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Diffstat (limited to 'atmel-samd/main.c')
| -rw-r--r-- | atmel-samd/main.c | 779 |
1 files changed, 0 insertions, 779 deletions
diff --git a/atmel-samd/main.c b/atmel-samd/main.c deleted file mode 100644 index 3a2d5a63c..000000000 --- a/atmel-samd/main.c +++ /dev/null @@ -1,779 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include <stdint.h> -#include <string.h> - -#include "py/nlr.h" -#include "py/compile.h" -#include "py/frozenmod.h" -#include "py/mphal.h" -#include "py/runtime.h" -#include "py/repl.h" -#include "py/gc.h" -#include "py/stackctrl.h" - -#include "extmod/vfs_fat.h" -#include "lib/oofatfs/ff.h" -#include "lib/oofatfs/diskio.h" -#include "lib/mp-readline/readline.h" -#include "lib/utils/pyexec.h" - -#include "asf/common/services/sleepmgr/sleepmgr.h" -#include "asf/common/services/usb/udc/udc.h" -#include "asf/common2/services/delay/delay.h" -#include "asf/sam0/drivers/nvm/nvm.h" -#include "asf/sam0/drivers/port/port.h" -#include "asf/sam0/drivers/sercom/usart/usart.h" -#include "asf/sam0/drivers/system/system.h" -#include <board.h> - -#include "boards/board.h" - -#include "common-hal/analogio/AnalogIn.h" -#include "common-hal/audioio/AudioOut.h" -#include "common-hal/audiobusio/PDMIn.h" -#include "common-hal/pulseio/PulseIn.h" -#include "common-hal/pulseio/PulseOut.h" -#include "common-hal/pulseio/PWMOut.h" -#include "common-hal/usb_hid/__init__.h" - -#include "autoreload.h" -#include "flash_api.h" -#include "mpconfigboard.h" -#include "rgb_led_status.h" -#include "shared_dma.h" -#include "tick.h" - -#ifdef EXPRESS_BOARD -#include "common-hal/touchio/TouchIn.h" -#define INTERNAL_CIRCUITPY_CONFIG_START_ADDR (0x00040000 - 0x100 - CIRCUITPY_INTERNAL_NVM_SIZE) -#else -#define INTERNAL_CIRCUITPY_CONFIG_START_ADDR (0x00040000 - 0x010000 - 0x100 - CIRCUITPY_INTERNAL_NVM_SIZE) -#endif - -fs_user_mount_t fs_user_mount_flash; -mp_vfs_mount_t mp_vfs_mount_flash; - -typedef enum { - NO_SAFE_MODE = 0, - BROWNOUT, - HARD_CRASH, - USER_SAFE_MODE, -} safe_mode_t; - -void do_str(const char *src, mp_parse_input_kind_t input_kind) { - mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0); - if (lex == NULL) { - printf("MemoryError: lexer could not allocate memory\n"); - return; - } - - nlr_buf_t nlr; - if (nlr_push(&nlr) == 0) { - qstr source_name = lex->source_name; - mp_parse_tree_t parse_tree = mp_parse(lex, input_kind); - mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, true); - mp_call_function_0(module_fun); - nlr_pop(); - } else { - // uncaught exception - mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val); - } -} - -// we don't make this function static because it needs a lot of stack and we -// want it to be executed without using stack within main() function -void init_flash_fs(void) { - // init the vfs object - fs_user_mount_t *vfs_fat = &fs_user_mount_flash; - vfs_fat->flags = 0; - flash_init_vfs(vfs_fat); - - // try to mount the flash - FRESULT res = f_mount(&vfs_fat->fatfs); - - if (res == FR_NO_FILESYSTEM) { - // no filesystem so create a fresh one - - uint8_t working_buf[_MAX_SS]; - res = f_mkfs(&vfs_fat->fatfs, FM_FAT, 0, working_buf, sizeof(working_buf)); - // Flush the new file system to make sure its repaired immediately. - flash_flush(); - if (res != FR_OK) { - return; - } - - // set label - f_setlabel(&vfs_fat->fatfs, "CIRCUITPY"); - } else