fix enable ADC on pin37,38 (espressif#822)

Author: radiumray

cores/esp32/esp32-hal-gpio.c

@@ -24,7 +24,7 @@
 #include "soc/gpio_struct.h"
 #include "soc/rtc_io_reg.h"
 
-const int8_t esp32_adc2gpio[20] = {36, -1, -1, 39, 32, 33, 34, 35, -1, -1, 4, 0, 2, 15, 13, 12, 14, 27, 25, 26};
+const int8_t esp32_adc2gpio[20] = {36, 37, 38, 39, 32, 33, 34, 35, -1, -1, 4, 0, 2, 15, 13, 12, 14, 27, 25, 26};
 
 const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[GPIO_PIN_COUNT]={
     {0x44, 11, 11, 1},
@@ -64,8 +64,8 @@ const DRAM_ATTR esp32_gpioMux_t esp32_gpioMux[GPIO_PIN_COUNT]={
     {0x14, 4, 6, -1},
     {0x18, 5, 7, -1},
     {0x04, 0, 0, -1},
-    {0x08, 1, -1, -1},
-    {0x0c, 2, -1, -1},
+    {0x08, 1, 1, -1},
+    {0x0c, 2, 2, -1},
     {0x10, 3, 3, -1}
 };