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https://github.com/0xFEEDC0DE64/arduino-esp32.git
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55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
// Copyright 2015-2016 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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// 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 "esp32-hal-dac.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "rom/ets_sys.h"
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#include "esp_attr.h"
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#include "esp_intr.h"
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#include "soc/rtc_io_reg.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/sens_reg.h"
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void IRAM_ATTR __dacWrite(uint8_t pin, uint8_t value)
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{
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if(pin < 25 || pin > 26){
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return;//not dac pin
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}
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pinMode(pin, ANALOG);
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uint8_t channel = pin - 25;
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//Disable Tone
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CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
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if (channel) {
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//Disable Channel Tone
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CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
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//Set the Dac value
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SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, value, RTC_IO_PDAC2_DAC_S); //dac_output
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//Channel output enable
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SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
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} else {
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//Disable Channel Tone
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CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN1_M);
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//Set the Dac value
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SET_PERI_REG_BITS(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC, value, RTC_IO_PDAC1_DAC_S); //dac_output
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//Channel output enable
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SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
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}
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}
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extern void dacWrite(uint8_t pin, uint8_t value) __attribute__ ((weak, alias("__dacWrite")));
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