ESP-IDF
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Outline
#include <esp_types.h>
#include "sdkconfig.h"
#include "esp_log.h"
#include "esp_err.h"
#include "freertos/FreeRTOS.h"
dvp_signal_used
s_spinlock
dvp_shared_ctrl_claim_io_signals()
dvp_shared_ctrl_declaim_io_signals()
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_driver_cam/dvp_share_ctrl.c
 
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/* * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include <esp_types.h> #include "sdkconfig.h" #include "esp_log.h" #include "esp_err.h" #include "freertos/FreeRTOS.h"5 includes bool dvp_signal_used; static portMUX_TYPE s_spinlock = portMUX_INITIALIZER_UNLOCKED; esp_err_t dvp_shared_ctrl_claim_io_signals(void) { esp_err_t ret = ESP_ERR_NOT_FOUND; portENTER_CRITICAL(&s_spinlock); if (!dvp_signal_used) { dvp_signal_used = true; ret = ESP_OK; }{...} portEXIT_CRITICAL(&s_spinlock); return ret; }{ ... } esp_err_t dvp_shared_ctrl_declaim_io_signals(void) { portENTER_CRITICAL(&s_spinlock); dvp_signal_used = false; portEXIT_CRITICAL(&s_spinlock); return ESP_OK; }{ ... }
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