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variant.cpp
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/*
Copyright (c) 2014-2015 Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "variant.h"
#include "Arduino.h"
const PinDescription g_APinDescription[] = {
/*
+------------+------------------+--------+-----------------+--------+-----------------------+---------+---------+--------+--------+----------+----------+
| Pin number | MKR Board pin | PIN | Notes | Peri.A | Peripheral B | Perip.C | Perip.D | Peri.E | Peri.F | Periph.G | Periph.H |
| | | | | EIC | ADC | AC | PTC | DAC | SERCOMx | SERCOMx | TCCx | TCCx | COM | AC/GLCK |
| | | | |(EXTINT)|(AIN)|(AIN)| | | (x/PAD) | (x/PAD) | (x/WO) | (x/WO) | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| 00 | D0 | PA22 | | *06 | | | X10 | | 3/00 | 5/00 |* TC4/0 | TCC0/4 | | GCLK_IO6 |
| 01 | D1 | PA23 | | *07 | | | X11 | | 3/01 | 5/01 |* TC4/1 | TCC0/5 | USB/SOF | GCLK_IO7 |
| 02 | D2 | PA10 | | 10 | *18 | | X02 | | 0/02 | 2/02 |*TCC1/0 | TCC0/2 | I2S/SCK0 | GCLK_IO4 |
| 03 | D3 | PA11 | | 11 | *19 | | X03 | | 0/03 | 2/03 |*TCC1/1 | TCC0/3 | I2S/FS0 | GCLK_IO5 |
| 04 | D4 | PB10 | | *10 | | | | | | 4/02 |* TC5/0 | TCC0/4 | I2S/MCK1 | GCLK_IO4 |
| 05 | D5 | PB11 | | *11 | | | | | | 4/03 |* TC5/1 | TCC0/5 | I2S/SCK1 | GCLK_IO5 |
| 06 | D6 | PA20 | LED_BUILTIN | *04 | | | X08 | | 5/02 | 3/02 | |*TCC0/6 | I2S/SCK0 | GCLK_IO4 |
| 07 | D7 | PA21 | | *05 | | | X09 | | 5/03 | 3/03 | |*TCC0/7 | I2S/FS0 | GCLK_IO5 |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
*/
{ PORTA, 22, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM4_CH0, TC4_CH0, EXTERNAL_INT_6 },
{ PORTA, 23, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM4_CH1, TC4_CH1, EXTERNAL_INT_7 },
{ PORTA, 10, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), ADC_Channel18, PWM1_CH0, TCC1_CH0, EXTERNAL_INT_NONE },
{ PORTA, 11, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), ADC_Channel19, PWM1_CH1, TCC1_CH1, EXTERNAL_INT_NONE },
{ PORTB, 10, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM5_CH0, TC5_CH0, EXTERNAL_INT_10 },
{ PORTB, 11, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM5_CH1, TC5_CH1, EXTERNAL_INT_11 },
{ PORTA, 20, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH6, TCC0_CH6, EXTERNAL_INT_4 },
{ PORTA, 21, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM0_CH7, TCC0_CH7, EXTERNAL_INT_5 },
/*
+------------+------------------+--------+-----------------+--------+-----------------------+---------+---------+--------+--------+----------+----------+
| Pin number | MKR Board pin | PIN | Notes | Peri.A | Peripheral B | Perip.C | Perip.D | Peri.E | Peri.F | Periph.G | Periph.H |
| | | | | EIC | ADC | AC | PTC | DAC | SERCOMx | SERCOMx | TCCx | TCCx | COM | AC/GLCK |
| | | | |(EXTINT)|(AIN)|(AIN)| | | (x/PAD) | (x/PAD) | (x/WO) | (x/WO) | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| | SPI | | | | | | | | | | | | | |
| 08 | MOSI | PA16 | | *00 | | | X04 | | *1/00 | 3/00 |*TCC2/0 | TCC0/6 | | GCLK_IO2 |
| 09 | SCK | PA17 | | *01 | | | X05 | | *1/01 | 3/01 | TCC2/1 | TCC0/7 | | GCLK_IO3 |
| 10 | MISO | PA19 | | 03 | | | X07 | | *1/03 | 3/03 |* TC3/1 | TCC0/3 | I2S/SD0 | AC/CMP1 |
+------------+------------------+--------+-----------------+--------------------+-----+-----+---------+---------+--------+--------+----------+----------+
| | Wire | | | | | | | | | | | | | |
