6ef8639971
This creates a common safe mode mechanic that ports can share. As a result, the nRF52 now has safe mode support as well. The common safe mode adds a 700ms delay at startup where a reset during that window will cause a reset into safe mode. This window is designated by a yellow status pixel and flashing the single led three times. A couple NeoPixel fixes are included for the nRF52 as well. Fixes #1034. Fixes #990. Fixes #615.
450 lines
16 KiB
C
Executable File
450 lines
16 KiB
C
Executable File
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016-2017 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <string.h>
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#include "extmod/vfs.h"
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#include "extmod/vfs_fat.h"
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#include "genhdr/mpversion.h"
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#include "py/nlr.h"
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#include "py/compile.h"
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#include "py/frozenmod.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "py/repl.h"
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#include "py/gc.h"
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#include "py/stackctrl.h"
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#include "lib/mp-readline/readline.h"
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#include "lib/utils/pyexec.h"
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#include "mpconfigboard.h"
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#include "supervisor/cpu.h"
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#include "supervisor/memory.h"
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#include "supervisor/port.h"
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#include "supervisor/filesystem.h"
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#include "supervisor/shared/autoreload.h"
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#include "supervisor/shared/translate.h"
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#include "supervisor/shared/rgb_led_status.h"
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#include "supervisor/shared/safe_mode.h"
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#include "supervisor/shared/status_leds.h"
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#include "supervisor/shared/stack.h"
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#include "supervisor/serial.h"
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#ifdef MICROPY_PY_NETWORK
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#include "shared-module/network/__init__.h"
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#endif
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void do_str(const char *src, mp_parse_input_kind_t input_kind) {
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
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if (lex == NULL) {
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//printf("MemoryError: lexer could not allocate memory\n");
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return;
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}
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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qstr source_name = lex->source_name;
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mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
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mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, true);
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mp_call_function_0(module_fun);
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nlr_pop();
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} else {
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// uncaught exception
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mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
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}
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}
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void start_mp(supervisor_allocation* heap) {
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reset_status_led();
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autoreload_stop();
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// Stack limit should be less than real stack size, so we have a chance
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// to recover from limit hit. (Limit is measured in bytes.)
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mp_stack_ctrl_init();
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mp_stack_set_limit(stack_alloc->length - 1024);
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#if MICROPY_MAX_STACK_USAGE
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// _ezero (same as _ebss) is an int, so start 4 bytes above it.
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mp_stack_set_bottom(stack_alloc->ptr);
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mp_stack_fill_with_sentinel();
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#endif
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// Sync the file systems in case any used RAM from the GC to cache. As soon
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// as we re-init the GC all bets are off on the cache.
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filesystem_flush();
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// Clear the readline history. It references the heap we're about to destroy.
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readline_init0();
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#if MICROPY_ENABLE_GC
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gc_init(heap->ptr, heap->ptr + heap->length / 4);
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#endif
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mp_init();
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mp_obj_list_init(mp_sys_path, 0);
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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_));
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// Frozen modules are in their own pseudo-dir, e.g., ".frozen".
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// Prioritize .frozen over /lib.
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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_FROZEN_FAKE_DIR_QSTR));
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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib));
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mp_obj_list_init(mp_sys_argv, 0);
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#if MICROPY_PY_NETWORK
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network_module_init();
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#endif
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}
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void stop_mp(void) {
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#if MICROPY_PY_NETWORK
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network_module_deinit();
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#endif
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}
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#define STRING_LIST(...) {__VA_ARGS__, ""}
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// Look for the first file that exists in the list of filenames, using mp_import_stat().
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// Return its index. If no file found, return -1.
