boards: added support for SiLabs SLWSTK6220A

boards/slwstk6220a/Makefile

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+# tell the Makefile.base which module to build
+MODULE = $(BOARD)_base
+
+include $(RIOTBASE)/Makefile.base

boards/slwstk6220a/Makefile.features

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+FEATURES_PROVIDED += cpp
+
+FEATURES_PROVIDED += periph_cpuid
+FEATURES_PROVIDED += periph_gpio
+FEATURES_PROVIDED += periph_timer
+FEATURES_PROVIDED += periph_uart
+
+FEATURES_MCU_GROUP = cortex_m4

boards/slwstk6220a/Makefile.include

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+# define the cpu used by WSTK6220
+export CPU = ezr32wg
+export CPU_MODEL = ezr32wg330f256r60
+
+# set default port depending on operating system
+PORT_LINUX ?= /dev/ttyACM0
+PORT_DARWIN ?= $(shell ls -1 /dev/tty.usbmodem* | head -n 1)
+
+# setup the boards dependencies
+include $(RIOTBOARD)/$(BOARD)/Makefile.dep
+
+# setup JLink for flashing
+export JLINK_DEVICE := ezr32wg330f256
+include $(RIOTBOARD)/Makefile.include.jlink
+
+# setup serial terminal
+include $(RIOTBOARD)/Makefile.include.serial
+
+# include cortex defaults
+include $(RIOTBOARD)/Makefile.include.cortexm_common

boards/slwstk6220a/board.c

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+/*
+ * Copyright (C) 2015 Freie Universität Berlin
+ *
+ * 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_wstk6220
+ * @{
+ *
+ * @file
+ * @brief       Board specific implementations WSTK6220 board
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include "board.h"
+#include "cpu.h"
+#include "periph/gpio.h"
+
+void board_init(void)
+{
+    /* enable access to the evaluation board controller chip. Without this, the
+     * board controller does not forward the UART output to the USB port */
+    gpio_init(BC_PIN, GPIO_DIR_OUT, GPIO_NOPULL);
+    gpio_set(BC_PIN);
+    /* initialize the boards LEDs */
+    gpio_init(LED0_PIN, GPIO_DIR_OUT, GPIO_NOPULL);
+    gpio_init(LED1_PIN, GPIO_DIR_OUT, GPIO_NOPULL);
+    /* initialize the CPU */
+    cpu_init();
+}

boards/slwstk6220a/include/board.h

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+/*
+ * Copyright (C) 2015 Freie Universität Berlin
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup    boards_wstk6220 Silicon Labs WSTK6220 Eval Kit
+ * @ingroup     boards
+ * @brief       Support for the Silicon Labs WSTK6220 evaluation kit
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the WSTK6220 evaluation kit
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+#include "periph_conf.h"
+#include "periph_cpu.h"
+#include "periph/gpio.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Define the nominal CPU core clock in this board
+ */
+#define F_CPU               (CLOCK_CORECLOCK)
+
+/**
+ * @brief   Assign the hardware timer
+ */
+#define HW_TIMER            TIMER_DEV(0)
+
+/**
+ * @brief   Define UART device and baudrate for STDIO
+ * @{
+ */
+#define STDIO               UART_DEV(0)
+#define STDIO_BAUDRATE      (115200U)
+#define STDIO_RX_BUFSIZE    (64U)
+/** @} */
+
+/**
+ * @brief   Connection to the on-board temperature/humidity sensor (Si7021)
+ * @{
+ */
+#define SI7021_I2C          (I2C_0)
+#define SI7021_ADDR         (0)     /* TODO */
+#define SI7021_EN_PIN       GPIO_PIN(PF,8)
+/** @} */
+
+/**
+ * @brief   GPIO pin for enabling communication through the board controller
+ */
+#define BC_PIN              GPIO_PIN(PA,12)
+
+/**
+ * @brief   User button pin definitions
+ * @{
+ */
+#define PB0_PIN             GPIO_PIN(PE,3)
+#define PB1_PIN             GPIO_PIN(PE,2)
+/** @} */
+
+/**
+ * @brief    LED pin definitions
+ * @{
+ */
+#define LED0_PIN            GPIO_PIN(PF,6)
+#define LED1_PIN            GPIO_PIN(PF,7)
+/** @} */
+
+/**
+ * @brief   Macros for controlling the on-board LEDs.
+ * @{
+ */
+#define LED0_ON             gpio_set(LED0_PIN)
+#define LED0_OFF            gpio_clear(LED0_PIN)
+#define LED0_TOGGLE         gpio_toggle(LED0_PIN)
+#define LED1_ON             gpio_set(LED1_PIN)
+#define LED1_OFF            gpio_clear(LED1_PIN)
+#define LED1_TOGGLE         gpio_toggle(LED1_PIN)
+
+/* for compatability to other boards */
+#define LED_GREEN_ON        LED1_ON
+#define LED_GREEN_OFF       LED1_OFF
+#define LED_GREEN_TOGGLE    LED1_TOGGLE
+#define LED_ORANGE_ON       /* not available */
+#define LED_ORANGE_OFF      /* not available */
+#define LED_ORANGE_TOGGLE   /* not available */
+#define LED_RED_ON          LED0_ON
+#define LED_RED_OFF         LED0_OFF
+#define LED_RED_TOGGLE      LED0_TOGGLE
+/** @} */
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/slwstk6220a/include/periph_conf.h