| 11 | SDA | PA08 | | NMI | *16 | | X00 | | *0/00 | 2/00 | TCC0/0 | TCC1/2 | I2S/SD1 | |
| 12 | SCL | PA09 | | 09 | *17 | | X01 | | *0/01 | 2/01 | TCC0/1 | TCC1/3 | I2S/MCK0 | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| | Serial1 | | | | | | | | | | | | | |
| 13 | RX | PB23 | | 07 | | | | | | *5/03 | | | | GCLK_IO1 |
| 14 | TX | PB22 | | 06 | | | | | | *5/02 | | | | GCLK_IO0 |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
*/
// DIPO=3 DOPO=0
{ PORTA, 16, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM2_CH0, TCC2_CH0, EXTERNAL_INT_0 }, // MOSI: SERCOM1/PAD[0]
{ PORTA, 17, PIO_SERCOM, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_1 }, // SCK: SERCOM1/PAD[1]
{ PORTA, 19, PIO_SERCOM, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), No_ADC_Channel, PWM3_CH1, TC3_CH1, EXTERNAL_INT_NONE }, // MISO: SERCOM1/PAD[3]
// PINOUT=0
{ PORTA, 8, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), ADC_Channel16, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NMI }, // SDA: SERCOM2/PAD[0]
{ PORTA, 9, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), ADC_Channel17, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SCL: SERCOM2/PAD[1]
// RXPO=3 TXPO=1
{ PORTB, 23, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // RX: SERCOM5/PAD[3]
{ PORTB, 22, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // TX: SERCOM5/PAD[2]
/*
+------------+------------------+--------+-----------------+--------+-----------------------+---------+---------+--------+--------+----------+----------+
| Pin number | MKR Board pin | PIN | Notes | Peri.A | Peripheral B | Perip.C | Perip.D | Peri.E | Peri.F | Periph.G | Periph.H |
| | | | | EIC | ADC | AC | PTC | DAC | SERCOMx | SERCOMx | TCCx | TCCx | COM | AC/GLCK |
| | | | |(EXTINT)|(AIN)|(AIN)| | | (x/PAD) | (x/PAD) | (x/WO) | (x/WO) | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| 15 | A0 / DAC0 | PA02 | | 02 | *00 | | Y00 | OUT | | | | | | |
| 16 | A1 | PB02 | | *02 | *10 | | Y08 | | | 5/00 | | | | |
| 17 | A2 | PB03 | | *03 | *11 | | Y09 | | | 5/01 | | | | |
| 18 | A3 | PA04 | | 04 | *04 | 00 | Y02 | | | 0/00 |*TCC0/0 | | | |
| 19 | A4 | PA05 | | 05 | *05 | 01 | Y03 | | | 0/01 |*TCC0/1 | | | |
| 20 | A5 | PA06 | | 06 | *06 | 02 | Y04 | | | 0/02 | TCC1/0 | | | |
| 21 | A6 | PA07 | | 07 | *07 | 03 | Y05 | | | 0/03 | TCC1/1 | | I2S/SD0 | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
*/
{ PORTA, 2, PIO_ANALOG, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG /*DAC*/ ), ADC_Channel0, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
{ PORTB, 2, PIO_ANALOG, (PIN_ATTR_DIGITAL ), ADC_Channel10, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_2 },
{ PORTB, 3, PIO_ANALOG, (PIN_ATTR_DIGITAL ), ADC_Channel11, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_3 },
{ PORTA, 4, PIO_ANALOG, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), ADC_Channel4, PWM0_CH0, TCC0_CH0, EXTERNAL_INT_NONE },
{ PORTA, 5, PIO_ANALOG, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER ), ADC_Channel5, PWM0_CH1, TCC0_CH1, EXTERNAL_INT_NONE },
{ PORTA, 6, PIO_ANALOG, (PIN_ATTR_DIGITAL ), ADC_Channel6, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
{ PORTA, 7, PIO_ANALOG, (PIN_ATTR_DIGITAL ), ADC_Channel7, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
/*
+------------+------------------+--------+-----------------+--------+-----------------------+---------+---------+--------+--------+----------+----------+