if (res != FR_OK) { - return; - } - mp_vfs_mount_t *vfs = &mp_vfs_mount_flash; - vfs->str = "/"; - vfs->len = 1; - vfs->obj = MP_OBJ_FROM_PTR(vfs_fat); - vfs->next = NULL; - MP_STATE_VM(vfs_mount_table) = vfs; - - // The current directory is used as the boot up directory. - // It is set to the internal flash filesystem by default. - MP_STATE_PORT(vfs_cur) = vfs; -} - -static char heap[16384 + 4096]; - -void reset_mp(void) { - reset_status_led(); - new_status_color(0x8f008f); - autoreload_stop(); - - // Sync the file systems in case any used RAM from the GC to cache. As soon - // as we re-init the GC all bets are off on the cache. - flash_flush(); - - // Clear the readline history. It references the heap we're about to destroy. - readline_init0(); - - #if MICROPY_ENABLE_GC - gc_init(heap, heap + sizeof(heap)); - #endif - mp_init(); - mp_obj_list_init(mp_sys_path, 0); - mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script) - mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_)); - mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_lib)); - // Frozen modules are in their own pseudo-dir, e.g., ".frozen". - mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_FROZEN_FAKE_DIR_QSTR)); - - mp_obj_list_init(mp_sys_argv, 0); -} - -extern volatile bool mp_msc_enabled; - -void reset_samd21(void) { - // Reset all SERCOMs except the one being used by the SPI flash. - Sercom *sercom_instances[SERCOM_INST_NUM] = SERCOM_INSTS; - for (int i = 0; i < SERCOM_INST_NUM; i++) { - #ifdef SPI_FLASH_SERCOM - if (sercom_instances[i] == SPI_FLASH_SERCOM) { - continue; - } - #endif - #ifdef MICROPY_HW_APA102_SERCOM - if (sercom_instances[i] == MICROPY_HW_APA102_SERCOM) { - continue; - } - #endif - sercom_instances[i]->SPI.CTRLA.bit.SWRST = 1; - } - -#ifdef EXPRESS_BOARD - audioout_reset(); - touchin_reset(); - pdmin_reset(); - pulsein_reset(); - pulseout_reset(); - pwmout_reset(); -#endif - - analogin_reset(); - - - // Wait for the DAC to sync then reset. - while (DAC->STATUS.reg & DAC_STATUS_SYNCBUSY) {} - DAC->CTRLA.reg |= DAC_CTRLA_SWRST; - - reset_all_pins(); - - - usb_hid_reset(); - -#ifdef CALIBRATE_CRYSTALLESS - // If we are on USB lets double check our fine calibration for the clock and - // save the new value if its different enough. - if (mp_msc_enabled) { - SYSCTRL->DFLLSYNC.bit.READREQ = 1; - uint16_t saved_calibration = 0x1ff; - if (strcmp((char*) INTERNAL_CIRCUITPY_CONFIG_START_ADDR, "CIRCUITPYTHON1") == 0) { - saved_calibration = ((uint16_t *) INTERNAL_CIRCUITPY_CONFIG_START_ADDR)[8]; - } - while (SYSCTRL->PCLKSR.bit.DFLLRDY == 0) { - // TODO(tannewt): Run the mass storage stuff if this takes a while. - } - int16_t current_calibration = SYSCTRL->DFLLVAL.bit.FINE; - if (abs(current_calibration - saved_calibration) > 10) { - enum status_code error_code; - uint8_t page_buffer[NVMCTRL_ROW_SIZE]; - for (int i = 0; i < NVMCTRL_ROW_PAGES; i++) { - do - { - error_code = nvm_read_buffer(INTERNAL_CIRCUITPY_CONFIG_START_ADDR + i * NVMCTRL_PAGE_SIZE, - page_buffer + i * NVMCTRL_PAGE_SIZE, - NVMCTRL_PAGE_SIZE); - } while (error_code == STATUS_BUSY); - } - // If this is the first write, include the header. - if (strcmp((char*) page_buffer, "CIRCUITPYTHON1") != 0) { - memcpy(page_buffer, "CIRCUITPYTHON1", 15); - } - // First 16 bytes (0-15) are ID. Little endian! - page_buffer[16] = current_calibration & 0xff; - page_buffer[17] = current_calibration >> 8; - do - { - error_code = nvm_erase_row(INTERNAL_CIRCUITPY_CONFIG_START_ADDR); - } while (error_code == STATUS_BUSY); - for (int i = 0; i < NVMCTRL_ROW_PAGES; i++) { - do - { - error_code = nvm_write_buffer(INTERNAL_CIRCUITPY_CONFIG_START_ADDR + i * NVMCTRL_PAGE_SIZE, - page_buffer + i * NVMCTRL_PAGE_SIZE, - NVMCTRL_PAGE_SIZE); - } while (error_code == STATUS_BUSY); - } - } - } -#endif -} - -bool maybe_run(const char* filename, pyexec_result_t* exec_result) { - mp_import_stat_t stat = mp_import_stat(filename); - if (stat != MP_IMPORT_STAT_FILE) { - return false; - } - mp_hal_stdout_tx_str(filename); - mp_hal_stdout_tx_str(" output:\r\n"); - pyexec_file(filename, exec_result); - return true; -} - -bool start_mp(safe_mode_t safe_mode) { - bool cdc_enabled_at_start = mp_cdc_enabled; - #ifdef CIRCUITPY_AUTORELOAD_DELAY_MS - if (cdc_enabled_at_start) { - mp_hal_stdout_tx_str("\r\n"); - if (autoreload_is_enabled()) { - mp_hal_stdout_tx_str("Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.\r\n"); - } else if (safe_mode != NO_SAFE_MODE) { - mp_hal_stdout_tx_str("Running in safe mode! Auto-reload is off.\r\n"); - } else if (!autoreload_is_enabled()) { - mp_hal_stdout_tx_str("Auto-reload is off.\r\n"); - } - } - #endif - - pyexec_result_t result; - bool found_main = false; - if (safe_mode != NO_SAFE_MODE) { - mp_hal_stdout_tx_str("Running in safe mode! Not running saved code.\r\n"); - } else { - new_status_color(MAIN_RUNNING); - found_main = maybe_run("code.txt", &result) || - maybe_run("code.py", &result) || - maybe_run("main.py", &result) || - maybe_run("main.txt", &result); - reset_status_led(); - - if (result.return_code & PYEXEC_FORCED_EXIT) { - return reload_next_character; - } - - // If not is USB mode then do not skip the repl. - #ifndef USB_REPL - return false; - #endif - } - - // Wait for connection or character. - bool cdc_enabled_before = false; - #if defined(MICROPY_HW_NEOPIXEL) || (defined(MICROPY_HW_APA102_MOSI) && defined(MICROPY_HW_APA102_SCK)) - new_status_color(ALL_DONE); - uint32_t pattern_start = ticks_ms; - - uint32_t total_exception_cycle = 0; - uint8_t ones = result.exception_line % 10; - ones += ones > 0 ? 1 : 0; - uint8_t tens = (result.exception_line / 10) % 10; - tens += tens > 0 ? 1 : 0; - uint8_t hundreds = (result.exception_line / 100) % 10; - hundreds += hundreds > 0 ? 1 : 0; - uint8_t thousands = (result.exception_line / 1000) % 10; - thousands += thousands > 0 ? 1 : 0; - uint8_t digit_sum = ones + tens + hundreds + thousands; - uint8_t num_places = 0; - uint16_t line = result.exception_line; - for (int i = 0; i < 4; i++) { - if ((line % 10) > 0) { - num_places++; - } - line /= 10; - } - if (result.return_code == PYEXEC_EXCEPTION) { - total_exception_cycle = EXCEPTION_TYPE_LENGTH_MS * 3 + LINE_NUMBER_TOGGLE_LENGTH * digit_sum + LINE_NUMBER_TOGGLE_LENGTH * num_places; - } - #endif - while (true) { - #ifdef MICROPY_VM_HOOK_LOOP - MICROPY_VM_HOOK_LOOP - #endif - if (reload_next_character) { - return true; - } - if (usb_rx_count > 0) { - // Skip REPL if reload was requested. - return receive_usb() == CHAR_CTRL_D; - } - - if (!cdc_enabled_before && mp_cdc_enabled) { - if (cdc_enabled_at_start) { - mp_hal_stdout_tx_str("\r\n\r\n"); - } - - if (!cdc_enabled_at_start) { - if (autoreload_is_enabled()) { - mp_hal_stdout_tx_str("Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.