| /* |
| * ------------------------------------------- |
| * CC3220 SDK - v0.10.00.00 |
| * ------------------------------------------- |
| * |
| * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ |
| * |
| * 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 Texas Instruments Incorporated 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 |
| * OWNER OR CONTRIBUTORS 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. |
| * |
| */ |
| //***************************************************************************** |
| // |
| // utils.c |
| // |
| // Utility APIs |
| // |
| //***************************************************************************** |
| |
| //***************************************************************************** |
| // |
| //! \addtogroup Utils_api |
| //! @{ |
| // |
| //***************************************************************************** |
| #include "utils.h" |
| |
| |
| //***************************************************************************** |
| // |
| //! Provides a small delay. |
| //! |
| //! \param ulCount is the number of delay loop iterations to perform. |
| //! |
| //! This function provides a means of generating a constant length delay. It |
| //! is written in assembly to keep the delay consistent across tool chains, |
| //! avoiding the need to tune the delay based on the tool chain in use. |
| //! |
| //! The loop takes 3 cycles/loop. |
| //! |
| //! \return None. |
| // |
| //***************************************************************************** |
| #if defined(ewarm) || defined(DOXYGEN) |
| void |
| UtilsDelay(unsigned long ulCount) |
| { |
| __asm(" subs r0, #1\n" |
| " bne.n UtilsDelay\n"); |
| } |
| #endif |
| |
| #if defined(gcc) |
| void __attribute__((naked)) |
| UtilsDelay(unsigned long ulCount) |
| { |
| __asm(" subs r0, #1\n" |
| " bne UtilsDelay\n" |
| " bx lr"); |
| } |
| #endif |
| |
| // |
| // For CCS implement this function in pure assembly. This prevents the TI |
| // compiler from doing funny things with the optimizer. |
| // |
| #if defined(ccs) |
| __asm(" .sect \".text:UtilsDelay\"\n" |
| " .clink\n" |
| " .thumbfunc UtilsDelay\n" |
| " .thumb\n" |
| " .global UtilsDelay\n" |
| "UtilsDelay:\n" |
| " subs r0, #1\n" |
| " bne.n UtilsDelay\n" |
| " bx lr\n"); |
| #endif |
| |
| //***************************************************************************** |
| // |
| // Close the Doxygen group. |
| //! @} |
| // |
| //***************************************************************************** |
