114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
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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 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland 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 "py/mphal.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "common-hal/microcontroller/Pin.h"
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#include "common-hal/microcontroller/Processor.h"
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#include "shared-bindings/nvm/ByteArray.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/microcontroller/Processor.h"
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#include "supervisor/port.h"
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#include "supervisor/filesystem.h"
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#include "supervisor/shared/safe_mode.h"
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void common_hal_mcu_delay_us(uint32_t delay) {
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uint32_t ticks_per_us = HAL_RCC_GetSysClockFreq() / 1000000UL;
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delay *= ticks_per_us;
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SysTick->VAL = 0UL;
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SysTick->LOAD = delay;
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SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
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while ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0) {
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}
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SysTick->CTRL = 0UL;
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}
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volatile uint32_t nesting_count = 0;
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void common_hal_mcu_disable_interrupts(void) {
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__disable_irq();
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__DMB();
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nesting_count++;
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}
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void common_hal_mcu_enable_interrupts(void) {
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if (nesting_count == 0) {
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// This is very very bad because it means there was mismatched disable/enables.
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reset_into_safe_mode(SAFE_MODE_INTERRUPT_ERROR);
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}
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nesting_count--;
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if (nesting_count > 0) {
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return;
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}
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__DMB();
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__enable_irq();
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}
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static bool next_reset_to_bootloader = false;
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void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
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if (runmode == RUNMODE_SAFE_MODE) {
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safe_mode_on_next_reset(SAFE_MODE_PROGRAMMATIC);
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}
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if (runmode == RUNMODE_BOOTLOADER) {
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next_reset_to_bootloader = true;
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}
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}
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void common_hal_mcu_reset(void) {
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filesystem_flush(); // TODO: implement as part of flash improvements
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if (next_reset_to_bootloader) {
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reset_to_bootloader();
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} else {
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NVIC_SystemReset();
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}
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}
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// The singleton microcontroller.Processor object, bound to microcontroller.cpu
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// It currently only has properties, and no state.
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const mcu_processor_obj_t common_hal_mcu_processor_obj = {
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.base = {
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.type = &mcu_processor_type,
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},
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};
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#if CIRCUITPY_INTERNAL_NVM_SIZE > 0
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// The singleton nvm.ByteArray object.
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const nvm_bytearray_obj_t common_hal_mcu_nvm_obj = {
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.base = {
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.type = &nvm_bytearray_type,
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},
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.len = NVM_BYTEARRAY_BUFFER_SIZE,
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.start_address = (uint8_t *)(CIRCUITPY_INTERNAL_NVM_START_ADDR)
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};
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#endif
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