add SPI flash SS pin

Author: ladyada

variants/metro_m0/variant.cpp

@@ -181,15 +181,17 @@ const PinDescription g_APinDescription[]=
   { PORTB, 03, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },  // SPI Flash MISO
   { PORTB, 22, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },  // SPI FLash MOSI
   { PORTB, 23, PIO_SERCOM_ALT, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },  // SPI FLash SCK
+  // 39 Secondary SPI SS
+  { PORTA, 13, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_13 }, // SPI Flash SS
 
-  // 39 - Internal NeoPixel
+  // 40 - Internal NeoPixel
   { PORTA, 30, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // used as output only
 
-  // 40 (AREF)
+  // 41 (AREF)
   { PORTA, 3, PIO_ANALOG, PIN_ATTR_ANALOG, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // DAC/VREFP
 
   // ----------------------
-  // 41 - Alternate use of A0 (DAC output)
+  // 42 - Alternate use of A0 (DAC output)
   { PORTA,  2, PIO_ANALOG, PIN_ATTR_ANALOG, DAC_Channel0, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 }, // DAC/VOUT
 } ;
 

variants/metro_m0/variant.h

@@ -136,7 +136,7 @@ static const uint8_t ATN = PIN_ATN;
 /*
  * SPI Interfaces
  */
-#define SPI_INTERFACES_COUNT 1
+#define SPI_INTERFACES_COUNT 2
 
 #define PIN_SPI_MISO         (28u)
 #define PIN_SPI_MOSI         (29u)
@@ -150,6 +150,20 @@ static const uint8_t MOSI = PIN_SPI_MOSI ;
 static const uint8_t MISO = PIN_SPI_MISO ;
 static const uint8_t SCK  = PIN_SPI_SCK ;
 
+
+#define PIN_SPI1_MISO         (36u)
+#define PIN_SPI1_MOSI         (37u)
+#define PIN_SPI1_SCK          (38u)
+#define PERIPH_SPI1           sercom5
+#define PAD_SPI1_TX           SPI_PAD_2_SCK_3
+#define PAD_SPI1_RX           SERCOM_RX_PAD_1
+
+static const uint8_t SS1   = 39 ;	// HW SS isn't used. Set here only for reference.
+static const uint8_t MOSI1 = PIN_SPI_MOSI ;
+static const uint8_t MISO1 = PIN_SPI_MISO ;
+static const uint8_t SCK1  = PIN_SPI_SCK ;
+
+
 /*
  * Wire Interfaces
  */