start defining some wifi pads

Author: ladyada

variants/pyportal_m4/variant.cpp

@@ -113,8 +113,8 @@ const PinDescription g_APinDescription[]=
   { PORTA, 24, PIO_COM       , PIN_ATTR_NONE                   , No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB D-
   { PORTA, 25, PIO_COM       , PIN_ATTR_NONE                   , No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB D+
 
-  // 50..51  TFT alt WR lines for testing
-  { PORTB, 17, PIO_DIGITAL   , PIN_ATTR_PWM_E                  , No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_1    }, // TFT_WR3, CCL/OUT[3]
+  // 50..51
+  { PORTB, 17, PIO_DIGITAL   , PIN_ATTR_PWM_E                  , No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_1    }, // ESP RTS
   { PORTB, 23, PIO_DIGITAL   , PIN_ATTR_PWM_E                  , No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_7    }, // TFT_WR4, CCL/OUT[0]
 
 } ;

variants/pyportal_m4/variant.h

@@ -123,15 +123,21 @@ static const uint8_t DAC0 = PIN_DAC0;
 #define PIN_ATN              (39ul)  // ???
 static const uint8_t ATN = PIN_ATN;
 
+/* WiFi interfaces */
+#define SerialNina Serial1
+#define NINA_GPIO0    6
+#define NINA_RESETN   7
+
 /*
  * Serial interfaces
  */
 
 // Serial1
 #define PIN_SERIAL1_RX       (0ul)
 #define PIN_SERIAL1_TX       (1ul)
-#define PAD_SERIAL1_TX       (UART_TX_PAD_0)
 #define PAD_SERIAL1_RX       (SERCOM_RX_PAD_1)
+#define PAD_SERIAL1_TX       (UART_TX_PAD_0)
+
 
 /*
  * SPI Interfaces