\r\n"); - } else { - mp_hal_stdout_tx_str("Auto-reload is off.\r\n"); - } - } - // Output a user safe mode string if its set. - #ifdef BOARD_USER_SAFE_MODE - if (safe_mode == USER_SAFE_MODE) { - mp_hal_stdout_tx_str("\r\nYou requested starting safe mode by "); - mp_hal_stdout_tx_str(BOARD_USER_SAFE_MODE); - mp_hal_stdout_tx_str(".\r\nTo exit, please reset the board without "); - mp_hal_stdout_tx_str(BOARD_USER_SAFE_MODE); - mp_hal_stdout_tx_str(".\r\n"); - } else - #endif - if (safe_mode != NO_SAFE_MODE) { - mp_hal_stdout_tx_str("\r\nYou are running in safe mode which means something really bad happened.\r\n"); - if (safe_mode == HARD_CRASH) { - mp_hal_stdout_tx_str("Looks like our core CircuitPython code crashed hard. Whoops!\r\n"); - mp_hal_stdout_tx_str("Please file an issue here with the contents of your CIRCUITPY drive:\r\n"); - mp_hal_stdout_tx_str("https://github.com/adafruit/circuitpython/issues\r\n"); - } else if (safe_mode == BROWNOUT) { - mp_hal_stdout_tx_str("The microcontroller's power dipped. Please make sure your power supply provides \r\n"); - mp_hal_stdout_tx_str("enough power for the whole circuit and press reset (after ejecting CIRCUITPY).\r\n"); - } - } - mp_hal_stdout_tx_str("\r\nPress any key to enter the REPL. Use CTRL-D to reload.\r\n"); - } - if (cdc_enabled_before && !mp_cdc_enabled) { - cdc_enabled_at_start = false; - } - cdc_enabled_before = mp_cdc_enabled; - - #if defined(MICROPY_HW_NEOPIXEL) || (defined(MICROPY_HW_APA102_MOSI) && defined(MICROPY_HW_APA102_SCK)) - uint32_t tick_diff = ticks_ms - pattern_start; - if (result.return_code != PYEXEC_EXCEPTION) { - // All is good. Ramp ALL_DONE up and down. - if (tick_diff > ALL_GOOD_CYCLE_MS) { - pattern_start = ticks_ms; - tick_diff = 0; - } - - uint16_t brightness = tick_diff * 255 / (ALL_GOOD_CYCLE_MS / 2); - if (brightness > 255) { - brightness = 511 - brightness; - } - if (safe_mode == NO_SAFE_MODE) { - new_status_color(color_brightness(ALL_DONE, brightness)); - } else { - new_status_color(color_brightness(SAFE_MODE, brightness)); - } - } else { - if (tick_diff > total_exception_cycle) { - pattern_start = ticks_ms; - tick_diff = 0; - } - // First flash the file color. - if (tick_diff < EXCEPTION_TYPE_LENGTH_MS) { - if (found_main) { - new_status_color(MAIN_RUNNING); - } else { - new_status_color(BOOT_RUNNING); - } - // Next flash the exception color. - } else if (tick_diff < EXCEPTION_TYPE_LENGTH_MS * 2) { - if (mp_obj_is_subclass_fast(result.exception_type, &mp_type_IndentationError)) { - new_status_color(INDENTATION_ERROR); - } else if (mp_obj_is_subclass_fast(result.exception_type, &mp_type_SyntaxError)) { - new_status_color(SYNTAX_ERROR); - } else if (mp_obj_is_subclass_fast(result.exception_type, &mp_type_NameError)) { - new_status_color(NAME_ERROR); - } else if (mp_obj_is_subclass_fast(result.exception_type, &mp_type_OSError)) { - new_status_color(OS_ERROR); - } else if (mp_obj_is_subclass_fast(result.exception_type, &mp_type_ValueError)) { - new_status_color(VALUE_ERROR); - } else { - new_status_color(OTHER_ERROR); - } - // Finally flash the line number digits from highest to lowest. - // Zeroes will not produce a flash but can be read by the absence of - // a color from the sequence. - } else if (tick_diff < (EXCEPTION_TYPE_LENGTH_MS * 2 + LINE_NUMBER_TOGGLE_LENGTH * digit_sum)) { - uint32_t