v2.0.0 Add support for ESP32S2 and update ESP-IDF to 4.4 (#4996)

This is very much still work in progress and much more will change before the final 2.0.0

Some APIs have changed. New libraries have been added. LittleFS included.

Co-authored-by: Seon Rozenblum <seonr@3sprockets.com>
Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>
Co-authored-by: geeksville <kevinh@geeksville.com>
Co-authored-by: Mike Dunston <m_dunston@comcast.net>
Co-authored-by: Unexpected Maker <seon@unexpectedmaker.com>
Co-authored-by: Seon Rozenblum <seonr@3sprockets.com>
Co-authored-by: microDev <70126934+microDev1@users.noreply.github.com>
Co-authored-by: tobozo <tobozo@users.noreply.github.com>
Co-authored-by: bobobo1618 <bobobo1618@users.noreply.github.com>
Co-authored-by: lorol <lorolouis@gmail.com>
Co-authored-by: geeksville <kevinh@geeksville.com>
Co-authored-by: Limor "Ladyada" Fried <limor@ladyada.net>
Co-authored-by: Sweety <switi.mhaiske@espressif.com>
Co-authored-by: Loick MAHIEUX <loick111@gmail.com>
Co-authored-by: Larry Bernstone <lbernstone@gmail.com>
Co-authored-by: Valerii Koval <valeros@users.noreply.github.com>
Co-authored-by: 快乐的我531 <2302004040@qq.com>
Co-authored-by: chegewara <imperiaonline4@gmail.com>
Co-authored-by: Clemens Kirchgatterer <clemens@1541.org>
Co-authored-by: Aron Rubin <aronrubin@gmail.com>
Co-authored-by: Pete Lewis <601236+lewispg228@users.noreply.github.com>

tools/sdk/esp32s2/include/esp-dsp/modules/math/add/include/dsps_add.h

@@ -0,0 +1,78 @@
+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// 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
+//
+//     http://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.
+
+#ifndef _dsps_add_H_
+#define _dsps_add_H_
+#include "dsp_err.h"
+
+#include "dsps_add_platform.h"
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+/**@{*/
+/**
+ * @brief   add two arrays
+ *
+ * The function add one input array to another
+ * out[i*step_out] = input1[i*step1] + input2[i*step2]; i=[0..len)
+ * The implementation use ANSI C and could be compiled and run on any platform
+ *
+ * @param[in] input1: input array 1
+ * @param[in] input2: input array 2
+ * @param output: output array
+ * @param len: amount of operations for arrays
+ * @param step1: step over input array 1 (by default should be 1)
+ * @param step2: step over input array 2 (by default should be 1)
+ * @param step_out: step over output array (by default should be 1)
+ *
+ * @return
+ *      - ESP_OK on success
+ *      - One of the error codes from DSP library
+ */
+esp_err_t dsps_add_f32_ansi(const float *input1, const float *input2, float *output, int len, int step1, int step2, int step_out);
+esp_err_t dsps_add_f32_ae32(const float *input1, const float *input2, float *output, int len, int step1, int step2, int step_out);
+
+esp_err_t dsps_add_s16_ansi(const int16_t *input1, const int16_t *input2, int16_t *output, int len, int step1, int step2, int step_out, int shift);
+esp_err_t dsps_add_s16_ae32(const int16_t *input1, const int16_t *input2, int16_t *output, int len, int step1, int step2, int step_out, int shift);
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#if CONFIG_DSP_OPTIMIZED
+
+#if (dsps_add_f32_ae32_enabled == 1)
+#define dsps_add_f32 dsps_add_f32_ae32
+#else
+#define dsps_add_f32 dsps_add_f32_ansi
+#endif
+
+#if (dsps_add_s16_ae32_enabled == 1)
+#define dsps_add_s16 dsps_add_s16_ae32
+#else
+#define dsps_add_s16 dsps_add_s16_ansi
+#endif
+
+#else // CONFIG_DSP_OPTIMIZED
+#define dsps_add_f32 dsps_add_f32_ansi
+#define dsps_add_s16 dsps_add_s16_ansi
+#endif // CONFIG_DSP_OPTIMIZED
+
+#endif // _dsps_add_H_

tools/sdk/esp32s2/include/esp-dsp/modules/math/add/include/dsps_add_platform.h

@@ -0,0 +1,19 @@
+#ifndef _dsps_add_platform_H_
+#define _dsps_add_platform_H_
+
+#include <xtensa/config/core-isa.h>
+#include <xtensa/config/core-matmap.h>
+
+
+#if ((XCHAL_HAVE_FP == 1) && (XCHAL_HAVE_LOOPS == 1))
+
+#define dsps_add_f32_ae32_enabled  1
+
+#endif
+
+#if (XCHAL_HAVE_LOOPS == 1)
+#define dsps_add_s16_ae32_enabled  1
+#endif
+
+
+#endif // _dsps_add_platform_H_