| Pin number | MKR Board pin | PIN | Notes | Peri.A | Peripheral B | Perip.C | Perip.D | Peri.E | Peri.F | Periph.G | Periph.H |
| | | | | EIC | ADC | AC | PTC | DAC | SERCOMx | SERCOMx | TCCx | TCCx | COM | AC/GLCK |
| | | | |(EXTINT)|(AIN)|(AIN)| | | (x/PAD) | (x/PAD) | (x/WO) | (x/WO) | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| | USB | | | | | | | | | | | | | |
| 22 | | PA24 | USB N | 12 | | | | | 3/02 | 5/02 | TC5/0 | TCC1/2 | USB/DM | |
| 23 | | PA25 | USB P | 13 | | | | | 3/03 | 5/03 | TC5/1 | TCC1/3 | USB/DP | |
| 24 | | PA18 | USB ID | 02 | | | X06 | | 1/02 | 3/02 | TC3/0 | TCC0/2 | | AC/CMP0 |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| 25 | AREF | PA03 | | 03 | 01 | | Y01 | | | | | | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
*/
{ PORTA, 24, PIO_COM, (PIN_ATTR_NONE ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB/DM
{ PORTA, 25, PIO_COM, (PIN_ATTR_NONE ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // USB/DP
{ PORTA, 18, PIO_DIGITAL, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
{ PORTA, 3, PIO_DIGITAL, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // DAC/VREFP
/*
+------------+------------------+--------+-----------------+--------+-----------------------+---------+---------+--------+--------+----------+----------+
| Pin number | MKR Board pin | PIN | Notes | Peri.A | Peripheral B | Perip.C | Perip.D | Peri.E | Peri.F | Periph.G | Periph.H |
| | | | | EIC | ADC | AC | PTC | DAC | SERCOMx | SERCOMx | TCCx | TCCx | COM | AC/GLCK |
| | | | |(EXTINT)|(AIN)|(AIN)| | | (x/PAD) | (x/PAD) | (x/WO) | (x/WO) | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| | SD SPI | | | | | | | | | | | | | |
| 26 | | PA12 | GSM_TX | 12 | | | | | *2/00 | 4/00 | TCC2/0 | TCC0/6 | | AC/CMP0 |
| 27 | | PA13 | GSM_RX | 13 | | | | | *2/01 | 4/01 | TCC2/1 | TCC0/7 | | AC/CMP1 |
| 28 | | PA14 | GSM_RTS | 14 | | | | | 2/02 | 4/02 | TC3/0 | TCC0/4 | | GCLK_IO0 |
| 29 | | PA15 | GSM_CTS | 15 | | | | | *2/03 | 4/03 | TC3/1 | TCC0/5 | | GCLK_IO1 |
| 30 | | PA27 | PMIC_IRQ | *15 | | | | | | | | | | GCLK_IO0 |
| 31 | | PB08 | GSM_RESETN | 08 | 02 | | Y14 | | | 4/00 | TC4/0 | | | |
| 32 | | PB09 | ADC_VBAT | *09 | 03 | | Y15 | | | 4/01 | TC4/1 | | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| | 32768Hz Crystal | | | | | | | | | | | | | |
| 33 | | PA00 | XIN32 | 00 | | | | | | 1/00 | TCC2/0 | | | |
| 34 | | PA01 | XOUT32 | 01 | | | | | | 1/01 | TCC2/1 | | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
| 35 | | PA28 | GSM_DTR | 01 | | | | | | 1/01 | TCC2/1 | | | |
+------------+------------------+--------+-----------------+--------+-----+-----+-----+-----+---------+---------+--------+--------+----------+----------+
*/
// DIPO=3 DOPO=0
{ 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, 14, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // SS: as GPIO
{ PORTA, 15, PIO_SERCOM_ALT, (PIN_ATTR_DIGITAL ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }, // MISO: SERCOM4/PAD[3]
{ PORTA, 27, PIO_DIGITAL, (PIN_ATTR_NONE ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_15 },
{ PORTB, 8, PIO_DIGITAL, (PIN_ATTR_DIGITAL|PIN_ATTR_ANALOG ), ADC_Channel2, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
{ PORTB, 9, PIO_ANALOG, (PIN_ATTR_PWM|PIN_ATTR_TIMER ), ADC_Channel3, PWM4_CH1, TC4_CH1, EXTERNAL_INT_9 },
