Merge branch 'master' of https://github.com/arduino/ArduinoCore-samd

Author: ladyada

Diff for: CHANGELOG

@@ -1,5 +1,11 @@
 SAMD CORE ?.?.?? ????.??.??
 
+SAMD CORE 1.6.21 2019.04.01
+
+* MKR boards: changed I2C to sercom2, SPI1 + Serial2 to sercom4
+* Improved accuracy of delay() function. Thanks @BenF
+* MKR 1500: Changed SARA module to be powered off on boot
+
 SAMD CORE 1.6.20 2018.11.28
 
 * Replaced boolean type with bool in examples. Thanks @per1234

Diff for: platform.txt

@@ -20,7 +20,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5---3rd-party-Hardware-specification
 
 name=Adafruit SAMD (32-bits ARM Cortex-M0+ and Cortex-M4) Boards
-version=1.3.0
+version=1.4.0
 
 # Compile variables
 # -----------------

Diff for: variants/mkrwan1300/variant.cpp

@@ -156,9 +156,9 @@ const PinDescription g_APinDescription[] = {
   { PORTA,  0, PIO_DIGITAL,    (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
   { PORTA,  1, PIO_DIGITAL,    (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
 
-  { PORTA, 12, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MOSI: SERCOM4/PAD[0]
-  { PORTA, 13, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCK:  SERCOM4/PAD[1]
-  { PORTA, 15, PIO_SERCOM,      (PIN_ATTR_NONE                               ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM4/PAD[3]
+  { PORTA, 12, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MOSI: SERCOM4/PAD[0]
+  { PORTA, 13, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCK:  SERCOM4/PAD[1]
+  { PORTA, 15, PIO_SERCOM_ALT, (PIN_ATTR_NONE                                ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM4/PAD[3]
 };
 
 const void* g_apTCInstances[TCC_INST_NUM + TC_INST_NUM]={ TCC0, TCC1, TCC2, TC3, TC4, TC5 };