digit_diff = tick_diff - EXCEPTION_TYPE_LENGTH_MS * 2; - if ((digit_diff % LINE_NUMBER_TOGGLE_LENGTH) < (LINE_NUMBER_TOGGLE_LENGTH / 2)) { - new_status_color(BLACK); - } else if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * thousands) { - if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH) { - new_status_color(BLACK); - } else { - new_status_color(THOUSANDS); - } - } else if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * (thousands + hundreds)) { - if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * (thousands + 1)) { - new_status_color(BLACK); - } else { - new_status_color(HUNDREDS); - } - } else if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * (thousands + hundreds + tens)) { - if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * (thousands + hundreds + 1)) { - new_status_color(BLACK); - } else { - new_status_color(TENS); - } - } else { - if (digit_diff < LINE_NUMBER_TOGGLE_LENGTH * (thousands + hundreds + tens + 1)) { - new_status_color(BLACK); - } else { - new_status_color(ONES); - } - } - } else { - new_status_color(BLACK); - } - } - #else - (void) found_main; // Pretend to use found_main so the compiler doesn't complain. - #endif - } -} - -#ifdef UART_REPL -struct usart_module usart_instance; -#endif - -#ifdef ENABLE_MICRO_TRACE_BUFFER -// Stores 2 ^ TRACE_BUFFER_MAGNITUDE_PACKETS packets. -// 7 -> 128 packets -#define TRACE_BUFFER_MAGNITUDE_PACKETS 7 -// Size in uint32_t. Two per packet. -#define TRACE_BUFFER_SIZE (1 << (TRACE_BUFFER_MAGNITUDE_PACKETS + 1)) -// Size in bytes. 4 bytes per uint32_t. -#define TRACE_BUFFER_SIZE_BYTES (TRACE_BUFFER_SIZE << 2) -__attribute__((__aligned__(TRACE_BUFFER_SIZE_BYTES))) uint32_t mtb[TRACE_BUFFER_SIZE]; -#endif - -// Serial number as hex characters. -char serial_number[USB_DEVICE_GET_SERIAL_NAME_LENGTH]; -void load_serial_number(void) { - char nibble_to_hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', - 'B', 'C', 'D', 'E', 'F'}; - uint32_t* addresses[4] = {(uint32_t *) 0x0080A00C, (uint32_t *) 0x0080A040, - (uint32_t *) 0x0080A044, (uint32_t *) 0x0080A048}; - for (int i = 0; i < 4; i++) { - for (int j = 0; j < 8; j++) { - uint8_t nibble = (*(addresses[i]) >> j * 4) & 0xf; - serial_number[i * 8 + j] = nibble_to_hex[nibble]; - } - } -} - -// Provided by the linker; -extern uint32_t _ezero; - -safe_mode_t samd21_init(void) { -#ifdef ENABLE_MICRO_TRACE_BUFFER - REG_MTB_POSITION = ((uint32_t) (mtb - REG_MTB_BASE)) & 0xFFFFFFF8; - REG_MTB_FLOW = (((uint32_t) mtb - REG_MTB_BASE) + TRACE_BUFFER_SIZE_BYTES) & 0xFFFFFFF8; - REG_MTB_MASTER = 0x80000000 + (TRACE_BUFFER_MAGNITUDE_PACKETS - 1); -#else - // Triple check that the MTB is off. Switching between debug and non-debug - // builds can leave it set over reset and wreak havok as a result. - REG_MTB_MASTER = 0x00000000 + 6; -#endif - -// On power on start or external reset, set _ezero to the canary word. If it -// gets killed, we boot in safe mod. _ezero is the boundary between statically -// allocated memory including the fixed MicroPython heap and the stack. If either -// misbehaves, the canary will not be in tact after soft reset. -#ifdef CIRCUITPY_CANARY_WORD - if (PM->RCAUSE.bit.POR == 1 || PM->RCAUSE.bit.EXT == 1) { - _ezero = CIRCUITPY_CANARY_WORD; - } else if (PM->RCAUSE.bit.SYST == 1) { - // If we're starting from a system reset we're likely coming from the - // bootloader or hard fault handler. If we're coming from the handler - // the canary will be CIRCUITPY_SAFE_RESTART_WORD and we don't want to - // revive the canary so that a second hard fault won't restart. Resets - // from anywhere else are ok. - if (_ezero == CIRCUITPY_SAFE_RESTART_WORD) { - _ezero = ~CIRCUITPY_CANARY_WORD; - } else { - _ezero = CIRCUITPY_CANARY_WORD; - } - } -#endif - - load_serial_number(); - - irq_initialize_vectors(); - cpu_irq_enable(); - - // Initialize the sleep manager - sleepmgr_init(); - - uint16_t dfll_fine_calibration = 0x1ff; -#ifdef CALIBRATE_CRYSTALLESS - // This is stored in an NVM page after the text and data storage but before - // the optional file system. The first 16 bytes are the identifier for the - // section. - if (strcmp((char*) INTERNAL_CIRCUITPY_CONFIG_START_ADDR, "CIRCUITPYTHON1") == 0) { - dfll_fine_calibration = ((uint16_t *) INTERNAL_CIRCUITPY_CONFIG_START_ADDR)[8]; - } -#endif - - // We pass in the DFLL fine calibration because we can't change it once the - // clock is going. - system_init(dfll_fine_calibration); - - delay_init(); - - board_init(); - - // Configure millisecond timer initialization. - tick_init(); - - // Uncomment to init PIN_PA17 for debugging. - // struct port_config pin_conf; - // port_get_config_defaults(&pin_conf); - // - // pin_conf.direction = PORT_PIN_DIR_OUTPUT; - // port_pin_set_config(MICROPY_HW_LED1, &pin_conf); - // port_pin_set_output_level(MICROPY_HW_LED1, false); - - rgb_led_status_init(); - - // Init the nvm controller. - struct nvm_config config_nvm; - nvm_get_config_defaults(&config_nvm); - config_nvm.manual_page_write = false; - nvm_set_config(&config_nvm); - - init_shared_dma(); - - #ifdef CIRCUITPY_CANARY_WORD - // Run in safe mode if the canary is corrupt. - if (_ezero != CIRCUITPY_CANARY_WORD) { - return HARD_CRASH; - } - #endif - - if (PM->RCAUSE.bit.BOD33 == 1 || PM->RCAUSE.bit.BOD12 == 1) { - return BROWNOUT; - } - - if (board_requests_safe_mode()) { - return USER_SAFE_MODE; - } - - #if CIRCUITPY_INTERNAL_NVM_SIZE > 0 - // Upgrade the nvm flash to include one sector for eeprom emulation. - struct nvm_fusebits fuses; - if (nvm_get_fuses(&fuses) == STATUS_OK && - fuses.eeprom_size == NVM_EEPROM_EMULATOR_SIZE_0) { - #ifdef INTERNAL_FLASH_FS - // Shift the internal file system up one row. - for (uint8_t row = 0; row < TOTAL_INTERNAL_FLASH_SIZE / NVMCTRL_ROW_SIZE; row++) { - uint32_t new_row_address = INTERNAL_FLASH_MEM_SEG1_START_ADDR + row * NVMCTRL_ROW_SIZE; - nvm_erase_row(new_row_address); - nvm_write_buffer(new_row_address, - (uint8_t*) (new_row_address + CIRCUITPY_INTERNAL_EEPROM_SIZE), - NVMCTRL_ROW_SIZE); - } - #endif - uint32_t nvm_size = CIRCUITPY_INTERNAL_NVM_SIZE; - uint8_t enum_value = 6; - while (nvm_size > 256 && enum_value != 255) { - nvm_size /= 2; - enum_value -= 1; - } - if (enum_value != 255 && nvm_size == 256) { - // Mark the last section as eeprom now. - fuses.eeprom_size = (enum nvm_eeprom_emulator_size) enum_value; - nvm_set_fuses(&fuses); - } - } - #endif - - return NO_SAFE_MODE; -} - -extern uint32_t _estack; -extern uint32_t _ebss; - -int main(void) { - // initialise the cpu and peripherals - safe_mode_t safe_mode = samd21_init(); - - // Stack limit should be less than real stack size, so we have a chance - // to recover from limit hit. (Limit is measured in bytes.) - mp_stack_ctrl_init(); - mp_stack_set_limit((char*)&_estack - (char*)&_ebss - 1024); - - -#if MICROPY_MAX_STACK_USAGE - // _ezero (same as _ebss) is an int, so start 4 bytes above it. - mp_stack_set_bottom(&_ezero + 1); - mp_stack_fill_with_sentinel(); -#endif - - init_flash_fs(); - - // Reset everything and prep MicroPython to run boot.py. - reset_samd21(); - reset_board(); - reset_mp(); - - // 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 - // writeable over USB. Set it here so that boot.py can change it. - flash_set_usb_writeable(true); - - // If not in safe mode, run boot before initing USB and capture output in a - // file. - if (safe_mode == NO_SAFE_MODE && MP_STATE_VM(vfs_mount_table) != NULL) { - new_status_color(BOOT_RUNNING); - #ifdef CIRCUITPY_BOOT_OUTPUT_FILE - // Since USB isn't up yet we can cheat and let ourselves write the boot - // output file. - flash_set_usb_writeable(false); - FIL file_pointer; - boot_output_file = &file_pointer; - f_open(&((fs_user_mount_t *) MP_STATE_VM(vfs_mount_table)->obj)->fatfs, - boot_output_file, CIRCUITPY_BOOT_OUTPUT_FILE, FA_WRITE | FA_CREATE_ALWAYS); - flash_set_usb_writeable(true); - #endif - - // TODO(tannewt): Re-add support for flashing boot error output. - bool found_boot = maybe_run("settings.txt", NULL) || - maybe_run("settings.py", NULL) || - maybe_run("boot.py", NULL) || - maybe_run("boot.txt", NULL); - (void) found_boot; - - #ifdef CIRCUITPY_BOOT_OUTPUT_FILE - f_close(boot_output_file); - flash_flush(); - boot_output_file = NULL; - #endif - - // Reset to remove any state that boot.py setup. It should only be used to - // change internal state thats not in the heap. - reset_samd21(); - reset_mp(); - } - - usb_hid_init(); - - // Start USB after getting everything going. - #ifdef USB_REPL - udc_start(); - #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) { - // The REPL mode can change, or it can request a reload. - bool autoreload_on = autoreload_is_enabled(); - autoreload_disable(); - new_status_color(REPL_RUNNING); - if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) { - exit_code = pyexec_raw_repl(); - } else { - exit_code = pyexec_friendly_repl(); - } - if (autoreload_on) { - autoreload_enable(); - } - reset_samd21(); - reset_board(); - reset_mp(); - } - if (exit_code == PYEXEC_FORCED_EXIT) { - if (!first_run) { - mp_hal_stdout_tx_str("soft reboot\r\n"); - } - first_run = false; - skip_repl = start_mp(safe_mode); - reset_samd21(); - reset_board(); - reset_mp(); - } else if (exit_code != 0) { - break; - } - } - mp_deinit(); - return 0; -} - -void gc_collect(void) { - // WARNING: This gc_collect implementation doesn't try to get root - // pointers from CPU registers, and thus may function incorrectly. - void *dummy; - gc_collect_start(); - // 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)); - // This naively collects all object references from an approximate stack - // range. - gc_collect_root(&dummy, ((mp_uint_t)&_estack - (mp_uint_t)&dummy) / sizeof(mp_uint_t)); - gc_collect_end(); -} - -void NORETURN nlr_jump_fail(void *val) { - HardFault_Handler(); - while (true) {} -} - -void NORETURN __fatal_error(const char *msg) { - HardFault_Handler(); - while (true) {} -} - -#ifndef NDEBUG -void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) { - printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line); - __fatal_error("Assertion failed"); -} -#endif |