| // Copyright (c) 2010, Atmel Corporation. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // * Neither the name of Atmel nor the |
| // names of its contributors may be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY |
| // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include <stdint.h> |
| #include "SHA_TimeUtils.h" |
| |
| |
| // The values below are valid for an AVR 8-bit processor running at 16 MHz. |
| // Code is compiled with -O1. |
| |
| //!< Offsets time needed to prepare microseconds loop. |
| #define SHA_TIME_OFFSET_US (7) |
| |
| //!< Fill a while loop with these CPU instructions to achieve 1 us per iteration. |
| #define SHA_TIME_LOOP_FILLER asm volatile ("nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop") |
| |
| |
| extern void SA_Delay(uint32_t delay); |
| |
| |
| |
| |
| |
| |
| /** \brief Delays for a certain amount of time. |
| * |
| * \param[in] delay Delay for this number of microseconds (us). |
| */ |
| void SHAP_Delay(uint32_t delay) { |
| if (delay <= SHA_TIME_OFFSET_US) |
| // We spent already this much time entering this function. |
| // With other words: A value <= SHA_TIME_OFFSET_US will not produce the desired delay. |
| return; |
| |
| delay -= SHA_TIME_OFFSET_US; |
| |
| |
| SA_Delay(delay); |
| |
| return; |
| } |
| |
| |
| void loop_delay(int8_t multp) { |
| int i, base = 2000000 *multp; |
| for(i=0;i<base;i++) { |
| double value = 10.0; //((i * 33.3) - 12.1) / 10.0; |
| value += 1.0; |
| } |
| } |