
#if CIRCUITPY_AURORA_EPAPER
#include "shared-bindings/aurora_epaper/aurora_framebuffer.h"
#include "shared-module/aurora_epaper/aurora_framebuffer.h"
#endif
#if CIRCUITPY_BOARD_I2C
// Statically allocate the I2C object so it can live past the end of the heap and into the next VM.
// That way it can be used by built-in I2CDisplay displays and be accessible through board.I2C().
typedef struct {
const mcu_pin_obj_t *scl;
const mcu_pin_obj_t *sda;
} board_i2c_pin_t;
static const board_i2c_pin_t i2c_pin[CIRCUITPY_BOARD_I2C] = CIRCUITPY_BOARD_I2C_PIN;
static busio_i2c_obj_t i2c_obj[CIRCUITPY_BOARD_I2C];
static bool i2c_obj_created[CIRCUITPY_BOARD_I2C];
bool common_hal_board_is_i2c(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_I2C; instance++) {
if (obj == &i2c_obj[instance]) {
return true;
}
}
return false;
}
mp_obj_t common_hal_board_get_i2c(const mp_int_t instance) {
return i2c_obj_created[instance] ? &i2c_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_i2c(const mp_int_t instance) {
const mp_obj_t singleton = common_hal_board_get_i2c(instance);
if (singleton != NULL && !common_hal_busio_i2c_deinited(singleton)) {
return singleton;
}
busio_i2c_obj_t *self = &i2c_obj[instance];
self->base.type = &busio_i2c_type;
assert_pin_free(i2c_pin[instance].scl);
assert_pin_free(i2c_pin[instance].sda);
common_hal_busio_i2c_construct(self, i2c_pin[instance].scl, i2c_pin[instance].sda, 100000, 255);
i2c_obj_created[instance] = true;
return &i2c_obj[instance];
}
#endif
#if CIRCUITPY_BOARD_SPI
// Statically allocate the SPI object so it can live past the end of the heap and into the next VM.
// That way it can be used by built-in FourWire displays and be accessible through board.SPI().
typedef struct {
const mcu_pin_obj_t *clock;
const mcu_pin_obj_t *mosi;
const mcu_pin_obj_t *miso;
} board_spi_pin_t;
static const board_spi_pin_t spi_pin[CIRCUITPY_BOARD_SPI] = CIRCUITPY_BOARD_SPI_PIN;
static busio_spi_obj_t spi_obj[CIRCUITPY_BOARD_SPI];
static bool spi_obj_created[CIRCUITPY_BOARD_SPI];
bool common_hal_board_is_spi(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_SPI; instance++) {
if (obj == &spi_obj[instance]) {
return true;
}
}
return false;
}
mp_obj_t common_hal_board_get_spi(const mp_int_t instance) {
return spi_obj_created[instance] ? &spi_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_spi(const mp_int_t instance) {
const mp_obj_t singleton = common_hal_board_get_spi(instance);
if (singleton != NULL && !common_hal_busio_spi_deinited(singleton)) {
return singleton;
}
busio_spi_obj_t *self = &spi_obj[instance];
self->base.type = &busio_spi_type;
assert_pin_free(spi_pin[instance].clock);
assert_pin_free(spi_pin[instance].mosi);
assert_pin_free(spi_pin[instance].miso);
common_hal_busio_spi_construct(self, spi_pin[instance].clock, spi_pin[instance].mosi, spi_pin[instance].miso, false);
spi_obj_created[instance] = true;
return &spi_obj[instance];
}
#endif
#if CIRCUITPY_BOARD_UART
MP_REGISTER_ROOT_POINTER(mp_obj_t board_uart_bus);
typedef struct {
const mcu_pin_obj_t *tx;
const mcu_pin_obj_t *rx;
} board_uart_pin_t;
static const board_uart_pin_t uart_pin[CIRCUITPY_BOARD_UART] = CIRCUITPY_BOARD_UART_PIN;
static busio_uart_obj_t uart_obj[CIRCUITPY_BOARD_UART];
static bool uart_obj_created[CIRCUITPY_BOARD_UART];
bool common_hal_board_is_uart(mp_obj_t obj) {
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_UART; instance++) {
if (obj == &uart_obj[instance]) {
return true;
}
}
return false;
}
mp_obj_t common_hal_board_get_uart(const mp_int_t instance) {
return uart_obj_created[instance] ? &uart_obj[instance] : NULL;
}
mp_obj_t common_hal_board_create_uart(const mp_int_t instance) {
const mp_obj_t singleton = common_hal_board_get_uart(instance);
if (singleton != NULL && !common_hal_busio_uart_deinited(singleton)) {
return singleton;
}
busio_uart_obj_t *self = &uart_obj[instance];
self->base.type = &busio_uart_type;
MP_STATE_VM(board_uart_bus) = &uart_obj;
assert_pin_free(uart_pin[instance].tx);
assert_pin_free(uart_pin[instance].rx);
common_hal_busio_uart_construct(self, uart_pin[instance].tx, uart_pin[instance].rx,
NULL, NULL, NULL, false, 9600, 8, BUSIO_UART_PARITY_NONE, 1, 1.0f, 64, NULL, false);
uart_obj_created[instance] = true;
return &uart_obj[instance];
}
#endif
void reset_board_buses(void) {
#if CIRCUITPY_BOARD_I2C
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_I2C; instance++) {
bool display_using_i2c = false;
#if CIRCUITPY_I2CDISPLAYBUS
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (display_buses[i].bus_base.type == &i2cdisplaybus_i2cdisplaybus_type && display_buses[i].i2cdisplay_bus.bus == &i2c_obj[instance]) {
display_using_i2c = true;
break;
}
}
#endif
if (i2c_obj_created[instance]) {
// make sure I2C lock is not held over a soft reset
common_hal_busio_i2c_unlock(&i2c_obj[instance]);
if (!display_using_i2c) {
common_hal_busio_i2c_deinit(&i2c_obj[instance]);
i2c_obj_created[instance] = false;
}
}
}
#endif
#if CIRCUITPY_BOARD_SPI
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_SPI; instance++) {
bool display_using_spi = false;
#if CIRCUITPY_FOURWIRE || CIRCUITPY_SHARPDISPLAY || CIRCUITPY_AURORA_EPAPER
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
mp_const_obj_t bus_type = display_buses[i].bus_base.type;
#if CIRCUITPY_FOURWIRE
if (bus_type == &fourwire_fourwire_type && display_buses[i].fourwire_bus.bus == &spi_obj[instance]) {
display_using_spi = true;
break;
}
#endif
#if CIRCUITPY_SHARPDISPLAY
if (bus_type == &sharpdisplay_framebuffer_type && display_buses[i].sharpdisplay.bus == &spi_obj[instance]) {
display_using_spi = true;
break;
}
#endif
#if CIRCUITPY_AURORA_EPAPER
if (bus_type == &aurora_epaper_framebuffer_type && display_buses[i].aurora_epaper.bus == &spi_obj[instance]) {
display_using_spi = true;
break;
}
#endif
}
#endif
if (spi_obj_created[instance]) {
if (!display_using_spi) {
common_hal_busio_spi_deinit(&spi_obj[instance]);
spi_obj_created[instance] = false;
}
}
}
#endif
#if CIRCUITPY_BOARD_UART
for (uint8_t instance = 0; instance < CIRCUITPY_BOARD_UART; instance++) {
if (uart_obj_created[instance]) {
common_hal_busio_uart_deinit(&uart_obj[instance]);
uart_obj_created[instance] = false;
}
}
#endif
}