boards/olimexino-stm32: add support for olimexino-stm32 board

boards/olimexino-stm32/Makefile

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+MODULE = board
+
+include $(RIOTBASE)/Makefile.base

boards/olimexino-stm32/Makefile.dep

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+ifneq (,$(filter saul_default,$(USEMODULE)))
+  USEMODULE += saul_gpio
+endif

boards/olimexino-stm32/Makefile.features

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+CPU = stm32f1
+CPU_MODEL = stm32f103rb
+
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_adc
+FEATURES_PROVIDED += periph_can
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_pwm
+FEATURES_PROVIDED += periph_rtc
+FEATURES_PROVIDED += periph_rtt
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_timer
+FEATURES_PROVIDED += periph_uart

boards/olimexino-stm32/Makefile.include

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+# we use shared STM32 configuration snippets
+INCLUDES += -I$(RIOTBASE)/boards/common/stm32/include
+
+# set default port depending on operating system
+PORT_LINUX ?= /dev/ttyUSB0
+PROGRAMMER=stm32flash
+
+# Setup of programmer and serial is shared between STM32 based boards
+include $(RIOTMAKE)/boards/stm32.inc.mk

boards/olimexino-stm32/board.c

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+/*
+ * Copyright (C) 2020 Scallog
+ *
+ * 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_olimexino-stm32
+ * @{
+ *
+ * @file
+ * @brief       Board specific implementations for the OLIMEXINO STM32 board
+ *
+ * @author      Corentin Vigourt <cvigourt@scallog.com>
+ */
+
+#include "board.h"
+#include "periph/gpio.h"
+
+void board_init(void)
+{
+    /* initialize the CPU */
+    cpu_init();
+
+    /* initialize the boards LEDs */
+    gpio_init(LED0_PIN, GPIO_OUT);
+    gpio_init(LED1_PIN, GPIO_OUT);
+
+    /* initialize the button */
+    gpio_init(BTN0_PIN, BTN0_MODE);
+}
+/** @} */

boards/olimexino-stm32/doc.txt

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+/**
+@defgroup    boards_olimexino-stm32 STM32 Olimexino-stm32
+@ingroup     boards
+@brief       Support for the Olimexino STM32 board
+
+## Overview
+
+The Olimexino-stm32 is a board from Olimexino family supporting a ARM Cortex-M3
+STM32F103RB microcontroller with 20Kb of SRAM and 128Kb of ROM Flash.
+
+## Hardware
+
+![Olimexino STM32](https://www.olimex.com/Products/Duino/STM32/OLIMEXINO-STM32/images/thumbs/310x230/OLIMEXINO-STM32-01.jpg)
+
+### MCU
+| MCU        | STM32F103RB       |
+|:---------- |:----------------- |
+| Family     | ARM Cortex-M3     |
+| Vendor     | ST Microelectronics |
+| RAM        | 20Kb              |
+| Flash      | 128Kb             |
+| Frequency  | up to 72MHz       |
+| FPU        | no                |
+| Timers     | 7 (2x watchdog, 1 SysTick, 4x 16-bit) |
+| ADCs       | 1x 12-bit (16 channels) |
+| UARTs      | 3                 |
+| SPIs       | 2                 |
+| I2Cs       | 2                 |
+| RTC        | 1                 |
+| USB        | 1                 |
+| CAN        | 1                 |
+| Vcc        | 2.0V - 3.6V       |
+| Datasheet  | [Datasheet](http://www.st.com/resource/en/datasheet/stm32f103rb.pdf) |
+| Reference Manual | [Reference Manual](https://www.st.com/resource/en/reference_manual/cd00171190.pdf) |
+| Programming Manual | [Programming Manual](https://www.st.com/resource/en/programming_manual/cd00228163.pdf) |
+| Board Manual | [Board Manual](https://www.olimex.com/Products/Duino/STM32/OLIMEXINO-STM32/resources/OLIMEXINO-STM32.pdf) |
+
+## Implementation Status
+| Device | ID        | Supported | Comments  |
+|:------------- |:------------- |:------------- |:------------- |
+| MCU        | STM32F103RB   | partly    | Energy saving modes not fully utilized |
+| Low-level driver | GPIO    | yes       | |
+|        | PWM       | yes (4 pins available)  |  |
+|        | UART      | 3 UARTs       | USART2 via D0(RX)/D1(TX), USART1 on PA10(RX)/PA09(TX) and USART3 on PB11(RX)/PB10(TX) |
+|        | ADC       | 6 ADCs       | |
+|        | I2C       | yes (I2C1 and I2C2)       | |
+|        | SPI       | yes (SPI1 and SPI2)       | |
+|        | USB       | no        | |
+|        | Timer     | 3 16 bit timers (TIM2, TIM3 and TIM4)       | |
+
+## Flashing the device
+The Olimexino-stm32 needs to be flashed using stm32flash (repo [here](https://github.com/stm32duino/stm32flash)).
+Once you have installed the program, you can flash the board like this:
+
+```
+make BOARD=olimexino-stm32 flash
+```
+and open a terminal using:
+```
+make BOARD=olimexino-stm32 term
+```
+
+USART1 is used for flashing the board whereas USART2 is the serial Output.
+
+## Supported Toolchains
+For using the OLIMEXINO STM32 board you need to use ```arm-none-eabi```.
+ */

