8f26d181c3
Everything works fine without USB being plugged in but faults (I think) when USB is plugged in. This is switched away from the USB code from the bootloader onto the USB code thats generated by Atmel Studio using the high level classes from ASF.
114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/**
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* \file
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*
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* \brief ARM functions for busy-wait delay loops
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*
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* Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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/*
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* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
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*/
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#ifndef CYCLE_COUNTER_H_INCLUDED
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#define CYCLE_COUNTER_H_INCLUDED
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#include <compiler.h>
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#include <clock.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \name Convenience functions for busy-wait delay loops
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*
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* @{
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*/
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/**
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* \brief Delay loop to delay n number of cycles
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* Delay program execution for at least the specified number of CPU cycles.
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*
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* \param n Number of cycles to delay
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*/
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static inline void delay_cycles(
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const uint32_t n)
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{
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if (n > 0) {
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SysTick->LOAD = n;
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SysTick->VAL = 0;
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while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk)) {
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};
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}
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}
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void delay_cycles_us(uint32_t n);
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void delay_cycles_ms(uint32_t n);
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/**
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* \brief Delay program execution for at least the specified number of microseconds.
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*
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* \param delay number of microseconds to wait
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*/
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#define cpu_delay_us(delay) delay_cycles_us(delay)
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/**
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* \brief Delay program execution for at least the specified number of milliseconds.
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*
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* \param delay number of milliseconds to wait
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*/
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#define cpu_delay_ms(delay) delay_cycles_ms(delay)
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/**
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* \brief Delay program execution for at least the specified number of seconds.
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*
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* \param delay number of seconds to wait
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*/
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#define cpu_delay_s(delay) delay_cycles_ms(1000 * delay)
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* CYCLE_COUNTER_H_INCLUDED */
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