a2e1867f69
Tested & working: * Send standard packets * Receive standard packets (1 FIFO, no filter) Interoperation between SAM E54 Xplained running this tree and MicroPython running on STM32F405 Feather with an external transceiver was also tested. Many other aspects of a full implementation are not yet present, such as error detection and recovery.
570 lines
18 KiB
C
Executable File
570 lines
18 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 "background.h"
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#include "mpconfigboard.h"
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#include "supervisor/background_callback.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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#include "boards/board.h"
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#if CIRCUITPY_DISPLAYIO
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#include "shared-module/displayio/__init__.h"
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#endif
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#if CIRCUITPY_MEMORYMONITOR
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#include "shared-module/memorymonitor/__init__.h"
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#endif
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#if CIRCUITPY_NETWORK
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#include "shared-module/network/__init__.h"
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#endif
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#if CIRCUITPY_BOARD
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#include "shared-module/board/__init__.h"
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#endif
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#if CIRCUITPY_BLEIO
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#include "shared-bindings/_bleio/__init__.h"
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#include "supervisor/shared/bluetooth.h"
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#endif
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#if CIRCUITPY_CANIO
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#include "common-hal/_canio/CAN.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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#if MICROPY_ENABLE_PYSTACK
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static size_t PLACE_IN_DTCM_BSS(_pystack[CIRCUITPY_PYSTACK_SIZE / sizeof(size_t)]);
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#endif
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static void reset_devices(void) {
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#if CIRCUITPY_BLEIO_HCI
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bleio_reset();
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#endif
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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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if (stack_alloc != NULL) {
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mp_stack_set_limit(stack_alloc->length - 1024);
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}
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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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if (stack_alloc != NULL) {
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mp_stack_set_bottom(stack_alloc->ptr);
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mp_stack_fill_with_sentinel();
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}
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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_PYSTACK
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mp_pystack_init(_pystack, _pystack + (sizeof(_pystack) / sizeof(size_t)));
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#endif
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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 CIRCUITPY_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 CIRCUITPY_NETWORK
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network_module_deinit();
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#endif
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#if MICROPY_VFS
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mp_vfs_mount_t *vfs = MP_STATE_VM(vfs_mount_table);
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// Unmount all heap allocated vfs mounts.
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while (gc_nbytes(vfs) > 0) {
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vfs = vfs->next;
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}
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MP_STATE_VM(vfs_mount_table) = vfs;
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MP_STATE_VM(vfs_cur) = vfs;
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#endif
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background_callback_reset();
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gc_deinit();
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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 * const * 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 * const * 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[decompress_length(compressed)];
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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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void cleanup_after_vm(supervisor_allocation* heap) {
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// Reset port-independent devices, like CIRCUITPY_BLEIO_HCI.
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reset_devices();
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// Turn off the display and flush the fileystem before the heap disappears.
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#if CIRCUITPY_DISPLAYIO
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reset_displays();
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#endif
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#if CIRCUITPY_MEMORYMONITOR
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memorymonitor_reset();
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#endif
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filesystem_flush();
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stop_mp();
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free_memory(heap);
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supervisor_move_memory();
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#ifdef CIRCUITPY_CANIO
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common_hal_canio_reset();
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#endif
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reset_port();
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#if CIRCUITPY_BOARD
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reset_board_busses();
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#endif
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reset_board();
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reset_status_led();
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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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#if CIRCUITPY_AUTORELOAD_DELAY_MS > 0
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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! "));
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serial_write_compressed(translate("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! "));
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serial_write_compressed(translate("Not running saved code.\n"));
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} else {
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new_status_color(MAIN_RUNNING);
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static const char * const supported_filenames[] = STRING_LIST("code.txt", "code.py", "main.py", "main.txt");
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#if CIRCUITPY_FULL_BUILD
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static const char * const 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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#endif
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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 CIRCUITPY_FULL_BUILD
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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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#endif
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cleanup_after_vm(heap);
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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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// Display a different completion message if the user has no USB attached (cannot save files)
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if (!serial_connected_at_start) {
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serial_write_compressed(translate("\nCode done running. Waiting for reload.\n"));
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}
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bool serial_connected_before_animation = false;
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#if CIRCUITPY_DISPLAYIO
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bool refreshed_epaper_display = false;
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#endif
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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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RUN_BACKGROUND_TASKS;
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if (reload_requested) {
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reload_requested = false;
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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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// Refresh the ePaper display if we have one. That way it'll show an error message.