boards/olimexino-stm32/include/board.h

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+/*
+ * Copyright (C) 2020 Scallog
+ *
+ * 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_olimexino-stm32
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the OLIMEXINO STM32 board
+ *
+ * @author      Corentin Vigourt <cvigourt@scallog.com>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+#include "periph_conf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name Xtimer configuration
+ * @{
+ */
+#define XTIMER_WIDTH                (16)
+#define XTIMER_BACKOFF              (19)
+/** @} */
+
+/**
+ * @name LED pin definitions and handlers
+ * @{
+ */
+#define LED0_PORT           GPIOA
+#define LED0_PIN            GPIO_PIN(PORT_A, 1)
+#define LED0_MASK           (1 << 1)
+
+#define LED1_PORT           GPIOA
+#define LED1_PIN            GPIO_PIN(PORT_A, 5)
+#define LED1_MASK           (1 << 5)
+
+#define LED0_ON             (LED0_PORT->BSRR = LED0_MASK)
+#define LED0_OFF            (LED0_PORT->BSRR = (LED0_MASK << 16))
+#define LED0_TOGGLE         (LED0_PORT->ODR  ^= LED0_MASK)
+
+#define LED1_ON             (LED1_PORT->BSRR = LED1_MASK)
+#define LED1_OFF            (LED1_PORT->BSRR = (LED1_MASK << 16))
+#define LED1_TOGGLE         (LED1_PORT->ODR  ^= LED1_MASK)
+
+#define LED_PANIC           LED0_ON
+/** @} */
+
+/**
+ * @name User button
+ * @{
+ */
+#define BTN0_PIN            GPIO_PIN(PORT_C, 9)
+#define BTN0_MODE           GPIO_IN
+/** @} */
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/olimexino-stm32/include/gpio_params.h

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+/*
+ * Copyright (C) 2020 Scallog
+ *
+ * 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_olimexino-stm32
+ * @{
+ *
+ * @file
+ * @brief       Board specific configuration of direct mapped GPIOs
+ *
+ * @author      Corentin Vigourt <cvigourt@scallog.com>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   GPIO pin configuration
+ */
+static const saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name = "LED2",
+        .pin = LED0_PIN,
+        .mode = GPIO_OUT
+    },
+    {
+        .name = "LED1",
+        .pin = LED1_PIN,
+        .mode = GPIO_OUT
+    },
+    {
+        .name = "BUT",
+        .pin = BTN0_PIN,
+        .mode = BTN0_MODE
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */