c4db8b87e2
Restructures the STM port of Circuitpython to be more generic about the STM32 chip lines to support the F7 and H7 series of chips. Adds the new Packages directory to organize different chip layouts between lines. Makes general changes to the Makefile to condense board-level flags to the minimum and support the new chip series. Adds the new chip line to the Peripherals directory, along with new python tools used to generate peripheral text automatically in the tools/ directory.
80 lines
2.9 KiB
C
80 lines
2.9 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) 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 "tick.h"
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#include "supervisor/filesystem.h"
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#include "supervisor/shared/tick.h"
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#include "shared-bindings/microcontroller/Processor.h"
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void SysTick_Handler(void) {
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// SysTick interrupt handler called when the SysTick timer reaches zero
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// (every millisecond).
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// Do things common to all ports when the tick occurs
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supervisor_tick();
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}
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uint32_t HAL_GetTick(void) //override ST HAL
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{
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return (uint32_t)supervisor_ticks_ms32();
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}
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void tick_init() {
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uint32_t ticks_per_ms = SystemCoreClock/ 1000;
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SysTick_Config(ticks_per_ms); // interrupt is enabled
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NVIC_EnableIRQ(SysTick_IRQn);
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// Bump up the systick interrupt so nothing else interferes with timekeeping.
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NVIC_SetPriority(SysTick_IRQn, 0);
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NVIC_SetPriority(OTG_FS_IRQn, 1);
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}
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void tick_delay(uint32_t us) {
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uint32_t ticks_per_us = SystemCoreClock / 1000 / 1000;
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uint32_t us_between_ticks = SysTick->VAL / ticks_per_us;
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uint64_t start_ms = supervisor_ticks_ms64();
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while (us > 1000) {
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while (supervisor_ticks_ms64() == start_ms) {}
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us -= us_between_ticks;
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start_ms = supervisor_ticks_ms64();
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us_between_ticks = 1000;
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}
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while (SysTick->VAL > ((us_between_ticks - us) * ticks_per_us)) {}
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}
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// us counts down!
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void current_tick(uint64_t* ms, uint32_t* us_until_ms) {
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uint32_t ticks_per_us = SystemCoreClock / 1000 / 1000;
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*ms = supervisor_ticks_ms32();
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*us_until_ms = SysTick->VAL / ticks_per_us;
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}
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void wait_until(uint64_t ms, uint32_t us_until_ms) {
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uint32_t ticks_per_us = SystemCoreClock / 1000 / 1000;
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while(supervisor_ticks_ms64() <= ms && SysTick->VAL / ticks_per_us >= us_until_ms) {}
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}
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