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https://github.com/espressif/ESP8266_RTOS_SDK.git
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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
// Copyright 2018-2025 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <stdint.h>
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#include "esp_attr.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "driver/adc.h"
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#define ENTER_CRITICAL() portENTER_CRITICAL()
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#define EXIT_CRITICAL() portEXIT_CRITICAL()
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#define ADC_CHECK(a, str, ret_val) \
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if (!(a)) { \
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ESP_LOGE(TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str); \
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return (ret_val); \
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}
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extern uint16_t test_tout();
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extern void phy_adc_read_fast(uint16_t *adc_addr, uint16_t adc_num, uint8_t adc_clk_div);
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extern uint16_t phy_get_vdd33();
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uint16_t adc_read()
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{
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uint16_t ret = test_tout(0);
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if (ret != 0xFFFF) {
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// The working voltage of ADC is designed according to 1.1v. Later, the actual working voltage of ADC is increased to 1.2v, so this scale is added.
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ret = ret * 12 / 11;
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if (ret > 1023) {
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// 10-bit precision ADC
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ret = 1023;
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}
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}
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return ret;
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} |