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const char* first_existing_file_in_list(const char ** filenames) {
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for (int i = 0; filenames[i] != (char*)""; i++) {
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mp_import_stat_t stat = mp_import_stat(filenames[i]);
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if (stat == MP_IMPORT_STAT_FILE) {
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return filenames[i];
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}
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}
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return NULL;
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}
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bool maybe_run_list(const char ** filenames, pyexec_result_t* exec_result) {
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const char* filename = first_existing_file_in_list(filenames);
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if (filename == NULL) {
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return false;
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}
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mp_hal_stdout_tx_str(filename);
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const compressed_string_t* compressed = translate(" output:\n");
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char decompressed[compressed->length];
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decompress(compressed, decompressed);
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mp_hal_stdout_tx_str(decompressed);
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pyexec_file(filename, exec_result);
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return true;
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}
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bool run_code_py(safe_mode_t safe_mode) {
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bool serial_connected_at_start = serial_connected();
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#ifdef CIRCUITPY_AUTORELOAD_DELAY_MS
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if (serial_connected_at_start) {
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serial_write("\n");
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if (autoreload_is_enabled()) {
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serial_write_compressed(translate("Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.\n"));
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} else if (safe_mode != NO_SAFE_MODE) {
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serial_write_compressed(translate("Running in safe mode! Auto-reload is off.\n"));
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} else if (!autoreload_is_enabled()) {
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serial_write_compressed(translate("Auto-reload is off.\n"));
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}
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}
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#endif
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pyexec_result_t result;
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result.return_code = 0;
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result.exception_type = NULL;
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result.exception_line = 0;
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bool found_main = false;
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if (safe_mode != NO_SAFE_MODE) {
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serial_write_compressed(translate("Running in safe mode! Not running saved code.\n"));
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} else {
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new_status_color(MAIN_RUNNING);
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const char *supported_filenames[] = STRING_LIST("code.txt", "code.py", "main.py", "main.txt");
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const char *double_extension_filenames[] = STRING_LIST("code.txt.py", "code.py.txt", "code.txt.txt","code.py.py",
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"main.txt.py", "main.py.txt", "main.txt.txt","main.py.py");
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stack_resize();
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filesystem_flush();
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supervisor_allocation* heap = allocate_remaining_memory();
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start_mp(heap);
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found_main = maybe_run_list(supported_filenames, &result);
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if (!found_main){
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found_main = maybe_run_list(double_extension_filenames, &result);
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if (found_main) {
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serial_write_compressed(translate("WARNING: Your code filename has two extensions\n"));
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}
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}
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stop_mp();
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free_memory(heap);
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reset_port();
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reset_board();
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reset_status_led();
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if (result.return_code & PYEXEC_FORCED_EXIT) {
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return reload_requested;
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}
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}
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// Wait for connection or character.
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bool serial_connected_before_animation = false;
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rgb_status_animation_t animation;
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prep_rgb_status_animation(&result, found_main, safe_mode, &animation);
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while (true) {
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#ifdef CIRCUITPY_SUPERVISOR_BACKGROUND
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CIRCUITPY_SUPERVISOR_BACKGROUND
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#endif
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if (reload_requested) {
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return true;
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}
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if (serial_connected() && serial_bytes_available()) {
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// Skip REPL if reload was requested.
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return (serial_read() == CHAR_CTRL_D);
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}
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if (!serial_connected_before_animation && serial_connected()) {
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if (serial_connected_at_start) {
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serial_write("\n\n");
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}
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if (!serial_connected_at_start) {
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if (autoreload_is_enabled()) {
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serial_write_compressed(translate("Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.\n"));
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} else {
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serial_write_compressed(translate("Auto-reload is off.\n"));
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}
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}
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print_safe_mode_message(safe_mode);
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serial_write("\n");
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serial_write_compressed(translate("Press any key to enter the REPL. Use CTRL-D to reload."));
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}
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if (serial_connected_before_animation && !serial_connected()) {
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serial_connected_at_start = false;
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}
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serial_connected_before_animation = serial_connected();
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tick_rgb_status_animation(&animation);
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}
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}
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void __attribute__ ((noinline)) run_boot_py(safe_mode_t safe_mode) {
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// If not in safe mode, run boot before initing USB and capture output in a
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// file.
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if (filesystem_present() && safe_mode == NO_SAFE_MODE && MP_STATE_VM(vfs_mount_table) != NULL) {
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static const char *boot_py_filenames[] = STRING_LIST("settings.txt", "settings.py", "boot.py", "boot.txt");
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new_status_color(BOOT_RUNNING);
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#ifdef CIRCUITPY_BOOT_OUTPUT_FILE
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FIL file_pointer;
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boot_output_file = &file_pointer;
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// Get the base filesystem.
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FATFS *fs = &((fs_user_mount_t *) MP_STATE_VM(vfs_mount_table)->obj)->fatfs;
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bool have_boot_py = first_existing_file_in_list(boot_py_filenames) != NULL;
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bool skip_boot_output = false;
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// If there's no boot.py file that might write some changing output,
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// read the existing copy of CIRCUITPY_BOOT_OUTPUT_FILE and see if its contents
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// match the version info we would print anyway. If so, skip writing CIRCUITPY_BOOT_OUTPUT_FILE.
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// This saves wear and tear on the flash and also prevents filesystem damage if power is lost
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// during the write, which may happen due to bobbling the power connector or weak power.
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static const size_t NUM_CHARS_TO_COMPARE = 160;
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if (!have_boot_py && f_open(fs, boot_output_file, CIRCUITPY_BOOT_OUTPUT_FILE, FA_READ) == FR_OK) {
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char file_contents[NUM_CHARS_TO_COMPARE];
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UINT chars_read = 0;
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f_read(boot_output_file, file_contents, NUM_CHARS_TO_COMPARE, &chars_read);
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f_close(boot_output_file);
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skip_boot_output =
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// + 2 accounts for \r\n.
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chars_read == strlen(MICROPY_FULL_VERSION_INFO) + 2 &&
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strncmp(file_contents, MICROPY_FULL_VERSION_INFO, strlen(MICROPY_FULL_VERSION_INFO)) == 0;
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}
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if (!skip_boot_output) {
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// Wait 1.5 seconds before opening CIRCUITPY_BOOT_OUTPUT_FILE for write,
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// in case power is momentary or will fail shortly due to, say a low, battery.
