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ADC esp32s2 attenuation fix for DAC pins #6282

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Feb 16, 2022
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8 changes: 5 additions & 3 deletions cores/esp32/esp32-hal-adc.c
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
#include "soc/rtc_io_reg.h"
#include "esp32/rom/ets_sys.h"
#include "esp_intr_alloc.h"
#include "soc/dac_channel.h"
#define DEFAULT_VREF 1100
static esp_adc_cal_characteristics_t *__analogCharacteristics[2] = {NULL, NULL};
static uint16_t __analogVRef = 0;
Expand All @@ -35,6 +36,7 @@ static uint8_t __analogVRefPin = 0;
#include "esp32s2/rom/ets_sys.h"
#include "soc/sens_reg.h"
#include "soc/rtc_io_reg.h"
#include "soc/dac_channel.h"
#elif CONFIG_IDF_TARGET_ESP32C3
#include "esp32c3/rom/ets_sys.h"
#else
Expand Down Expand Up @@ -141,10 +143,10 @@ bool __adcAttachPin(uint8_t pin){
}
#endif
}
#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
else if(pin == 25){
#if SOC_DAC_SUPPORTED
else if(pin == DAC_CHANNEL_1_GPIO_NUM){
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);//stop dac1
} else if(pin == 26){
} else if(pin == DAC_CHANNEL_2_GPIO_NUM){
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);//stop dac2
}
#endif
Expand Down