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Convert pin to ADC1 channel.

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This commit is contained in:
anecdata
2019-10-14 00:32:48 -05:00
parent 5687201ec9
commit b9c66fa1b1
1 changed files with 26 additions and 2 deletions
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28
arduino/cores/esp32/wiring_analog.c
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@@ -19,6 +19,7 @@
#include <driver/ledc.h>
#include <driver/adc.h>
#include <soc/adc_channel.h>
#include "wiring_analog.h"
@@ -47,8 +48,31 @@ void analogWrite(uint32_t pin, uint32_t value)
int analogRead(uint32_t pin)
{
int channel;
switch(pin)
{
case ADC1_CHANNEL_0_GPIO_NUM:
channel = ADC1_GPIO36_CHANNEL;
case ADC1_CHANNEL_1_GPIO_NUM:
channel = ADC1_GPIO37_CHANNEL;
case ADC1_CHANNEL_2_GPIO_NUM:
channel = ADC1_GPIO38_CHANNEL;
case ADC1_CHANNEL_3_GPIO_NUM:
channel = ADC1_GPIO39_CHANNEL;
case ADC1_CHANNEL_4_GPIO_NUM:
channel = ADC1_GPIO32_CHANNEL;
case ADC1_CHANNEL_5_GPIO_NUM:
channel = ADC1_GPIO33_CHANNEL;
case ADC1_CHANNEL_6_GPIO_NUM:
channel = ADC1_GPIO34_CHANNEL;
case ADC1_CHANNEL_7_GPIO_NUM:
channel = ADC1_GPIO35_CHANNEL;
default:
return -1;
}
adc1_config_width(ADC_WIDTH_BIT_12);
adc1_config_channel_atten(pin,ADC_ATTEN_DB_11);
int val = adc1_get_raw(pin);
adc1_config_channel_atten(channel, ADC_ATTEN_DB_11);
int val = adc1_get_raw(channel);
return val;
}