7a074a14ce
The safe boot pin, when pulled high during reset rolls back the firmware to the "factory" image and skips execution of 'boot.py' and 'main.py'. This is useful to recover from a crash condition. The system led is used mostly to signal errors.
135 lines
4.4 KiB
C
135 lines
4.4 KiB
C
/*
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* This file is part of the Micro Python 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) 2013, 2014 Damien P. George
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* Copyright (c) 2015 Daniel Campora
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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 <std.h>
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#include <stdint.h>
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#include <string.h>
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#include "py/mpconfig.h"
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#include MICROPY_HAL_H
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#include "py/obj.h"
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#include "hw_ints.h"
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#include "hw_types.h"
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#include "hw_gpio.h"
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#include "hw_memmap.h"
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#include "hw_gprcm.h"
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#include "hw_common_reg.h"
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#include "pin.h"
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#include "gpio.h"
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#include "rom.h"
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#include "rom_map.h"
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#include "prcm.h"
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#include "pybuart.h"
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#include "utils.h"
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#define MPERROR_TOOGLE_MS (200)
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#define MPERROR_SIGNAL_ERROR_MS (2000)
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#define MPERROR_SAFE_BOOT_REG_IDX (0)
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void mperror_init0 (void) {
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// Enable SYS GPIOs peripheral clocks
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MAP_PRCMPeripheralClkEnable(MICROPY_SYS_LED_PRCM, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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#ifdef BOOTLOADER
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MAP_PRCMPeripheralClkEnable(MICROPY_SAFE_BOOT_PRCM, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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#endif
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// Configure the bld
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MAP_PinTypeGPIO(MICROPY_SYS_LED_PIN_NUM, PIN_MODE_0, false);
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MAP_PinConfigSet(MICROPY_SYS_LED_PIN_NUM, PIN_STRENGTH_6MA, PIN_TYPE_STD);
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MAP_GPIODirModeSet(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, GPIO_DIR_MODE_OUT);
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#ifdef BOOTLOADER
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// Configure the safe boot pin
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MAP_PinTypeGPIO(MICROPY_SAFE_BOOT_PIN_NUM, PIN_MODE_0, false);
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MAP_PinConfigSet(MICROPY_SAFE_BOOT_PIN_NUM, PIN_STRENGTH_4MA, PIN_TYPE_STD_PD);
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MAP_GPIODirModeSet(MICROPY_SAFE_BOOT_PORT, MICROPY_SAFE_BOOT_PORT_PIN, GPIO_DIR_MODE_IN);
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#endif
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}
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void mperror_deinit_sfe_pin (void) {
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// disable the pull-down
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MAP_PinConfigSet(MICROPY_SAFE_BOOT_PIN_NUM, PIN_STRENGTH_4MA, PIN_TYPE_STD);
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}
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void mperror_signal_error (void) {
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uint32_t count = 0;
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while ((MPERROR_TOOGLE_MS * count++) > MPERROR_SIGNAL_ERROR_MS) {
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// toogle the led
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MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, ~MAP_GPIOPinRead(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN));
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UtilsDelay(UTILS_DELAY_US_TO_COUNT(MPERROR_TOOGLE_MS * 1000));
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}
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}
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void mperror_request_safe_boot (void) {
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MAP_PRCMOCRRegisterWrite(MPERROR_SAFE_BOOT_REG_IDX, 1);
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}
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void mperror_clear_safe_boot (void) {
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MAP_PRCMOCRRegisterWrite(MPERROR_SAFE_BOOT_REG_IDX, 0);
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}
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// returns the last state of the safe boot request and clears the register
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bool mperror_safe_boot_requested (void) {
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bool ret = MAP_PRCMOCRRegisterRead(MPERROR_SAFE_BOOT_REG_IDX);
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mperror_clear_safe_boot();
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return ret;
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}
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void NORETURN __fatal_error(const char *msg) {
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#ifdef DEBUG
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if (msg != NULL) {
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// wait for 20ms
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UtilsDelay(UTILS_DELAY_US_TO_COUNT(20000));
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mp_hal_stdout_tx_str("\r\nFATAL ERROR:");
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mp_hal_stdout_tx_str(msg);
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mp_hal_stdout_tx_str("\r\n");
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}
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#endif
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// signal the crash with the system led
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MAP_GPIOPinWrite(MICROPY_SYS_LED_PORT, MICROPY_SYS_LED_PORT_PIN, MICROPY_SYS_LED_PORT_PIN);
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for ( ;; ) {__WFI();}
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}
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void __assert_func(const char *file, int line, const char *func, const char *expr) {
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(void) func;
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printf("Assertion failed: %s, file %s, line %d\n", expr, file, line);
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__fatal_error(NULL);
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}
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void nlr_jump_fail(void *val) {
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#ifdef DEBUG
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char msg[64];
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snprintf(msg, sizeof(msg), "uncaught exception %p\n", val);
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__fatal_error(msg);
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#else
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__fatal_error(NULL);
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#endif
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}
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