{ 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, 28, PIO_DIGITAL, (PIN_ATTR_NONE ), No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
};
const void* g_apTCInstances[TCC_INST_NUM + TC_INST_NUM]={ TCC0, TCC1, TCC2, TC3, TC4, TC5 };
extern "C" {
unsigned int PINCOUNT_fn() {
return (sizeof(g_APinDescription) / sizeof(g_APinDescription[0]));
}
}
// Multi-serial objects instantiation
SERCOM sercom0(SERCOM0);
SERCOM sercom1(SERCOM1);
SERCOM sercom2(SERCOM2);
SERCOM sercom3(SERCOM3);
SERCOM sercom4(SERCOM4);
SERCOM sercom5(SERCOM5);
#if defined(USE_BQ24195L_PMIC)
#include "wiring_private.h"
#define PMIC_ADDRESS 0x6B
#define PMIC_REG00 0x00
#define PMIC_REG01 0x01
#define PMIC_REG07 0x07
static inline void enable_battery_charging() {
PERIPH_WIRE.initMasterWIRE(100000);
PERIPH_WIRE.enableWIRE();
pinPeripheral(PIN_WIRE_SDA, g_APinDescription[PIN_WIRE_SDA].ulPinType);
pinPeripheral(PIN_WIRE_SCL, g_APinDescription[PIN_WIRE_SCL].ulPinType);
PERIPH_WIRE.startTransmissionWIRE( PMIC_ADDRESS, WIRE_WRITE_FLAG );
PERIPH_WIRE.sendDataMasterWIRE(PMIC_REG01);
PERIPH_WIRE.sendDataMasterWIRE(0x1B); // Charge Battery + Minimum System Voltage 3.5V
PERIPH_WIRE.prepareCommandBitsWire(WIRE_MASTER_ACT_STOP);
PERIPH_WIRE.disableWIRE();
}
static inline void set_voltage_current_thresholds() {
PERIPH_WIRE.initMasterWIRE(100000);
PERIPH_WIRE.enableWIRE();
pinPeripheral(PIN_WIRE_SDA, g_APinDescription[PIN_WIRE_SDA].ulPinType);
pinPeripheral(PIN_WIRE_SCL, g_APinDescription[PIN_WIRE_SCL].ulPinType);
PERIPH_WIRE.startTransmissionWIRE( PMIC_ADDRESS, WIRE_WRITE_FLAG );
PERIPH_WIRE.sendDataMasterWIRE(PMIC_REG00);
PERIPH_WIRE.sendDataMasterWIRE(0x06); // 3.880 V + 2A ILIM
PERIPH_WIRE.prepareCommandBitsWire(WIRE_MASTER_ACT_STOP);
PERIPH_WIRE.disableWIRE();
}
static inline void disable_battery_fet(bool disabled) {
PERIPH_WIRE.initMasterWIRE(100000);
PERIPH_WIRE.enableWIRE();
pinPeripheral(PIN_WIRE_SDA, g_APinDescription[PIN_WIRE_SDA].ulPinType);
pinPeripheral(PIN_WIRE_SCL, g_APinDescription[PIN_WIRE_SCL].ulPinType);
PERIPH_WIRE.startTransmissionWIRE( PMIC_ADDRESS, WIRE_WRITE_FLAG );
PERIPH_WIRE.sendDataMasterWIRE(PMIC_REG07);
// No D+/D– detection + Safety timer not slowed by 2X during input DPM or thermal regulation +
// BAT fet disabled/enabled + charge and bat fault INT
PERIPH_WIRE.sendDataMasterWIRE(0x0B | (disabled ? 0x20 : 0x00));
PERIPH_WIRE.prepareCommandBitsWire(WIRE_MASTER_ACT_STOP);
PERIPH_WIRE.disableWIRE();
}
#endif
void initVariant() {
#if defined(USE_BQ24195L_PMIC)
pinMode(ADC_BATTERY, OUTPUT);
digitalWrite(ADC_BATTERY, LOW);
delay(10);
pinMode(ADC_BATTERY, INPUT);
delay(100);
bool batteryPresent = analogRead(ADC_BATTERY) > 600;
if (batteryPresent) {
enable_battery_charging();
}
disable_battery_fet(!batteryPresent);
set_voltage_current_thresholds();
#endif
// power off the module
pinMode(SARA_PWR_ON, OUTPUT);
digitalWrite(SARA_PWR_ON, LOW);
// data sheet discourages use of SARA modem reset pin
// use may lead to irrecoverable state of modem
pinMode(SARA_RESETN, OUTPUT);
digitalWrite(SARA_RESETN, LOW);
// set RTS to LOW
pinMode(SARA_RTS, OUTPUT);
digitalWrite(SARA_RTS, LOW);
}
// Serial1
Uart Serial1(&sercom5, PIN_SERIAL1_RX, PIN_SERIAL1_TX, PAD_SERIAL1_RX, PAD_SERIAL1_TX);
__attribute__((weak)) void SERCOM5_Handler()
{
Serial1.IrqHandler();
}
// SerialSARA
Uart Serial2(&sercom4, PIN_SERIAL2_RX, PIN_SERIAL2_TX, PAD_SERIAL2_RX, PAD_SERIAL2_TX);
__attribute__((weak)) void SERCOM4_Handler()
{
Serial2.IrqHandler();
}