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mp_hal_delay_ms(1500);
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// USB isn't up, so we can write the file.
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filesystem_writable_by_python(true);
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f_open(fs, boot_output_file, CIRCUITPY_BOOT_OUTPUT_FILE, FA_WRITE | FA_CREATE_ALWAYS);
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// Switch the filesystem back to non-writable by Python now instead of later,
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// since boot.py might change it back to writable.
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filesystem_writable_by_python(false);
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// Write version info to boot_out.txt.
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mp_hal_stdout_tx_str(MICROPY_FULL_VERSION_INFO);
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mp_hal_stdout_tx_str("\r\n");
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}
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#endif
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// TODO(tannewt): Allocate temporary space to hold custom usb descriptors.
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filesystem_flush();
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supervisor_allocation* heap = allocate_remaining_memory();
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start_mp(heap);
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// TODO(tannewt): Re-add support for flashing boot error output.
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bool found_boot = maybe_run_list(boot_py_filenames, NULL);
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(void) found_boot;
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#ifdef CIRCUITPY_BOOT_OUTPUT_FILE
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if (!skip_boot_output) {
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f_close(boot_output_file);
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filesystem_flush();
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}
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boot_output_file = NULL;
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#endif
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// Reset to remove any state that boot.py setup. It should only be used to
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// change internal state that's not in the heap.
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reset_port();
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reset_board();
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stop_mp();
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free_memory(heap);
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}
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}
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int run_repl(void) {
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int exit_code = PYEXEC_FORCED_EXIT;
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stack_resize();
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filesystem_flush();
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supervisor_allocation* heap = allocate_remaining_memory();
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start_mp(heap);
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autoreload_suspend();
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new_status_color(REPL_RUNNING);
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if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) {
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exit_code = pyexec_raw_repl();
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} else {
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exit_code = pyexec_friendly_repl();
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}
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reset_port();
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reset_board();
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stop_mp();
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free_memory(heap);
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autoreload_resume();
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return exit_code;
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}
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int __attribute__((used)) main(void) {
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memory_init();
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// initialise the cpu and peripherals
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safe_mode_t safe_mode = port_init();
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// Turn on LEDs
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init_status_leds();
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rgb_led_status_init();
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// Wait briefly to give a reset window where we'll enter safe mode after the reset.
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if (safe_mode == NO_SAFE_MODE) {
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safe_mode = wait_for_safe_mode_reset();
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}
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stack_init();
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// Create a new filesystem only if we're not in a safe mode.
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// A power brownout here could make it appear as if there's
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// no SPI flash filesystem, and we might erase the existing one.
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filesystem_init(safe_mode == NO_SAFE_MODE, false);
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// Reset everything and prep MicroPython to run boot.py.
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reset_port();
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reset_board();
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// Turn on autoreload by default but before boot.py in case it wants to change it.
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autoreload_enable();
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// By default our internal flash is readonly to local python code and
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// writable over USB. Set it here so that boot.py can change it.
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filesystem_writable_by_python(false);
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run_boot_py(safe_mode);
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// Start serial and HID after giving boot.py a chance to tweak behavior.
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serial_init();
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// Boot script is finished, so now go into REPL/main mode.
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int exit_code = PYEXEC_FORCED_EXIT;
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bool skip_repl = true;
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bool first_run = true;
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for (;;) {
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if (!skip_repl) {
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exit_code = run_repl();
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}
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if (exit_code == PYEXEC_FORCED_EXIT) {
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if (!first_run) {
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serial_write_compressed(translate("soft reboot\n"));
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}
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first_run = false;
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skip_repl = run_code_py(safe_mode);
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} else if (exit_code != 0) {
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break;
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}
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}
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mp_deinit();
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return 0;
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}
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void gc_collect(void) {
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gc_collect_start();
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mp_uint_t regs[10];
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mp_uint_t sp = cpu_get_regs_and_sp(regs);
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// This collects root pointers from the VFS mount table. Some of them may
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// have lost their references in the VM even though they are mounted.
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gc_collect_root((void**)&MP_STATE_VM(vfs_mount_table), sizeof(mp_vfs_mount_t) / sizeof(mp_uint_t));
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// This naively collects all object references from an approximate stack
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// range.
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gc_collect_root((void**)sp, ((uint32_t)&_estack - sp) / sizeof(uint32_t));
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gc_collect_end();
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}
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void NORETURN nlr_jump_fail(void *val) {
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reset_into_safe_mode(MICROPY_NLR_JUMP_FAIL);
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while (true) {}
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}
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void NORETURN __fatal_error(const char *msg) {
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reset_into_safe_mode(MICROPY_FATAL_ERROR);
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while (true) {}
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}
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#ifndef NDEBUG
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void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
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mp_printf(&mp_plat_print, "Assertion '%s' failed, at file %s:%d\n", expr, file, line);
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__fatal_error("Assertion failed");
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}
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#endif
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