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+/*
+ * Copyright (C) 2015 Freie Universität Berlin
+ *
+ * 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_wstk6220
+ * @{
+ *
+ * @file
+ * @brief       Configuration of CPU peripherals for the WSTK6220 board
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#include <stdint.h>
+#include "cpu.h"
+#include "periph_cpu.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Clock configuration
+ * @{
+ */
+#define CLOCK_RCOSC         (14000000)      /* internal RC oscillator speed */
+/* external oscillator speed, comment out if you want to use the internal RC
+ * oscillator circuit as a clock source */
+#define CLOCK_HFXO          (48000000U)
+/* define clock dividers */
+#define CLOCK_HFCORECLKDIV  (1U)            /* core clock divider */
+#define CLOCK_HFPERCLKDIV   (1U)            /* peripheral clock divider */
+
+/* generate the actual clock values */
+#ifdef CLOCK_HFXO
+#define CLOCK_CORECLOCK     (CLOCK_HFXO / CLOCK_HFCORECLKDIV)
+#else
+#define CLOCK_CORECLOCK     (CLOCK_RCOSC / CLOCK_HFCORECLKDIV)
+#endif
+#define CLOCK_HFPERCLK      (CLOCK_CORECLOCK / CLOCK_HFPERCLKDIV)
+/** @} */
+
+/**
+ * @brief   Timer configuration
+ * @{
+ */
+static const timer_conf_t timer_config[] = {
+    {
+        TIMER0,             /* lower numbered timer, used as pre-scaler */
+        TIMER1,             /* higher numbered timer, this is the one */
+        5,                  /* pre-scaler bit in the CMU register */
+        TIMER1_IRQn,        /* IRQn of the higher numbered driver */
+    }
+};
+
+#define TIMER_0_ISR         isr_timer1
+#define TIMER_0_MAX_VALUE   (0xffff)            /* 16-bit timer */
+#define TIMER_NUMOF         (sizeof(timer_config) / sizeof(timer_config[0]))
+/** @} */
+
+/**
+ * @brief   UART configuration
+ * @{
+ */
+static const uart_conf_t uart_config[] = {
+    {
+        USART2,             /* device */
+        GPIO_PIN(PB,4),     /* RX pin */
+        GPIO_PIN(PB,3),     /* TX pin */
+        1,                  /* AF location */
+        2,                  /* bit in CMU enable register */
+        USART2_RX_IRQn      /* IRQ base channel */
+    },
+};
+
+#define UART_0_ISR_RX       isr_usart2_rx
+#define UART_NUMOF          (sizeof(uart_config) / sizeof(uart_config[0]))
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CONF_H */
+/** @} */