1 /*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2020-2021 Damien P. George
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 #include <stdio.h>
28
29 #include "py/compile.h"
30 #include "py/runtime.h"
31 #include "py/gc.h"
32 #include "py/mperrno.h"
33 #include "py/mphal.h"
34 #include "py/stackctrl.h"
35 #include "shared/readline/readline.h"
36 #include "shared/runtime/gchelper.h"
37 #include "shared/runtime/pyexec.h"
38 #include "tusb.h"
39 #include "uart.h"
40 #include "modmachine.h"
41 #include "modrp2.h"
42 #include "genhdr/mpversion.h"
43
44 #include "pico/stdlib.h"
45 #include "pico/binary_info.h"
46 #include "hardware/rtc.h"
47 #include "hardware/structs/rosc.h"
48
49 extern uint8_t __StackTop, __StackBottom;
50 static char gc_heap[192 * 1024];
51
52 // Embed version info in the binary in machine readable form
53 bi_decl(bi_program_version_string(MICROPY_GIT_TAG));
54
55 // Add a section to the picotool output similar to program features, but for frozen modules
56 // (it will aggregate BINARY_INFO_ID_MP_FROZEN binary info)
57 bi_decl(bi_program_feature_group_with_flags(BINARY_INFO_TAG_MICROPYTHON,
58 BINARY_INFO_ID_MP_FROZEN, "frozen modules",
59 BI_NAMED_GROUP_SEPARATE_COMMAS | BI_NAMED_GROUP_SORT_ALPHA));
60
main(int argc,char ** argv)61 int main(int argc, char **argv) {
62 #if MICROPY_HW_ENABLE_UART_REPL
63 bi_decl(bi_program_feature("UART REPL"))
64 setup_default_uart();
65 mp_uart_init();
66 #endif
67
68 #if MICROPY_HW_ENABLE_USBDEV
69 bi_decl(bi_program_feature("USB REPL"))
70 tusb_init();
71 #endif
72
73 #if MICROPY_PY_THREAD
74 bi_decl(bi_program_feature("thread support"))
75 mp_thread_init();
76 #endif
77
78 // Start and initialise the RTC
79 datetime_t t = {
80 .year = 2021,
81 .month = 1,
82 .day = 1,
83 .dotw = 4, // 0 is Monday, so 4 is Friday
84 .hour = 0,
85 .min = 0,
86 .sec = 0,
87 };
88 rtc_init();
89 rtc_set_datetime(&t);
90
91 // Initialise stack extents and GC heap.
92 mp_stack_set_top(&__StackTop);
93 mp_stack_set_limit(&__StackTop - &__StackBottom - 256);
94 gc_init(&gc_heap[0], &gc_heap[MP_ARRAY_SIZE(gc_heap)]);
95
96 for (;;) {
97
98 // Initialise MicroPython runtime.
99 mp_init();
100 mp_obj_list_init(MP_OBJ_TO_PTR(mp_sys_path), 0);
101 mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_));
102 mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
103 mp_obj_list_init(MP_OBJ_TO_PTR(mp_sys_argv), 0);
104
105 // Initialise sub-systems.
106 readline_init0();
107 machine_pin_init();
108 rp2_pio_init();
109
110 // Execute _boot.py to set up the filesystem.
111 pyexec_frozen_module("_boot.py");
112
113 // Execute user scripts.
