mirror of
https://github.com/GorgonMeducer/perf_counter.git
synced 2025-02-07 19:34:18 +08:00
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
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/*----------------------------------------------------------------------------
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* Name: Blinky.c
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* Purpose: LED Flasher for MPS2
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* Note(s): possible defines set in "options for target - C/C++ - Define"
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* __USE_LCD - enable Output on GLCD
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* __USE_TIMER0 - use Timer0 to generate timer interrupt
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* - use SysTick to generate timer interrupt (default)
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*----------------------------------------------------------------------------
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* This file is part of the uVision/ARM development tools.
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* This software may only be used under the terms of a valid, current,
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* end user licence from KEIL for a compatible version of KEIL software
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* development tools. Nothing else gives you the right to use this software.
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*
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* This software is supplied "AS IS" without warranties of any kind.
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*
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* Copyright (c) 2015 Keil - An ARM Company. All rights reserved.
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*----------------------------------------------------------------------------*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "ARMCM3.h" // Keil::Board Support:V2M-MPS2:Common
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#include <assert.h>
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extern
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void uart_config(uint32_t wUARTFrequency);
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__attribute__((weak))
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void systimer_1ms_handler(void)
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{
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//assert(false);
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}
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static volatile uint32_t s_wMSCounter = 0;
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/*----------------------------------------------------------------------------
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SysTick / Timer0 IRQ Handler
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*----------------------------------------------------------------------------*/
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void SysTick_Handler (void)
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{
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if (s_wMSCounter) {
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s_wMSCounter--;
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}
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systimer_1ms_handler();
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}
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void delay_ms(uint32_t wMillisecond)
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{
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s_wMSCounter = wMillisecond;
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while( s_wMSCounter > 0 );
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}
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/*! \brief initialise platform before main()
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*/
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__attribute__((constructor(101)))
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void platform_init(void)
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{
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SystemCoreClockUpdate();
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uart_config(25000000ul);
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/* Generate interrupt each 1 ms */
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SysTick_Config(SystemCoreClock / 1000);
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}
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