Merge pull request #5 from sandeepmistry/updates

Various updates

Author: facchinm

README.md

@@ -0,0 +1,63 @@
+# Arduino Core for ATMEGA4809 CPU
+
+This repository contains the source code and configuration files of the Arduino Core
+for Microchip's ATMEGA4809 processor (used on the Arduino Uno WiFi Rev2 boards).
+
+## Installation on Arduino IDE
+
+This core is available as a package in the Arduino IDE cores manager.
+Just open the "Boards Manager" and install the package called:
+
+"Arduino megaAVR Boards"
+
+## Support
+
+There is a dedicated section of the Arduino Forum for general discussion and project assistance:
+
+http://forum.arduino.cc/index.php?board=126.0
+
+## Bugs or Issues
+
+If you find a bug you can submit an issue here on github:
+
+https://github.com/arduino/ArduinoCore-megaavr/issues
+
+Before posting a new issue, please check if the same problem has been already reported by someone else
+to avoid duplicates.
+
+## Contributions
+
+Contributions are always welcome. The preferred way to receive code cotribution is by submitting a 
+Pull Request on github.
+
+## Developing
+
+1. Create an `<SKETCHBOOK>/hardware/arduino` folder. Where `<SKETCHBOOK>` is the location of your
+  Arduino sketchbook.
+1. Change directories: `cd <SKETCHBOOK>/hardware/arduino`
+1. Clone this repo: `git clone https://github.com/arduino/ArduinoCore-megaavr.git megaavr`
+1. Change directories: `cd megaavr/cores/arduino`
+1. Copy or symlink the `api` folder from the [ArduinoCore-API](https://github.com/arduino/ArduinoCore-API) repo.
+1. Restart the IDE
+
+## License and credits
+
+This core has been developed by Arduino SA in collaboration with Microchip.
+
+```
+  Copyright (c) 2018 Arduino SA.  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
+```

boards.txt

@@ -9,7 +9,7 @@ uno2018.pid.0=0x2145
 
 uno2018.upload.tool=avrdude
 uno2018.upload.protocol=xplainedmini_updi
-uno2018.upload.maximum_size=37168
+uno2018.upload.maximum_size=49152
 uno2018.upload.maximum_data_size=6144
 uno2018.upload.speed=115200
 

cores/arduino/UART.cpp

@@ -134,9 +134,7 @@ void UartClass::begin(unsigned long baud, uint16_t config)
     // Setup port mux
     PORTMUX.USARTROUTEA |= _uart_mux;
 
-    //uint16_t baud_setting = 0;
     int32_t baud_setting = 0;
-    uint8_t error = 0;
 
     //Make sure global interrupts are disabled during initialization
     uint8_t oldSREG = SREG;

platform.txt

@@ -18,7 +18,7 @@ compiler.warning_flags.more=-Wall
 compiler.warning_flags.all=-Wall -Wextra
 
 # Default "compiler.path" is correct, change only if you want to override the initial value
-compiler.path={runtime.tools.avr-gcc.path}/bin/
+compiler.path={runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path}/bin/
 compiler.c.cmd=avr-gcc
 compiler.c.flags=-c -g -Os {compiler.warning_flags} -std=gnu11 -ffunction-sections -fdata-sections -MMD -flto -fno-fat-lto-objects
 compiler.c.elf.flags={compiler.warning_flags} -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections

variants/uno2018/pins_arduino.h

@@ -117,6 +117,8 @@ static const uint8_t A5 = PIN_A5;
 #define NINA_GPIO0		(28u)
 #define NINA_RESETN		(29u)
 #define NINA_ACK		(36u)
+#define NINA_CTS		NINA_ACK
+#define NINA_RTS		NINA_GPIO0
 
 #define SPIWIFI_SS		(35u)
 #define SPIWIFI_ACK		NINA_ACK

variants/uno2018/variant.c

@@ -81,6 +81,8 @@ void setup_timers() {
 }
 
 FORCE_INLINE bool isDoubleBondedActive(uint8_t pin) {
+	(void)pin;
+
 	/* Check if TWI is operating on double bonded pin (Master Enable is high 
 	in both Master and Slave mode for bus error detection, so this can 
 	indicate an active state for Wire) */