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#if CIRCUITPY_DISPLAYIO
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if (!refreshed_epaper_display) {
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refreshed_epaper_display = maybe_refresh_epaperdisplay();
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}
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#endif
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tick_rgb_status_animation(&animation);
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}
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}
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FIL* boot_output_file;
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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 * const 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_set_internal_writable_by_usb(false);
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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_set_internal_writable_by_usb(true);
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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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cleanup_after_vm(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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cleanup_after_vm(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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// initialise the cpu and peripherals
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safe_mode_t safe_mode = port_init();
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// Init memory after the port in case the port needs to set aside memory.
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memory_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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// displays init after filesystem, since they could share the flash SPI
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board_init();
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|
|
// Start the debug serial
|
|
serial_early_init();
|
|
|
|
// Reset everything and prep MicroPython to run boot.py.
|
|
reset_port();
|
|
// Port-independent devices, like CIRCUITPY_BLEIO_HCI.
|
|
reset_devices();
|
|
reset_board();
|
|
|
|
// Turn on autoreload by default but before boot.py in case it wants to change it.
|
|
autoreload_enable();
|
|
|
|
// By default our internal flash is readonly to local python code and
|
|
// writable over USB. Set it here so that boot.py can change it.
|
|
filesystem_set_internal_concurrent_write_protection(true);
|
|
filesystem_set_internal_writable_by_usb(true);
|
|
|
|
run_boot_py(safe_mode);
|
|
|
|
// Start serial and HID after giving boot.py a chance to tweak behavior.
|
|
serial_init();
|
|
|
|
#if CIRCUITPY_BLEIO
|
|
supervisor_start_bluetooth();
|
|
#endif
|
|
|
|
// Boot script is finished, so now go into REPL/main mode.
|
|
int exit_code = PYEXEC_FORCED_EXIT;
|
|
bool skip_repl = true;
|
|
bool first_run = true;
|
|
for (;;) {
|
|
if (!skip_repl) {
|
|
exit_code = run_repl();
|
|
}
|
|
if (exit_code == PYEXEC_FORCED_EXIT) {
|
|
if (!first_run) {
|
|
serial_write_compressed(translate("soft reboot\n"));
|
|
}
|
|
first_run = false;
|
|
skip_repl = run_code_py(safe_mode);
|
|
} else if (exit_code != 0) {
|
|
break;
|
|
}
|
|
}
|
|
mp_deinit();
|
|
return 0;
|
|
}
|
|
|
|
void gc_collect(void) {
|
|
gc_collect_start();
|
|
|
|
mp_uint_t regs[10];
|
|
mp_uint_t sp = cpu_get_regs_and_sp(regs);
|
|
|
|
// This collects root pointers from the VFS mount table. Some of them may
|
|
// have lost their references in the VM even though they are mounted.
|
|
gc_collect_root((void**)&MP_STATE_VM(vfs_mount_table), sizeof(mp_vfs_mount_t) / sizeof(mp_uint_t));
|
|
|
|
background_callback_gc_collect();
|
|
|
|
#if CIRCUITPY_DISPLAYIO
|
|
displayio_gc_collect();
|
|
#endif
|
|
|
|
#if CIRCUITPY_BLEIO
|
|
common_hal_bleio_gc_collect();
|
|
#endif
|
|
|
|
// This naively collects all object references from an approximate stack
|
|
// range.
|
|
gc_collect_root((void**)sp, ((uint32_t)port_stack_get_top() - sp) / sizeof(uint32_t));
|
|
gc_collect_end();
|
|
}
|
|
|
|
void NORETURN nlr_jump_fail(void *val) {
|
|
reset_into_safe_mode(MICROPY_NLR_JUMP_FAIL);
|
|
while (true) {}
|
|
}
|
|
|
|
void NORETURN __fatal_error(const char *msg) {
|
|
reset_into_safe_mode(MICROPY_FATAL_ERROR);
|
|
while (true) {}
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
|
|
mp_printf(&mp_plat_print, "Assertion '%s' failed, at file %s:%d\n", expr, file, line);
|
|
__fatal_error("Assertion failed");
|
|
}
|
|
#endif
|