1 // Copyright 2020 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include "soc/lldesc.h" 18 #include "soc/soc_caps.h" 19 #include "esp_err.h" 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 /** 26 * @brief Start the DMA engine 27 * 28 * @param input AES input descriptor (outlink) 29 * @param output AES output descriptor (inlink) 30 * @return 31 * - ESP_OK: Successfully started the DMA 32 * - ESP_ERR_INVALID_STATE: No DMA channel available 33 */ 34 esp_err_t esp_aes_dma_start(const lldesc_t *input, const lldesc_t *output); 35 36 /** 37 * @brief Check if the DMA engine is finished reading the result 38 * 39 * @param output AES output descriptor (inlink) 40 * @return 41 * - true: DMA finished 42 * - false: DMA not yet finished 43 */ 44 bool esp_aes_dma_done(const lldesc_t *output); 45 46 #ifdef __cplusplus 47 } 48 #endif 49