114 int ret = pyexec_file_if_exists("boot.py");
115 if (ret & PYEXEC_FORCED_EXIT) {
116 goto soft_reset_exit;
117 }
118 if (pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL) {
119 ret = pyexec_file_if_exists("main.py");
120 if (ret & PYEXEC_FORCED_EXIT) {
121 goto soft_reset_exit;
122 }
123 }
124
125 for (;;) {
126 if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) {
127 if (pyexec_raw_repl() != 0) {
128 break;
129 }
130 } else {
131 if (pyexec_friendly_repl() != 0) {
132 break;
133 }
134 }
135 }
136
137 soft_reset_exit:
138 mp_printf(MP_PYTHON_PRINTER, "MPY: soft reboot\n");
139 rp2_pio_deinit();
140 machine_pin_deinit();
141 #if MICROPY_PY_THREAD
142 mp_thread_deinit();
143 #endif
144 gc_sweep_all();
145 mp_deinit();
146 }
147
148 return 0;
149 }
150
gc_collect(void)151 void gc_collect(void) {
152 gc_collect_start();
153 gc_helper_collect_regs_and_stack();
154 #if MICROPY_PY_THREAD
155 mp_thread_gc_others();
156 #endif
157 gc_collect_end();
158 }
159
nlr_jump_fail(void * val)160 void nlr_jump_fail(void *val) {
161 printf("FATAL: uncaught exception %p\n", val);
162 mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(val));
163 for (;;) {
164 __breakpoint();
165 }
166 }
167
168 #ifndef NDEBUG
__assert_func(const char * file,int line,const char * func,const char * expr)169 void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
170 printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
171 panic("Assertion failed");
172 }
173 #endif
174
175 #define POLY (0xD5)
176
rosc_random_u8(size_t cycles)177 uint8_t rosc_random_u8(size_t cycles) {
178 static uint8_t r;
179 for (size_t i = 0; i < cycles; ++i) {
180 r = ((r << 1) | rosc_hw->randombit) ^ (r & 0x80 ? POLY : 0);
181 mp_hal_delay_us_fast(1);
182 }
183 return r;
184 }
185
rosc_random_u32(void)186 uint32_t rosc_random_u32(void) {
187 uint32_t value = 0;
188 for (size_t i = 0; i < 4; ++i) {
189 value = value << 8 | rosc_random_u8(32);
190 }
191 return value;
192 }
193
194 const char rp2_help_text[] =
195 "Welcome to MicroPython!\n"
196 "\n"
197 "For online help please visit https://micropython.org/help/.\n"
198 "\n"
199 "For access to the hardware use the 'machine' module. RP2 specific commands\n"
200 "are in the 'rp2' module.\n"
201 "\n"
202 "Quick overview of some objects:\n"
203 " machine.Pin(pin) -- get a pin, eg machine.Pin(0)\n"
204 " machine.Pin(pin, m, [p]) -- get a pin and configure it for IO mode m, pull mode p\n"
205 " methods: init(..), value([v]), high(), low(), irq(handler)\n"
206 " machine.ADC(pin) -- make an analog object from a pin\n"
207 " methods: read_u16()\n"
208 " machine.PWM(pin) -- make a PWM object from a pin\n"
209 " methods: deinit(), freq([f]), duty_u16([d]), duty_ns([d])\n"
210 " machine.I2C(id) -- create an I2C object (id=0,1)\n"
211 " methods: readfrom(addr, buf, stop=True), writeto(addr, buf, stop=True)\n"
212 " readfrom_mem(addr, memaddr, arg), writeto_mem(addr, memaddr, arg)\n"
213 " machine.SPI(id, baudrate=1000000) -- create an SPI object (id=0,1)\n"
214 " methods: read(nbytes, write=0x00), write(buf), write_readinto(wr_buf, rd_buf)\n"
215 " machine.Timer(freq, callback) -- create a software timer object\n"
216 " eg: machine.Timer(freq=1, callback=lambda t:print(t))\n"
217 "\n"
218 "Pins are numbered 0-29, and 26-29 have ADC capabilities\n"
219 "Pin IO modes are: Pin.IN, Pin.OUT, Pin.ALT\n"
220 "Pin pull modes are: Pin.PULL_UP, Pin.PULL_DOWN\n"
221 "\n"
222 "Useful control commands:\n"
223 " CTRL-C -- interrupt a running program\n"
224 " CTRL-D -- on a blank line, do a soft reset of the board\n"
225 " CTRL-E -- on a blank line, enter paste mode\n"
226 "\n"
227 "For further help on a specific object, type help(obj)\n"
228 "For a list of available modules, type help('modules')\n"
229 ;
230