boards/atmega256rfr2-xpro: initial support

boards/atmega256rfr2-xpro/Makefile

@@ -0,0 +1,5 @@
+MODULE = board
+
+DIRS = $(RIOTBOARD)/common/atmega
+
+include $(RIOTBASE)/Makefile.base

boards/atmega256rfr2-xpro/Makefile.dep

@@ -0,0 +1,7 @@
+USEMODULE += boards_common_atmega
+
+ifneq (,$(filter saul_default,$(USEMODULE)))
+  # I2C sensor available at address 0x4B
+  USEMODULE += at30tse75x
+  USEMODULE += saul_gpio
+endif

boards/atmega256rfr2-xpro/Makefile.features

@@ -0,0 +1,7 @@
+CPU = atmega256rfr2
+
+FEATURES_PROVIDED += periph_adc
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_timer
+FEATURES_PROVIDED += periph_uart

boards/atmega256rfr2-xpro/Makefile.include

@@ -0,0 +1,14 @@
+# configure the terminal program
+PORT_LINUX ?= /dev/ttyACM0
+PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
+BAUD ?= 9600
+include $(RIOTMAKE)/tools/serial.inc.mk
+
+# Use EDBG (xplainedpro) programmer with avrdude
+PROGRAMMER ?= xplainedpro
+
+# This board can be reset via avrdude
+RESET ?= avrdude -c $(PROGRAMMER) -p m256rfr2
+
+include $(RIOTMAKE)/tools/avrdude.inc.mk
+include $(RIOTBOARD)/common/atmega/Makefile.include

boards/atmega256rfr2-xpro/doc.txt

@@ -0,0 +1,29 @@
+/**
+@defgroup    boards_atmega256rfr2-xpro Atmega256RFR2 Xplained Pro
+@ingroup     boards
+@brief       Support for the Atmega256RFR2 Xplained Pro board
+
+### General information
+
+The [Atmega256RFR2 Xplained Pro](https://www.microchip.com/DevelopmentTools/ProductDetails/ATMEGA256RFR2-XPRO)
+is an evaluation kit by Microchip for their ATmega256RFR2 microcontroller.
+
+### Flash the board
+
+You can flash the board using the on-board EDBG programmer via JTAG. Avrdude has
+support for programming an AVR via EDBG with its xplainedpro programmer:
+
+```
+make BOARD=atmega256rfr2-xpro -C examples/hello-world flash
+```
+
+### Accessing STDIO via UART
+
+STDIO can be accessed through the USB connector. The on-board UART-USB
+adapter is not affected by flashing. It shows up as /dev/ttyACM0 on Linux.
+It will be used automatically with `make term`:
+```
+make BOARD=atmega256rfr2-xpro -C examples/hello-world term
+```
+
+*/

boards/atmega256rfr2-xpro/include/board.h

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2019 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_atmega256rfr2-xpro
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the Atmega256RFR2 Xplained Pro
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+#include "periph/gpio.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    STDIO configuration
+ *
+ * As the CPU is too slow to handle 115200 baud, we set the default
+ * baudrate to 9600 for this board
+ * @{
+ */
+#define STDIO_UART_BAUDRATE (9600U)
+/** @} */
+
+/**
+ * @brief   Use the UART 1 for STDIO on this board
+ */
+#define STDIO_UART_DEV       (UART_DEV(1))
+
+/**
+ * @name    xtimer configuration values
+ *
+ * Xtimer runs at 8MHz / 64 = 125kHz
+ * @{
+ */
+#define XTIMER_DEV                  (0)
+#define XTIMER_CHAN                 (0)
+#define XTIMER_WIDTH                (16)
+#define XTIMER_HZ                   (125000UL)
+#define XTIMER_BACKOFF              (40)
+/** @} */
+
+/**
+ * @name    Macros for controlling the on-board LED
+ * @{
+ */
+#define LED0_PIN            GPIO_PIN(PORT_B, 4)
+#define LED0_MODE           GPIO_OUT
+#define LED0_ENABLE_PORT    DDRB  |=  LED0_PIN
+#define LED0_ON             PORTB |=  LED0_PIN
+#define LED0_OFF            PORTB &= ~LED0_PIN
+#define LED0_TOGGLE         PORTB ^=  LED0_PIN
+/** @} */
+
+/**
+ * @name    Button pin configuration
+ * @{
+ */
+#define BTN0_PIN     GPIO_PIN(PORT_E, 4)
+#define BTN0_MODE    GPIO_IN_PU
+/** @} */
+
+/**
+ * @brief   Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/atmega256rfr2-xpro/include/gpio_params.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_atmega256rfr2-xpro
+ * @{
+ *
+ * @file
+ * @brief       Configuration of SAUL mapped GPIO pins
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   GPIO configuration
+ */
+static const  saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name = "BTN0 (SW0)",
+        .pin  = BTN0_PIN,
+        .mode = BTN0_MODE,
+        .flags = SAUL_GPIO_INVERTED,
+    },
+    {
+        .name = "LED0 (Yellow)",
+        .pin = LED0_PIN,
+        .mode = LED0_MODE,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */

boards/atmega256rfr2-xpro/include/periph_conf.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_atmega256rfr2-xpro
+ * @{
+ *
+ * @file
+ * @brief   Peripheral MCU configuration for the Atmega256RFR2 Xplained Pro
+ *
+ * @author  Alexandre Abadie <alexandre.abadie@inria.fr>
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    Clock configuration
+ * @{
+ */
+#ifndef CLOCK_CORECLOCK
+/* Using 8MHz internal oscillator as default clock source */
+#define CLOCK_CORECLOCK     (8000000UL)
+#endif
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#include "periph_conf_atmega_common.h"
+
+#endif /* PERIPH_CONF_H */

boards/atmega256rfr2-xpro/led_init.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2019 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_atmega256rfr2-xpro
+ * @{
+ *
+ * @file
+ * @brief       Board specific implementation for the Atmega256RFR2 Xplained Pro
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#include "board.h"
+
+void led_init(void)
+{
+    LED0_ENABLE_PORT;
+    LED0_OFF;
+}