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authorjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
committerjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
commit2628932a40d769d8d0180ba6fed1e7b9b2718982 (patch)
treeea485897653003d01cd16e2b506f69363928fafa /Blink/Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_pid_init_q15.c
parent972da3c0fd449dd6153edaf3c56e0c50d16b726b (diff)
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-/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_pid_init_q15.c
- * Description: Q15 PID Control initialization function
- *
- * $Date: 27. January 2017
- * $Revision: V.1.5.1
- *
- * Target Processor: Cortex-M cores
- * -------------------------------------------------------------------- */
-/*
- * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an AS IS BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "arm_math.h"
-
- /**
- * @addtogroup PID
- * @{
- */
-
-/**
- * @details
- * @param[in,out] *S points to an instance of the Q15 PID structure.
- * @param[in] resetStateFlag flag to reset the state. 0 = no change in state 1 = reset the state.
- * @return none.
- * \par Description:
- * \par
- * The <code>resetStateFlag</code> specifies whether to set state to zero or not. \n
- * The function computes the structure fields: <code>A0</code>, <code>A1</code> <code>A2</code>
- * using the proportional gain( \c Kp), integral gain( \c Ki) and derivative gain( \c Kd)
- * also sets the state variables to all zeros.
- */
-
-void arm_pid_init_q15(
- arm_pid_instance_q15 * S,
- int32_t resetStateFlag)
-{
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- /* Derived coefficient A0 */
- S->A0 = __QADD16(__QADD16(S->Kp, S->Ki), S->Kd);
-
- /* Derived coefficients and pack into A1 */
-
-#ifndef ARM_MATH_BIG_ENDIAN
-
- S->A1 = __PKHBT(-__QADD16(__QADD16(S->Kd, S->Kd), S->Kp), S->Kd, 16);
-
-#else
-
- S->A1 = __PKHBT(S->Kd, -__QADD16(__QADD16(S->Kd, S->Kd), S->Kp), 16);
-
-#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
-
- /* Check whether state needs reset or not */
- if (resetStateFlag)
- {
- /* Clear the state buffer. The size will be always 3 samples */
- memset(S->state, 0, 3U * sizeof(q15_t));
- }
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- q31_t temp; /*to store the sum */
-
- /* Derived coefficient A0 */
- temp = S->Kp + S->Ki + S->Kd;
- S->A0 = (q15_t) __SSAT(temp, 16);
-
- /* Derived coefficients and pack into A1 */
- temp = -(S->Kd + S->Kd + S->Kp);
- S->A1 = (q15_t) __SSAT(temp, 16);
- S->A2 = S->Kd;
-
-
-
- /* Check whether state needs reset or not */
- if (resetStateFlag)
- {
- /* Clear the state buffer. The size will be always 3 samples */
- memset(S->state, 0, 3U * sizeof(q15_t));
- }
-
-#endif /* #if defined (ARM_MATH_DSP) */
-
-}
-
-/**
- * @} end of PID group
- */